Truss frame support structure

Abstract

To improve the workability of a truss frame by minimizing the work required for constructing support metal fittings that support the truss frame, and to improve the workability of maintenance by easily replacing the support metal fittings. [Solution] A support structure for steel truss frames 4, 5 that are installed across two structures 21, 22 and 23, 24 that are spaced apart from each other, and a support hardware 10 for supporting the truss frame from below is fixed to each side of the two structures across which the truss frame is installed. The support hardware has a fixing part 11 that contacts the side of the structure and is fixed to the side by a first fixing device LB (DS) so that the support hardware can be fixed to the side of the structure later, and a support part 12 that is installed at the upper end of the fixing part and contacts the lower end of the truss frame and is fixed to the lower end of the truss frame by a second fixing device DS.

Description

[Technical Field]

[0001] The present invention relates to a support structure for a truss frame. [Background technology]

[0002] BACKGROUND ART Conventionally, there is known a technique relating to a roof support structure in which a truss beam for supporting a roof panel is provided so as to span between two structures spaced apart from each other. In Patent Document 1, truss support hardware is pre-fixed to two structural members spaced apart from each other, and the truss beam is spanned between the two truss support hardware and then connected to each of the truss support hardware. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Publication No. 04-036015 Summary of the Invention [Problem to be solved by the invention]

[0004] In conventional roof support structures, it is necessary to fix the truss support bracket to two structural members in advance, and the two structural members require advance preparation for positioning, such as marking, in order to fix the truss support bracket. As a result, installing the truss support bracket, and in turn the truss beam, is time-consuming, and there is a need to eliminate this construction work. Furthermore, because the truss beams are placed on the truss support brackets, and the roof panels are then attached to the truss beams, it was extremely difficult to replace the truss support brackets even if maintenance became necessary after the roof was installed.

[0005] The present invention was made in consideration of the above circumstances, and its purpose is to improve the workability of truss structures by minimizing the construction work required for the support metal fittings that support the truss structure, and to improve maintenance workability by making it easy to replace the support metal fittings. [Means for solving the problem]

[0006] The means for solving the above problems is a support structure for a steel truss frame that is installed between two structures that are spaced apart from each other, Support hardware for supporting the truss frame from below is fixed to each side of the two structural bodies across which the truss frame is spanned, The support metal fittings are configured so that they can be fixed to the side surfaces of the structure afterwards. a fixing portion that contacts the side surface and is fixed to the side surface by a first fixing device; The present invention is characterized by having a support portion provided at the upper end of the fixing portion, contacting the lower end of the truss frame, and fixed to the lower end of the truss frame by a second fixing device. [Effects of the Invention]

[0007] According to the present invention, the work involved in constructing support metal fittings can be minimized, thereby improving the ease of construction of truss structures, and the support metal fittings can be easily replaced, improving the ease of maintenance work. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a cross-sectional view showing the south portion of the building, including a roof supported by a horizontal truss structure. [Figure 2] FIG. 1 is a cross-sectional view showing the north portion of a building including a roof supported by a sloped truss structure. [Figure 3] FIG. 2 is a front view showing the horizontal truss structure. [Figure 4] This is a diagram showing the fit of the upper end of the beam and the upper chord member located in the longitudinal center of the horizontal truss structure. [Figure 5] This is a diagram showing the fit of the lower ends of the beams, the lower ends of the diagonal members, and the lower chord members located in the longitudinal center of the horizontal truss structure. [Figure 6] This is a diagram showing the fit of the upper ends of the beams, the upper ends of the diagonal members, and the upper chord members arranged in locations other than the center and both ends of the length of the horizontal truss structure. [Figure 7] This is a diagram showing the fit of the lower ends of the beams, the lower ends of the diagonal members, and the lower chord members arranged in locations other than the center and both ends of the length of the horizontal truss structure. [Figure 8] This is a diagram showing the fit of the upper end of the end beam, the upper end of the diagonal beam, and the upper chord, which are arranged at one end of the horizontal truss structure in the longitudinal direction. [Figure 9] This is a side view showing the fitting of the protruding end of the upper chord of the horizontal truss frame to the shear wall. [Figure 10] This is a plan view showing the fit of the protruding end of the upper chord of the horizontal truss frame and the shear wall. [Figure 11] This is a diagram showing the fit of the lower end of the end beam, the lower chord, and the support hardware located at one end of the horizontal truss structure in the longitudinal direction. [Figure 12] 1A and 1B are a side view, a front view, and a plan view showing a support hardware that supports the horizontal truss structure from below. [Figure 13] FIG. 1 is a front view showing a gradient truss frame. [Figure 14] This is a diagram showing the fit of the upper ends of the end beams, the upper ends of the diagonal beams, and the upper chord members arranged at both longitudinal ends of the gradient truss structure. [Figure 15] This is a diagram showing the fit of the lower ends of the end beams, the lower chord members, and the support hardware arranged at both ends of the gradient truss structure in the longitudinal direction. [Figure 16] FIG. 1 is a side cross-sectional view showing an aspect in which horizontal truss frames or gradient truss frames are arranged side by side. [Figure 17] FIG. 10 is a side view showing an arrangement of support metal fittings. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Disclosure Summary> This specification discloses the following support structure of a truss frame. The reference numerals described in the outline of this disclosure are referenced in Figs. 1 to 17. These reference numerals are provided to facilitate understanding of the support structure of the truss frame, and the scope of the present invention is not limited to the examples shown in the drawings.

[0010] (1) First aspect One aspect of the present disclosure is a support structure for steel truss frames 4 and 5 that are bridged between two structures 21, 22 and 23, 24 that are spaced apart from each other, as shown in, for example, FIGS. 11, 12, 15, and 17, A support metal fitting 10 for supporting the truss frames 4 and 5 from below is fixed to each side of the two structural bodies 21, 22, 23, 24 across which the truss frames 4 and 5 are spanned. The support metal fittings 10 are configured so that the support metal fittings 10 can be fixed to the side surfaces of the structures 21, 22, 23, and 24 after installation. a fixing portion 11 that contacts the side surface and is fixed to the side surface by a first fixing tool LB (DS); The truss frame 4, 5 is characterized by having a support part 12 that is provided at the upper end of the fixing part 11 and contacts the lower end of the truss frame 4, 5, and is fixed to the lower end of the truss frame 4, 5 by a second fixing device DS.

[0011] According to the first aspect, the support metal 10 for supporting the truss frames 4, 5 from below has a fixing portion 11 that contacts the side surface of the structural members 21, 22, 23, 24 and is fixed to the side surface of the structural members 21, 22, 23, 24 by first fixing devices LB (DS), and a support portion 12 that is provided at the upper end of the fixing portion 11 and contacts the lower end of the truss frames 4, 5 and is fixed to the lower end of the truss frames 4, 5 by second fixing devices DS. Therefore, once the truss frames 4, 5 are spanned between the two structural members 21, 22, 23, 24 and can be maintained in this state, the support metal 10 can be fixed to the side surface of the structural members 21, 22, 23, 24 after installation. This eliminates the need for advance positioning preparation required to fix the support metal 10 in advance, minimizing the construction work required for the support metal 10, thereby improving the construction efficiency of the truss frames 4, 5. Furthermore, if it becomes possible to fix the support hardware 10 to the sides of the structures 21, 22, 23, and 24 after installation, the support hardware 10 can be easily replaced, thereby improving the ease of maintenance work related to the support hardware 10, the truss structures 4 and 5, and ultimately the roof 3.

[0012] (2) Second aspect The support structure of the truss frames 4 and 5 according to one embodiment of the present disclosure is, for example, as shown in FIGS. 11, 12, 15, and 17, in the first embodiment described above, The support portion 12 is a support plate portion 12a that is fixed in contact with the lower end surface at the lower end portion of the truss frame 4, 5; and a spring-up portion 12b provided at both widthwise ends of the support plate portion 12a and in contact with both side surfaces of the lower end portions of the truss frames 4 and 5.

[0013] According to the second aspect, the support portion 12 fixed to the lower end of the truss frame 4, 5 includes a support plate portion 12a fixed in contact with the lower end surface of the lower end of the truss frame 4, 5, and a spring-up portion 12b contacting both side surfaces of the lower end of the truss frame 4, 5. Therefore, the widthwise positioning of the support metal 10 can be easily performed by simply applying the support portion 12 to the lower end of the truss frame 4, 5. Furthermore, the support metal 10 can be easily positioned with respect to the structures 21, 22, 23, 24 by simply contacting the fixing portion 11 with the structures 21, 22, 23, 24. Therefore, the advance positioning preparation required for fixing the support metal 10 in advance can be omitted, and the construction work related to the support metal 10 can be minimized, thereby improving the constructability of the truss frame 4, 5.

[0014] (3) Third aspect The support structure of the truss frames 4 and 5 according to one embodiment of the present disclosure is, for example, as shown in FIGS. 12 and 17 in the second embodiment described above, The corners between the lower end surfaces and both side surfaces at the lower ends of the truss frames 4 and 5 are formed in an arc shape in cross section, In the support portion 12, a portion between each end of the support plate portion 12a in the width direction and the flip-up portion 12b is an inside corner portion formed in an arc shape in a cross-sectional view, The outer radius of curvature of the corner portion and the inner radius of curvature of the inside corner portion are set equal to each other.

[0015] According to the third aspect, the outer radius of curvature at the corners of the lower ends of the truss frames 4, 5 and the inner radius of curvature at the recessed corners of the support plate portions 12a are set equal, so that the lower ends of the truss frames 4, 5 and the support portions 12 of the support hardware 10 fit together perfectly, facilitating the positioning of the support hardware 10. This minimizes the amount of work required to install the support hardware 10, improving the ease of installation of the truss frames 4, 5.

[0016] (4) Fourth aspect The support structure of the truss frames 4 and 5 according to one embodiment of the present disclosure is, for example, as shown in FIGS. 12 and 17 in the third embodiment, A gap into which the welding material can melt is formed between the side surface of the fixing portion 11 of the flip-up portion 12b, which is formed in an arc shape in cross section, and the end face of the fixing portion 11 on the flip-up portion 12b side.

[0017] According to the fourth aspect, the side surface of the fixed portion 11 of the arc-shaped flip-up portion 12b of the support portion 12 faces the end face of the fixed portion 11 on the side of the flip-up portion 12b, and the gap between these surfaces (i.e., the gap) has a smooth curved surface formed in an arc along the arc-shaped flip-up portion 12b. Therefore, when the support portion 12 and the fixed portion 11 are joined by welding, the welding material easily penetrates into the gap, making it easier to improve the joining strength between the support portion 12 and the fixed portion 11.

[0018] (5) Fifth aspect The support structure of the truss frames 4 and 5 according to one embodiment of the present disclosure is, for example, as shown in FIGS. 11, 12, 15, and 17, in the first embodiment described above, The fixing portion 11 is a fixing plate portion 11a fixed in contact with the side surface; The fixing plate portion 11a is formed integrally with the reinforcing plate portion 11b, and the upper end portion of the reinforcing plate portion 11b is fixed to the support portion 12.

[0019] According to the fifth aspect, the fixing portion 11 comprises a fixing plate portion 11a that is fixed in contact with the side surface of the structures 21, 22, 23, and 24, and a reinforcing plate portion 11b that is formed integrally with the fixing plate portion 11a and has its upper end fixed to the support portion 12. Therefore, the reinforcing plate portion 11b can improve the integrity of the fixing portion 11 and the support portion 12 while also improving the rigidity of the entire support hardware 10.

[0020] (6) Sixth Aspect The support structure of the truss frames 4 and 5 according to one embodiment of the present disclosure is, for example, as shown in FIGS. 1 to 15, in the first embodiment described above, The truss structures 4 and 5 are Upper chord members 40 and 50, Lower chord members 41, 51 arranged parallel or approximately parallel to the upper chord members 40, 50; and web members (42, 43, 44, 52, 53, 54) that connect the upper chord members 40, 50 and the lower chord members 41, 51, The lower chord members 41, 51 are set to have a length dimension that is approximately equal to the distance from the side surface of one of the structures 21, 22, 23, 24 to the side surface of the other of the structures 21, 22, 23, 24, The upper chord members 40, 50 are formed longer than the lower chord members 41, 51, and are characterized in that both ends in the length direction protrude outward.

[0021] According to the sixth aspect, the upper chords 40, 50 are formed longer than the lower chords 41, 51, and both longitudinal ends protrude outward. Therefore, simply by placing both longitudinal ends of the upper chords 40, 50 on the upper end surfaces of the two structural bodies 21, 22, 23, 24, respectively, the steel truss frames 4, 5 can be easily spanned and maintained between the two structural bodies 21, 22, 23, 24 spaced apart from each other. This allows the support hardware 10 to be fixed to the side surfaces of the structural bodies 21, 22, 23, 24 after installation. This eliminates the need for prior positioning preparations required to fix the support hardware 10, minimizing the construction work required for the support hardware 10, thereby improving the constructability of the truss frames 4, 5. Furthermore, since the support hardware 10 can be fixed to the sides of the structures 21, 22, 23, and 24 after installation, the support hardware 10 can be easily replaced, improving the ease of maintenance work related to the support hardware 10, the truss structures 4 and 5, and ultimately the roof 3.

[0022] (7) Seventh aspect The support structure of the truss frame 4 according to one embodiment of the present disclosure, as shown in, for example, FIGS. 1, 3 to 12, 16, and 17, in the sixth embodiment, is as follows: The upper end surface of one of the structures 21 and the upper end surface of the other structure 22 are set at the same height position, The truss frame 4 is characterized in that it is a horizontal truss frame 4 in which the upper chord members 40 are arranged horizontally.

[0023] According to the seventh aspect, the upper end surface of one structure 21 and the upper end surface of the other structure 22 are set at the same height position, and the truss structure 4 is a horizontal truss structure 4 in which the upper chord 40 is arranged horizontally, so that both longitudinal ends of the horizontal lower chord 41, which is arranged parallel or approximately parallel to the horizontal upper chord 40, can be reliably and stably supported by the add-on support hardware 10.

[0024] (8) Eighth aspect As shown in, for example, FIGS. 2 and 13 to 17, the support structure of the truss frame 5 according to one embodiment of the present disclosure is, in the sixth embodiment, The upper end surface of one of the structures 23 is located higher than the upper end surface of the other structure 24, The truss frame 5 is a gradient truss frame 5 in which the upper chord member 50 is arranged at an incline, The lower chord member 51 is A long lower chord body arranged parallel or approximately parallel to the upper chord member 50; and a short angle adjustment portion 51a arranged horizontally at both ends of the lower chord body in the longitudinal direction, The support portion 12 of the support metal fitting 10 is characterized in that it is fixed in contact with the angle adjustment portion 51a.

[0025] According to the eighth aspect, even if the lower chord 51 of the gradient truss frame 5 is arranged parallel or approximately parallel to the upper chord 50 and is inclined, the angle adjustment portions 51a at both longitudinal ends are arranged horizontally, so even if the gradient truss frame 5 is arranged at an incline, the lower end of the gradient truss frame 5 can be reliably and stably supported from below by the add-on support hardware 10.

[0026] (9) Ninth aspect The support structure of the truss frames 4 and 5 according to one embodiment of the present disclosure is, for example, as shown in FIG. 17 , in the first embodiment described above, The first row of truss frames 4, 5 and the second row of truss frames 4, 5 are arranged adjacent to each other to form a set of truss frames, which are bridged between the two structures 21, 22 and 23, 24, The support metal fittings 10 are characterized in that they are positioned and fixed on the side surfaces of the two structures 21, 22, 23, 24 at positions corresponding to the lower ends of the first row of truss structures 4, 5 and at positions corresponding to the lower ends of the second row of truss structures 4, 5.

[0027] According to the ninth aspect, the lower ends of a set of truss frames, in which a first row of truss frames 4, 5 and a second row of truss frames 4, 5 are adjacent to each other, can be reliably and stably supported from below by support metal fittings 10, 10 arranged at positions corresponding to the lower ends of the first row of truss frames 4, 5 and at positions corresponding to the lower ends of the second row of truss frames 4, 5. Therefore, it becomes possible to stably support the roof 3 by a roof support structure including a set of two rows of truss frames.

[0028] In recent years, there has been a demand for the realization of a decarbonized society through the promotion of carbon neutrality, which reduces carbon dioxide emissions to virtually zero, and for the achievement of the SDGs (Sustainable Development Goals), and in the construction industry, efforts are being made to build buildings using wood, which has low carbon dioxide emissions.Since buildings to which the truss frame support structure according to one embodiment of the present disclosure is applied are wooden, this can contribute to the realization of a decarbonized society through the promotion of carbon neutrality and the achievement of the SDGs.

[0029] <Embodiment> Hereinafter, embodiments of the present invention will be described with reference to the drawings. However, the embodiments described below are subject to various limitations that are technically preferable for carrying out the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples. Note that the directions and orientations in the following embodiments and illustrated examples are set solely for the convenience of explanation.

[0030] (Building overview) 1 and 2, reference numeral 1 indicates a building. That is, FIG. 1 shows a portion of building 1 located south of a predetermined position in the east-west direction, and FIG. 2 shows a portion of building 1 located north of the predetermined position in the east-west direction. This building 1 is a single-story building whose main structure is made of wood and whose roof 3 is supported by a truss frame made of lightweight steel. Note that, although building 1 in this embodiment is formed to be longer overall in the east-west direction than in the north-south direction, this is not limited thereto, and it may be formed to be longer in the north-south direction than in the east-west direction.

[0031] The building 1 is a non-residential building and is used, for example, as an office, warehouse, store, factory, or various other facilities. However, the uses are not limited to these, and the building may be used as a temporary exhibition hall or event venue, or as a residence if it meets certain building standards. In this embodiment, the building 1 is used, for example, as an office.

[0032] Furthermore, the building 1 is constructed using a panel construction method in which the building components, such as the walls, floors, and roof 3, are panelized in advance at a factory as architectural wood panels P (architectural wall panels, architectural floor panels, architectural roof panels), and then assembled at the construction site to construct the building. However, this is not limited to this, and the building 1 may be constructed of wood using conventional frame construction or wall construction, steel frame construction, reinforced concrete construction, etc., within the scope of structural feasibility.

[0033] Here, architectural wood panels P are made by assembling vertical and horizontal frame members into a rectangular shape, with auxiliary beam members assembled vertically and horizontally inside the rectangular frame to form a frame body, with face materials attached to one or both sides of this frame body, resulting in a hollow structure.Furthermore, this hollow space is usually filled with insulating material such as glass wool or rock wool.

[0034] Such a building 1 comprises a building body 2 supported by a foundation and having room spaces formed therein, a roof 3 provided on top of the building body 2, and truss structures 4 and 5 which are the roof support structure.

[0035] The building body 2 has internal room spaces separated by partition walls (interior walls) that are non-load-bearing walls, and has multiple rooms 2a, 2b, and 2c as shown in Figures 1 and 2. Note that some of the partition walls may include walls that are not made of architectural wall panels (partition walls that do not contribute to the structure). The first room 2a shown in Figure 1 is a common space, the second room 2b shown in Figure 2 is a business space, and the third room 2c located between the first room 2a and the second room 2b is a corridor.

[0036] The building body 2 also has multiple bearing walls, including an exterior wall facing the outdoors, which are constructed from architectural wood panels P. Some bearing walls have openings formed in them. If the bearing wall is an exterior wall, a window sash is provided in the opening, and if the bearing wall is an interior wall like a partition wall, a door, sliding door, or other fixture is provided.

[0037] Of the architectural wood panels P that make up the building body 2, the frame members or auxiliary crosspiece members of the architectural wall panels P that make up the walls of the building body 2 function as core members or fixing base members. Therefore, architectural wall panels or truss structures 4, 5 that make up other walls that are arranged perpendicularly in plan view are attached and fixed to the frame members or auxiliary crosspiece members of the architectural wall panels that make up the walls that are arranged in predetermined positions.

[0038] 1 and 2, the roof 3 has a first roof section 3a located on the south side of the ridge and a second roof section 3b located on the north side. In other words, the roof 3 is a gable roof.

[0039] The roof 3 is made up of architectural roof panels from architectural wood panels P. More specifically, the roof 3 is made up of a plurality of architectural roof panels joined together to form a first roof section 3a and a second roof section 3b, which are supported by truss frames 4 and 5, which are roof support structures.

[0040] The truss structures 4, 5 that support the roof 3 (3a, 3b) include a horizontal truss structure 4 located on the south side that supports the first roof section 3a, and a slope truss structure 5 located on the north side that supports the second roof section 3b. These horizontal truss structures 4 and slope truss structures 5 are mainly constructed of lightweight steel frames.

[0041] The horizontal truss frame 4 is formed in a rectangular shape in a side view and is arranged horizontally. The horizontal truss frame 4 is located on the south side of the building body 2, and is provided to span between the upper ends of two load-bearing walls (first load-bearing wall 21 and second load-bearing wall 22) that are arranged in parallel and spaced apart in the north-south direction.

[0042] Here, the first bearing wall 21 and the second bearing wall 22 are formed long in the east-west direction in plan view, and both ends in the longitudinal direction are arranged to bridge the first bearing wall 21 and the second bearing wall 22 in plan view, and are joined and fixed to the frame members or auxiliary crosspiece members of the architectural wall panels that make up the other bearing walls. Note that either or both of the first bearing wall 21 and the second bearing wall 22 may not be perpendicular to the horizontal truss frame 4, but may be arranged in the same direction.

[0043] A plurality of horizontal truss frames 4 are arranged at intervals in the east-west direction. In other words, the plurality of horizontal truss frames 4 arranged at intervals in the east-west direction are provided to span between the upper ends of a plurality of bearing walls (first bearing wall 21, second bearing wall 22) arranged at intervals in the north-south direction.

[0044] The horizontal truss structures 4 are arranged at intervals between them and the first roof portion 3a, and indirectly support the first roof portion 3a. In other words, a space is formed between the horizontal truss structures 4 and the first roof portion 3a, and this space can be used as an attic space, for example, as a storage space for storing various items or as an equipment installation space for installing various types of equipment. Furthermore, ceiling panels that form the ceiling of the first room 2a may be attached to the lower surfaces of these horizontal truss structures 4.

[0045] Unlike the horizontal truss frame 4, the gradient truss frame 5 is formed in the shape of a parallelogram when viewed from the side and is arranged so that the upper and lower surfaces are inclined. Such gradient truss frame 5 is located on the north side of the building main body 2, and is installed to span between the upper ends of two load-bearing walls (the third load-bearing wall 23 and the fourth load-bearing wall 24) that are arranged at an interval in the north-south direction.

[0046] Here, the third bearing wall 23 and the fourth bearing wall 24 are formed long in the east-west direction in plan view, and both ends in the longitudinal direction are arranged to bridge the third bearing wall 23 and the fourth bearing wall 24 in plan view, and are joined and fixed to the frame members or auxiliary crosspiece members of the architectural wall panels that make up the other bearing walls. Note that either or both of the third bearing wall 23 and the fourth bearing wall 24 may not be perpendicular to the slope truss frame 5, but may be arranged in the same direction.

[0047] A plurality of gradient truss frames 5 are arranged at intervals in the east-west direction. In other words, a plurality of gradient truss frames 5 arranged at intervals in the east-west direction are bridged between the upper ends of a plurality of load-bearing walls arranged at intervals in the north-south direction.

[0048] The second roof portion 3b is placed directly on the upper surfaces of the plurality of gradient truss frames 5, and supports the second roof portion 3b. In addition, ceiling panels that form the ceiling of the second room 2b may be attached to the underside of these multiple slope truss structures 5, or a framework for forming the ceiling (hanging beams, rafters, rafters, etc.) may be attached.

[0049] (Details of the horizontal truss structure) FIG. 3 is a front view showing the horizontal truss frame 4. As shown in FIG. As shown in Figures 3 to 11, the horizontal truss structure 4 comprises a plurality of truss members, including an upper chord member 40, a lower chord member 41, two end struts 42, a plurality of struts 43, and a plurality of diagonal members 44, as well as a plurality of gusset plates 45A to 45F and a clamping plate 46 provided at the intersections (also called nodes) of each truss member 40 to 44. In addition, the upper chord member 40 and the lower chord member 41 are also called flange members in relation to the two end struts 42, the multiple struts 43 and the multiple diagonal members 44, and the two end struts 42, the multiple struts 43 and the multiple diagonal members 44 are also called web members (belt members) in relation to the upper chord member 40 and the lower chord member 41.

[0050] The upper chord 40, the lower chord 41, the two end struts 42, the struts 43, and the diagonal members 44 are made of lip channel steel (also called lipped channel steel, channel material, C-channel, etc.), which is a lightweight steel frame material formed into an approximately C-shape in cross section. That is, each member 40 to 44 has a web W, flanges F provided at both ends of the web W in cross section, and lip portions L provided at the tips of the flanges F at both ends. However, each truss member is not limited to this type of lip channel steel, and other shapes of lightweight steel frame members may be used without departing from the spirit of the present invention. That is, channel steel may be used, or a square steel pipe may be partially machined to form an opening. Also, lightweight steel frame members with an I-shaped or H-shaped cross section may be used with plates attached for connecting gusset plates.

[0051] The upper chord member 40 is also made up of a pair of lip channel steels. These two lip channel steels are arranged back-to-back and are treated as a single upper chord member 40. In other words, the upper chord member 40 functions as two lip channel steels arranged with their webs W adjacent to each other and joined with a gusset plate 45 interposed between the webs W, as described below. The lower chord 41, like the upper chord 40, is also composed of a pair of lip channel steel members.

[0052] The upper chord 40 is located at the top of the horizontal truss frame 4, and is a member that is primarily subjected to compressive forces. It is formed longer than the lower chord 41, and both longitudinal ends thereof protrude laterally (outside in the north-south direction) beyond both longitudinal ends of the lower chord 41. In other words, the upper chord 40 has protruding side ends 40a at both longitudinal ends that protrude laterally (outside in the north-south direction) beyond the lower chord 41. Here, the upper chord 40 refers to a pair of lip channel steel, as described above.

[0053] The lower chord 41 is located at the bottom of the horizontal truss frame 4 and is a member that is mainly subjected to tension force. It is formed to be shorter than the upper chord 40. Furthermore, the lower chord 41 is arranged below the upper chord 40 with a gap between them and parallel or approximately parallel to the upper chord 40. Here, the lower chord 41 refers to a pair of lip channel steel, as described above.

[0054] The end beams 42 are vertical members of the horizontal truss frame 4 that connect the upper chord 40 and the lower chord 41 to transmit axial force, and are located at both longitudinal ends of the horizontal truss frame 4. More specifically, they are installed between the portions immediately before the protruding end portions 40a at both longitudinal ends of the upper chord 40 and both longitudinal ends of the lower chord 41, thereby connecting the upper chord 40 and the lower chord 41. Therefore, the protruding end portions 40a of the upper chord 40 protrude laterally (outward in the north-south direction) beyond the end beams 42.

[0055] The struts 43 are vertical members that connect the upper chords 40 and lower chords 41 of the horizontal truss frame 4 to transmit axial force, and refer to a plurality of struts 43 that are provided at positions excluding the end struts 42 among the struts provided in the horizontal truss frame 4. These multiple struts 43 include one strut 43 located at the center in the longitudinal direction of the horizontal truss frame 4, and multiple struts 43 provided between the one strut 43 and the end struts 42. All of the rafters, including the multiple rafters 43 and end rafters 42, are arranged at approximately equal intervals between the parallel or approximately parallel upper chord 40 and lower chord 41.

[0056] The diagonal members 44 are members of the horizontal truss frame 4 that are diagonally spanned from the upper chord members 40 to the lower chord members 41, and serve to disperse external forces when they are applied to the horizontal truss frame 4. In this embodiment, the multiple diagonal members 44 are attached so that their attachment orientations are diametrically opposite at one end and the other end of the horizontal truss frame 4 in the longitudinal direction, with the central beam member 43 as the boundary. That is, the diagonal members 44 span diagonally from the upper end of the end beam member 42 to the lower end of the beam member 43 arranged adjacent to the end beam member 42. Furthermore, with the central beam member 43 as the boundary, all of the diagonal members 44 arranged at one end of the longitudinal direction of the horizontal truss frame 4 are arranged in the same direction, and all of the diagonal members 44 arranged at the other end of the longitudinal direction are arranged in the same direction.

[0057] Any gap can be used as space for wiring and / or piping, such as the gap between end struts 42 and diagonal members 44, between multiple struts 43 and diagonal members 44, the gap between pairs of lip channel steel that make up upper chord member 40, the gap between pairs of lip channel steel that make up lower chord member 41, and the internal space of the lip channel steel that opens outward in each of members 40 to 44. When not used as space for wiring and / or piping (or even when used), insulation or fireproof material may be filled in.

[0058] The multiple gusset plates 45A to 45F are steel plates used to join the members 40 to 44 together at the nodes of the horizontal truss frame 4. The multiple gusset plates 45A to 45F have different shapes depending on where they are placed, and are shaped to reliably cover the joints of the members 40 to 44. The pair of lip channel steels that make up the upper chord member 40 and the lower chord member 41 sandwich the multiple gusset plates 45A to 45F. The plurality of gusset plates 45A to 45F include a first gusset plate 45A, a second gusset plate 45B, a third gusset plate 45C, a fourth gusset plate 45D, a fifth gusset plate 45E, and a sixth gusset plate 45F. Of these multiple gusset plates 45A to 45F, the first gusset plate 45A, the third gusset plate 45C, and the fifth gusset plate 45E are upper gusset plates arranged along the upper chord member 40 of the horizontal truss frame 4, and the second gusset plate 45B, the fourth gusset plate 45D, and the sixth gusset plate 45F are lower gusset plates arranged along the lower chord member 41 of the horizontal truss frame 4. The upper chord member 40 is joined to the upper part of the upper gusset plate, and the lower chord member 41 is joined to the lower part of the lower gusset plate.

[0059] The sandwiching plate 46 is a steel plate sandwiched between a pair of lip channel steels that make up the upper chord member 40 and the lower chord member 41, and is set to the same thickness as the multiple gusset plates 45A to 45F. It is positioned at a distance from the multiple gusset plates 45A to 45F, and is joined and fixed to the pair of lip channel steels with drill screws DS. The pair of lip channel steels that make up the upper chord member 40 and the lower chord member 41 are sandwiched between multiple gusset plates 45A-45F, which creates gaps that make the pair of lip channel steels more susceptible to deflection. However, by sandwiching and fastening such a sandwiching plate 46 between the pair of lip channel steels that make up the upper chord member 40 and the lower chord member 41, such deflection becomes less likely to occur, and as a result, the rigidity of the upper chord member 40 and the lower chord member 41 can be improved.

[0060] Next, the configuration of each of the gusset plates 45A to 45F will be described in detail. As shown in Figures 3 and 4, the first gusset plate 45A is a steel plate used to join the upper end of a single beam 43 located at the longitudinal center of the horizontal truss structure 4 to the upper chord 40. As described above, the upper chord member 40 is composed of a pair of lip channel steels, and the upper part of the first gusset plate 45A is sandwiched and fixed between the webs W of the two lip channel steels. That is, the two lip channel steels are joined and fixed with multiple drill screws DS, with the first gusset plate 45A sandwiched between their respective webs W. Furthermore, the two lip channel steels are joined and fixed with multiple drill screws DS, with a clamping plate 46 sandwiched between them. Unlike the upper chord 40, the central beam 43 is made of a single lip channel steel and is therefore fixed to one side of the first gusset plate 45A. In other words, the web W of the single lip channel steel is joined and fixed to one side of the first gusset plate 45A by a plurality of drill screws DS. 4(a) is a front view of the upper chord 40, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the first gusset plate 45A and the clamping plate 46. FIG. 4(b) is a cross-sectional view of the portion where the clamping plate 46 is sandwiched, FIG. 4(c) is a cross-sectional view of the portion where the first gusset plate 45A is sandwiched, and FIG. 4(d) is a cross-sectional view of the central beam 43.

[0061] As shown in Figures 3 and 5, the second gusset plate 45B is a steel plate used to join the lower end of a beam 43, the lower chord 41, and two diagonal members 44 located at the longitudinal center of the horizontal truss structure 4. As described above, the lower chord 41 is made up of a pair of lip channel steels, and the lower part of the second gusset plate 45B is fixed by being sandwiched between the webs W of the two lip channel steels. That is, the two lip channel steels are joined and fixed by a plurality of drill screws DS with the second gusset plate 45B sandwiched between their respective webs W. Unlike the lower chord 41, the central beam 43 and the two diagonal beams 44 are made up of a single lip channel steel, and are therefore fixed to one side of the second gusset plate 45B. In other words, the web W of the single lip channel steel that makes up the central beam 43 and the two diagonal beams 44 is joined and fixed to one side of the second gusset plate 45B with a plurality of drill screws DS. 5(a) is a front view of the lower chord 41, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the second gusset plate 45B. FIG. 5(b) is a cross-sectional view of the portion where the second gusset plate 45B is sandwiched, and FIG. 5(c) is a cross-sectional view of the diagonal member 44.

[0062] As shown in Figures 3 and 6, the third gusset plate 45C is a steel plate used to join the upper end of the strut 43 located in the middle of the horizontal truss structure 4 in the longitudinal direction (the part located between the central strut 43 and one end strut 42), the upper chord 40, and one diagonal member 44. The upper part of the third gusset plate 45C is sandwiched between the webs W of the two lip channel steels that make up the upper chord 40 and is joined and fixed with multiple drill screws DS. Furthermore, the two lip channel steels are joined and fixed with multiple drill screws DS with a clamping plate 46 sandwiched between them. Unlike the upper chord 40, the beam 43 and the diagonal member 44 are constructed from a single lip channel steel, and are therefore joined and fixed to one side of the third gusset plate 45C by a plurality of drill screws DS. 6(a) is a front view of the upper chord 40, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the third gusset plate 45C and the clamping plate 46. FIG. 6(b) is a cross-sectional view of the portion where the third gusset plate 45C is clamped, and FIG. 6(c) is a cross-sectional view of the beam 43.

[0063] As shown in Figures 3 and 7, the fourth gusset plate 45D is a steel plate used to join the lower end of the strut 43, the lower chord 41, and one diagonal member 44 located in the middle longitudinal portion of the horizontal truss structure 4 (the portion located between the central strut 43 and one end strut 42). The lower part of the fourth gusset plate 45D is sandwiched between the webs W of the two lip channel steels that make up the lower chord 41 and is joined and fixed with multiple drill screws DS. Furthermore, the two lip channel steels are joined and fixed with multiple drill screws DS with a sandwiching plate 46 sandwiched between them. Unlike the lower chord 41, the beam 43 and the diagonal member 44 are constructed from a single lip channel steel, and are therefore joined and fixed to one side of the fourth gusset plate 45D by a plurality of drill screws DS. 7(a) is a front view of the lower chord 41, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the fourth gusset plate 45D and the clamping plate 46. FIG. 7(b) is a cross-sectional view of the portion where the fourth gusset plate 45D is clamped, and FIG. 7(c) is a cross-sectional view of the diagonal member 44.

[0064] 3 and 8, the fifth gusset plate 45E is a steel plate used to join the upper end of the end strut 42 arranged at the other longitudinal end of the horizontal truss frame 4, the upper chord 40, and the diagonal member 44. Here, as described above, the other longitudinal end of the upper chord 40 protrudes to the side (outside in the north-south direction) beyond the end strut 42. Therefore, the upper part of the fifth gusset plate 5E is also formed to protrude by the amount of the protruding-side end 40a. The upper part of the fifth gusset plate 45E is sandwiched between the webs W of the two lip channel steels that make up the upper chord member 40, and is joined and fixed by a plurality of drill screws DS. Unlike the upper chord 40, the end beam 42 and the diagonal beam 44 are constructed from a single lip channel steel, and are therefore joined and fixed to one side of the fifth gusset plate 45E by multiple drill screws DS. 8(a) is a front view of the upper chord member 40, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the fifth gusset plate 45E. Also, FIG. 8(b) is a cross-sectional view of the portion where the fifth gusset plate 45E is sandwiched between the pair of lip channel steels.

[0065] As described above, the horizontal truss frame 4 is provided to span between the upper ends of the first and second shear walls 21 and 22, which are two shear walls spaced apart in the north-south direction. More specifically, the protruding end portions 40a formed at both longitudinal ends of the upper chord 40 are placed on the upper ends of the first and second shear walls 21 and 22, respectively, thereby bridging the upper ends of the first and second shear walls 21 and 22. FIG. 8 is a front view showing the state in which the protruding end portion 40a formed at the other longitudinal end of the upper chord 40 is placed on the upper end of the second shear wall 22. FIG. 9 is a side view showing the state in which the protruding end portion 40a of the other longitudinal end of the upper chord 40 is placed on the upper end of the second shear wall 22. FIG. 10 is a plan view showing the state in which the protruding end portion 40a of the other longitudinal end of the upper chord 40 is placed on the upper end of the second shear wall 22. The protruding side end 40a formed at one longitudinal end of the upper chord 40 will also be placed on the upper end of the first shear wall 21, just like the protruding side end 40a at the other longitudinal end.

[0066] To explain in more detail the fit between the protruding end 40a formed at the other longitudinal end of the upper chord 40 and the second bearing wall 22, the second bearing wall 22 is constructed from an architectural wall panel and has core members 22a, 22b made of frame members or auxiliary beam members. That is, the second bearing wall 22 has one core member 22a extending in the up-down direction (vertical direction), and the other core member 22b connected to the upper end of this one core member 22a and arranged in a direction perpendicular to the one core member 22a (horizontal direction). On the other hand, the upper chord member 40 is composed of a pair of lip channel steel members, as described above. Therefore, as shown in Figure 9, the webs W of the upper chord member 40 are arranged adjacent to each other and are joined and fixed with drill screws DS, leaving an open state facing outward. The protruding end portion 40a is fixed by inserting a drill screw DS into the open portion that opens outward, and by using this drill screw DS to join the lower flange F to the other core member 22b of the second bearing wall 22. It should be noted that the lower flange F of the protruding end portion 40a, which is fixed to the second bearing wall 22, is provided with a plurality of through holes formed in advance to allow the drill screws DS to be passed through. The protruding dimension of the protruding-side end portion 40a is set to be approximately equal to the thickness dimension of the second bearing wall 22, as shown in FIGS.

[0067] When the upper chord 40 is placed on the upper end surface of the second bearing wall 22, a step corresponding to the upper chord 40 is created on the upper end surface of the second bearing wall 22. Therefore, as shown in FIG. 10 , a support metal fitting 8 is provided on the upper end surface of the second bearing wall 22. For example, a lip channel steel having the same cross-sectional shape as the lip channel steel constituting the upper chord 40 is used as this support metal fitting 8. Therefore, the height position of the top surface of the support metal fitting 8 is the same as the height position of the top surface of the upper chord 40. The fixing crosspieces 7 (described later) are provided on the top surface of such support metal fitting 8, similar to the top surface of the upper chord 40 of the horizontal truss frame 4. As a result, when wooden building materials (e.g., architectural roof panels P, sheathing boards, etc.) are placed on the horizontal truss frame 4, the horizontal truss frame 4 and the support metal fitting 8 can stably support the wooden building materials. Since the receiving hardware 8 is made of lip channel steel, it can be joined and fixed to the upper end surface of the second load-bearing wall 22 with drill screws DS. The material that makes up the receiving hardware 8 is not limited to steel, and wood or other materials can also be used. In such cases, it will not be called receiving hardware 8, but will be called "receiving piece (8)" or "receiving part (8)".

[0068] The sixth gusset plate 45F is a steel plate used to join the lower end of the end beam 42 arranged at the other longitudinal end of the horizontal truss structure 4 and the lower chord 41, as shown in Figures 3 and 11. The lower part of the sixth gusset plate 45F is sandwiched between the webs W of the two lip channel steels that make up the lower chord 41, and is joined and fixed by a plurality of drill screws DS. Unlike the lower chord member 41, the end member 42 is composed of a single lip channel steel, and is therefore joined and fixed to one side of the sixth gusset plate 45F by a plurality of drill screws DS. 11(a) is a front view of the lower chord 41, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the sixth gusset plate 45F. Also, FIG. 11(b) is a cross-sectional view of the portion where the sixth gusset plate 45F is sandwiched between the pair of lip channel steels.

[0069] The lower end of the horizontal truss structure 4 is supported by a support metal fitting 10 fixed to two load-bearing walls, a first load-bearing wall 21 and a second load-bearing wall 22, which are spaced apart in the north-south direction, and is joined and fixed to the support metal fitting 10. The support metal fittings 10 are fixed to the first and second bearing walls 21 and 22 after the protruding side ends 40a formed at both longitudinal ends of the upper chord members 40 of the horizontal truss frame 4 are placed on the upper end surfaces of the first and second bearing walls 21 and 22. In other words, the horizontal truss frame 4 is first installed, and then the support metal fittings 10 can be fixed to the first and second bearing walls 21 and 22 later. Such a support metal fitting 10 includes a fixing portion 11 and a support portion 12, as shown in FIG.

[0070] The fixed portion 11 is a portion that is fixed to the first bearing wall 21 and the second bearing wall 22, and has a fixed plate portion 11a and a reinforcing plate portion 11b. The fixed portion 11 is integrally formed by processing a single steel plate, and a bent portion is formed between the fixed plate portion 11a and the reinforcing plate portion 11b.

[0071] The fixing plate portion 11a is a plate portion that forms the surface that contacts the wall surfaces of the first bearing wall 21 and the second bearing wall 22, and as shown in Fig. 12(a), has a plurality of through holes formed therein through which lag screw bolts LB, which are fixing devices, are passed. In other words, the support metal fitting 10 itself is fixed to the wall surfaces of the first bearing wall 21 and the second bearing wall 22 by fastening the fixing plate portion 11a with the lag screw bolts LB, which are fixing devices. The lag screw bolts LB are fastened to one of the core materials 22a of the first bearing wall 21 and the second bearing wall 22.

[0072] The reinforcing plate portions 11b are formed integrally with both widthwise end portions of the fixing plate portion 11a and are plate portions that protrude on the side opposite to the surface that contacts the first bearing wall 21 and the second bearing wall 22. These reinforcing plate portions 11b are arranged perpendicular to the fixing plate portion 11a in a plan view. The reinforcing plate portions 11b are formed integrally with and arranged perpendicular to the fixing plate portion 11a, and are also arranged perpendicular to the support plate portion 12a of the support portion 12. These reinforcing plate portions 11b connect the fixing plate portion 11a and the support plate portion 12a. In other words, the reinforcing plate portions 11b serve as a means for reinforcing the entire support fitting 10.

[0073] The support portion 12 is a portion that comes into contact with the underside of the lower chord member 41 of the horizontal truss frame 4 and functions as a positioning portion (positioning means) for positioning the support hardware 10, and has a support plate portion 12a and a spring-up portion 12b. The support portion 12 is integrally formed by processing a single steel plate, and a bent portion is formed between the support plate portion 12a and the spring-up portion 12b.

[0074] The support plate portion 12a is welded to the upper ends of the fixing plate portion 11a and the reinforcing plate portion 11b of the fixing portion 11, and as shown in FIG. 12(c), has a plurality of through holes through which drill screws DS are passed. These through holes are for passing drill screws DS to fasten the lower chord member 41, which is composed of a pair of lip channel steel. Therefore, the lower chord member 41 comes into contact with the support plate portion 12a, and functions as a part that supports the horizontal truss frame 4. The drill screws DS are installed facing upward from below. Therefore, the heads are located on the lower side, and the tips are housed inside the lip channel steel that constitutes the lower chord member 41.

[0075] The raised portions 12b are formed integrally with both widthwise ends of the support plate portion 12a and are raised portions that protrude on the side opposite the fixed portion 11. As described above, these raised portions 12b form bent portions between the support plate portion 12a. To explain in more detail, the bent portion between the support plate portion 12a and the raised portions 12b is processed to draw a gentle arc as shown in Figure 12(a), and is formed to fit the shape of the lip channel steel. To explain in more detail, the support hardware 10 is fixed to the first load-bearing wall 21 and the second load-bearing wall 22 after the horizontal truss structure 4 is spanned between the first load-bearing wall 21 and the second load-bearing wall 22, so the support hardware 10 itself is positioned by fitting the raised portion 12b of the support part 12 to the lower end surface of the lower chord member 41 (the shape of a lip channel steel). That is, after the support hardware 10 itself is positioned by the support part 12, the fixing part 11 is fixed to the first load-bearing wall 21 and the second load-bearing wall 22. Also, after the fixing part 11 is fixed, the lower flange F of the pair of lip channel steels that make up the lower chord 41 is joined and fixed to the support plate part 12a of the support part 12 by the drill screw DS.

[0076] The support metal fitting 10 can also be used upside down. In that case, the fixing plate portion 11a of the fixing portion 11 is shielded by the horizontal truss frame 4, so the support metal fitting 10 is fixed to the wall surfaces of the first bearing wall 21 and the second bearing wall 22 with drill screws DS before the horizontal truss frame 4 is fixed.

[0077] As described above, the horizontal truss frame 4 is installed relative to the first load-bearing wall 21 and the second load-bearing wall 22. As described above, a plurality of horizontal truss frames 4 are arranged at intervals in the east-west direction, and a plurality of horizontal stiffeners 6 are provided to span between the lower chords 41 of these horizontal truss frames 4. Furthermore, on the upper surface of the upper chord member 40 of the horizontal truss frame 4, a fixing crosspiece 7 formed long along the length direction of the upper chord member 40 is provided.

[0078] The horizontal stiffeners 6 are installed between multiple horizontal truss structures 4, connecting the multiple horizontal truss structures 4 and reinforcing the entire roof support structure, and in this embodiment, lip channel steel is used. In this embodiment, the multiple horizontal stiffeners 6 are bridged between the upper surfaces of the lower chords 41 of the multiple horizontal truss frames 4 and joined and fixed by welding or the like. However, this is not limited to this, and the horizontal stiffeners 6 may also be bridged between the lower surfaces of the upper chords 40 of the multiple horizontal truss frames 4.

[0079] As shown in Figures 4, 6, 8, and 9, the fixing crosspieces 7 are wooden crosspieces that can function as a base when joining and fixing wooden building materials (which refers to all building materials primarily made of wood, including structural materials, finishing materials, adjustment materials, auxiliary materials, etc.) onto the horizontal truss frame 4. In other words, the horizontal truss frame 4 is made of lightweight steel, and the fixing crosspieces 7 can be attached in advance as base materials when joining and fixing wooden building materials onto it. More specifically, the fixing crosspieces 7 are attached in advance to the top surfaces of the upper chord members 40, and the wooden building materials are fixed to these fixing crosspieces 7. This allows the wooden building materials to be easily and reliably attached and fixed to the horizontal truss frame 4, which is made of lightweight steel.

[0080] The fixing crosspiece 7 is formed long along the length of the upper chord 40, and is set to a length dimension approximately equal to that of the upper chord 40. However, the fixing crosspiece 7 is formed by connecting multiple crosspieces in the length direction to form a single fixing crosspiece 7. In other words, although the fixing crosspiece 7 is formed long along the length of the upper chord 40, it does not necessarily have to be made from a single piece of wood, and the fixing crosspiece 7 can be formed by connecting multiple pieces of wood, or can be placed only in the necessary positions.

[0081] The fixing crosspiece 7 itself is fixed to the upper chord member 40 by, for example, drill screws DS. That is, the fixing crosspiece 7 has a plurality of through holes through which the drill screws DS are passed, and a counterbore is formed on the upper surface to accommodate the head of the drill screw DS. Therefore, when the fixing crosspiece 7 is fixed to the upper flange F of the upper chord member 40 by the drill screws DS, the head of the drill screw DS does not protrude above the upper surface of the fixing crosspiece 7. Note that an adhesive may be used in addition to the fixation by the drill screws DS.

[0082] In this embodiment, fixing bars 7 are attached to the upper surfaces of the upper chord members 40 of the horizontal truss frame 4. As shown in FIG. 1, a plurality of support walls 13 for supporting the roof 3 are arranged in a row on top of the horizontal truss frame 4. The support wall 13 has a rectangular lower wall portion and a triangular slope adjustment portion integrally provided on the upper surface of the lower wall portion. Of the lower wall portion and slope adjustment portion, at least the lower wall portion is made of an architectural wood panel P, and this lower wall portion is fixed to the fixing crosspiece 7. In other words, the lower frame of the architectural wood panel P that makes up the lower wall portion is fixed to the fixing crosspiece 7.

[0083] In this embodiment, the plurality of support walls 13 are arranged side by side and adjacent to one another along the gradient direction of the first roof portion 3a and the gradient direction of part of the second roof portion 3b. In addition, girders 3c are bridged and connected between the opposing support walls 13 spaced apart in the east-west direction, and the girders 3c reinforce the multiple support walls 13 and stably support the roof 3.

[0084] (Details of the slope truss structure) FIG. 13 is a front view showing the gradient truss frame 5. As shown in FIG. As shown in Figures 13 to 15, the gradient truss structure 5 comprises a plurality of truss members, including an upper chord member 50, a lower chord member 51, two end struts 52 and two lower end connecting portions 52a, a plurality of struts 53, and a plurality of diagonal members 54, and further comprises a plurality of gusset plates 45A to 45D, 55A to 55D provided at the intersections (also called nodes) of each truss member 50 to 54, and a clamping plate 56. In addition, the upper chord member 50 and the lower chord member 51 are also called flange members in relation to the two end struts 52, the multiple struts 53 and the multiple diagonal members 54, and the two end struts 52, the multiple struts 53 and the multiple diagonal members 54 are also called web members (belt members) in relation to the upper chord member 50 and the lower chord member 51.

[0085] The members 50 to 54 constituting the gradient truss frame 5 are lip channel steel like the members 40 to 44 constituting the horizontal truss frame 4, and the multiple gusset plates 45A to 45D, 55A to 55D and sandwiching plates are also similarly made of steel plates. In particular, of the multiple gusset plates 45A to 45D, 55A to 55D, the multiple gusset plates 45A to 45D provided in the portions of the gradient truss frame 5 excluding both ends in the gradient direction are the same as the gusset plates 45A to 45D used in the horizontal truss frame 4.

[0086] Additionally, the upper chord members 50 made of lip channel steel are used in pairs, and these two upper chord members 50 are arranged back-to-back and are treated as a single upper chord member 50. In other words, the upper chord member 50 functions as an upper chord member 50 by arranging two lip channel steels with their webs W adjacent to each other and joining them with gusset plates 45, 55 interposed between the webs W. The lower chord 51, which is made of lip channel steel, is also used in pairs, just like the upper chord 50.

[0087] The upper chord member 50 is located at the top of the slope truss frame 5 and is a member that is mainly subjected to compressive forces. The inclination angle of the upper chord member 50 is set to the same inclination angle as the second roof section 3b located on the north side. Furthermore, in the case of the gradient truss frame 5, like the horizontal truss frame 4, the upper chord member 50 is formed to be longer than the lower chord member 51, and both longitudinal ends thereof protrude laterally (outside in the north-south direction) beyond both longitudinal ends of the lower chord member 51. In other words, the upper chord member 50 has, at both longitudinal ends thereof, a first protruding side end 50a and a second protruding side end 50b which protrude laterally (outside in the north-south direction) beyond the lower chord member 51. The first protruding side end 50a is a protruding side end located on the upper side in the gradient direction, and the second protruding side end 50b is a protruding side end located on the lower side in the gradient direction. Here, the upper chord member 50 refers to a pair of lip channel steel members, as described above.

[0088] Additionally, fixing crosspieces 7 for fixing wooden building materials to the slope truss frame 5 are attached to the upper surface of the upper chord member 50. The fixing crosspieces 7 are formed long along the length of the upper chord member 50, and are set to a length dimension approximately equal to that of the upper chord member 50.

[0089] The lower chord 51 in this embodiment is located at the bottom of the gradient truss structure 5 and is a member that is mainly subjected to tensile forces.It comprises a lower chord main body and an angle adjustment section 51a that is arranged at both longitudinal ends of the lower chord main body and has an end beam 52 arranged above it. The lower chord body is positioned below the upper chord 50 with a gap therebetween, and parallel or approximately parallel to the upper chord 50. In other words, the inclination angle of the lower chord body is set to the same inclination angle as the second roof section 3b located on the north side. The angle adjustment portion 51a is formed to be shorter than the lower chord member body. Its length is approximately equal to the short dimension of the end beam 52, as shown in Figure 15. Unlike the lower chord member body, the angle adjustment portion 51a is arranged horizontally. In other words, the lower chord member 51 is arranged with most of its lower chord member body parallel or approximately parallel to the upper chord member 50 and tilted at an angle, with both longitudinal ends arranged horizontally. Here, the lower chord 51 (lower chord main body, angle adjustment portion 51a) refers to a pair of lip channel steels, as described above. In this embodiment, the lower chord main body and angle adjustment portion 51a are connected via a ninth gusset plate 55C and a tenth gusset plate 55D, which will be described later.

[0090] The end beams 52 are vertical members of the gradient truss frame 5 that connect the upper chord 50 and the lower chord 51 to transmit axial force, and are located at both longitudinal ends of the gradient truss frame 5. More specifically, they are provided to bridge between the portions immediately before the protruding-side ends 40a at both longitudinal ends of the upper chord 50 and the angle adjustment portions 51a of the lower chord 51, thereby connecting the upper chord 50 and the lower chord 51. Therefore, the first protruding-side end 50a and the second protruding-side end 50b of the upper chord 50 protrude further in both directions than the end beams 52.

[0091] The struts 53 are vertical members that connect the upper chords 50 and lower chords 51 of the gradient truss frame 5 to transmit axial force, and refer to the multiple struts 53 that are provided in the gradient truss frame 5 at positions other than the end struts 52. These multiple struts 53 include one strut 53 located in the center of the gradient truss frame 5 in the longitudinal direction, and multiple struts 53 provided between the one strut 53 and the end struts 52. These multiple beam members 53 are arranged at equal intervals between the parallel or nearly parallel upper chord member 50 and lower chord member 51. In addition, the multiple beam members 53 are perpendicular to the upper chord member 50 and lower chord member 51 when viewed from the front, but the end beam members 52 are vertical and not perpendicular to the upper chord member 50 and lower chord member 51. Therefore, the intervals between the multiple beam members 53 and the end beam members 52 are not equal.

[0092] The diagonal members 54 are members of the gradient truss frame 5 that are spanned diagonally from the upper chord member 50 to the lower chord member 51, and serve to distribute external forces when applied to the gradient truss frame 5. In this embodiment, the multiple diagonal members 54 are attached so that their attachment orientations are diametrically opposite at one end and the other end of the gradient truss frame 5 in the longitudinal direction, with the central beam member 53 as the boundary. That is, the diagonal members 54 span diagonally from the upper end of the end beam member 52 to the lower end of the beam member 53 arranged adjacent to the end beam member 52. With the central beam member 53 as the boundary, all of the diagonal members 54 arranged at one end of the longitudinal direction are arranged in the same direction, and all of the diagonal members 54 arranged at the other end of the longitudinal direction are arranged in the same direction.

[0093] As shown in Figures 4 to 7, 14, and 15, the multiple gusset plates 45A to 45D, 55A to 55D are steel plates used to join the members 50 to 54 at the nodes of the gradient truss frame 5. The shapes of these multiple gusset plates 45A to 45D, 55A to 55D vary depending on where they are placed, and are shaped to reliably cover the joints of the members 50 to 54. The pair of lip channel steels that make up the upper chord member 50 and the lower chord member 51 sandwich the multiple gusset plates 45A to 45D, 55A to 45D. The multiple gusset plates 45A to 45D, 55A to 45D include a first gusset plate 45A, a second gusset plate 45B, a third gusset plate 45C, a fourth gusset plate 45D, a seventh gusset plate 55A, an eighth gusset plate 55B, a ninth gusset plate 55C, and a tenth gusset plate 55D.

[0094] The sandwiching plate 56 is a steel plate sandwiched between a pair of lip channel steels that make up the upper chord member 50 and the lower chord member 51, and is set to the same thickness as the multiple gusset plates 45A-45D, 55A-55D. Its use is similar to the sandwiching plate 46 in the horizontal truss frame 4. In other words, by sandwiching the sandwiching plate 56 between a pair of lip channel steels that make up the upper chord member 50 and the lower chord member 51 and then joining and fixing them, the upper chord member 50 and the lower chord member 51 are less likely to flex, and as a result, the rigidity of the upper chord member 40 and the lower chord member 41 can be improved.

[0095] Next, a detailed description will be given of the configuration of each of the gusset plates 45A to 45D, 55A to 45D. Among the multiple gusset plates 45A to 45D, 55A to 45D, the first gusset plate 45A, the second gusset plate 45B, the third gusset plate 45C, and the fourth gusset plate 45D have the same configuration and attachment method as the first to fourth gusset plates 45A to 45D in the horizontal truss frame 4, and therefore descriptions thereof will be omitted.

[0096] 13 and 14(a), the seventh gusset plate 55A is a steel plate used to join the upper end of the end strut 52 arranged at one longitudinal end of the gradient truss frame 5, the upper chord 50, and the diagonal member 54. Here, one longitudinal end of the upper chord 50 protrudes laterally (outside in the north-south direction) beyond the end strut 52 as described above, and has a first protruding side end 50a. Therefore, the upper part of the seventh gusset plate 55A is also formed to protrude by the amount of the first protruding side end 50a. The upper part of the seventh gusset plate 55A is sandwiched between the webs W of the pair of lip channel steels that make up the upper chord member 50, and is joined and fixed by a plurality of drill screws DS. Unlike the upper chord member 50, the end beam member 52 and the diagonal member 54 are constructed from a single lip channel steel, and are therefore joined and fixed to one side of the seventh gusset plate 55A by multiple drill screws DS.

[0097] 13 and 14(b), the eighth gusset plate 55B is a steel plate used to join the upper end of the end strut 52 arranged at the other longitudinal end of the gradient truss frame 5, the upper chord 50, and the diagonal member 54. Here, the other longitudinal end of the upper chord 50 protrudes laterally (outside in the north-south direction) beyond the end strut 52 as described above, and has a second protruding side end 50b. Therefore, the upper part of the eighth gusset plate 55B is also formed to protrude by the amount of the second protruding side end 50b. The upper part of the eighth gusset plate 55B is sandwiched between the webs W of the pair of lip channel steels that make up the upper chord member 50, and is joined and fixed by a plurality of drill screws DS. Unlike the upper chord member 50, the end beam member 52 and the diagonal member 54 are constructed from a single lip channel steel, and are therefore joined and fixed to one side of the eighth gusset plate 55B by multiple drill screws DS.

[0098] 14(a) and (b) are front views of the upper chord member 50, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the seventh gusset plate 55A and the eighth gusset plate 55B. Also, FIG. 14(c) is a cross-sectional view of the portion where the seventh gusset plate 55A or the eighth gusset plate 55B is sandwiched between the pair of lip channel steels. FIGS. 14(d) and (e) are cross-sectional views of the end beam 52.

[0099] As described above, the gradient truss frame 5 is provided to span between the upper ends of the third bearing wall 23 and the fourth bearing wall 24, which are two bearing walls spaced apart in the north-south direction. More specifically, the first protruding side end 50a and the second protruding side end 50b formed at both longitudinal ends of the upper chord member 50 are placed on the upper ends of the third bearing wall 23 and the fourth bearing wall 24, respectively, so that the gradient truss frame 5 is provided to span between the upper ends of the third bearing wall 23 and the fourth bearing wall 24.

[0100] We will now explain in more detail the fit between the first protruding side end 50a formed at one longitudinal end of the upper chord 50 and the third shear wall 23, and the fit between the second protruding side end 50b formed at the other longitudinal end of the upper chord 50 and the fourth shear wall 24. First, the third bearing wall 23 is constructed from architectural wall panels and includes core members 23a, 23b made of frame members or auxiliary beam members. That is, the third bearing wall 23 has one core member 23a extending in the up-down direction (vertical direction), and the other core member 23b connected to the upper end of the one core member 23a and arranged in a direction perpendicular to the one core member 23a (horizontal direction). Furthermore, on the upper end surface of the other core member 23b, at a position where the first protruding side end 50a of the upper chord member 50 is placed, a slope adjustment member 23c is provided to position the upper chord member 50 at a predetermined angle. The fourth bearing wall 24 is also composed of architectural wall panels, and has one core member 24a extending in the up-down direction (vertical direction), and the other core member 24b connected to the upper end of this one core member 24a and arranged in a direction perpendicular to the one core member 24a (horizontal direction). In addition, on the upper end surface of the other core member 24b, at the position where the second protruding side end 50b of the upper chord member 50 is placed, a slope adjustment member 24c is provided to position the upper chord member 50 at a predetermined angle. If the slope of the roof 3 is gentle, the slope adjusters 23c and 24c may be omitted. Furthermore, the third bearing wall 23 and the fourth bearing wall 24 do not necessarily need to be perpendicular to the upper chord 50, as long as slope adjusters are provided at their ends.

[0101] On the other hand, the upper chord member 50 is composed of a pair of lip channel steel beams, as described above. Therefore, as shown in Figure 14(c), the webs W of the upper chord member 50 are arranged adjacent to each other and are joined and fixed with drill screws DS, leaving an open state facing outward. The first protruding side end portion 50a and the second protruding side end portion 50b are fixed by inserting drill screws DS into the open portions that open outward, and by using these drill screws DS to join the lower flanges F to the other core members 23b, 24b of the third shear wall 23 and the fourth shear wall 24 via the slope adjustment members 23c, 24c. The protruding dimensions of the first protruding side end portion 50a and the second protruding side end portion 50b are set to be approximately equal to the thickness dimensions of the third bearing wall 23 and the fourth bearing wall 24, as shown in Figures 13 and 14.

[0102] Furthermore, when the slope adjusting members 23c, 24c and the upper chord member 50 are placed on the upper end surfaces of the third shear wall 23 and the fourth shear wall 24, a corresponding step is created on the upper end surfaces of the third shear wall 23 and the fourth shear wall 24. Therefore, although not shown, the above-mentioned receiving metal fittings 8 are provided on the upper end surfaces of the third shear wall 23 and the fourth shear wall 24. In addition, in order to make the height position and angle of the upper surface of the support metal fittings 8 equal to the height position and angle of the upper surface of the upper chord member 50, slope adjustment members 23c, 24c may be attached along the longitudinal direction of the upper end surfaces of the third shear wall 23 and the fourth shear wall 24, and the support metal fittings 8 may be provided for these slope adjustment members 23c, 24c.

[0103] As shown in Figures 13 and 15(a), the ninth gusset plate 55C is a steel plate used to join the lower end of the end beam 52 arranged at one longitudinal end of the gradient truss frame 5, the angle adjustment portion 51a of the lower chord 51, and the lower chord body. The lower part of the ninth gusset plate 55C is sandwiched between the webs W of the two lip channel steels that make up the angle adjustment part 51a of the lower chord 51 and the lower chord body, and is joined and fixed with multiple drill screws DS. The lower chord body and the angle adjustment part 51a are at different angles, but they are fixed in place by the ninth gusset plate 55C and drill screws DS, and this state is maintained. Unlike the lower chord member 51, the end member 52 is composed of a single lip channel steel, and is therefore joined and fixed to one side of the ninth gusset plate 55C by a plurality of drill screws DS.

[0104] The tenth gusset plate 55D is a steel plate used to join the lower end of the end beam 52 arranged at the other longitudinal end of the gradient truss structure 5, the angle adjustment portion 51a of the lower chord 51, and the lower chord body, as shown in Figures 13 and 15(b). The lower part of the tenth gusset plate 55D is sandwiched between the webs W of the two lip channel steels that make up the angle adjustment part 51a of the lower chord 51 and the lower chord body, and is joined and fixed with multiple drill screws DS. The lower chord body and the angle adjustment part 51a are at different angles, but they are fixed in place by the tenth gusset plate 55D and drill screws DS, and this state is maintained. Unlike the lower chord member 51, the end member 52 is composed of a single lip channel steel, and is therefore joined and fixed to one side of the tenth gusset plate 55D by a plurality of drill screws DS.

[0105] 15(a) and (b) are front views of the lower chord 51, which is made up of a pair of lip channel steels, with one lip channel steel omitted to reveal the ninth gusset plate 55C and the tenth gusset plate 55D. Also, Fig. 15(c) is a cross-sectional view of the portion where the ninth gusset plate 55C or the tenth gusset plate 55D is sandwiched between the pair of lip channel steels.

[0106] The lower end of the gradient truss structure 5 is supported by a support metal fitting 10 fixed to two shear walls, the third shear wall 23 and the fourth shear wall 24, which are spaced apart in the north-south direction, and is joined and fixed to the support metal fitting 10. The support hardware 10 is configured so that the first protruding side end 50a and the second protruding side end 50b formed at both longitudinal ends of the upper chord member 50 of the gradient truss frame 5 are placed on the upper end surfaces of the third shear wall 23 and the fourth shear wall 24, respectively, and then fixed to each of the third shear wall 23 and the fourth shear wall 24. The configuration of the support metal fitting 10 is as described above, and its description will be omitted.

[0107] To explain in more detail, the support fitting 10 is fixed to the third shear wall 23 and the fourth shear wall 24 after the slope truss structure 5 is spanned between the third shear wall 23 and the fourth shear wall 24, so the support fitting 10 itself is positioned by fitting the raised portion 12b of the support part 12 of the support fitting 10 to the lower end surface of the angle adjustment part 51a (shape of lip channel steel) of the lower chord member 51. After the support hardware 10 itself has been positioned by the support part 12, the fixing part 11 is fixed to the third bearing wall 23 and the fourth bearing wall 24 with lag screw bolts LB. Also, after the fixing part 11 is fixed, the lower flange F of the pair of lip channel steels that make up the angle adjustment part 51a of the lower chord 51 is joined and fixed to the support plate part 12a of the support part 12 with drill screws DS.

[0108] An architectural roof panel P that constitutes the second roof portion 3b of the roof 3 is fixed to the fixing crosspiece 7 attached to the upper surface of the upper chord member 50 (see FIG. 16). Multiple architectural roof panels P are used to form the second roof portion 3b, and are arranged adjacent to each other on the top surface of the fixing crosspieces 7, and the frames of adjacent architectural roof panels P are fixed to the fixing crosspieces 7 by screwing them together (adhesive can also be used in combination). In this embodiment, an architectural roof panel P is used as the wooden building material fixed to the fixing crosspiece 7, but this is not limited to this and a sheathing board on which a roof finishing material is provided may also be used.

[0109] In the horizontal truss frame 4 and the gradient truss frame 5 constructed as described above, the protruding end portions 40a, 50a, 50b of the respective upper chord members 40, 50 are bridged between the upper ends of two shear walls (the first shear wall 21 and the second shear wall 22, and the third shear wall 23 and the fourth shear wall 24) spaced apart in the north-south direction. The lower chord members 41, 51 of the horizontal truss frame 4 and the gradient truss frame 5 are positioned and supported by support hardware 10. A plurality of such horizontal truss frames 4 and gradient truss frames 5 are arranged at intervals in the east-west direction, and the plurality of horizontal truss frames 4 and the plurality of gradient truss frames 5 are connected at least by horizontal stiffeners 6, thereby forming a roof support structure.

[0110] [Modification] It should be noted that the embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. Modifications will be described below. The following modifications may be combined as much as possible. In each of the following modifications, elements common to the above-described embodiments will be assigned the same reference numerals, and descriptions thereof will be omitted or simplified.

[0111] [Variation 1]

[0112] In the above embodiment, a plurality of horizontal truss frames 4 and a plurality of gradient truss frames 5 are arranged at intervals in the east-west direction. A more detailed description will be given using a horizontal truss frame 4 as an example. The horizontal truss frame 4 in the above embodiment is configured with an upper chord member 40 and a lower chord member 41 each formed by a pair of lip channel steel members, an end strut member 42, strut member 43, and diagonal member 44 each formed by a single lip channel steel member, a plurality of gusset plates 45A-45F for joining these members 40-44, and a clamping plate 46. If such a horizontal truss frame 4 is counted as "one row," in the above embodiment, multiple "rows" of horizontal truss frames 4 are arranged, one row at a time, at intervals in the east-west direction. In contrast, in this modified example, as shown in Fig. 16, two sets of horizontal truss frames 4 are arranged in multiple "rows" spaced apart in the east-west direction. In other words, in this modified example, a double arrangement of horizontal truss frames 4 is used. In contrast, the arrangement of the horizontal truss frames 4 in the above embodiment is referred to as a single arrangement.

[0113] The double-arranged horizontal truss structure 4 may be integrated by joining the upper chords 40 and / or the lower chords 41 together by welding or the like, or by connecting them with connecting members not shown. Furthermore, double-arranged horizontal truss frames 4 may be arranged with a slight gap between them if the upper chords 40 and / or the lower chords 41 are not joined by welding or the like. In other words, if the upper chords 40 and / or the lower chords 41 are connected to each other by a connecting member (not shown), for example, or if the horizontal truss frames 4 are simply arranged side by side in two rows, a slight gap may be formed between one horizontal truss frame 4 and the other horizontal truss frame 4.

[0114] Figure 16 is a cross-sectional view of a double-arranged horizontal truss structure 4, showing the upper chord 40, the lower chord 41, the stringer 43 arranged in the middle of the length (the part located between the central stringer 43 and one of the end stringer 42), the third gusset plate 45C, and the fourth gusset plate 45D.

[0115] The upper part of the third gusset plate 45C is sandwiched between the webs W of the two lip channel steels that make up the upper chord member 40 and is joined and fixed with multiple drill screws DS. In the case of a double arrangement, two third gusset plates 45C are also installed parallel and facing each other. Therefore, the heads of the multiple drill screws DS are installed so that they face outward. This prevents the tips of the multiple drill screws DS used to secure the third gusset plate 45C from being exposed, improving not only the appearance but also safety.

[0116] Similarly, the lower part of the fourth gusset plate 45D is sandwiched between the webs W of the two lip channel steels that make up the lower chord 41 and is joined and fixed with a plurality of drill screws DS. Therefore, in the case of a double arrangement, the tips of the plurality of drill screws DS used to fix the fourth gusset plate 45D are not exposed, which improves appearance and safety.

[0117] In this modified example, fixing crosspieces 7 to which wooden building materials are fixed are attached to the upper surface of the double-arranged horizontal truss frame 4. Architectural roof panels P are fixed as wooden building materials to the fixing crosspieces 7. Multiple architectural roof panels P are used, and are arranged adjacent to each other on the upper surface of the fixing crosspieces 7, with the frames of adjacent architectural roof panels P being fixed to the fixing crosspieces 7 by screws (adhesive can also be used in combination).

[0118] Furthermore, regardless of whether the double-arranged horizontal truss frames 4, 4 are integrated by joining or connecting or not, as long as they are arranged in close proximity to one another and can be treated as a set of truss frames structurally for the building 1, there will be no doubt as to their difference from a plurality of single-arranged horizontal truss frames 4 arranged at intervals in the east-west direction. In short, for example, as described above, if the fixing crosspiece 7 is provided across the top surface of the first row of horizontal truss frames 4 and the top surface of the second row of horizontal truss frames 4, 4, it will be easy to determine that the first and second rows of horizontal truss frames 4, 4 are a set of truss frames structurally for the building 1.

[0119] It goes without saying that the above-described double arrangement can be performed not only on the horizontal truss frame 4 but also on the gradient truss frame 5 in the same manner. Furthermore, a single building 1 may have a mixture of locations where the horizontal truss frame 4 or the gradient truss frame 5 is double-arranged and locations where it is single-arranged. In other words, whether the horizontal truss frame 4 or the gradient truss frame 5 is double-arranged or single-arranged can be changed as appropriate depending on the shape, structure, etc. of the roof 3 supported by the horizontal truss frame 4 or the gradient truss frame 5.

[0120] [Variation 2] When a gap is formed between one horizontal truss structure 4 and the other horizontal truss structure 4 in a double arrangement, two of the support fittings 10 described in the above embodiment can be used side by side, as shown in Figure 17. The gap is set to a width that allows the other flip-up portion 12b of the support portion 12 in one support fitting 10 and one flip-up portion 12b of the support portion 12 in the other support fitting 10 to be inserted simultaneously.

[0121] When one horizontal truss frame 4 and the other horizontal truss frame 4 in a double arrangement are supported by two support fittings 10, the raised portion 12b of the support part 12 of both support fittings 10 is fitted to the lower end surface of the lower chord member 41 (in the shape of a lip channel steel), and the support fittings 10 themselves are positioned by the support part 12. Thereafter, the fixing portion 11 is fixed to the first bearing wall 21 and the second bearing wall 22 by the lag screw bolts LB. After the fixing portion 11 is fixed, the lower flange F of the pair of lip channel steels that make up the lower chord 41 is joined and fixed to the support plate portion 12a of the support portion 12 using drill screws DS. In this way, one horizontal truss frame 4 and the other horizontal truss frame 4 in a double arrangement can be supported by two support metal fittings 10.

[0122] In addition, if no gap is formed between one horizontal truss structure 4 and the other horizontal truss structure 4 in a double arrangement, it is desirable to integrate the support parts 12 of the two support fittings 10. That is, the adjacent raised portions 12b of the support portions 12 of the two support fittings 10 shown in Figure 17 are omitted, and the support plate portions 12a are formed integrally with each other. Here, the width dimension of the integrally formed support plate portions 12a is set to be approximately equal to the width dimension of the lower chord members 41, 41 that are arranged side by side with no gaps, and the raised portions 12b on both sides fit into the outer lip portions L of the two lower chord members 41, 41. Furthermore, when the support portions 12 (support plate portions 12a) are integrally formed in this manner, the spacing between the support fittings 10 is reduced, so the fixing portions 11 may also be integrally formed. In this case, the adjacent reinforcing plate portions 11b of the fixing portion 11 may be omitted, and the fixing plate portions 11a may be integrally formed.

[0123] It goes without saying that the above-described double arrangement can be performed not only on the horizontal truss frame 4 but also on the gradient truss frame 5 in a similar manner. Therefore, there is no obstacle in applying this modified example in which two support metal fittings 10 are used side by side to the double-arranged gradient truss frame 5. In other words, when one double-arranged gradient truss frame 5 and the other double-arranged gradient truss frame 5 are supported by two support metal fittings 10, the raised portion 12b of the support part 12 of both support metal fittings 10 is fitted to the lower end surface of the bottom chord member 51 (shaped like a lip channel steel), and the support metal fittings 10 themselves are positioned by the support part 12. Thereafter, the fixing portion 11 is fixed to the first bearing wall 23 and the second bearing wall 24 by the lag screw bolts LB. After the fixing portion 11 is fixed, the lower flange F of the pair of lip channel steels that make up the lower chord member 51 is joined and fixed to the support plate portion 12a of the support portion 12 using drill screws DS. In this way, one gradient truss frame 5 and the other gradient truss frame 5 in a double arrangement can be supported by two support metal fittings 10.

[0124] The above-disclosed embodiments have been made for the purpose of illustration and example only, and are not intended to limit the scope of the present invention, which should be interpreted by the terms of the claims.

[0125] [Variation 3] In the above embodiment, the horizontal truss structure 4 and the gradient truss structure 5 are arranged to span between the upper ends of two load-bearing walls (first load-bearing wall 21 and second load-bearing wall 22, third load-bearing wall 23 and fourth load-bearing wall 24) spaced apart in the north-south direction, but in this modified example, the horizontal truss structure 4 and the gradient truss structure 5 are arranged to span between the upper ends of two cross members spaced apart from each other. Here, the cross members refer to those provided as structural frameworks that support the building 1, specifically beams, girders, etc. In other words, the horizontal truss frame 4 and the gradient truss frame 5 are provided to span between the upper end faces of two cross members such as beams and girders that are spaced apart from each other.

[0126] [Variation 4] In the above embodiment, a fixing batten 7 is attached to the upper surface of the upper chord member, and the wooden building material is fixed to this fixing batten 7, but in this modified example, the wooden building material is fixed directly to the upper surface of the upper chord member. The wooden building material of this modified example is a surface material that functions as a floor board material for the attic space formed below the roof 3.

[0127] The upper chord member of this modified example is the upper chord member 40 of the horizontal truss frame 4. The wooden construction surface material is made of structural plywood, and is installed between multiple horizontal truss structures 4, connecting the multiple horizontal truss structures 4 and reinforcing the entire roof support structure. When the surface material is installed as a flooring material for an attic space, as in this modified example, a floor finishing material may be installed on the upper surface of the surface material. The multiple panel members are then spanned between the upper surfaces of the upper chord members 40 of the multiple horizontal truss structures 4 and fixed to the upper surfaces of the upper chord members 40 and the upper surfaces of the support fittings 8, for example, by drill screws DS.

[0128] The wooden building material in this modified example is a surface material that functions as a floor board material for the attic space as described above, but is not limited to this and may also be, for example, a sheathing board that forms the roof underlayment of the roof 3. [Explanation of symbols]

[0129] 1. Building 2. Main building 21 First load-bearing wall 22 Second load-bearing wall 22a One of the core materials 22b Other core material 23 Third load-bearing wall 23a One of the core materials 23b Other core material 24 Fourth load-bearing wall 24a One of the core materials 24b Other core material 3. Roof 3a First roof section 3b Second roof section 4 Horizontal truss frame 40 Top chord 40a Projecting end 41 Lower chord 42 End bundle material 43 Bundle material 44 Diagonal 45A First Gusset Plate 45B Second gusset plate 45C Third gusset plate 45D Fourth gusset plate 45E Fifth gusset plate 45F 6th gusset plate 46 Clamp 5. Gradient truss structure 50 Top chord 50a First protruding end 50b Second protruding end 51 Lower chord 51a Angle adjustment part 52 End bundle material 53 Bundle material 54 Diagonal 55A Seventh gusset plate 55B Eighth gusset plate 55C 9th gusset plate 55D 10th Gusset Plate 56 Clamp 6 Lateral stiffener 7 Fixing crosspiece 8 Support hardware 10 Support hardware 11 Fixed part 11a Fixed plate part 11b Reinforcement plate 12 Support part 12a Support plate part 12b Flip-up section 13 Supporting wall W Web F flange L Lip DS Self-Drilling Screws LB Lag Screw Bolt

Claims

1. A steel truss frame support structure that is installed between two structures spaced apart from each other, Support hardware for supporting the truss frame from below is fixed to each side of the two structural bodies across which the truss frame is spanned, The support metal fittings are configured so that they can be fixed to the side surfaces of the structure afterwards. a fixing portion that contacts the side surface and is fixed to the side surface by a first fixing device; A support structure for a truss frame, characterized in that it has a support portion that is provided at the upper end of the fixed portion, contacts the lower end of the truss frame, and is fixed to the lower end of the truss frame by a second fixing device.

2. The support portion is a support plate portion fixed in contact with a lower end surface at the lower end portion of the truss frame; The support structure for a truss frame as described in claim 1, characterized in that it is provided with a spring-up portion provided at both widthwise ends of the support plate portion and contacting both side surfaces at the lower end of the truss frame.

3. A corner portion formed in an arc shape in a cross-sectional view is formed between the lower end surface and both side surfaces at the lower end of the truss frame, The support portion has an inside corner portion formed in an arc shape in cross section between both ends of the support plate portion in the width direction and the flip-up portion, 3. The support structure for a truss frame according to claim 2, wherein the radius of curvature of the outer side of the corner portion and the radius of curvature of the inner side of the inside corner portion are set equal.

4. A support structure for a truss frame as described in claim 3, characterized in that a gap into which welding material can melt is formed between the side surface of the fixed portion at the corner of the raised portion, which is formed in an arc shape in cross section, and the end surface of the fixed portion on the raised portion side.

5. The fixing portion is a fixing plate portion fixed in contact with the side surface; 2. The support structure for a truss frame according to claim 1, further comprising a reinforcing plate portion integrally formed with the fixed plate portion and having an upper end portion fixed to the support portion.

6. The truss structure is The upper chord and A lower chord member arranged parallel or approximately parallel to the upper chord member; and a web member connecting the upper chord member and the lower chord member, The lower chord member is set to a length dimension that is approximately equal to the distance from the side surface of one of the structures to the side surface of the other of the two structures, 2. A support structure for a truss frame according to claim 1, characterized in that the upper chord is formed longer than the lower chord, and both ends in the longitudinal direction protrude outward.

7. The upper end surface of one of the structures and the upper end surface of the other structure are set at the same height position, 7. The support structure for a truss frame according to claim 6, wherein the truss frame is a horizontal truss frame in which the upper chord members are arranged horizontally.

8. an upper end surface of one of the structures is located higher than an upper end surface of the other of the structures; The truss frame is a gradient truss frame in which the upper chord members are arranged at an incline, The lower chord member is A long lower chord body arranged parallel or approximately parallel to the upper chord; and a short angle adjustment portion disposed horizontally at both ends of the lower chord body in the longitudinal direction, 7. The support structure for a truss frame according to claim 6, wherein the support portion of the support metal fitting is fixed in contact with the angle adjustment portion.

9. The first row of the truss frame and the second row of the truss frame are arranged adjacent to each other to form a set of truss frame structures that are bridged between the two structures, The support structure of the truss frame described in claim 1, characterized in that the support metal fittings are positioned and fixed on both of the sides of the two structures at a position corresponding to the lower end of the truss frame in the first row and at a position corresponding to the lower end of the truss frame in the second row.

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