Temporary building

Abstract

To provide a simple building which satisfies a prescribed strength, which has a low roof, and which has preferable design property.SOLUTION: A simple building comprises beams 1a, 1b, rafters 2, 3, a roof material 4, and a column 5. The beams 1a, 1b include a main body portion 7 comprising a hollow portion 6 and a gutter portion 8 provided at an inner peripheral side of the main body portion 7. The column 5 straddles a lower face 7a of the main body portion 7 and a lower face 8a of the gutter portion 8 of the beams 1a, 1b to be in contact with and support the beams 1a, 1b. End portions of the rafters 2, 3 in a longer direction are fixed to the inner peripheral side of the main body portion 7 of the beams 1a, 1b. The roof material 4 is attached the rafters 2, 3. The rafters 2, 3 and the roof material 4 are within a vertical dimension H of the beams 1a, 1b.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to simple buildings such as passage shelters and carports.

Background Art

[0002] Conventional simple buildings have a large vertical dimension of the roof girder, resulting in a high roof height (the vertical dimension of the roof itself) (see, for example, Non-Patent Document 1). There has been a demand for a simple building that can obtain a predetermined strength without using large members.

Prior Art Documents

Non-Patent Documents

[0003]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In view of the above-described circumstances, an object of the present invention is to provide a simple building that satisfies a predetermined strength, has a low roof height, and is excellent in design.

Means for Solving the Problems

[0005] In order to achieve the above object, a simple building according to the invention described in claim 1 includes a girder, a purlin, a roof member, and a column. The girder has a main body portion formed of a hollow portion and a gutter portion provided on the inner peripheral side of the main body portion. The column abuts across the lower surface of the main body portion of the girder and the lower surface of the gutter portion to support the girder. The purlin has longitudinal ends straddling the sluice fixed to the inner peripheral side of the main body portion of the girder, and the roof member is attached to the purlin. The purlin and the roof member are housed within the vertical dimension of the girder.

Effects of the Invention

[0006] The simple building according to claim 1 has a main body made of a hollow section on the beam and a gutter section provided on the inner circumference side of the main body, and the ends of the rafters in the longitudinal direction straddling the sluice By fixing the main body of the beam to the inner circumference, the required strength can be ensured while lowering the roof height. Furthermore, since the rafters and roofing materials are contained within the vertical dimensions of the beam, they are hidden by the beam, resulting in a good aesthetic appearance. In addition, because the column abuts across the underside of the main body of the beam and the underside of the gutter, water can easily flow from the gutter of the beam to the column. [Brief explanation of the drawing]

[0007] [Figure 1] This is a cross-sectional view AA in Figure 4. [Figure 2] Figure 4 is a cross-sectional view of BB. [Figure 3] This is a cross-sectional view of CC in Figure 1. [Figure 4] This is a perspective view showing a first embodiment of a simple building according to the present invention. [Figure 5-1] This is a perspective view showing the construction procedure for a simplified building according to the first embodiment. [Figure 5-2] This is a perspective view showing the construction procedure of the simplified building according to the first embodiment (continuation of Figure 5-1). [Figure 6] This is a perspective view showing the state when the rafters and gable rafters are installed. [Figure 7] This is a perspective view showing the state when the water barrier is installed. [Figure 8] This is a perspective view showing the state when the gable end is being installed. [Figure 9] This is a perspective view showing the state when the panel retainer is installed. [Figure 10] Figure 14 is a cross-sectional view of the DD. [Figure 11] This is a cross-sectional view of EE in Figure 14. [Figure 12] Figure 10 is a cross-sectional view of the FF. [Figure 13] (a) is a front view showing a second embodiment of the simple building according to the present invention, and (b) is a side view thereof. [Figure 14]This is a floor plan of a simplified building according to the second embodiment. [Figure 15-1] This is a perspective view showing the construction procedure for a simplified building according to the second embodiment. [Figure 15-2] This is a perspective view showing the construction procedure for the simplified building of the second embodiment (continuation of Figure 15-1). [Modes for carrying out the invention]

[0008] The embodiments of the present invention will now be described based on the drawings. Figures 1 to 9 show a first embodiment of a simple building according to the present invention. The simple building of this embodiment is applied to a passage shelter and, as shown in Figure 4, comprises four columns 5 erected at intervals in the front-to-back and left-to-right directions, and a roof 10 supported on the columns 5. The roof 10 comprises girders 1a and 1b positioned on both the left and right sides, gable ends 11 connecting the front and rear ends of the left and right girders 1a and 1b, gable rafters 3 and 2 installed between the left and right girders 1a and 1b at intervals in the front-to-back direction, and roof panels 4 attached between the gable rafters 3 and rafters 2. The left and right girders 1a and 1b and the front and rear gable ends 11 are arranged horizontally, so the roof 10 appears horizontal and flat when viewed from the surroundings.

[0009] The girders 1a and 1b are formed from extruded aluminum alloy profiles and, as shown in Figure 1, integrally have a main body 7 consisting of a hollow section 6 with a roughly rectangular cross-section and a gutter section 8 provided on the inner circumference side of the roof frame of the main body 7 (hereinafter simply referred to as the "inner circumference side"). On the lower surface 7a of the main body 7, a connecting fitting storage groove 13 for receiving the connecting fitting 12 attached to the upper end of the column 5, and a back plate holding groove 16 for holding the back plate 15 which is fixed to the connecting fitting 13 with bolts 14 are formed along the longitudinal direction of the girders 1a and 1b. The girders 1a and 1b are fixed to the column 5 by the main body 7 via the connecting fitting 12, the back plate 15, and the bolts 14. The gutter part 8 is formed in a groove shape with a substantially U-shaped cross section that is open at the upper side by an inner peripheral side wall 17, a bottom wall 18, and an outer peripheral side wall 19. The outer peripheral side wall 19 also serves as the inner peripheral side wall of the main body part 7, and the lower surface 8a of the gutter part 8 is on the same plane as the lower surface 7a of the main body part 7. The upper part of the inner peripheral side wall 17 is bent in a crank shape toward the inner peripheral side, and a connecting wall 20 is provided in the left-right direction at the upper end part of the inner peripheral side wall 17. At a position one step higher on the inner peripheral side end part of the connecting wall 20, a purlin attachment part 21 is provided, and at the outer peripheral side end part of the connecting wall 20, an attachment part 23 for a panel retainer 22 is provided. The purlin attachment part 21 is at a height position that is approximately half of the vertical dimension H of the purlins 1a and 1b from the lower surfaces of the purlins 1a and 1b. The bottom wall 18 extends to the inner peripheral side more than the inner peripheral side wall 17, and a receiving part 24 for the purlin 2 and the hip rafter 3 is provided at the inner peripheral side end part. A hole for draining the rainwater accumulated in the gutter part 8 is formed in the bottom wall 18, and a drain 25 is attached to the hole.

[0010] In a conventional simple building (see, for example, Non-Patent Document 1), a gutter part was provided on the outer peripheral side of the main body part of the purlin, and the longitudinal end parts of the purlins were attached to the upper surface of the main body part of the purlin, so the height of the roof was high. In this simple building, a main body part 7 composed of a hollow part 6 is provided on the outer peripheral side of the purlins 1a and 1b, a gutter part 8 is provided on the inner peripheral side of the main body part 7, and a purlin attachment part 21 is provided on the inner peripheral side of the gutter part 8. By doing so, the vertical dimension H of the purlins 1a and 1b can be reduced while ensuring a predetermined strength. Specifically, the vertical dimension H of the purlins 1a and 1b is set to 120 mm. By reducing the vertical dimension H of the purlins 1a and 1b, the height of the roof 10 can also be kept low. Since the gutter part 8 is arranged on the inner peripheral side of the main body part 7, the gutter part 8 is not conspicuous and has good design.

[0011] As shown in FIGS. 1 and 2, water stop plates 27 are attached to the front and rear end faces of the left and right purlins 1a and 1b with screws 28. The water stop plate 28 has a height that is approximately half of the vertical dimension H of the purlins 1a and 1b from the lower surface of the purlins 1a and 1b, and closes the mouth of the gutter part 8. A sealer 29 is interposed between the end face of the purlins 1a and 1b and the water stop plate 27. Further, as shown in FIG. 7, the water stop plate 27 is a long member that is attached across the end faces of the left and right purlins 1a and 1b. As shown in Fig. 2, gable roofs 11 are attached to the front and rear sides of the water stop plate 27. The gable roofs 11 are formed of an extruded aluminum alloy material and have a height dimension that is substantially the same as the height dimension H of the purlins 1a and 1b. The gable roofs 11 are attached to the left and right purlins 1a and 1b with screws 30 and are also fixed to the gable purlins 3 from the inside with screws 31.

[0012] As shown in Fig. 2, the gable purlin 3 and the purlin 2 are formed of an extruded aluminum alloy material into a hollow shape with a substantially rectangular cross-section. Also, as shown in Fig. 1, the gable purlin 3 and the purlin 2 are arcuately curved such that the central portion in the longitudinal direction bulges upward, and the longitudinal ends have portions below the upper wall 32 of the hollow portion cut away. The ends of the upper wall 32 are placed on the purlin attachment portions 21 of the purlins 1a and 1b and are fixed with screws 33 from above. By cutting away the longitudinal ends in this way, the gable purlin 3 and the purlin 2 can be arranged at a low position, and the gable purlin 3, the purlin 2, and the roof panel 4 are accommodated within the vertical dimension H of the purlins 1a and 1b with a reduced height.

[0013] The roof panel 4 is formed by cutting a resin panel into a rectangle. As shown in Figs. 1 and 2, the front and rear edges are placed on the upper surfaces of the gable purlin 3 or the purlin 2 and are held by panel retainers 35 attached to the gable purlin 3 and the purlin 2 with screws 34 from above, and the left and right edges are held and attached by panel retainers 22 attached to the purlins 1a and 1b.

[0014] As shown in Fig. 1, the column 5 abuts across the lower surface 7a of the main body portion 7 of the purlins 1a and 1b and the lower surface 8a of the gutter portion 8 to support the purlins 1a and 1b. As shown in Fig. 3, the column 5 includes a column main body 36, column covers 37, 37 attached to the front and rear sides of the column main body 36, and a cover plate 38 for hiding the screws 42 that attach the column covers 37 to the column main body 36. The column main body 36 is formed of an extruded aluminum alloy material and is a hollow profile with a substantially T-shaped cross-section where the inner peripheral side portion 36a is thinner than the outer peripheral side portion 36b. The column cover 37 is made of an extruded aluminum alloy profile and is attached to the narrowed space on the inner circumference of the column body 36, with its outer wall 39 flush with the outer circumference 36b of the column body 36. The outer edge of the column cover 37 is locked into a groove 40 formed in the column body 36, and the inner part is attached to the column body 36 with screws 42. The column cover 37 has a hollow section 41, and the hollow section 41 of one of the front and rear column covers 37 (the front column cover 37 in the illustration) is connected to the gutter section 8 of the girders 1a and 1b via a drain 25, and this hollow section 41 also serves as a downpipe for draining rainwater from the roof. Rainwater that falls on the roof 10 flows along the curved roof panel 4 to the gutter section 8 of the girders 1a and 1b, as shown by arrow 43 in Figure 1. Then, as shown by arrow 44, it flows from the gutter section 8 through the drain 25 to the hollow section 41 of the column cover 37, and is drained to the outside from the lower end of the column cover 37.

[0015] In this simple building, the column 5 supports the girders 1a and 1b by abutting against the lower surface 7a of the main body 7 and the lower surface 8a of the gutter 8, allowing rainwater to flow directly from the gutter 8 to the column 5 (more specifically, the hollow portion 41 of the column cover 37). Furthermore, because the contact surface of the main body 7 with the column 5 (the lower surface 7a of the main body 7) and the contact surface of the gutter 8 with the column 5 (the lower surface 8a of the gutter 8) are on the same plane, the vertical dimension H of the girders 1a and 1b can be reduced, and when viewed from below, the boundary between the main body 7 and the gutter 8 is not visible, resulting in a clean appearance. Additionally, the column 5 only needs to be cut straight at the top, making it easy to process. Moreover, since the column cover 37 also serves as a downpipe, there is no downpipe made of PVC round pipe that is usually installed along the column, resulting in a better design.

[0016] Next, the construction procedure for this simple building will be explained. First, the fastener 45 is fixed to the upper end of the column body 36 with a screw 46 (see Figures 1 and 2), and the connecting fitting 12 is fixed to the upper surface of the fastener 45 with a bolt 47. Next, the four column bodies 36 with the connecting fittings 12 attached are erected in the designated positions on the ground. After that, as shown in Figure 5-1(a), the girders 1a and 1b are placed straddling the front and rear column bodies 36, 36, and the back plates 15 held in the back plate holding grooves 16 of the girders 1a and 1b are fixed to the connecting fittings 12 with bolts 14 to connect the column bodies 36 and the girders 1a and 1b. Next, as shown in Figure 5-1(b), the column cover 37 is attached to the column body 36. Next, as shown in Figure 5-1(c), the gable rafters 3 and 2 are installed between the left and right girders 1a and 1b. As shown in Figure 6, the gable rafters 3 and 2 have their longitudinal ends pre-cut, leaving a portion of the upper wall 32 that receives the roof panel 4. The remaining upper wall 32 is placed on the rafter attachment points 21 of girders 1a and 1b with a sealant 48 in between, and secured with screws 33 from above. Next, as shown in Figures 5-2(d) and 7,8, the water-stopping plates 27 and gable ends 11 are attached across the front and rear end faces of the left and right girders 1a and 1b. Next, as shown in Figures 5-2(e) and 9, the roof panel 4 is placed on the gable rafters 3 and rafters 2, and the panel retainers 22 and 35 are attached to the beams 1a and 1b and the gable rafters 3 and rafters 2 to secure the roof panel 4.

[0017] Figures 10-15 show a second embodiment of the simple building of the present invention. This simple building is applied to a carport and uses corrugated metal sheets 9 as the roofing material. As shown in Figures 13 and 14, this simple building comprises four columns 5 erected at intervals in the front-to-back and left-to-right directions, and a roof 10 supported on top of the columns 5. The roof 10 comprises girders 1a and 1b positioned on both the left and right sides, gable ends 11 connecting the front and rear ends of the left and right girders 1a and 1b, gable rafters 3 and 2 installed between the left and right girders 1a and 1b at intervals in the front-rear direction, and corrugated sheets 9 attached between the gable rafters 3 and rafters 2. The left and right girders 1a and 1b and the front and rear gable ends 11 are arranged horizontally, as in the first embodiment, so that the roof 10 appears horizontal and flat when viewed from the surroundings.

[0018] The left and right girders 1a and 1b are made of extruded aluminum alloy profiles and, as shown in Figure 10, each has a main body 7 formed by stacking two hollow sections 6a and 6b with a roughly rectangular cross-section vertically, and a trough 8 provided on the inner circumference side of the main body 7. On the lower surface 7a of the main body 7, a bolt rail storage groove 51 is formed along the longitudinal direction of the girders 1a and 1b for housing a bolt rail 50 that holds bolts 49 protruding downward. The trough section 8 is formed in the shape of a groove with a roughly U-shaped cross-section, with the upper side open, by the inner circumferential side wall 17, the bottom wall 18, and the outer circumferential side wall 19. The outer circumferential side wall 19 also serves as the inner circumferential side wall of the main body 7, and the lower surface 8a of the trough section 8 is on the same plane as the lower surface 7a of the main body 7. A bolt rail storage groove 51 is also formed along the longitudinal direction on the lower surface 8a of the trough section 8. The upper ends of the outer periphery side wall 19 and inner periphery side wall 17 of the gutter section 8 are provided with mounting sections 52a and 52b on which the longitudinal ends of the gable rafters 3 and rafters 2 are placed. The depth of the gutter section 8 differs between the left and right girders 1a and 1b. In Figure 1, the gutter section 8 is deeper on the right girder 1b than on the left girder 1a, and the height of the mounting sections 52a and 52b is higher on the right girder 1b than on the left girder 1a. Therefore, the gable rafters 3 and rafters 2, which are erected between the left and right girders 1a and 1b with their longitudinal ends placed on the mounting sections 52a and 52b of the left and right girders 1a and 1b, are slightly inclined so that the right side is slightly higher. The bottom wall 18 of the gutter section 8 has holes formed in it for draining rainwater accumulated in the gutter section 8, and drainage holes 25 are attached to these holes.

[0019] In this way, the girders 1a and 1b are provided with a main body 7 consisting of hollow sections 6a and 6b on the outer circumference, a gutter section 8 on the inner circumference of the main body 7, and the longitudinal ends of the gable rafters 3 and 2 are attached to the inner circumference of the main body 7. Compared to the case where the gutter section 8 is provided on the outer circumference of the main body 7, the vertical dimension H of the girders 1a and 1b can be made lower. Specifically, the vertical dimension H of the girders 1a and 1b is 180 mm, which is higher than that of the first embodiment due to the thicker roofing material.

[0020] As shown in Figure 11, the gable rafters 3 and 2 are formed from extruded aluminum alloy profiles, creating a hollow structure with a roughly rectangular cross-section. The lower walls 53 of the gable rafters 3 and 2 protrude laterally, and as shown in Figure 10, these protruding portions are placed on mounting sections 52a that project from the outer peripheral side walls 19 of the gutter sections 8 of the girders 1a and 1b, and are fixed from above with screws 54.

[0021] As shown in Figure 11, the corrugated sheet 9 is made by bending a steel plate to create a shape with alternating peaks 55 and valleys 56 in the front-to-back direction, and multiple sheets are arranged in a row in the front-to-back direction as shown in Figure 14. As shown in Figure 11, both the front and rear ends of the corrugated sheet 9 are peaks 55, and the peaks 55 at the rear end of adjacent front corrugated sheet 9 and the peaks 55 at the front end of rear corrugated sheet 9 are stacked vertically and placed on the upper surface of the rafter 2 and fixed with roof bolts 57. In addition, the peaks 55 at the front end of the foremost corrugated sheet 9 and the peaks 55 at the rear end of the rearmost corrugated sheet 9 are placed on the upper surface of the gable rafter 3 and fixed with roof bolts 57. As shown in Figure 10, the corrugated sheet 9 has a length in the left-right direction that is shorter than the rafters 2 and the gable rafters 3, and its left and right edges 9a are located slightly to the outer edge of the inner circumferential side walls 17 of the gutter sections 8 of the girders 1a and 1b. The corrugated sheet 9 is then placed on mounting sections 52b that protrude from the inner circumferential side walls 17 of the gutter sections 8 of the girders 1a and 1b at its left-right ends, and is fixed in place with screws 58 from above. The corrugated metal sheet 9 is positioned at an angle, similar to the gable rafters 3 and 2, with the right side being slightly higher. Rainwater that falls on the roof 10 flows down the valley section 56 of the corrugated metal sheet 9 into the gutter section 8 of the left-side girder 1a, as shown by arrow 43 in Figure 10. The gable rafters 3 and 2 and the corrugated sheet 9 are contained within the vertical dimension H of girders 1a and 1b.

[0022] As shown in Figures 10 and 14, flashing 59 is attached to the upper surfaces of the gable rafters 3 and 2 along the front-to-back direction. The flashing 59 covers the gap between the corrugated sheet 9 and the main body 7 of the girders 1a and 1b, preventing fallen leaves and other debris from entering the gutter section 8 of the girders 1a and 1b.

[0023] As shown in Figure 10, column 5 supports girders 1a and 1b by straddling and abutting the lower surface 7a of the main body 7 and the lower surface 8a of the gutter 8. Bolt rails 50, each holding a bolt 49 protruding downwards, are held in bolt rail storage grooves 51 on the lower surface 7a of the main body 7 and the lower surface 8a of the gutter 8 of girders 1a and 1b. The connecting fittings 60 are attached to the lower surfaces of girders 1a and 1b by inserting the bolt 49 into the connecting fittings 60 and fastening them with nuts. As shown in Figures 10 and 11, the connecting fittings 60 are inserted into the upper end of column 5 and fixed to column 5 with bolts 61 from the front and rear. In this way, girders 1a and 1b are fixed to column 5, with the main body 7 and gutter 8 respectively. As shown in Figure 12, the column 5 comprises a column body 36, a downpipe base 62 attached to the front of the column body 36, a downpipe 63 that engages with the downpipe base 62 and is attached to the front of the column body 36, and a cover plate 38 that engages with and is attached to a groove 64 of the column body 36. The downpipe 63 has a rectangular hollow section 65, and its left and right sides 66, 66 are flush with the left and right sides of the column body 36. The hollow section 65 of the downpipe 63 is in communication with the gutter sections 8 of girders 1a and 1b via a drain 25. Therefore, rainwater that enters the gutter sections 8 of girders 1a and 1b flows through the drain 25 to the hollow section 65 of the downpipe 63, as shown by arrow 44 in Figure 10, and is drained to the outside from the lower end of the downpipe 63. The cover plate 38 blocks the groove 64 in the column body 36 and hides the heads of the bolts 61 that secure the connecting fitting 60 to the column body 36. Note that the downpipe 63 is attached only to the front column 5, while the rear column 5 has cover plates 38 attached to both the front and rear grooves 64 of the column body 36.

[0024] Next, we will explain the construction procedure for this simple building. First, as shown in Figure 15-1(a), water-stopping plates 27 are attached to the front and rear end faces of the left and right girders 1a and 1b, and connecting fittings 60 are attached to the underside of the girders 1a and 1b. Next, as shown in Figure 15-1(b), the columns 5 (column bodies 36) are erected at the predetermined positions, and the left and right girders 1a and 1b are installed on the upper ends of the front and rear columns 5. Next, as shown in Figure 15-1(c), the gable rafters 3 and gable fascia 11 are attached between the front and rear ends of the left and right girders 1a and 1b. Next, as shown in Figure 15-1(d), processing (hole drilling) is performed on the corrugated sheet 9. Next, as shown in Figure 15-2(e), rafters 2 are erected between the left and right girders 1a and 1b, and then the corrugated sheets 9 are attached. Next, install the drain 59 as shown in Figure 15-2(f). Next, as shown in Figure 15-2(g), the downpipe 63 is attached to the column 5. Next, as shown in Figure 15-2(h), the cover plate 38 is attached to the column 5.

[0025] As described above, the simple buildings of the first and second embodiments have a main body 7 consisting of hollow sections 6, 6a, 6b on the girders 1a, 1b, and a gutter section 8 provided on the inner circumference of the main body section 7. The rafters 2, 3 have their longitudinal ends fixed to the inner circumference of the main body section 7 of the girders 1a, 1b, which allows the height of the roof 10 to be lowered while ensuring a predetermined strength. Moreover, since the rafters 2, 3 and roofing materials 4, 9 are contained within the vertical dimension H of the girders 1a, 1b, the rafters 2, 3 and roofing materials 4, 9 are hidden by the girders 1a, 1b, resulting in a good design. Furthermore, since the column 5 abuts across the lower surface 7a of the main body section 7 of the girders 1a, 1b and the lower surface 8a of the gutter section 8, water can easily flow from the gutter section 8 of the girders 1a, 1b to the column 5. Furthermore, in the simplified buildings of the first and second embodiments, the contact surfaces 7a of the main body 7 with the columns 5 and the contact surfaces 8a of the gutter 8 with the columns 5 are on the same plane, which allows the vertical dimension H of the girders 1a and 1b to be reduced, and when viewed from below, the boundary between the main body 7 and the gutter 8 is not visible, resulting in a clean appearance. Additionally, the processing of the columns 5 is simplified because only the upper end needs to be cut straight. In the first embodiment of the simple building, the girders 1a and 1b are made of extruded profiles in which the main body 7 and the gutter 8 are integrally molded, and the main body 7 is fixed to the column 5. Since the main body 7 of the girders 1a and 1b mainly bears the strength against wind pressure and gravity, fixing the main body 7 to the column 5 allows the load applied to the girders 1a and 1b to be efficiently transmitted to the column 5, and a predetermined strength can be stably maintained. Furthermore, in the simple building of the first embodiment, the roof material 4 is a resin panel, and the ends of the rafters 2 and 3 are notched in the longitudinal direction, leaving the upper wall 32, which allows the height of the roof 10 to be made even lower. In the second embodiment of the simple building, the girders 1a and 1b are made of extruded profiles in which the main body 7 and the gutter 8 are integrally molded, and the main body 7 and the gutter 8 are fixed to the columns 5, so that the girders 1a and 1b can be firmly fixed by the columns 5. Furthermore, by providing a horizontal wall 67 in the middle of the main body 7 of the girders 1a and 1b to divide the hollow sections 6a and 6b into upper and lower parts (see Figure 10), it becomes possible to extrude the main body 7 and the gutter 8 integrally even if the vertical dimension H of the girders 1a and 1b is larger than that of the first embodiment.

[0026] The present invention is not limited to the embodiments described above. The cross-sectional shapes of the girders, rafters, and columns can be changed as appropriate. The lower surface of the main body and the lower surface of the gutter are not necessarily on the same plane. The present invention can be applied to any simple building, not limited to passage shelters and carports, but also to bicycle ports, bus stops, and other small structures. [Explanation of Symbols]

[0027] 1a, 1b digits 2 rafters 3. Gable rafters (rafters) 4. Roof panels (roofing materials) 5 pillars 6,6a,6b Hollow part 7 Main body 8 Hibe 9. Corrugated metal roofing (roofing material)

Claims

[Claim 1] A simple building comprising a beam, rafters, roofing material, and columns, wherein the beam has a main body consisting of a hollow section and a gutter section provided on the inner circumference of the main body, the columns support the beam by abutting across the lower surface of the main body and the lower surface of the gutter, the rafters have their longitudinal ends fixed to the inner circumference of the main body of the beam, straddling the gutter, and the roofing material is attached to the rafters, and the rafters and roofing material are contained within the vertical dimensions of the beam.

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