Wood covering steel frame structure and construction method of the same

Abstract

To provide a wood covering steel frame structure whose degree of freedom for woodwork is high, and which can easily perform construction.SOLUTION: A wood covering steel frame structure includes a steel frame beam material 11, a steel frame column material 31, beam lumber 12 and a column lumber 32. The beam lumber 12 includes an upper lumber 21, a lower lumber 22 and a pair of side part lumbers 23, 23. The upper lumber 21 and the lower lumber 22 have the same width dimension with the steel frame beam material 11, and are laid intermittently with a predetermined interval along the longer direction of the steel frame beam material 11. In the side part lumber 23, an upper end part protrudes further upward than an upper end of the steel frame beam material 11 and is fixed to a side surface of the upper lumber 21, and a lower end part protrudes further downward than a lower end of the steam frame beam material 11 and is fixed to a side surface of the lower lumber 22. An upper end part of the steel column material 31 protrudes further upward than an upper end of the column lumber 32, and in a gap of lower lumbers 22 adjacent to each other in the longer direction of the beam lumber 12, is inserted in a recessed part 25 formed between the pair of side part lumbers 23, 23, and is fixed to a bottom surface of the steel frame beam material 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a wood-covered steel frame structure and a method for constructing the same. [Background technology]

[0002] There is a known structure in which wood is attached to steel columns and beams, providing high structural strength and making it easier for carpenters to carry out woodworking (see, for example, Patent Document 1). In the structure of Patent Document 1, a fastener consisting of a bolt member and a nut member is attached to the flange of an H-beam, and the wood is screwed to a wood mounting plate formed on the bolt member, thereby connecting the H-beam and the wood. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2002-348967 A Summary of the Invention [Problem to be solved by the invention]

[0004] In the structure of Patent Document 1, the wood is partially attached to the steel frame, which limits the joint positions when carrying out carpentry work, resulting in a problem of low freedom in carpentry work.

[0005] The present invention aims to provide a wood-covered steel structure that allows for a high degree of freedom in woodworking and is easy to install, and a method for constructing the same. [Means for solving the problem]

[0006] The first invention for solving such problems is a timber-covered steel structure in which steel columns and beams are covered with timber, the structure comprising steel beams and steel columns made of the steel, beam timber covering the steel beams, and column timber covering the steel columns, the beam timber having an upper timber fixed to the upper part of the steel beam, a lower timber fixed to the lower part of the steel beam, and a pair of side timbers respectively disposed on both sides of the steel beam in the beam width direction, the upper timber and the lower timber having the same width as the steel beam, and extending along the longitudinal direction of the steel beam. This is a wood-covered steel structure in which the side timbers are laid intermittently at a predetermined interval, the side timbers are arranged along the longitudinal direction of the steel beam, with their upper ends protruding above the upper end of the steel beam and fixed to the side of the upper timber, and their lower ends protruding below the lower end of the steel beam and fixed to the side of the lower timber, and the upper ends of the steel column materials protruding above the upper ends of the column timbers and inserted into recesses formed between the lower ends of a pair of side timbers in the gap between adjacent lower timbers in the longitudinal direction of the beam timber, and fixed to the bottom surface of the steel beam.

[0007] According to the wood-covered steel structure of the present invention, the side timbers of the beams are arranged along the longitudinal direction of the steel beams and protrude above the steel beams at the top and bottom, which allows for a wider construction surface for woodworking and greater freedom. The side timbers are also fixed to the sides of the upper and lower timbers, making construction easier. Furthermore, the upper and lower timbers are laid intermittently, so the top or bottom of the steel beams faces the outside, and the ends of the steel columns can be directly fixed to the steel beams.

[0008] In the wood-covered steel structure of the present invention, the column wood has a pair of first side wood pieces arranged on both sides in the width direction of the steel column, and the first side wood pieces are preferably formed on the same plane as the side wood pieces of the beam wood. The width direction of the steel column is the same direction as the beam width direction of the steel beam. With this configuration, the side surface of the steel beam material and the side surface of the steel column material can be made flush with each other, and the surface of the side wood pieces of the beam material and the first side wood pieces of the column wood can be made flush with each other.

[0009] In the wood-covered steel structure of the present invention, it is preferable that the wooden columns further include a pair of second side wooden pieces arranged on both sides of the steel column in a direction perpendicular to the width of the steel column. With this configuration, the steel beam can be surrounded by the wooden columns on all four sides.

[0010] In the wood-covered steel structure of the present invention, it is preferable that the structure further comprises wooden studs provided between adjacent columns, the upper ends of the studs being inserted into the recesses and fixed to the lower ends of the pair of side timbers. With this configuration, the studs can be easily fixed from the side of the steel beam material.

[0011] In the wood-covered steel structure of the present invention, the steel beams are preferably made of C-shaped steel. With this configuration, the timber beams can be easily fixed to the top, bottom and sides of the steel beams.

[0012] In the wood-covered steel structure of the present invention, it is preferable that braces are provided between adjacent columns in an X-shape, and studs extending above and below are connected to the intersections of the braces. With this configuration, studs can be installed in a well-balanced manner between adjacent columns.

[0013] In the wood-covered steel structure of the present invention, it is preferable that a pair of side timbers have cutouts at the lower ends of the pair of side timbers at positions corresponding to the gaps between the lower timbers adjacent in the longitudinal direction of the timber of the foundation beam. With this configuration, ventilation under the floor can be ensured.

[0014] The second invention for solving the above-mentioned problem is a method for constructing a timber-covered steel structure as described in any one of claims 1 to 7, comprising a beam forming step of covering the steel beam material with the timber beam timber to form a beam, a column forming step of covering the steel column material with the timber column to form a column, a column installation step of erecting the column, and a beam installation step of installing the beam on the column, in which in the beam forming step, lower timbers having a width dimension equivalent to that of the steel beam material are intermittently laid at predetermined intervals along the longitudinal direction of the steel beam material, and The method is characterized in that the side wood is laid so that the lower ends of the side wood on both opposite sides extend downwardly beyond the lower ends of the steel beam, and in the column forming process, the side wood is laid on the steel column so that the upper ends of the steel column protrude upwardly beyond the upper ends of the side wood on both widthwise sides of the steel column, and in the beam installation process, the beam is installed so that the upper ends of the steel column are inserted into recesses formed between the lower ends of a pair of side woods in the gap between the lower woods adjacent to each other in the longitudinal direction of the beam wood, and the upper ends of the steel column are fixed to the bottom surface of the steel beam.

[0015] The method for constructing a wood-covered steel structure of the present invention further includes a stud installation process for installing wooden studs between adjacent columns, and in the stud installation process, it is preferable that the ends of the studs are inserted into the recesses of the beams and fixed to the side wood. Effect of the Invention

[0016] The wood-covered steel structure and construction method of the present invention allow for greater freedom in woodworking, making construction easier. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a side view of a wood-covered steel structure according to an embodiment of the present invention, as seen from inside the building. [Diagram 2] 2 is a cross-sectional view taken along line II-II in FIG. 1, showing a column portion of a wood-covered steel structure according to an embodiment of the present invention. [Diagram 3]3 is a cross-sectional view taken along line III-III in FIG. 1, showing a stud portion of a wood-covered steel frame structure according to an embodiment of the present invention. [Figure 4] 4 is a cross-sectional view taken along line IV-IV in FIG. 1, showing a beam of a wood-covered steel structure according to an embodiment of the present invention. [Diagram 5] 2 is a cross-sectional view taken along line VV of FIG. 1, showing a column of a wood-covered steel structure according to an embodiment of the present invention. FIG. [Figure 6] FIG. 2 is a side view showing a brace portion of a wood-covered steel structure according to an embodiment of the present invention. [Figure 7] 7 is a cross-sectional view taken along line VII-VII in FIG. 6, showing a stud portion joined to a brace of a wood-covered steel frame structure according to an embodiment of the present invention. FIG. [Figure 8] FIG. 8 is an enlarged cross-sectional view of a main portion of part VIII in FIG. 7, showing a joint structure between a brace and a stud. [Figure 9] FIG. 7 is an enlarged side view of part IX in FIG. 6, showing the joint structure between the brace and the stud. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the present invention will be described in detail with reference to the attached drawings. First, the configuration of a wood-covered steel structure according to this embodiment will be described. As shown in Fig. 1, a wood-covered steel structure 1 is a structure in which steel columns 30 and beams 10 are covered with wood, and includes steel beams 11, steel columns 31, beam timber 12, and column timber 32.

[0019] As shown in Figs. 2 to 5, the steel beam 11 is a steel material embedded inside the beam 10. The steel beam 11 is, for example, made of lip channel steel (C-shaped steel) and includes a web 13, an upper flange 14, a lower flange 15, and a pair of lips 16, 16. The steel beam 11 extends horizontally at a predetermined length, and adjacent steel beams 11, 11 are fixed to each other by bolting brackets (not shown) provided at the ends. The steel beam 11 is arranged so that the channel-shaped opening faces horizontally. The steel beam 11 extends horizontally above and below the column 30, and the beam 10 is configured to be a through member. Reinforcement plates 17 (see Figs. 1 and 2) are provided in the channel-shaped openings (between the pair of lips 16, 16) of the steel beam 11 located above and below the column 30. The reinforcing plate 17 is made of a metal plate, and is placed and welded to the inside of the upper and lower lips 16, 16. The inside of the steel beams 11 arranged on the outer periphery of the building is filled with a heat insulating material.

[0020] The beam wooden piece 12 is a piece of wood that covers the steel beam material 11. The beam wooden piece 12 is provided to facilitate woodworking after assembling the column 30 and the beam 10. The beam wooden piece 12 has an upper wooden piece 21, a lower wooden piece 22, and a pair of side wooden pieces 23, 23.

[0021] The upper wooden piece 21 is a plate-shaped piece of wood fixed to the top of the steel beam, and has a width dimension equivalent to the width dimension of the steel beam (the overhang dimension of the upper flange 14). The upper wooden piece 21 is fixed to the steel beam 11 by driving a tapping screw from above toward the upper flange 14 below. The upper wooden pieces 21 are laid intermittently at a predetermined interval along the longitudinal direction of the steel beam 11. Specifically, the upper wooden pieces 21 are arranged so as to leave open the positions where the pillar 30 and the partition posts 60, 65 described below are to be installed, and are provided at the longitudinal end of the steel beam 11. In other words, at the positions where the pillar 30 and the partition posts 60, 65 are to be installed, the upper wooden piece 21 is not laid on the upper surface of the steel beam 11 (the surface of the upper flange 14), and the upper flange 14 is exposed.

[0022] The lower wooden piece 22 is a plate-shaped piece of wood fixed to the lower part of the steel beam, and has a width dimension equivalent to the width dimension of the steel beam (the overhang dimension of the lower flange 15). The lower wooden piece 22 is fixed to the steel beam 11 by tapping screws driven from below toward the lower flange 15 above. The lower wooden piece 22 is laid intermittently at a predetermined interval along the longitudinal direction of the steel beam 11. Specifically, the lower wooden piece 22 is arranged so as to leave open the positions where the pillar 30 and the partition posts 60, 65 described below are to be installed, and is provided at the longitudinal end of the steel beam 11. In other words, the lower wooden piece 22 is not laid on the lower surface of the steel beam 11 (the surface of the lower flange 15) at the positions where the pillar 30 and the partition posts 60, 65 are to be installed, and the lower flange 15 is exposed.

[0023] The side pieces 23 are arranged on both sides of the steel beam 11 in the beam width direction. The pair of side pieces 23 are arranged along the longitudinal direction of the steel beam 11. The upper ends of the side pieces 23 protrude upward from the upper end of the steel beam 11. The upward protruding dimension of the upper ends of the side pieces 23 is equal to the thickness dimension of the upper piece 21, and the upper end faces of the side pieces 23 and the upper surface of the upper piece 21 are flush with each other. The side pieces 23 are fixed to the upper piece 21 by inserting wood screws from the outside of the protruding parts of the upper ends of the side pieces 23 toward the upper piece 21. In the part where the upper piece 21 is not arranged above the steel beam 11, the protruding parts of the upper ends of the side pieces 23 become side walls on both sides, and an upward recess 24 is formed with the upper surface of the steel beam 11 as the bottom surface.

[0024] The lower ends of the side wood pieces 23 protrude downward beyond the lower ends of the steel beams 11. The downward protrusion dimension of the lower ends of the side wood pieces 23 is equal to the thickness dimension of the lower wood piece 22, and the lower end faces of the side wood pieces 23 and the lower faces of the lower wood pieces 22 are flush with each other. The side wood pieces 23 are fixed to the lower wood pieces 22 by attaching wood screws from the outside of the protruding parts of the lower ends of the side wood pieces 23 toward the lower wood pieces 22. In the parts below the steel beams 11 where the lower wood pieces 22 are not positioned, the protruding parts of the lower ends of the side wood pieces 23 form side walls on both sides, and a downward recess 25 is formed whose bottom surface is the lower surface of the steel beams 11.

[0025] A floor joist support 50 is fixed to the side wooden piece 23 on the indoor side with wood screws. A floor joist 51 is hung across the floor joist support 50, and a floorboard 52 is laid on the floor joist 51.

[0026] The steel column 31 is a steel material buried inside the column 30, and is, for example, a tubular column made of a square pipe. The width direction (the same direction as the beam width direction of the steel beam 11) of the steel column 31 is the same as the beam width dimension of the steel beam 11. Metal plates 33 that close the openings are welded to the lower and upper ends of the steel column 31. The lower end of the steel column 31 is bolted to the upper end surface (upper flange 14) of the steel beam 11 of the lower foundation beam 10a or beam via the metal plate 33 (see FIG. 2). A bolt insertion hole is formed in the metal plate 33 at the lower end, and a nut into which the bolt is screwed is welded to the upper surface of the periphery. Meanwhile, the upper end of the steel column 31 is bolted to the lower end surface (lower flange 15) of the steel beam 11 of the upper beam 10 via the metal plate 33 (see FIG. 2). A bolt insertion hole is formed in the metal plate 33 at the upper end, and a nut into which the bolt screws is welded to the underside of the peripheral portion.

[0027] The column wood 32 is wood that covers the steel column material 31. The column wood 32 is provided to facilitate woodworking after assembling the column 30 and the beam 10. The column wood 32 has a pair of first side wood pieces 41, 41 and a pair of second side wood pieces 42, 42.

[0028] The first side wooden pieces 41 are plate-shaped wooden pieces arranged on both sides of the width direction of the steel column 31 (the same direction as the beam width direction of the steel beam 11). The first side wooden pieces 41 extend along the longitudinal direction (up-down direction) of the steel column 31. The first side wooden pieces 41 are fixed to the steel column 31 by tapping screws driven from the side toward the inner steel column 31. The first side wooden pieces 41 have a plate thickness equivalent to that of the side wooden pieces 23 of the beam wooden pieces 12, and the surface of the first side wooden pieces 41 is flush with the surface of the side wooden pieces 23 (coplanar). In a side view, the left and right ends of the first side wooden pieces 41 protrude outward beyond the left and right ends of the steel column 31. The protruding dimension of the protruding portions of the left and right ends of the first side wooden pieces 41 is equivalent to the thickness dimension of the second side wooden pieces 42.

[0029] For example, if the exterior wall is clad in siding, furring strips 55 are fixed with wood screws to the first side wooden piece 41 and side wooden piece 23 located on the outside of the room, and siding material 56 is installed on the outside of them. Meanwhile, an interior wall panel 57 is laid on the first side wooden piece 41 located on the inside of the room. Above the interior wall panel 57, wooden battens 58 supporting the rafters are fixed to the first side wooden piece 41 with wood screws, and a ceiling panel 59 is fixed to the rafters attached to the wooden battens 58 with wood screws or nails.

[0030] The upper end of the first side wooden piece 41 is formed so as to be lower than the upper end of the steel column material 31, and the upper end of the steel column material 31 protrudes above the upper end of the first side wooden piece 41. The protruding dimension of the protruding portion 34 at the upper end of the steel column material 31 (the distance between the upper end of the first side wooden piece 41 and the upper end of the steel column material 31) is equal to the thickness dimension of the lower wooden piece 22. The protruding portion 34 at the upper end of the steel column material 31 is inserted into a recess 25 (a recess formed between the lower ends of a pair of side wooden pieces 23, 23 in the gap between the lower wooden pieces 22 adjacent in the longitudinal direction of the beam wooden piece 12 of the beam 10). A metal plate 33 at the upper end of the steel column material 31 abuts against the lower flange 15 of the steel beam material 11 and is bolted.

[0031] The lower end of the first side timber 41 is formed so as to be higher than the lower end of the steel column material 31, and the lower end of the steel column material 31 protrudes downward from the lower end of the first side timber 41. The protruding dimension of the protruding portion 35 at the lower end of the steel column material 31 (the distance between the lower end of the first side timber 41 and the lower end of the steel column material 31) is equal to the thickness dimension of the upper timber 21. The protruding portion 35 at the lower end of the steel column material 31 is inserted into a recess 24 (a recess formed between the upper ends of a pair of side timbers 23, 23 in the gap between the upper timbers 21 adjacent in the longitudinal direction of the beam timber 12 of the beam 10 (foundation beam 10a in FIG. 2 )). A metal plate 33 at the lower end of the steel column material 31 abuts against the upper flange 14 of the steel beam material 11 and is bolted.

[0032] The second side wood 42 is a plate-shaped piece of wood arranged on both sides (left and right sides in side view) of the steel column 31 in a direction perpendicular to the width direction (the same direction as the beam width direction of the steel beam 11). The second side wood 42 extends along the longitudinal direction (up and down direction) of the steel column 31, like the first side wood 41. The length of the second side wood 42 in the beam width direction is equal to the beam width direction dimension of the steel column 31, and the second side wood 42 fits between the protruding parts of the pair of first side woods 41, 41. The thickness dimension of the second side wood 42 is equal to the protruding dimension of the protruding part of the first side wood 41, so that the surface of the second side wood 42 and the end face of the first side wood 41 are flush with each other. The second side wood 42 is fixed to the first side wood 41 by a wood screw that is inserted from the side (surface) of the first side wood 41 toward the end face of the second side wood 42. It should be noted that the second side timber 42 is not provided on the side of the column 30 to which the brace 70 described below is connected, and the side of the steel column material 31 is exposed.

[0033] Among the beams 10, the foundation beam 10a laid on the foundation 2 is installed on the support part 3 formed on the foundation 2. The support part 3 is a rising part formed of concrete. The height dimension of the support part 3 is a size that the wooden beam 12 does not hit the top end of the foundation concrete. The support part 3 is arranged below the installation position of the column 30. The top of the anchor bolt 4 buried in the foundation 2 protrudes from the installation position of the support part 3, and the foundation beam 10a is fixed to the foundation 2 via this anchor bolt 4. The upper end of the anchor bolt 4 penetrates the lower flange 15 of the steel beam material 11, and a nut is screwed into it. As a result, the steel beam material 11 is arranged with a gap between the upper end of the foundation 2 and the height dimension of the support part 3.

[0034] A notch 26 is formed in each lower end of a pair of side wooden pieces 23, 23 of the foundation beam 10a. The notch 26 is formed facing downward at a position equivalent to the gap between the longitudinally adjacent lower wooden pieces 22, 22 (a position facing the recess 25), and the side of the recess 25 is opened. This opens the side of the gap between the foundation 2 and the steel beam material 11, and the spaces on both the left and right sides of the support part 3 become air passages 27 through which air can pass.

[0035] As shown in Figs. 1 and 3, a stud 60 is provided between adjacent columns 30, 30 depending on the location. The stud 60 is made of a wooden square timber and is hung between the upper beam 10 and the lower foundation beam 10a (or beam 10). The width dimension of the stud 60 (the same direction as the beam width direction of the steel beam material 11) is equal to the width dimension of the beam 10 (the combined width dimension of the steel beam material 11 and the pair of side wooden pieces 23, 23). An upward protrusion 61 is formed at the upper end of the stud 60. The protrusion 61 is cut out on both sides in the width direction of the column 30 to reduce its width dimension. The width dimension of the protrusion 61 is equal to the width dimension of the steel beam material 11. The height dimension of the protrusion 61 is equal to the thickness dimension (height dimension) of the lower wooden piece 22 of the beam 10. The protrusion 61 is inserted into a downward recess 25 defined by the lower end of the side wooden piece 23 of the beam 10 and the lower surface of the steel beam material 11. A wood screw is inserted from the outside of the side wooden piece 23 toward the protrusion 61, and the upper end of the stud 60 is fixed to the side wooden piece 23.

[0036] A downward protrusion 62 is formed at the lower end of the partition 60. Like the protrusion 61, the protrusion 62 has both sides in the width direction of the column 30 cut out to reduce its width. The width direction dimension of the protrusion 62 is equal to the width dimension of the steel beam material 11. The height dimension of the protrusion 62 is equal to the thickness dimension (height dimension) of the upper wooden piece 21 of the beam 10. The protrusion 62 is inserted into an upward recess 24 defined by the upper end of the side wooden piece 23 of the beam 10 and the upper surface of the steel beam material 11. A wood screw is inserted from the outside of the side wooden piece 23 toward the protrusion 62, and the lower end of the partition 60 is fixed to the side wooden piece 23.

[0037] As shown in Figs. 6 to 9, a brace 70 is provided between adjacent columns 30, 30 depending on the location. The metal plates 33 welded to the upper and lower ends of the steel column material 31 of the column 30 adjacent to the brace 70 extend and protrude toward the brace 70 side from the side surface of the steel column material 31 (see Fig. 6). The brace 70 includes, for example, a first diagonal member 71 extending from the upper end of one column 30 to the lower end of the other column 30, and a second diagonal member 72 extending from the lower end of one column 30 to the upper end of the other column 30, and is formed to cross in an X shape in a side view. Both the first diagonal member 71 and the second diagonal member 72 are made of metal square pipes. The first diagonal member 71 is divided into two at the middle, an upper first diagonal member 71a and a lower first diagonal member 71b. The second diagonal member 72 is divided into two at the middle, an upper second diagonal member 72a and a lower second diagonal member 72b.

[0038] The column-side end faces of the upper first diagonal member 71a, the lower first diagonal member 71b, the upper second diagonal member 72a and the lower second diagonal member 72b are cut into a right-angle shape with a vertical plane and a horizontal plane, and are welded to the side of the upper or lower end of the steel column material 31 of the column 30 and to the protruding portion of the metal plate 33 protruding laterally from the steel column material 31.

[0039] The inner ends of the upper first diagonal member 71a, the lower first diagonal member 71b, the upper second diagonal member 72a, and the lower second diagonal member 72b are connected to each other at the center between the columns 30, 30 via a connecting plate 73. The connecting plate 73 has a rectangular shape in a side view. The inner ends of the upper first diagonal member 71a, the lower first diagonal member 71b, the upper second diagonal member 72a, and the lower second diagonal member 72b are each formed with a slit 74 (see Figures 8 and 9) through which the connecting plate 73 can be inserted. The connecting plate 73 is inserted into the slit 74 and the intersections are welded to connect the diagonal members 71a, 71b, 72a, and 72b to the connecting plate 73. The columns 30, 30, brace 70 and connecting plate 73 are welded together in advance at the factory, and the first side piece 41 and second side piece 42 are attached to the column 30 at the factory, and the components are then transported to the construction site.

[0040] Studs 65 are provided above and below the connecting plate 73. The studs 65 are made of wooden square timbers, similar to the studs 60. The studs 65 are divided into an upper stud 65a and a lower stud 65b at the middle. As shown in FIG. 7, a protrusion 61 similar to that of the stud 60 is formed at the upper end of the upper stud 65a. Above the stud 65, the lower wooden piece 22 of the beam 10 is not provided, and a downward recess 25 is formed. The protrusion 61 of the upper stud 65a is inserted into the downward recess 25, and a wood screw is inserted from the outside of the side wooden piece 23 toward the protrusion 61, thereby fixing the upper end of the upper stud 65a to the side wooden piece 23 of the beam 10. As shown in FIG. 8 and FIG. 9, a step 66 is formed at the lower end of the upper stud 65a. The step portion 66 is formed by cutting out the interior side of the stud 65 in the thickness direction, and the interior surface of the step portion 66 abuts the exterior wall surface of the upper end of the connecting plate 73. The lower corners of the step portion 66 in the left-right direction in a side view are chamfered to follow the shapes of the upper first diagonal member 71a and the upper second diagonal member 72a. The lower end of the upper stud 65a is fixed to the connecting plate 73 by driving a screw toward the step portion 66 from the interior side of the connecting plate 73.

[0041] As shown in FIG. 7, a convex portion 62 similar to that of the stud 60 is formed at the lower end of the lower stud 65b. The upper wooden piece 21 of the foundation beam 10a is not provided below the stud 65, and an upward recess 24 is formed. The convex portion 62 of the lower stud 65b is inserted into the upward recess 24, and a wood screw is inserted from the outside of the side wooden piece 23 toward the convex portion 62, thereby fixing the lower end of the lower stud 65b to the side wooden piece 23 of the beam 10. As shown in FIG. 8 and FIG. 9, a step portion 67 is formed at the upper end of the lower stud 65b. The step portion 67 is formed by cutting out the interior side of the stud 65 in the thickness direction, similar to the step portion 66, and the interior side surface of the step portion 67 abuts against the exterior wall side surface of the lower end of the connecting plate 73. The upper corners of the step 67 in the left-right direction in a side view are chamfered to conform to the shapes of the lower first diagonal member 71b and the lower second diagonal member 72b. The upper end of the lower stud 65b is fixed to the connecting plate 73 by driving a screw into the step 67 from the indoor side of the connecting plate 73.

[0042] Next, a method for constructing the timber-covered steel structure 1 according to this embodiment will be described. The method for constructing the timber-covered steel structure 1 includes a beam forming process, a column forming process, a column installation process, a beam installation process, and a brace installation process.

[0043] The beam forming process is a process in which the beam 10 and the foundation beam 10a are formed in advance in a factory or the like by covering the steel beam material 11 with the beam wood 12. In the beam forming process, the beam 10 and the foundation beam 10a are formed. When forming the foundation beam 10a, an upper wooden piece 21 is fixed to the upper flange 14 of the steel beam material 11 with a tapping screw, and a lower wooden piece 22 is fixed to the lower flange 15 with a tapping screw. The upper wooden pieces 21 and lower wooden pieces 22 are arranged intermittently at a specified interval along the longitudinal direction of the steel beam material 11. Specifically, in the portions connecting the columns 30 and the partition posts 60, 65, no upper wooden pieces 21 and lower wooden pieces 22 are provided, and recesses 24, 25 are formed. Next, of the side wooden pieces 23 with the ventilation notches 26 formed therein, the side wooden piece 23 on the web 13 side is placed on the side of the steel beam material 11 and fixed to the upper wooden piece 21 and lower wooden piece 22 with wood screws. In addition, the side timber 23 on the groove-shaped opening side (between a pair of lips 16, 16) of the steel beam material 11 is not attached at the factory, but is fixed to the upper timber 21 and lower timber 22 using wood screws after the foundation beam 10a and anchor bolt 4 are joined at the construction site.

[0044] When forming the beam 10, the upper wooden piece 21 is fixed to the upper flange 14 of the steel beam 11 with a tapping screw, and the lower wooden piece 22 is fixed to the lower flange 15 with a tapping screw. The upper wooden pieces 21 and the lower wooden pieces 22 are arranged intermittently at a predetermined interval so as to form recesses 24, 25. Next, of the side wooden pieces 23, the side wooden piece 23 on the web 13 side is placed on the side of the steel beam 11 and fixed to the upper wooden piece 21 and the lower wooden piece 22 with wood screws. Note that the side wooden piece 23 on the groove-shaped opening side of the steel beam 11 is not attached at the factory, but is fixed to the upper wooden piece 21 and the lower wooden piece 22 with wood screws after the beam 10 and the column 30 are joined at the construction site.

[0045] The column formation process is a process in which a steel column material 31 is covered with a column timber 32 in a factory or the like to form a column 30 in advance. In the column formation process, first side timbers 41 are placed on both sides of the steel column material 31 in the width direction (the same direction as the beam width direction of the steel beam material 11) and fixed with tapping screws. At this time, the first side timber 41 is laid on the steel column material 31 so that the upper end of the steel column material 31 protrudes upward from the upper end of the first side timber 41. After that, second side timbers 42 are placed on both sides (left and right sides in side view) in the orthogonal direction perpendicular to the width direction of the steel column material 31 and fixed to the first side timber 41 with wood screws.

[0046] In addition to the beam 10 and the column 30, a part including a brace 70 and two columns 30 on both sides (hereinafter, sometimes referred to as a "brace part") is also formed in advance in a factory or the like. When forming the brace part, first, the upper first diagonal member 71a, the lower first diagonal member 71b, the upper second diagonal member 72a, and the lower second diagonal member 72b are welded to the connecting plate 73 to be integrated. Then, the metal plate 33 and the end of the brace 70 are welded to the upper and lower ends of the steel column material 31 of the column 30. Next, the first side wood pieces 41 are installed on both sides of the steel column material 31 in the width direction (the same direction as the beam width direction of the steel beam material 11) and fixed with tapping screws. After that, the second side wood pieces 42 are installed on both sides (the left and right sides in a side view) in the orthogonal direction perpendicular to the width direction of the steel column material 31 to which the brace 70 is not connected and fixed to the first side wood pieces 41 with wood screws.

[0047] The column installation process is a process of erecting the column 30. The column 30 is installed on the foundation, the foundation beam 10a, or the beam 10. In the column installation process of this embodiment, the column 30 of the first floor is erected on the foundation beam 10a. When erecting the column 30, the protruding portion 35 at the lower end of the steel column material 31 is inserted into the recessed portion 24 (a portion where the upper wooden piece 21 is not attached and the upper flange 14 is exposed) of the foundation beam 10a or the beam 10, and the metal plate 33 at the lower end of the steel column material 31 is placed on the upper flange 14 of the steel beam material 11 of the foundation beam 10a or the beam 10 that was previously installed. Then, a bolt is inserted into the inside of the steel beam material 11 from the groove-shaped opening side of the steel beam material 11, and the bolt is inserted upward from the underside of the upper flange 14 and screwed into a nut welded to the upper surface of the metal plate 33, thereby fixing the column 30 to the foundation beam 10a or the beam 10.

[0048] The beam installation step is a step of installing the beam 10 on the column 30 or the foundation beam 10a on the foundation 2. Before the column 30 is installed, the foundation beam 10a is installed on the foundation 2. When installing the beam 10 on the column 30, the beam 10 is installed so that the protruding portion 34 at the upper end of the steel column material 31 is inserted into the downward recess 25 formed between the lower ends of the pair of side wood pieces 23, 23 in the gap between the lower wood pieces 22 adjacent in the longitudinal direction of the beam wood piece 12, and the lower flange 15 of the steel beam material 11 of the beam 10 is placed on the metal plate 33 at the upper end of the steel column material 31 of the column 30. Then, a bolt is inserted into the steel beam material 11 from the groove-shaped opening side of the steel beam material 11, and the bolt is inserted downward from the upper side of the lower flange 15 and screwed into the nut welded to the lower surface of the metal plate 33. In this way, the beam 10 is fixed to the column 30. After that, the side wood piece 23 is installed on the groove-shaped opening side of the steel beam material 11, and this side wood piece 23 is fixed to the upper wood piece 21 and the lower wood piece 22 with wood screws.

[0049] When the foundation beam 10a is installed on the foundation 2, the foundation beam 10a is installed so that the support portion 3 formed on the foundation 2 is inserted into the downward recess 25 of the foundation beam 10a, and the bottom flange 15 of the steel beam material 11 of the foundation beam 10a is placed on the support portion 3. At this time, the top of the anchor bolt 4 protruding from the upper end of the support portion 3 penetrates the lower flange 15 of the steel beam material 11 and protrudes upward. Then, a nut is inserted into the steel beam material 11 from the groove-shaped opening side of the steel beam material 11 and screwed onto the upper end of the anchor bolt 4. This fixes the steel beam material 11 to the foundation 2. After that, a side piece of wood 23 is installed on the groove-shaped opening side of the steel beam material 11, and this side piece of wood 23 is fixed to the upper piece of wood 21 and the lower piece of wood 22 using wood screws.

[0050] The brace installation process is a process of providing a brace 70 between adjacent columns 30, 30. In the brace installation process, first, the brace components formed in the factory are erected between the upper and lower beams 10 (between the foundation beams 10a and the beams 10), and the columns 30 are fixed to the upper and lower beams 10 (foundation beams 10a) in the same procedure as in the column installation process.

[0051] Then, the studs 65 are installed above and below the connecting plate 73. The convex portion 61 at the upper end of the upper stud 65a is inserted into the downward recessed portion 25 of the beam 10, and a screw is driven from the outside of the side wood 23 toward the convex portion 61 to fix the upper end of the upper stud 65a to the side wood 23 of the beam 10. Then, the step portion 66 at the lower end of the upper stud 65a is abutted against the outer wall surface of the upper end of the connecting plate 73, and a screw is driven from the inside of the connecting plate 73 toward the step portion 66 to fix the lower end of the upper stud 65a to the connecting plate 73. Furthermore, the convex portion 62 at the lower end of the lower stud 65b is inserted into the upward recessed portion 24 of the foundation beam 10a, and a screw is driven from the outside of the side wood 23 toward the convex portion 62 to fix the lower end of the lower stud 65b to the side wood 23 of the foundation beam 10a. Then, the step portion 67 at the lower end of the lower partition 65b is abutted against the outer wall surface of the lower end of the connecting plate 73, and a screw is driven toward the step portion 67 from the inside of the connecting plate 73, fixing the upper end of the lower partition 65b to the connecting plate 73.

[0052] After the wood-covered steel structure 1 (framework up to the foundation 2, columns 30, and beams 30) has been constructed through the above steps, the carpentry process begins. The carpentry process includes stud installation, exterior wall construction, interior wall construction, floor construction, ceiling construction, etc. In the carpentry process, woodwork that can be carried out by a general wood-frame carpenter is carried out.

[0053] The stud installation process is a process of providing a wooden stud 60 between adjacent columns 30, 30. In the stud installation process, the downward convex portion 62 of the lower end of the stud 60 is inserted into the upward concave portion 24 of the foundation beam 10a or beam 10, and the upward convex portion 61 of the upper end of the stud 60 is inserted into the downward concave portion 25 of the beam 10. Then, a screw is driven from the outside of the side wood 23 of the foundation beam 10a or beam 10 toward the convex portion 62 to fix the lower end of the stud 60 to the side wood 23. Meanwhile, a screw is driven from the outside of the side wood 23 of the beam 10 toward the convex portion 61 to fix the upper end of the stud 60 to the side wood 23.

[0054] The exterior wall construction process is a process for forming the exterior wall. In the exterior wall construction process, first, vertical furring strips (or horizontal furring strips) 55 are hung across the studs 60, 65 and the side wooden pieces 23 of the beams 10 and fixed with wood screws. Then, waterproof paper and siding material 56 are attached to the furring strips 55. Note that the exterior wall is not limited to the siding material 56.

[0055] The interior wall construction process is a process for forming the interior walls on the room's side. In the interior wall construction process, first, insulating material is filled between the pillars 30, studs 60, 65, and brace members. After that, an interior wall material or base material (not shown) is laid on the pillars 30 and studs 60, 65 and fixed with wood screws. The interior wall material or base material may be laid via furring strips. At this time, the interior wall material, base material, or furring strips are fixed to the first side wooden piece 41 of the pillars 30 and the wooden studs 60, 65, so this can be done as general woodworking work.

[0056] The floor construction process is a process for forming a floor. In the floor construction process, the joist support 50 is fixed to the side wooden pieces 23 of the beams 10 or foundation beams 10a with wood screws. It is preferable to use an adhesive in combination at this time. The joists 51 are hung across the joist support 50 and fixed with wood screws, and the floorboards 52 are placed on the joists 51 and the upper wooden pieces 21 of the beams 10 and fixed with wood screws or nails. At this time, the joist support 50, the joists 51 and the floorboards 52 are fixed with wood screws or nails, so this can be done as general woodworking work.

[0057] The ceiling construction process is a process for forming a ceiling. In the ceiling construction process, wooden battens 58 that support the rafters are fixed to the pillars 30 and studs 60, 65 with wood screws, and the rafters are fixed to the wooden battens 58 with wood screws or nails. Then, ceiling boards 59 are fixed to the rafters with wood screws or nails. At this time, the wooden battens 58, the rafters, and the ceiling boards 59 are fixed with wood screws or nails, so this can be done as general woodworking.

[0058] The wood-covered steel structure 1 and the method for constructing it according to this embodiment have the following advantages. That is, the side wooden pieces 23 of the beam 10 are arranged along the longitudinal direction of the steel beam 11 and protrude above and below the steel beam 11, so that the construction surface for woodworking is widened and the degree of freedom of woodworking is increased. In addition, the side wooden pieces 23 are fixed to the sides of the upper wooden pieces 21 and the lower wooden pieces 22, so that they can be easily fixed with wood screws or bolts, and construction is easy. Furthermore, the upper wooden pieces 21 and the lower wooden pieces 22 are laid intermittently along the longitudinal direction of the beam 10, so that the upper surface (upper flange 14) or the lower surface (lower flange 15) of the steel beam 11 is exposed to the outside. This allows the end (upper end or lower end) of the steel column 31 of the column 30 to be directly fixed to the steel beam 11.

[0059] In this embodiment, tapping screws are used to fasten the steel beam 11 to the upper wooden piece 21 and the lower wooden piece 22, and to fasten the steel column 31 to the first side wooden piece 41, and wood screws are used to fasten the side wooden piece 23 and the second side wooden piece 42. In other words, tapping screws, which are time-consuming and expensive, are used in limited locations and are installed in the factory, reducing the construction time and cost. Furthermore, at the construction site, the framework is completed by fastening the bolts and nuts, and then exterior and interior construction can be done with general carpentry work.

[0060] In addition, since the first side wood 41 of the column wood 32 and the side wood 23 of the beam wood 12 are formed on the same plane, the vertical furring strips 55 of the exterior wall can be installed through them, making construction easier. Furthermore, since the column wood 32 further has the second side wood 42 that is perpendicular to the first side wood 41, the entire surface of the steel column material 31 can be surrounded by the column wood 32. This allows for even greater freedom in carpentry work.

[0061] Furthermore, the beam wood 12 is divided into an upper wood 21, a lower wood 22, and a side wood 23, and the pillar wood 32 is divided into a first side wood 41 and a second side wood 42. In other words, since each piece of wood 12, 32 is made of relatively small wood, they can be provided at low cost, reducing construction costs.

[0062] The stud 60 can be fixed by inserting the protrusion 61 (62) into the recess 25 (24) and fastening it with screws from the side of the side wooden piece 23, making construction easy and allowing the stud to be fixed in a short time.

[0063] Since the steel beam 11 is made of C-shaped steel (lip channel steel), the wooden beams 12 can be easily fixed to each of the four surfaces (top, bottom and both side surfaces) of the steel beam 11.

[0064] Braces 70 are provided between adjacent columns 30, 30 crossing in an X shape, and studs 65 are connected above and below connecting plates 73 at the intersections of the braces 70, so that the studs 65 can be installed in a well-balanced manner in the middle between adjacent columns 30, 30. The studs 65 can be fixed by inserting the convex parts 61 (62) into the concave parts 25 (24) and fastening them with screws from the side of the side wood 23 side, and can also be fixed by abutting the stepped parts 66, 67 against the connecting plates 73 and fastening them with screws. Therefore, construction is easy and the studs 65 can be fixed in a short time.

[0065] A pair of side wooden pieces 23, 23 each have a notch 26 formed at the lower end thereof at a position corresponding to the downward recess 25 of the beam 10 that becomes the foundation beam 10a, so that an air passage 27 can be formed. This ensures ventilation under the floor of the first floor.

[0066] Although the embodiment of the present invention has been described above, the present invention is not limited to the above-mentioned embodiment, and each of the above-mentioned components can be appropriately modified within the scope of the present invention. For example, in the above-mentioned embodiment, the steel beam material 11 of the beam 10 is made of lip channel steel, but this is not limited to this. The steel beam material 11 may be steel material of other shapes, such as channel steel, H-shaped steel, and square pipe. Furthermore, the steel column material 31 of the column 30 is made of square pipe, but this is not limited to this. The steel column material 31 may be steel material of other shapes, such as lip channel steel, channel steel, and H-shaped steel. [Explanation of symbols]

[0067] 1. Wood-clad steel structure 10 beams 11 Steel beams 12 beam wood 21 Upper wood 22 Lower Timber 23 Side Timber 24 Recess 25 Recess 26 Notch 27 Ventilation Channel 30 Pillars 31 Steel column material 32 pillar wood 41 First side timber 42 Second side timber 60 Studs 61 Convex 62 Convex 65 Studs 70 Brace

Claims

1. A wood-covered steel structure in which steel columns and beams are covered with wood, A steel beam material and a steel column material constituted by the steel frame; A beam timber covering the steel beam material; and a column timber covering the steel column material, The beam timber is An upper wooden piece fixed to an upper portion of the steel beam; A lower wooden piece fixed to the lower part of the steel beam; A pair of side wooden pieces are arranged on both sides of the steel beam in the beam width direction, The upper wooden pieces and the lower wooden pieces have a width dimension equal to that of the steel beam material, and are laid intermittently at predetermined intervals along the longitudinal direction of the steel beam material, The side wooden pieces are arranged along the longitudinal direction of the steel beams, with upper ends protruding upward beyond the upper ends of the steel beams and fixed to the side surfaces of the upper wooden pieces, and lower ends protruding downward beyond the lower ends of the steel beams and fixed to the side surfaces of the lower wooden pieces, The upper end of the steel column protrudes above the upper end of the column wood, and is inserted into a recess formed between the lower ends of a pair of side wood pieces in the gap between the adjacent lower wood pieces in the longitudinal direction of the beam wood, and is fixed to the bottom surface of the steel beam material. A timber-clad steel structure.

2. The pillar timber is A pair of first side wooden pieces are arranged on both sides of the steel column in the width direction, The first side piece is formed flush with the side piece of the beam piece.

2. A timber-clad steel structure according to claim 1.

3. The pillar timber is The steel column further includes a pair of second side pieces arranged on both sides in a direction perpendicular to the width of the steel column.

3. A timber-clad steel structure according to claim 2.

4. Further comprising wooden studs provided between adjacent said studs; The upper ends of the studs are inserted into the recesses and fixed to the lower ends of the pair of side wood pieces.

2. A timber-clad steel structure according to claim 1.

5. The steel beams are made of C-shaped steel.

2. A timber-clad steel structure according to claim 1.

6. Between adjacent columns, braces are provided in an X-shape, Studs extending above and below are connected to the intersections of the braces.

5. A timber-clad steel structure according to claim 4.

7. A pair of side wooden pieces each have a notch formed at a lower end at a position corresponding to a gap between adjacent lower wooden pieces in the longitudinal direction of the wooden beam of the foundation beam.

2. A timber-clad steel structure according to claim 1.

8. A method for constructing a wood-covered steel structure according to any one of claims 1 to 7, comprising: A beam forming process of covering the steel beam material with the beam wood to form a beam; a pillar forming process of covering the steel pillar material with the pillar wood to form a pillar; a pillar installation step of erecting the pillar; and a beam installation step of installing the beam on the column, In the beam forming process, lower wooden pieces having a width dimension equivalent to that of the steel beam material are laid intermittently at a predetermined interval along the longitudinal direction of the steel beam material, and the side wooden pieces are laid so that the lower ends of the side wooden pieces provided on both sides of the width direction of the steel beam material extend downward beyond the lower ends of the steel beam material; In the column forming process, the side wooden pieces are laid on the steel column material so that the upper end portions of the steel column material protrude upward from the upper ends of the side wooden pieces provided on both sides of the steel column material in the width direction; In the beam installation process, the beam is installed so that the upper end of the steel column material is inserted into a recess formed between the lower ends of a pair of side pieces in a gap between the lower pieces adjacent to each other in the longitudinal direction of the beam piece, and the upper end of the steel column material is fixed to the bottom surface of the steel beam material. A method for constructing a timber-clad steel structure.

9. A stud installation step is further included, which provides wooden studs between adjacent studs. In the stud installation step, the end of the stud is inserted into the recess of the beam and fixed to the side wood. A method for constructing a timber-clad steel structure according to claim 8.

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