JP5460514B2 - Fireproof structure of wooden wall - Google Patents

Description

  The present invention relates to a fireproof structure for a wooden true wall, and more particularly to a fireproof structure for a wooden true wall for improving the buckling strength of a column having a square cross section in which a front portion appears on a wall surface to form a true wall.

  Traditional Japanese houses, such as Japanese-style rooms, are made of true wall with pillars and beams. However, in the case of a fire, the structural material is directly heated and burned and carbonized in the event of a fire. It is difficult to ensure non-damage in performance (performance that does not collapse while bearing the load that supports the building even when subjected to fire heating). Securing the non-damage of such a true wall is difficult especially for semi-refractory buildings and fire-resistant buildings that require safety against indoor fires. Since the load-bearing wall of the building in the area needs performance equivalent to the semi-fireproof structure, various techniques for enabling the design of the true wall in these areas have been developed (for example, Non-Patent Document 1, Patent Document). 1, see Patent Document 2).

2000 Ministry of Construction Notification No. 1358 No. 2

JP 2006-132163 A JP 2010-7411 A

  The burn-in design of Non-Patent Document 1 is to thicken the column cross-section in consideration of the cross-section lost by combustion, and the interior wall structure of Patent Document 1 suppresses the burning of the column using a thermally expandable refractory material. However, as for the pillars of general wooden houses, those having a cross section of 105 mm square or 120 mm square are used, whereas in the non-patent document 1 burn-in design, 175 mm square or more, Patent Document 1 In the interior wall structure of the present invention, it is necessary to use a column member having a medium cross section of 455 × 105 mm or more, and thus there is a problem that it is difficult to adopt in a residential room that tends to be small.

  In addition, the pillar fireproof structure of the wooden true wall of Patent Document 2 uses a column material having a 105 mm square cross section, a large wall specification on one side, and a thick receiving material (75 × 105 mm) on the side of the column with a predetermined adhesive It is comprised by attaching a half pillar material or L-shaped hardware to the large wall side of the pillar using a predetermined adhesive, but these receiving material, half pillar material and L Since it is necessary to apply an adhesive to substantially the entire joint surface so that these members can be deformed integrally with the pillar, the attachment of the metal fitting takes a lot of time and labor.

  Further, the fireproof structure of a wooden true wall of Patent Document 2 is mainly intended for an outer wall having a large wall specification on one side of the wall, and is mainly used for a partition bearing wall having a true wall specification on both sides of the wall. When applied, it is necessary to develop new technologies.

  The present invention is mainly applied to a partition bearing wall in which both sides of the wall are of a true wall specification and can be easily provided, for example, at the time of renovation of a building, and when the wall of the true wall is directly heated from the indoor side during a fire. Another object of the present invention is to provide a fireproof structure of a wooden true wall that can effectively compensate for a decrease in the buckling strength of a column and can continue to support a load from above for a long time.

  The present invention is a fireproof structure of a wooden true wall for improving the buckling strength at the time of fire of a wooden column having a square cross section in which a front portion appears on a wall surface to form a true wall, and is provided on a side portion of the column. A wooden support member having a square cross section to which a wall surface material is joined is attached using screws or nails over substantially the entire length of the pillar, and includes two sides connected at right angles. An additional reinforcing metal fitting having a U-shaped cross-sectional shape (including a C-shaped cross-sectional shape), an L-shaped cross-sectional shape, or a B-shaped cross-sectional shape is provided with one side portion of the two side portions continuously provided at a right angle. By joining the outer side surface of the wood receiving material with a screw, the outer side surface of the wooden receiving material is arranged with the other side portion disposed along the inner side surface of the wall surface material. Providing a fireproof structure of a wooden wall that is attached along the part over a length region of 30% or more of the pillar. By, in which to achieve the above objects.

  And as for the fireproof structure of the wooden true wall of this invention, it is preferable that the said wooden backing material and the said supplementary reinforcement metal fitting are attached along the side part of the both sides of the said pillar.

  Further, in the fireproof structure of the wooden true wall of the present invention, the pair of front and back front portions of the pillar both appear on the wall surface to form a true wall, and the pair of front and back wall face materials have end faces on the side surfaces of the pillar. It is preferable that each of the end portions is abutted with each other, and the inner side surfaces of the end portions are attached in close contact with the side surface portions on the side of the wood receiving member.

  Furthermore, the fireproof structure of the true wooden wall of the present invention has a U-shaped cross-sectional shape (C-shape) in which the additional reinforcing hardware includes a pair of overhanging side portions that are connected at right angles from the side edge portions on both sides of the intermediate side portion. Including a cross-sectional shape) or a B-shaped cross-sectional shape, joining the intermediate side portion along an outer side surface portion of the wood receiving material, and a pair of the projecting side portions on the front and back pair of the walls It is preferable to attach in the state arrange | positioned along the inner surface of a surface material.

  Furthermore, in the fireproof structure of the wooden true wall of the present invention, the screw that joins the additional reinforcement hardware to the wooden support material has a length that passes through the additional reinforcement hardware and the wooden reception material and reaches the pillar. It is preferable that a plurality of the reinforcing metal fittings are driven at a predetermined pitch in the length direction.

  Further, in the fireproof structure of the wooden true wall according to the present invention, the screws for joining the additional reinforcing hardware to the wooden receiving material are disposed in a staggered manner in two rows in the length direction of the additional reinforcing hardware. Preferably it is.

  According to the fireproof structure of the true wooden wall of the present invention, it is constructed mainly on the partitioning load-bearing wall where both sides of the wall are of the true wall specification. When receiving direct heating from the inside, it is possible to effectively compensate for the decrease in the buckling strength of the column and continue to support the load from above for a long time.

It is a principal part perspective view explaining the structure of the true wall which employ | adopted the fireproof structure of the wooden true wall which concerns on preferable one Embodiment of this invention. It is principal part sectional drawing explaining the structure of the fireproof structure of the wooden true wall which concerns on preferable one Embodiment of this invention. (A), (b) is a front view of the column of the state which removed the surface material for walls explaining the attachment position of an attachment reinforcement metal fitting. (A), (b) is principal part sectional drawing which shows the other form of the fireproof structure of the wooden true wall of this invention. (A)-(d) is principal part sectional drawing which illustrates further another form of the fireproof structure of the wooden true wall of this invention. It is the schematic front view of the test body used for the quality performance test of the partition bearing wall.

  As shown in FIG. 1, the fireproof structure 10 of a true wooden wall according to a preferred embodiment of the present invention is preferably used as a building provided in a disaster prevention area or the like, preferably in a wooden house building by a conventional frame construction method. The partition bearing wall 11 for partitioning the living room part is a true wall 13 in which the front part 12a of the wooden pillar 12 having a square cross section appears on both the pair of front and back wall surfaces 11a, 11b, and the living room parts on both sides are, for example, a quaint Japanese-style room In addition to being able to be used as a Western-style room, such a true wall 13 preferably has a fireproof performance of 45 minutes for a quasi-refractory structure for non-damage, which is a performance that continues to support a building even when heated from a living room during a fire. It is adopted in order to be able to effectively reinforce the column 12 of the true wall 13 so as to be provided.

  And the fireproof structure 10 of the wooden true wall of this embodiment is the buckling of the wooden pillar 12 having a square cross section in which the front portion 12a appears on the wall surfaces 11a and 11b of the partition bearing wall 11 to form the true wall 13 at the time of fire. As shown in FIG. 2, a wood receiving material 16 having a square cross section to which a wall surface material 15 is joined along the side surface portion 12 b of the column 12 is provided. Are attached using screws or nails (see FIGS. 3A and 3B) and have a U-shaped cross-sectional shape including two side portions 17a and 17b arranged at right angles. By attaching one side portion 17a of the two side portions 17a and 17b connected at right angles to the outer side surface portion 16a of the wood receiving member 16 using screws 18, Side 17b of the wall along the inner surface of the wall face 15 In location state, trees receiving member 16 outside of the side surface portion 30% or more are attached over the length region of the pillar 12 along the 16a (FIG. 3 (a), (b) refer).

  In the present embodiment, as described above, the pair of front and back front portions 12a of the pillar 12 appear on the wall surfaces 11a and 11b of the partition bearing wall 11 to form the true wall 13, and the pair of front and back wall surfaces. The material 15 is attached in a state where the end surface 15 a is in contact with the side surface portion 12 b of the column 12 and the inner side surface of the end portion is in close contact with the side surface portion 16 b on the side of the wood receiving material 16.

  Further, in the present embodiment, the attached reinforcing hardware 17 includes a pair of overhanging side portions (the other side portion) 17b that are provided at right angles from the side edge portions on both sides of the intermediate side portion (one side portion) 17a. The intermediate side portion 17a is joined along the outer side surface portion 16a of the wood receiving member 16, and the pair of overhanging side portions 17b are connected to the front and back pair of wall surface materials 15. It is attached in a state of being arranged along the inner surface.

  In the present embodiment, as shown in FIG. 1, the partition bearing wall 11 is sandwiched between the pillar 12, the front and back wall face materials 15, and the wall face material 15, and is adjacent to the pillar 12. It is comprised by the stud 19 arrange | positioned between. Moreover, the space | interval part 20 between the surface materials 15 for front and back walls is filled with the heat insulating material 21 which consists of glass wool etc. for improving fireproof performance.

  The pillar 12 is made of, for example, a wooden square bar having a square cross section of 105 × 105 mm. As shown in FIGS. 3 (a) and 3 (b), the column 12 has a length of, for example, about 2880 mm between the lower base 22 and the upper beam 23, and includes a mounting jig. The bending length is 3000 mm, and a load applied from above via the beam 23 is supported and can be transmitted to the base 22 below. Further, as shown in FIGS. 1 and 2, the pillar 12 has a pair of front and back front portions 12 a slightly projecting outward from the wall face material 15, and wall surfaces 11 a on both sides of the partition bearing wall 11. 11b is attached so that the front portion 12a appears, and both sides of the partition bearing wall 11 are the true wall specifications.

  Each of the wall surface materials 15 constituting the pair of front and back wall surfaces 11a and 11b is made of, for example, a gypsum board having a thickness of about 12.5 mm, and the end surface 15a is formed on the side surface portion 12b of the column 12 as shown in FIG. In the state where the inner side surface of the end portion is brought into close contact with the side surface portion 16b on the side of the wood receiving member 16 to be described later, fixing brackets such as fixing screws, fixing screws and fixing nails are attached to the wooden receiving member 16. Further, it is fixed by driving toward the spacer 18 to form the wall surfaces 11 a and 11 b on both sides of the partition bearing wall 11.

  In the present embodiment, the wood receiving member 16 and the attached reinforcing hardware 17 are disposed at the side portions 12b on both sides of the pillar 12 in the interval portion 20 having a width of, for example, about 40 to 45 mm between the front and back wall surface members 15. Attached along.

  Each of the wood receiving members 16 is made of a wooden square member having a square cross section of 30 × 45 mm, for example, as a cross section smaller than the pillar 12. The wood receiving member 16 is slightly shorter than the pillar 12 and has a length of about 2660 mm, for example, which is approximately the same length as this (see FIGS. 3A and 3B). Thus, it is attached to the side surface portions 12b on both sides of the column 12 in a state where the load applied from above is not supported. Further, the wood receiving member 16 has a predetermined screw or nail (not shown) facing the pillar 12 in a state where the inner side face 16c thereof is in close contact with the side face 12b of the pillar 12 (see FIG. 2). Are attached to the central portion in the width direction of the side surface portion 12b of the column 12, and are joined and integrated over substantially the entire length along the longitudinal direction of the column 12.

  Here, since the wooden receiving material 16 is attached to the column 12 without supporting a load applied from above, it can be easily joined to the existing column 12 as a renovation work at the time of renovation of a building, for example. In addition, since the wood receiving material 16 is attached to the side surface portion 12b of the column 12 using screws or nails, compared to the case where the adhesive is applied to substantially the entire area of the bonding surface and bonded to the column 12 integrally, It becomes possible to perform construction easily without requiring much time and labor. Further, the wood receiving material 16 functions as a base member for fastening the wall surface material 15, functions to suppress the burning of the side surface portion 12 b of the column 12 in the event of a fire, or until the column 12 is not burned. It also demonstrates the function of bearing compression strength.

  The attached reinforcement hardware 17 is a metal hardware formed by bending a hot-dip galvanized steel sheet having a thickness of about 3.2 mm, for example, and includes, for example, an intermediate side portion 17a and a pair of overhang side portions 17b. In addition to having a length of about 40 mm, it has a U-shaped cross-sectional shape in which two corners are bent at right angles via the R part. The attached reinforcing hardware 17 is 30% or more, preferably 60% of the length of the column 12 (the length between the upper and lower beams and the base, or the length between the upper and lower beams and the beam). The length is, for example, about 2000 mm (see FIGS. 3A and 3B), and the intermediate side portion 17 a is brought into close contact with the outer side surface portion 16 a of the wood receiving member 16. At the same time, in a state where the pair of overhanging side portions 17b are respectively arranged along the inner side surface of the front and back wall surface materials 15 (see FIG. 2), a plurality of screws 18 are passed through the intermediate side portion 17a to receive the wood receiving material 16. Further, by being driven toward the pillar 12, they are joined and integrated along the longitudinal direction of the wood receiving member 16 so as to overlap with the outer side surface portion 16 a of the wooden receiving member 16.

  Here, in the present embodiment, the screw 18 that joins the additional reinforcing hardware 17 to the wood receiving member 16 has a length that passes through the intermediate side portion 17 a of the additional reinforcing hardware 17 and the wooden receiving material 16 and reaches the column 12. And a plurality of the reinforcing metal fittings 17 are driven at a predetermined pitch of, for example, about 50 to 200 mm. The screws 18 are preferably driven in a staggered arrangement in two rows in the length direction of the attached reinforcing hardware 17.

  Since the screw 18 has a length that passes through the additional reinforcement hardware 17 and the wooden support material 16 and reaches the column 12, the additional reinforcement hardware 17 and the wooden reception material 16 are seated integrally with the column 12. It becomes possible to resist bending. In addition, even if the screws 18 are driven in two rows in a staggered manner, the one row of screws 18 on the heating side does not function due to the burning of the surrounding pillars 12 and the wood support 16, and one row of screws on the non-heating side. Since the joining state can be ensured for a certain period of time at 18, it is possible to maintain the reinforcing effect by the additional reinforcing hardware 17 and the wood receiving material 16 for a longer time than when the screws 18 are driven in one row.

  In the present embodiment, the attached reinforcement hardware 17 is 30 to 100% of the length of the pillar 12 along the outer side surface portion 16a of the wooden support member 16, as shown in FIGS. 3 (a) and 3 (b). Attached over area. In addition, it is preferable that the attached reinforcement hardware 17 is attached over a length region of 60 to 100% of the column 12, and more preferably, is attached over a length region of 60 to 90% of the column 12. If the length region to which the supplementary reinforcement hardware 17 is attached is too long, there will be a problem that it may interfere with the reinforcement hardware such as hole-down hardware or bracing hardware that is often used for the stigma and column base, which is too short. And the malfunction that the function which improves buckling proof strength cannot fully be exhibited arises. The position at which the additional reinforcing hardware 17 is attached to the wood receiving member 16 may be the central portion in the vertical direction (see FIG. 3A), or the upper or lower portion (see FIG. 3B).

  The attached reinforcing hardware 17 is integrally attached to the outside of the wood receiving member 16 and exhibits the function of improving the non-damage of the wooden true wall by improving the buckling strength of the column 12.

  And, according to the fireproof structure 10 of the wooden true wall of the present embodiment having the above-described configuration, it can be easily provided, for example, at the time of renovation of a building, and the wall surfaces 11a and 11b of the true wall 13 are directly heated from the indoor side at the time of fire. When received, it can effectively compensate for the decrease in the buckling strength of the column 12 and continue to support the load from above for a long time.

  That is, according to the present embodiment, the wood receiving member 16 and the attached reinforcement hardware 17 that reinforce the pillar 12 of the true wall 13 are attached to the pillar 12 in a state that neither supports the load applied from above, Since it can be easily attached to the side surface portion 12b of the column 12 using nails or screws 18 without applying an adhesive to almost the entire area of the joint surface, a new installation after assembling an existing column or structural material It is possible to effectively reinforce the pillars and improve the non-damage of the true wall 13. This also allows existing large-wall partitions to be changed to true-wall specifications while maintaining the performance of fireproof and semi-fireproof structures, and is not damaged, for example, in historical buildings. It is possible to easily upgrade a true wall that is not suitable for fireproofing to a fireproof structure or semi-fireproof structure that complies with laws and regulations.

  Further, according to the present embodiment, the wood receiving member 16 and the attached reinforcing hardware 17 are attached to the side surface portion 12b of the column 12 at the interval portion 20 between the front and back wall surface materials 15, so that the true wall 13 By the action of dispersing and absorbing the compressive / eccentric bending stress concentrated on the remaining cross section of the column 12 in the event of a fire by the wood receiving material 16 and the attached reinforcing hardware 17 which are integrally joined without affecting the appearance of the column. Thus, it is possible to effectively reinforce the tensile strength at the front portion 12a. As a result, the front surface portion 12a of the column 12 is directly heated in the event of a fire and burns and carbonizes to cause a cross-sectional defect, and even if the internal temperature of the column 12 increases and the Young's modulus decreases, It becomes possible to effectively resist the buckling of the column 12 in a state in which the generated front portion 12a is bent inward by the improvement of the tensile strength by the wooden support member 16 and the attached reinforcement hardware 17, This compensates for the decrease in buckling strength, improves the undamaged property of the true wall 13 that does not collapse while maintaining the load that supports the building even when subjected to fire heating, and applies the load from the building for as long as possible. It becomes possible to continue to support.

  4 (a) and 4 (b) show a fireproof structure 10 ′, 10 ″ for a wooden wall according to another preferred embodiment of the present invention. The fireproof structure shown in FIGS. 4 (a) and 4 (b). 10 ′ and 10 ″ have substantially the same configuration as the fireproof structure 10 of the above embodiment, but the additional reinforcement hardware 17 joined to the outer side surface portion 16 a of the wooden support 16 using screws 18. In other words, in the refractory structure 10 ′ shown in FIG. 4 (a), the additional reinforcing hardware 17 ′ includes two side portions 17a ′ and 17b ′ that are connected at right angles. It has an L-shaped cross-sectional shape, and one side portion 17a 'is joined to the outer side surface portion 16a of the wood receiving member 16 using screws 18, so that the other side portion 17b' is connected to one wall surface. Attached along the outer side surface portion 16a of the wood receiving material 16 in a state of being arranged along the inner side surface of the material 15. In addition, in the fireproof structure 10 ″ shown in FIG. 4 (b), the additional reinforcing hardware 17 ″ is connected to each other at right angles from the side edge portions on both sides of the intermediate side portion (one side portion) 17a ″. And a projecting side portion (the other side portion) 17b ″ including a rectangular cross-sectional shape, and joining the intermediate side portion 17a ″ along the outer side surface portion 16a of the wooden support 16 and a pair of The overhang side portions 17b "are attached in a state where they are arranged along the inner side surfaces of the front and back wall face members 15, respectively.

  4 (a) and 4 (b), the wooden wall fireproof structure 10 ', 10 "also includes the wooden support 16 attached to the side surface 12b of the column 12 and the attached reinforcement hardware 17', 17". By reinforcing and compressing the tensile strength of the column 12 by dispersing and absorbing the compressive / eccentric bending stress concentrated on the remaining cross section of the column 12 in the event of a fire, the same effects as the fire resistant structure 10 of the above embodiment are exhibited. .

  The present invention is not limited to the above-described embodiments, and various modifications can be made. For example, as shown in FIG. 5A, the fireproof structure of the wooden true wall of the present invention is configured without filling the space portion 20 between the front and back wall face materials 15 with a heat insulating material made of glass wool or the like. You can also. As shown in FIG. 5 (b), it is also possible to attach the wood receiving material 16 to the side surface portions 12b on both sides of the column 12, and to attach the additional reinforcing hardware 17 only to the one side surface portion 12b. As shown in FIG. 5 (c), one wall surface 11a of the partition bearing wall 11 is made into a true wall structure and the other wall surface 11b is made into a large wall structure, and is in close contact with the back surface on the large wall 24 side. It is also possible to attach the wood receiving material 16 and the attached reinforcing hardware 17 to the side surface portion 12b. As shown in FIG. 5 (d), one wall surface 11 a of the partition bearing wall 11 is made into a true wall structure and the other wall surface 11 b is made into a large wall structure, and the wooden support 16 is attached to the side surface portion 12 b on one side of the column 12. In addition, a pair of additional reinforcing hardware 17 can be attached.

  That is, according to the present invention, the cross-sectional dimension, cross-sectional shape, mounting method, and the like of the wooden backing material and the attached reinforcing hardware 17 are appropriately selected according to the target non-damage and surrounding fit, A fireproof structure can be constructed.

  Moreover, the fireproof structure of the wooden true wall of the present invention can be adopted not only when renovating a building but also when providing a wooden true wall when building a new building.

  Hereinafter, although the fireproof structure of the wooden true wall of the present invention will be described in more detail by way of examples, the present invention is not limited thereto.

Examples 1 and 2
A test body with the specifications shown in FIG. 6, which has the same configuration as the fireproof structure 10 of the wooden true wall according to the embodiment shown in FIGS. 1 and 2, was used as the test body of Example 1. A test body having substantially the same configuration as the test body of Example 1 except that glass wool was not filled was used as the test body of Example 2. For the specimens of Example 1 and Example 2, a quality performance test (same condition as the Minister's accreditation test) on the double-walled shear wall was performed at the Building Materials Testing Center, and a quasi-fire resistance of 45 minutes or more It was confirmed to have The outline of the test is shown below. The test results are shown in Table 1.

[Specimen specifications]
The test body was a true wall specification showing both sides of the pillar shown in FIG. The test body is an actual large-scale wall test body having a width of 3000 × height of 3230 mm, and a column 12 made of 105 mm square excess laminated material is arranged at the center. In the test body of Example 1, a 30 × 45 mm intermediate column 19 is used. In the test body of Example 2, 30 × 40 mm spacers 19 were attached at intervals of 455 mm. In both cases, the 30 × 45 mm wooden support 16 is attached to the both sides of the column 12 hidden in the wall, and the 30 × 40 mm wooden support 16 is attached to the test specimen of Example 2, and 3 A 2000 mm long reinforcing metal fitting 17 having a U-shaped cross-sectional shape of 2 × 40 × 40 mm was attached. The material of the attached reinforcement hardware 17 was SGHC for the test body of Example 1 and SPHC for the test body of Example 2. All of the attached reinforcing hardware 17 were fastened to the side surface of the pillar 12 with a screw at intervals of 100 mm with a screw so as to sandwich the wood receiving material 16. As the wall surface material 15, 12.5 mm of reinforced gypsum board is used in the test body of Example 1, 15 g of reinforced gypsum board is used in the test body of Example 2, and 10 K − is obtained as glass wool 21 only in the test body of Example 1. 50 mm was filled.

〔Test method〕
The test was performed using the vertical furnace of the Building Materials Testing Center, and the loading heating according to ISO834 was performed according to the business method manual of the laboratory. Loading is a load of 22.1 kN (105 mm square, L = 3230 mm, same-grade laminated material E65-F255, reference strength Fc = 20.6 N / mm ² ) corresponding to the long-term allowable stress on the central column 12. It was over. Evaluation of fireproof performance is flameproof (no fire penetration to the back side), heat shield (the backside temperature is 180 ° C higher than the initial value, average 140 ° C not rising), non-damaging The goal was to satisfy the three points of 45 minutes (the amount of shrinkage in the shaft assembly direction was 32.3 mm and the shrinkage rate did not exceed 9.7 mm / min).

  According to the test results shown in Table 1, the test body of Example 1 and the test body of Example 2 both satisfyed the flameproof property, the heat shield property, and the non-damage property of heating for 45 minutes, and the quasi-fire resistance of 45 minutes or more. It has been confirmed that it has the fire resistance performance. In addition, the test body of Example 1 was able to continue the test until 55 minutes when the back surface temperature exceeded the specified value, and the test body of Example 2 until 53.5 minutes when the axial displacement speed exceeded the specified value. It was also found that the test specimens of No. 1 had a sufficient margin for fire resistance.

10, 10 ', 10 "Fireproof structure of wooden true wall 11 Partition bearing walls 11a, 11b Wall surface 12 Column 12a Column front surface 12b Column side surface 13 True wall 15 Wall surface material 16 Wood receiving material 16a Outside side surface portion 16b Side surface portion 16c Inner side surface portions 17, 17 ', 17 "Additional reinforcement hardware 17a, 17a', 17a" One side portion (intermediate side portion)
17b, 17b ', 17b "the other side (overhang side)
18 Screw 19 Spacer 20 Spacing portion 21 between front and back wall face materials

Claims (6)

A fireproof structure of a wooden true wall for improving the buckling strength in the event of a fire of a wooden column having a square cross section where the front part appears on the wall surface to form a true wall,
A wooden receiving material having a square cross section to which a wall surface material is joined along the side surface portion of the pillar is attached using screws or nails over substantially the entire length of the pillar,
An additional reinforcing metal fitting having a U-shaped cross-sectional shape including two sides connected at right angles, an L-shaped cross-sectional shape, or a B-shaped cross-sectional shape is one of the two sides connected at right angles. By joining the side portion to the outer side surface portion of the wood receiving material with a screw, the other side portion is arranged along the inner side surface of the wall surface material, and the outside of the wooden receiving material is A fireproof structure of a true wooden wall that is attached along a side surface of the column over a length region of 30% or more of the pillar.   The fireproof structure of a wooden true wall according to claim 1, wherein the wooden support material and the attached reinforcing hardware are attached along side portions on both sides of the pillar.   A pair of front and back front portions of the pillars appear on the wall surface to form a true wall, and the pair of front and back wall surface materials abut the end surfaces of the side surfaces of the pillars and The fireproof structure for a true wooden wall according to claim 1 or 2, wherein the side wall is attached in a state of being in close contact with the side surface portion on the side of the wooden support member.   The additional reinforcing hardware has a U-shaped cross-sectional shape or a B-shaped cross-sectional shape including a pair of overhanging side portions that are provided at right angles from side edges on both sides of the intermediate side portion, and the intermediate side portion Are attached along the outer side surface portion of the wood receiving member, and the pair of projecting side portions are respectively disposed along the inner side surfaces of the pair of front and back wall surface materials. 3. A fireproof structure of a wooden true wall according to 3.   A screw for joining the additional reinforcement hardware to the wooden support material has a length that penetrates the additional reinforcement hardware and the wooden reception material to reach the pillar, and the length of the additional reinforcement hardware. The fireproof structure for a wooden true wall according to any one of claims 1 to 4, wherein a plurality of the walls are driven in a predetermined pitch at a predetermined pitch.   The fireproof structure of a wooden true wall according to claim 5, wherein the screws for joining the additional reinforcement hardware to the wood receiving material are driven in a staggered arrangement in two rows in the length direction of the additional reinforcement hardware.

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