Woody fire-resistant coated steel member and method for constructing the same

Abstract

To provide a woody fire-resistant coated steel member which can prevent combustion progression to the inside of wood between flanges, and a method for constructing the same.SOLUTION: A woody fire-resistant coated steel member comprises: a steel member 16 made of an H-shaped steel having a web 10 and flanges 12, 14; a woody backing material 18 provided so as to be filled into a recessed part space 26 defined by the web 10 and the flanges 12, 14; and fire-resistant coating materials 20, 22 provided so as to continuously coat from the outside of the woody backing material 18 over the end parts and outsides of the flanges 12, 14.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a fire-resistant wood-coated steel frame member and a method for installing the same. [Background technology]

[0002] It has been known to use wood, a renewable resource with the effect of immobilizing carbon dioxide, as a fire-resistant covering for steel beams in order to reduce the environmental impact in the construction industry. For example, Patent Document 1 shows a steel beam formed from H-shaped steel with a wood-based fire-resistant covering around it. This steel beam has upper and lower flanges that face each other in the vertical direction and a web connecting them, with a slab installed on top of the upper flange. The wood-based fire-resistant covering is attached to the steel beam via base materials installed on both ends of the upper and lower flanges. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-84597 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in order to increase the amount of carbon dioxide fixed and enhance the effect of reducing environmental impact, it is desirable to also fill the spaces between the upper and lower flanges of the steel beams with wood. However, in the event of a fire, if the wood filled between the flanges were to burn to its interior, it could cause the steel beams to heat up and lead to the collapse of the structure. In particular, if the fire is heated for more than two hours, it becomes difficult for the wood to "stop burning," which could easily lead to a rise in the temperature of the steel beams. For this reason, a structure was needed that would prevent the wood between the flanges from burning to its interior. Note that "stop burning" here refers to the phenomenon in which the wood self-extinguishes after the fire has stopped heating.

[0005] Furthermore, when applying fire-resistant coating to steel beams, distortion of the steel frame makes it difficult to install the fire-resistant coating, so there was a need for a method of applying fire-resistant coating that would not be affected by distortion of the steel frame.

[0006] The present invention has been made in consideration of the above, and aims to provide a wood-based fire-resistant coated steel frame component and an installation method therefor that can prevent combustion from progressing into the wood between the flanges. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems and achieve the object, the fire-resistant wood-coated steel frame component of the present invention is characterized by comprising a steel frame component made of H-shaped steel having a web and a flange, a wood base material arranged to fill the recessed space formed by the web and the flange, and a fire-resistant coating material arranged to continuously cover from the outside of the wood base material to the end and outside of the flange.

[0008] Another fire-resistant wood-coated steel member according to the present invention is characterized in that, in the above-mentioned invention, the wood base material is arranged so as to protrude outward beyond the end of the flange.

[0009] Another fire-resistant wood-coated steel frame component according to the present invention is characterized in that, in the above-mentioned invention, a wood-coated decorative material is provided on the outside of the fire-resistant coating material.

[0010] Another fire-resistant wood-based coated steel member according to the present invention is characterized in that, in the above-mentioned invention, the fire-resistant coating material is a laminated arrangement of a non-fire-resistant wood-based coating material and a fire-resistant wood-based coating member.

[0011] Another fire-resistant wood-coated steel member according to the present invention is characterized in that, in the above-mentioned invention, the non-fire-resistant wood coating material is composed of a plurality of reinforced gypsum boards stacked in the thickness direction, and the joints formed in each of the reinforced gypsum boards that are adjacent in the thickness direction are shifted in the width direction of the reinforced gypsum boards so that they do not overlap in the thickness direction.

[0012] In addition, the method for installing fire-resistant wood-based coated steel frame components according to the present invention is a method for installing the above-mentioned fire-resistant wood-based coated steel frame components, characterized in that after fastening the wood base material to the recess space, the fire-resistant coating material is fastened to the outside of the wood base material and to the end and outside of the flange. [Effects of the Invention]

[0013] The fire-resistant wood-based steel frame component of the present invention comprises a steel frame component made of H-shaped steel having a web and a flange, a wood base material that is arranged to fill the recessed space formed by the web and the flange, and a fire-resistant coating material that is arranged to continuously cover the outside of the wood base material from the outside to the ends and outside of the flange, thereby achieving the effect of effectively suppressing the progression of combustion into the wood base material between the flanges.

[0014] In addition, according to another fire-resistant wood-based coated steel frame component of the present invention, the wood base material is arranged to protrude outward from the end of the flange, which has the effect of allowing the fire-resistant coating material to be easily fastened and installed to the wood base material without being affected by distortion of the steel frame component.

[0015] In addition, according to another fire-resistant wood-coated steel frame component of the present invention, a wood decorative material is provided on the outside of the fire-resistant coating material, which has the effect of imparting a desired design.

[0016] In addition, according to another wood-based fire-resistant coated steel member of the present invention, the fire-resistant coating material is a laminated arrangement of non-wood-based fire-resistant coating material and wood-based fire-resistant coating members, which has the effect of improving fire resistance performance.

[0017] In addition, according to another fire-resistant wood-coated steel frame component of the present invention, the non-fire-resistant wood coating material is composed of a plurality of reinforced gypsum boards stacked in the thickness direction, and the joints formed in each of the reinforced gypsum boards that are adjacent in the thickness direction are offset in the width direction of the reinforced gypsum boards so that they do not overlap in the thickness direction, thereby achieving the effect of suppressing heat input to the wood base material through the joints.

[0018] Furthermore, according to the method for installing fire-resistant wood-based coated steel frame components of the present invention, the method for installing the fire-resistant wood-based coated steel frame components described above involves fastening the wood base material to the recess space, and then fastening the fire-resistant coating material to the outside of the wood base material and to the ends and outside of the flange, thereby achieving the effect of easily installing fire-resistant wood-based coated steel frame components. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a vertical cross-sectional view showing a first embodiment of a fire-resistant wood-coated steel frame member and a method for installing the same according to the present invention. [Figure 2] FIG. 2 is a vertical cross-sectional view showing a second embodiment of a fire-resistant wood-coated steel frame member and a method for installing the same according to the present invention. [Figure 3] FIG. 3 is a horizontal cross-sectional view showing a third embodiment of a fire-resistant wood-coated steel frame member and a method for installing the same according to the present invention. [Figure 4] Figure 4 shows an outline of the fire resistance test, where (1) is a vertical cross-sectional view of the test specimen and (2) is a side view including the test equipment. [Figure 5] FIG. 5 shows the results of the fire resistance test. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, embodiments of a fire-resistant wood-coated steel frame member and an application method therefor according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments.

[0021] (Embodiment 1) First, a first embodiment of the present invention will be described. As shown in Fig. 1, the fire-resistant wood-coated steel frame component 100 according to the first embodiment includes a steel frame component 16 made of an H-shaped steel beam having a web 10, an upper flange 12, and a lower flange 14, a wood base material 18, a non-wood fire-resistant coating material 20, and a wood fire-resistant coating material 22. The fire-resistant coating material is a laminated arrangement of the non-wood fire-resistant coating material 20 and the wood fire-resistant coating material 22. The fire-resistant wood-coated steel frame component 100 is used as a steel beam. A floor material 24 such as concrete or ALC is provided on the upper surface of the upper flange 12.

[0022] The wooden base material 18 is a base material with a substantially rectangular cross section that is provided to fill the recessed space 26 defined by the web 10 and the upper and lower flanges 12, 14, and is used as a base for fastening the non-wood fire-resistant covering material 20 and the wood fire-resistant covering material 22. By filling and arranging the wooden base material 18 in the recessed space 26, it is possible to efficiently increase the amount of wood used. The wooden base material 18 has a density of, for example, 0.45 g / cm 3 The non-wood fire-resistant covering material 20 can be easily fastened to the wooden base material 18 without being affected by distortion of the steel frame member 16. The protrusion length is preferably about 3.5 mm.

[0023] A gap of about 3.5 mm may be provided between the wooden base material 18 and the upper and lower flanges 12, 14. This absorbs distortion of the steel frame member 16 and makes it easier to install the wooden base material 18. The wooden base material 18 may be divided and spaced apart in the axial direction of the beam. This allows heat entering the wooden base material 18 to be dissipated into the recessed spaces 26 between the wooden base materials 18, suppressing temperature increases, making it easier to stop the wood from burning and ensure fire resistance.

[0024] Next, a method for attaching the wooden base material 18 will be described. The upper and lower sides of the web 10 are each provided with a through-hole 28 that penetrates the web 10 in the left-right direction. These through-holes 28 are provided at a predetermined interval in the direction in which the web 10 extends (the front-to-rear direction perpendicular to the plane of FIG. 1 or the axial direction of the beam). Corresponding to the through-holes 28 in the web 10, through-holes 30 are also provided in the wooden base material 18 on both the left and right sides. A bolt 32 is inserted into each through-hole 28, 30 to secure the web 10 and the wooden base material 18 together. A head 34 of the bolt 32 abuts against the side of a recess 36 provided in the outer surface of the right-side wooden base material 18 via a plate 38, and a tip 40 of the bolt 32 protrudes into the recess 36 provided in the outer surface of the left-side wooden base material 18. A nut 44 is threadedly fitted to this tip 40 with a plate 42 sandwiched therebetween, and the nut 44 is tightened toward the side of the recess 36. The left and right wooden base materials 18 are fixed to the web 10 by the bolts 32 and nuts 44.

[0025] Alternatively, or in addition to this configuration, a friction material may be attached to the boundary surface between the web 10 and the wooden substrate 18, and the two may be integrated by fastening with bolts 32. If necessary, an adhesive may also be used to bond the web 10 and the wooden substrate 18 together. The upper through-holes 28 and the lower through-holes 28 may be provided alternately in the extending direction of the web 10. The through-holes 28 are not limited to two locations, one at the top and one at the bottom of the web 10, but may be provided in any one location (for example, the center) or in multiple locations spaced apart in the vertical direction.

[0026] The non-wood fire-resistant coating material 20 is a reinforced gypsum board that is provided to continuously cover the outer surface (outside) of the wood base material 18, extending from the left and right ends of the upper and lower flanges 12, 14 and the lower surface (outside) of the lower flange 14. The reinforced gypsum board can be formed from multiple sheets stacked in the thickness direction. Among the multiple reinforced gypsum boards, the joints formed in adjacent reinforced gypsum boards in the thickness direction are preferably offset in the width direction of the reinforced gypsum boards so as not to overlap in the thickness direction. In the first embodiment, two flat reinforced gypsum boards 20A are overlapped on the side of the wood base material 18, and the joints 46 of each board are offset. The offset width L of the joints 46 is preferably approximately 100 mm. By offsetting the joints 46, heat input to the wood base material 18 through the joints 46 can be suppressed. The upper end surface of the reinforced gypsum board 20A is joined to the lower surface of the floor material 24.

[0027] A steel base material 48, which serves as a fastening base, is attached to the underside of the lower flange 14, and a flat reinforced gypsum board 20B is attached via this steel base material 48. Because the reinforced gypsum board 20B does not contact the wood base material 18, overlapping is not necessary, but overlapping may be employed. The steel base material 48 can be made of steel material such as channel steel. By integrating the steel base material 48 with the steel frame member 16 by welding or the like, the reinforced gypsum board 20B can be fastened to the steel base material 48 using only fastening materials such as screws, improving workability. The underside of the reinforced gypsum board 20B is positioned flush with the bottom end surface of the outermost reinforced gypsum board 20A. The left and right end surfaces of the reinforced gypsum board 20B are joined to the inside surfaces of the outermost reinforced gypsum board 20A. The lower end surface of the innermost reinforced gypsum board 20A is joined to the upper surface of the reinforced gypsum board 20B.

[0028] The number of sheets and total thickness of the reinforced gypsum boards 20A, 20B used can be set appropriately depending on the required fire resistance. For example, it is desirable to set the total thickness of the reinforced gypsum boards to the following thickness depending on the required fire resistance time. In this way, the progression of combustion into the inner wooden base material 18 can be effectively suppressed.

[0029] - When the required fire resistance time is 1 hour: 20 to 24 mm - When the required fire resistance time is 1.5 hours: 22 to 26 mm - When the required fire resistance time is 2 hours: 25 to 30 mm - When the required fire resistance time is 3 hours: 32 to 38 mm

[0030] The non-wood fire-resistant covering material 20 is not limited to reinforced gypsum board, and may be made of other fire-resistant covering materials. The non-wood fire-resistant covering material 20 can be omitted depending on the fire resistance of the outer wood fire-resistant covering material 22 and the required fire resistance, but it is desirable to arrange it as in the first embodiment in order to improve the fire resistance of the entire component.

[0031] The wood fire-resistant covering material 22 is composed of a side-side wood fire-resistant covering material 22A and a bottom-side wood fire-resistant covering material 22B, which are provided so as to continuously cover the outside of the reinforced gypsum boards 20A, 20B (non-wood fire-resistant covering material 20). Both wood fire-resistant covering materials 22A, 22B have a substantially rectangular cross section. The side-side wood fire-resistant covering material 22A is attached to the side-side reinforced gypsum board 20A, and its upper end surface is joined to the underside of the floor material 24. Meanwhile, the bottom-side wood fire-resistant covering material 22B is attached to the bottom-side reinforced gypsum board 20B, and the lower end surfaces of the side-side wood fire-resistant covering material 22A are joined to the left and right upper surfaces of the bottom-side wood fire-resistant covering material 22B.

[0032] The wood fire-resistant covering material 22 has a density of 0.45 g / cm 3It is desirable to ensure fire-stopping performance by using wood materials of at least this level. Examples of such wood materials include larch laminated lumber. The thickness of the wood fire-resistant covering material 22 is preferably set to a thickness that will complete carbonization when heated for the required fire-resistance time. For example, the thickness can be set as follows depending on the required fire-resistance time:

[0033] - When the required fire resistance time is 1 hour: Thickness is approximately 35 to 42.5 mm - When the required fire resistance time is 1.5 hours: Thickness is approximately 52.5 to 64 mm - When the required fire resistance time is 2 hours: Thickness is about 70 to 85 mm - For a required fire resistance time of 3 hours: thickness of approximately 105 to 127.5 mm

[0034] Next, an example of a method for installing the fire-resistant wood-covered steel frame member 100 will be described. First, the steel base material 48 is welded to the underside of the bottom flange 14 of the steel frame member 16. Next, the wooden base material 18 is attached to the recessed space 26 between the web 10 and the upper and lower flanges 12, 14. Note that in order to absorb dimensional errors in the steel frame member 16, the design should take into account gaps between the wooden base material 18 and the upper and lower flanges 12, 14. Similarly, the wooden base material 18 should be designed to protrude beyond the left and right ends of the upper and lower flanges 12, 14.

[0035] Next, the reinforced gypsum boards 20A, 20B are fastened to the sides of the wooden base material 18 and the underside of the steel base material 48 with fasteners such as screws. When overlapping the boards, the joints 46 between the boards must not overlap. Finally, the wood fire-resistant covering material 22 is fastened to the sides and underside of the reinforced gypsum boards 20A, 20B. In this manner, the wood fire-resistant covering steel frame member 100 can be easily installed.

[0036] According to the first embodiment, the amount of wood used can be increased efficiently by filling the spaces between the upper and lower flanges 12, 14 of the steel beam with wooden base material 18 and using it as a base for fastening fire-resistant covering materials 20, 22. This increases the amount of carbon dioxide fixed in buildings to which the first embodiment is applied, contributing to reducing the environmental load.

[0037] If combustion progresses to the inside of the wooden base material 18 filled between the upper and lower flanges 12, 14, depending on the fire conditions, this could cause the temperature of the steel beams to rise, potentially leading to the collapse of the frame. In contrast, in the present embodiment 1, by overlapping the reinforced gypsum boards 20A on the sides of the beams and offsetting the joints 46 of each board, it is possible to prevent combustion from progressing to the inside of the wooden base material 18 filled between the upper and lower flanges 12, 14, thereby ensuring fire resistance regardless of the fire conditions. This can contribute to improving the fire safety of buildings to which the present embodiment 1 is applied.

[0038] As a wood fire-resistant coating material 22, it has excellent fire-stopping properties and a density of 0.45 g / cm 3 By using wood materials with a thickness of at least 1000 mm and setting the thickness of the wood fire-resistant covering material 22 to a thickness that will complete carbonization by heating for the required fire-resistant time, the wood will not continue to burn itself after heating for a fire has ended. This contributes to improving the resilience of buildings to which this embodiment 1 is applied.

[0039] By having the wooden base material 18 that protrudes beyond the steel beams, it becomes possible to install fire-resistant covering material that is not affected by distortion of the steel members 16, which contributes to shortening the construction period and reducing construction costs.

[0040] (Embodiment 2) Next, a second embodiment of the present invention will be described. As shown in Figure 2, the fire-resistant wood-clad steel frame component 200 according to the second embodiment is the same as the first embodiment except that a wood decorative material 50 is attached to the outside of the fire-resistant wood cladding material 22. This configuration also provides the same effects as the first embodiment.

[0041] The wood decorative material 50 can be made of wood materials that take design into consideration. By placing the wood decorative material 50 on the outside of the wood fire-resistant covering material 22, a more aesthetically pleasing structure can be achieved, imparting the desired design to the steel beam. When attaching the wood decorative material 50, the thickness of the wood fire-resistant covering material 22 can be reduced by the thickness of the wood decorative material 50. The thickness of the wood decorative material 50 is preferably set to approximately 15 to 30 mm. The wood decorative material 50 can be attached to the wood fire-resistant covering material 22 with adhesive or fasteners such as screws. Alternatively, both methods can be used in combination. The wood decorative material 50 can also be made of fire-resistant materials (combustible materials, semi-noncombustible materials, noncombustible materials). This allows the structure to be applied in areas subject to interior restrictions under the Building Standards Act, thereby broadening its applicability.

[0042] (Embodiment 3) Next, a third embodiment of the present invention will be described. As shown in Fig. 3, a fire-resistant wood-coated steel frame component 300 according to the third embodiment is applied to a steel column and has a similar configuration to that of the second embodiment. Specifically, the fire-resistant wood-coated steel frame component 300 includes a steel frame component 16 made of an H-shaped steel having a web 10 and flanges 12, 14, a wood base material 18, a non-fire-resistant wood coating material 20 (fire-resistant coating material), a fire-resistant wood coating material 22 (fire-resistant coating material), and a wood decorative material 50.

[0043] The wood base material 18 is attached to the web 10 via bolts 32 that pass through through holes 28 provided in the center of the web 10. Steel base materials 48 are attached to the outside of each flange 12, 14. The non-wood fire-resistant covering material 20 is reinforced gypsum board 20A, 20B, and the reinforced gypsum board 20B is attached to the outside of the flanges 12, 14 via the steel base materials 48. The reinforced gypsum board 20A is attached to the outside of the wood base material 18. The wood fire-resistant covering material 22 is attached to the outside of the reinforced gypsum boards 20A, 20B. The wood decorative material 50 is attached to the outside of the wood fire-resistant covering material 22.

[0044] According to this configuration, it is possible to achieve the same effects as those of the second embodiment.

[0045] (Verification of the effects of the present invention) Next, a fire resistance test conducted to verify the effects of the present invention and the results thereof will be described.

[0046] As an example of the present invention, a test specimen simulating the above-mentioned fire-resistant wood-coated steel frame member 200 was prepared and subjected to a fire resistance test to confirm two-hour fire resistance. The fire resistance test was performed by placing the test specimen in a furnace and heating it for two hours in accordance with the standard heating curve specified in ISO 834. Two hours after the start of heating, the burner was extinguished, and the test specimen was left to cool for 22 hours while remaining in the furnace. The standard heating curve specified in ISO 834 is defined by the following equation (1).

[0047] T=345×log 10 (8t+1)+20 Equation (1) where T is furnace temperature [℃], t is heating time [min]

[0048] The specimen was a steel beam. H-350 x 150 x 12 x 19 (SM490A) was used for the steel member 16 of the specimen, and larch laminated timber was used for the wooden base material 18. C-50 x 25 x 0.5 was used for the steel base material 48. Furthermore, for the non-wood fire-resistant covering material 20, two sheets of reinforced gypsum board (15 mm thick) were used on the sides and bottom, for the wooden fire-resistant covering material 22, larch laminated timber (55 mm thick) was used, and for the wooden decorative material 50, cedar laminated timber (15 mm thick) was used. Furthermore, ALC panels (100 mm thick) were used for the floor material 24.

[0049] During the test, a load was applied from the testing equipment so that a long-term allowable bending moment would be generated at the center between the supports of the test specimen, and the steel temperature of the steel member 16 and the vertical displacement (deflection) of the test specimen were measured. Figure 4 (1) shows the cross-sectional shape of the test specimen, and (2) shows a side view of the test equipment, as well as the heating temperature measurement positions (T1 to T5) and displacement measurement positions (DG1 to DG6). Figure 5 shows the time changes in steel temperature and deflection of the test specimen obtained from the measurement results.

[0050] As a result of the test, the steel temperature of the test specimen was kept below 200°C, the deflection was significantly below the specified value of 186 mm, and it was confirmed that the wood had stopped burning, confirming that the structure of this example has a 2-hour fire resistance performance.

[0051] As described above, the fire-resistant wood-coated steel frame component of the present invention comprises a steel frame component made of H-shaped steel having a web and a flange, a wood base material that is arranged to fill the recessed space formed by the web and the flange, and a fire-resistant coating material that is arranged to continuously cover the outside of the wood base material from the end to the outside of the flange, thereby effectively suppressing the progression of combustion into the wood base material between the flanges.

[0052] In addition, according to another fire-resistant wood-based steel frame component of the present invention, the wood base material is arranged to extend outward beyond the end of the flange, so that the fire-resistant coating material can be easily fastened and installed to the wood base material without being affected by distortion of the steel frame component.

[0053] Furthermore, according to another fire-resistant wood-coated steel frame component of the present invention, a wood decorative material is provided on the outside of the fire-resistant coating material, so that a desired design can be imparted.

[0054] In addition, according to another wood-based fire-resistant coated steel member of the present invention, the fire-resistant coating material is a laminated arrangement of non-wood-based fire-resistant coating material and wood-based fire-resistant coating members, thereby improving fire resistance performance.

[0055] In addition, according to another fire-resistant wood-based coated steel frame component of the present invention, the non-fire-resistant wood-based coating material is composed of multiple reinforced gypsum boards stacked in the thickness direction, and the joints formed in each of the multiple reinforced gypsum boards that are adjacent in the thickness direction are offset in the width direction of the reinforced gypsum boards so that they do not overlap in the thickness direction, thereby suppressing heat input to the wood base material through the joints.

[0056] Furthermore, according to the method for installing fire-resistant wood-based coated steel frame components of the present invention, the method for installing the fire-resistant wood-based coated steel frame components described above involves fastening the wood base material to the recess space, and then fastening the fire-resistant coating material to the outside of the wood base material and to the ends and outside of the flange, thereby making it easy to install the fire-resistant wood-based coated steel frame components.

[0057] The Sustainable Development Goals (SDGs) are 17 international goals adopted at the United Nations Summit in September 2015. The fire-resistant wood-coated steel member and its installation method according to this embodiment can contribute to achieving one of the 17 SDGs, for example, goal 12, "Responsible Consumption and Production." [Industrial Applicability]

[0058] As described above, the fire-resistant wood-coated steel frame member and its installation method of the present invention are useful for structural members such as columns and beams of buildings, and are particularly suitable for preventing combustion from progressing into the wood between flanges. [Explanation of symbols]

[0059] 10. Web 12 Upper flange 14 Lower flange 16 Steel members 18 Wood base material 20 Non-wood fire-resistant cladding (fire-resistant cladding) 20A, 20B Reinforced gypsum board 22,22A,22B Wooden fireproof covering material (fireproof covering material) 24 Flooring 26 Recessed space 28,30 Through holes 32 volts 44 Nut 46 Joint 48 Steel base material 50 Wood veneer 100, 200, 300 Fire-resistant wood-coated steel members

Claims

1. A fire-resistant wood-coated steel frame component comprising: a steel frame component made of H-shaped steel having a web and a flange; a wooden base material that is arranged to fill the recessed space formed by the web and the flange; and a fire-resistant coating material that is arranged to continuously cover the outside of the wooden base material from the outside to the end and outside of the flange.

2. 2. The fire-resistant wood-coated steel frame component according to claim 1, wherein the wood base material is arranged so as to protrude outward beyond the end of the flange.

3. 2. The fire-resistant wood-coated steel frame member according to claim 1, wherein a wood decorative material is provided on the outside of the fire-resistant coating material.

4. 2. The fire-resistant wood-based steel frame member according to claim 1, wherein the fire-resistant coating material is a laminate of a non-wood fire-resistant coating material and a wood fire-resistant coating member.

5. The non-wood fire-resistant coating material is composed of a plurality of reinforced gypsum boards stacked in the thickness direction, and the joints formed in each of the plurality of reinforced gypsum boards that are adjacent in the thickness direction are shifted in the width direction of the reinforced gypsum boards so that they do not overlap in the thickness direction. A fire-resistant wood-coated steel frame member as described in claim 4, characterized in that

6. A method for installing the fire-resistant wood-coated steel frame member according to any one of claims 1 to 5, A method for installing wood-based fire-resistant coated steel frame components, characterized in that after fastening the wood base material to the recess space, the fire-resistant coating material is fastened to the outside of the wood base material and to the ends and outside of the flange.

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