Fire-resistant coating structure for steel pipe column and construction method for fire-resistant coating steel pipe column

Abstract

To provide a fire-resistant coating structure for a steel pipe column that can improve workability.SOLUTION: A fire-resistant coating structure (1) for a steel pipe column includes: a steel pipe column (2) having a plurality of outer peripheral holes (2h) formed on its outer periphery; a fire-resistant base member (11), which is a member integrating a base batten (6) and a fire-resistant board (3) via a connecting plate (5), and has through holes (11h) formed at positions corresponding to the outer peripheral holes; fixing members (71), which are inserted into the through holes and the outer peripheral holes, and fix the fire-resistant base member to the steel pipe column; and a decorative material (4), which covers the surface of the fire-resistant base member and is fixed to the base batten of the fire-resistant base member.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a fire-resistant coating structure for a steel pipe column and a method for installing a fire-resistant coated steel pipe column. [Background technology]

[0002] As disclosed in JP 2021-11743 A (Patent Document 1), there is a technique for improving the fire resistance of a steel pipe column by providing a fire-resistant coating material or a non-combustible thin plate between the steel pipe column and a finishing material (for example, wood). In Patent Document 1, an air layer is provided between the steel pipe column and the non-combustible thin plate to prevent the heat of a fire from being transmitted to the column. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-11743 Summary of the Invention [Problem to be solved by the invention]

[0004] In the technology of Patent Document 1, in order to provide an air gap, lip channel steel support members are erected at the four corners of a square steel pipe column, separated from the column, and non-combustible thin plates are attached to the outer surface of the support members. This type of fireproof covering structure has the problem that it is time-consuming to install. There is also a concern that the entire column will become larger.

[0005] The present invention has been made to solve the above-mentioned problems, and its object is to provide a fire-resistant coating structure for a steel pipe column that can improve workability, and a method for installing a fire-resistant coated steel pipe column. [Means for solving the problem]

[0006] A fire-resistant coating structure for a steel pipe column according to one aspect of the present invention comprises a steel pipe column having a plurality of outer peripheral holes provided on its outer periphery, a fire-resistant base member which is a member integrating a base rail and a fire-resistant board via a connecting plate and has a through hole provided at a position corresponding to the outer peripheral hole, a fixing member which is inserted into the through hole and the outer peripheral hole for fixing the fire-resistant base member to the steel pipe column, and a decorative material which covers the surface of the fire-resistant base member and is fixed to the base rail of the fire-resistant base member.

[0007] Preferably, the base rail is a channel-shaped or square-shaped steel material, and the internal space of the base rail is filled with a heat insulating material.

[0008] Preferably, the through hole is provided at a position overlapping the connecting plate or the base rail.

[0009] In one embodiment, the battens extend longitudinally, preferably adjacent the sides of the fire resistant board.

[0010] In one embodiment, the battens extend laterally, and in this case, the battens are preferably adjacent to the upper or lower ends of the fireproof boards divided into a plurality of pieces.

[0011] A method for installing a fire-resistant coated steel pipe column according to another aspect of the present invention includes the steps of preparing a steel pipe column having a plurality of outer peripheral holes pre-formed on its outer periphery, a fire-resistant base member which is a member integrating a base rail and a fire-resistant board via a connecting plate and has through holes formed at positions corresponding to the outer peripheral holes, and a decorative material for covering the surface of the fire-resistant base member, erecting the steel pipe column, inserting fixing members into the through holes and outer peripheral holes to fix the fire-resistant base member to the steel pipe column, and fixing the decorative material to the base rail of the fixed fire-resistant base member. Effect of the Invention

[0012] According to the present invention, workability can be improved. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a diagram showing the appearance of a fire-resistant coated steel pipe column according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II in FIG. [Diagram 3] FIG. 2 is a diagram showing a schematic diagram of two types of fireproof base members used in a fireproof coated steel pipe column according to an embodiment of the present invention. [Figure 4] 3A to 3C are diagrams illustrating a manufacturing process of the first fireproof base member in the embodiment of the present invention. [Diagram 5] 5A to 5C are diagrams illustrating a manufacturing process of the second fireproof base member in the embodiment of the present invention. [Figure 6] A cross-sectional view showing the state in which first and second fire-resistant base members are fixed to a steel pipe column. [Figure 7] FIG. 2 is a cross-sectional view showing a state in which a fireproof base member in a first modified example of an embodiment of the present invention is fixed to a steel pipe pole. [Figure 8] 5A to 5C are diagrams illustrating a manufacturing process of a fireproof base member according to the first modified example of the embodiment of the present invention. [Figure 9] 10A to 10C are diagrams illustrating a manufacturing process of a fireproof base member according to a second modified example of the embodiment of the present invention. [Figure 10] 13A to 13C are diagrams illustrating schematic examples of shapes of connecting plates included in a fireproof base member in a third modified example of the embodiment of the present invention. [Figure 11] 13A to 13C are diagrams illustrating examples of shapes of connecting plates included in a fireproof base member in a fourth modified example of the embodiment of the present invention. [Figure 12] FIG. 1 is a cross-sectional view showing a schematic configuration example of a round fire-resistant coated steel pipe column. [Figure 13] FIG. 1 is a diagram showing a fire-resistant coated steel pipe column based on a known fire-resistant coating structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are designated by the same reference characters and their description will not be repeated.

[0015] (Outline of fire-resistant coating structure for steel pipe columns) FIG. 1 is a diagram showing the appearance of a fire-resistant coated steel pipe pole 1. The fire-resistant coated steel pipe pole 1 includes a steel pipe pole 2 therein, and is equipped with a "fire-resistant coated structure for a steel pipe pole" according to this embodiment. An arrow A1 in FIG. 1 indicates the up-down direction. FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1.

[0016] As shown in FIG. 2, the fireproof coated steel pipe column 1 mainly comprises a steel pipe column 2, a fireproof board 3, and a decorative material 4. The steel pipe column 2 is a square steel pipe. The fireproof board 3 is, for example, a wire-reinforced gypsum board, and is arranged so as to cover the outer peripheral surface of the steel pipe column 2. The decorative material 4 is typically a wooden finishing material, and is arranged so as to cover the outer peripheral surface of the fireproof board 3. The decorative material 4 is made of cedar material (such as laminated timber) with a board thickness of 45 mm or more, and desirably also serves as a fireproof coating material.

[0017] 13(A) and (B) show a fire-resistant coated steel pipe pole 100 based on a known fire-resistant coating structure. The known fire-resistant coated steel pipe pole 100 includes stud bolts 111 and nuts 112 welded to the steel pipe pole 102 as fixing members for fixing coating materials (fireproof board 103 and decorative material 104) to the steel pipe pole 102. When constructing the fire-resistant coated steel pipe pole 100, the stud bolts 111 are welded to each face of the steel pipe pole 2 on-site, and then the coating materials, which have been pre-drilled, are passed through the stud bolts 111 and fastened with nuts 112.

[0018] In such a known construction method, the position of the stud bolt 111 welded on-site must match the hole position of the covering material, so high precision is required. The larger the decorative material 4, the more difficult it is to align it with the stud bolt 111.

[0019] Therefore, the fireproof coated steel pipe pole 1 according to the present embodiment is configured as follows so that the composite material can be attached to the steel pipe pole 2 without welding the stud bolts 111 to the outer periphery of the steel pipe pole 2. That is, the fireproof coated steel pipe pole 1 includes a steel pipe pole 2 having a plurality of holes (hereinafter referred to as "outer periphery holes") 2h on the outer periphery, a fireproof base member 11 in which a base rail 6 and a fireproof board 3 are integrated via a connecting plate 5, a fixing member 71 for fixing the fireproof base member 11 to the steel pipe pole 2, and a decorative material 4 that covers the surface of the fireproof base member 11 and is fixed to the base rail 6. The fireproof base member 11 has a through hole 11h at a position corresponding to the outer periphery hole 2h, and the fixing member 71 is inserted through the through hole 11h of the fireproof base member 11 and the outer periphery hole 2h of the steel pipe pole 2.

[0020] Since the fireproof coated steel pipe pole 1 includes the fireproof base member 11 in which the fireproof board 3 and the base batten 6 are integrated, the fireproof board 3 can be attached and fixed to the steel pipe pole 2 with the fixing member 71 during construction on site. The fixing member 71 is typically a bolt, and the outer peripheral hole 2h of the steel pipe pole 2 is a screw hole that screws onto the bolt shaft. In addition, since the fireproof base member 11 has the base batten 6 for fixing the decorative material 4, the decorative material 4 can be attached in a state independent of the steel pipe pole 2.

[0021] The fireproof base member 11 is manufactured in advance in a factory or the like. In addition, the outer peripheral hole 2h of the steel pipe column 2 is also made in advance in a factory or the like. Therefore, it is possible to improve the alignment accuracy of the outer peripheral hole 2h and the through hole 11h.

[0022] (Example of fireproof base material configuration) With reference to Fig. 4, a configuration example of the fireproof base member (first fireproof base member) 11 in this embodiment will be described. Figs. 4(A) and (B) are diagrams that show a schematic diagram of a manufacturing process of the fireproof base member 11. Fig. 4(A) is a front view (front view seen from the outside) showing the fireproof base member 11 in the middle of manufacturing, and Fig. 4(B) is a front view showing the completed fireproof base member 11. Note that cross sections in each state are shown at the top of the paper of each front view. Arrow A2 in Fig. 4 indicates the width direction (left-right direction) of the fireproof base member 11, and arrow A3 indicates the surface side (outside) of the fireproof base member 11.

[0023] As shown in Fig. 4(A), the connecting plate 5 of the fireproof base member 11 includes a pair of left and right vertical plates 51, 51 and a pair of upper and lower horizontal plates 52, 52, which are connected to form a rectangular frame (see connecting plate 5A in Fig. 5(A)). The connecting plate 5 further includes a horizontal plate 53 disposed in the center in the up-down direction, and is formed into the shape of the number 8 in a plan view. The connecting plate 5 is formed, for example, by processing a thin steel plate.

[0024] A pair of base bars 6, 6 extending in the vertical direction are fixed so as to overlap the surfaces of the vertical plates 51, 51 of the connecting plate 5. The base bars 6 are preferably channel steel members with lips. The base bars 6 are fixed by welding or the like with their openings covered by the connecting plate 5 (vertical plates 51). In other words, the lip portions 61 (FIG. 3) of the base bars 6 are joined to the vertical plates 51. The vertical length of the base bars 6 is approximately equal to the vertical dimension of the connecting plate 5. The horizontal width of the base bars 6 is also typically approximately equal to the horizontal width of the vertical plates 51.

[0025] The vertical dimension of the connecting plate 5 is, for example, 900 to 2000 mm, and is, for example, about 1000 mm. The plate thickness dimension of the connecting plate 5 is, for example, 1 mm or more and 3 mm or less, and is, for example, about 2 mm. The width and depth of the base rail 6 are, for example, about 60 mm and 30 mm, respectively, and the width of the lip portion 61 of the base rail 6 is, for example, about 10 mm. The plate thickness dimension of the base rail 6 may be smaller than the plate thickness dimension of the connecting plate 5, and is, for example, 1 mm or more and 2 mm or less. The vertical dimension of the decorative material 4 does not have to be the same as the vertical dimension of the connecting plate 5. The vertical dimension of the decorative material 4 may be larger than the vertical dimension of the connecting plate 5.

[0026] As shown in FIG. 4(B), the fireproof board 3 is fitted between a pair of left and right base bars 6, 6, so that the base bars 6 are adjacent (surface contact) to the side of the fireproof board 3. The fireproof board 3 is fixed (temporarily fixed) to the surfaces of the horizontal plates 52, 53 of the connecting plate 5 by adhesive or the like. The entire surface of the fireproof board 3 is exposed. The back surface of the fireproof board 3 has a portion that overlaps the connecting plate 5 and a portion that does not overlap the connecting plate 5 and is exposed. The thickness of the fireproof board 3 is approximately equal to the depth dimension of the base bar 6 (e.g., 30 mm), and it is desirable that the surface of the fireproof board 3 and the surface of the base bar 6 are approximately flush with each other. The fireproof board 3 may be made of multiple (e.g., two) reinforced gypsum boards (may be stacked in the thickness direction).

[0027] In this manner, a fireproof base member 11 is completed in which the pair of base rails 6, 6 and the fireproof board 3 are integrated via the connecting plate 5. Through holes 11h are drilled through the completed fireproof base member 11 in the plate thickness direction. The through holes 11h are provided at positions overlapping the connecting plate 5. In this embodiment, the through holes 11h are bolt holes that pass through the fireproof board 3 and the horizontal plates 52, 53 of the connecting plate 5. Each of the horizontal plates 52, 53 is provided with a plurality of through holes 11h spaced apart from each other in the left-right direction.

[0028] As shown in the cross-sectional views of Figures 4(A) and (B), it is preferable that the internal space of the base rail 6 is filled with a heat insulating material (fireproof material) 8 such as rock wool. This can improve the fire resistance of the portion without the fireproof board 3. In other words, the entire fireproof base member 11 can be made into a member having fire resistance.

[0029] 3, the width dimension of the fireproof foundation member 11 is larger than the outer diameter dimension (width dimension of the mounting surface 20a) of the steel pipe column 2, and a part of the base batten 6 protrudes laterally beyond the mounting surface 20a of the steel pipe column 2. In this case, the fireproof foundation member 11A covering the mounting surface 20b adjacent (perpendicular) to the mounting surface 20a may not have the base batten 6. The fireproof foundation member 11 and the fireproof foundation member 11A are also referred to as the first fireproof foundation member 11 and the second fireproof foundation member 11A, respectively.

[0030] A configuration example of the second fireproof base member 11A will be described with reference to Fig. 5. Figs. 5(A) and (B) are diagrams that diagrammatically show the manufacturing process of the second fireproof base member 11A. Fig. 5(A) is a front view (front view seen from the outside) showing the second fireproof base member 11A in the middle of manufacturing, and Fig. 5(B) is a front view showing the completed second fireproof base member 11A. Note that cross sections in each state are shown at the top of the page of each front view.

[0031] The second fireproof base member 11A is composed of a connecting plate 5A narrower in width than the connecting plate 5 and a fireproof board 3 having approximately the same width as the connecting plate 5A. The second fireproof base member 11A is also provided with a through hole 11h penetrating in the plate thickness direction.

[0032] By preparing two each of the first fireproof foundation member 11 having the base rail 6 and the second fireproof foundation member 11A not having the base rail 6, the fireproof coated steel pipe column 1 can be easily constructed on-site. Since the first fireproof foundation member 11 requires the base rail 6, the connecting plate 5 in the first fireproof foundation member 11 does not need to have the vertical plate 51 overlapping the base rail 6. In other words, the base rail 6 may be directly connected to both ends of the horizontal plates 52, 53.

[0033] (Fire-resistant coated steel pipe column installation method) The construction procedure for the fire-resistant coated steel pipe column 1 at the site will be described.

[0034] First, a steel pipe pole 2 having a plurality of outer peripheral holes 2h formed in advance on the outer periphery, two first fireproof foundation members 11 and two second fireproof foundation members 11A, and a decorative material 4 are prepared (preparation process). Then, the steel pipe pole 2 is erected (erecting process).

[0035] When the steel pipe column 2 is installed, the first fireproof foundation member 11 and the second fireproof foundation member 11A are fixed to the steel pipe column 2 one by one with the fixing member 71 (first fixing process). The first fireproof foundation member 11 is fixed to the two opposing surfaces 20a of the steel pipe column 2, and the second fireproof foundation member 11A is fixed to the other two opposing surfaces 20b. At this time, the fixing member 71 is inserted from the outside into the through holes 11h of each fireproof foundation member 11, 11A, and turned into the outer peripheral hole 2h until the connecting plate 5 contacts each mounting surface 20a, 20b of the steel pipe column 2. As a result, the fireproof board 3 is fixed to the steel pipe column 2. That is, as shown in FIG. 6, the outer peripheral surfaces (mounting surfaces 20a, 20b) of the steel pipe column 2 are covered with the fireproof board 3.

[0036] When the first fixing step is completed, the second fireproof foundation member 11A is sandwiched between the left and right ends of the two first fireproof foundation members 11, 11, as shown in Fig. 6. Specifically, both left and right end faces 11s (Fig. 3) of the second fireproof foundation member 11A are in surface contact (or close to) the back surface of the vertical plate 51 of the first fireproof foundation member 11. The foundation bars 6 arranged at the four corners of the steel pipe column 2 have a surface portion 62 opposite to the lip portion 61 and one side portion 63 exposed to the outside (see Fig. 6).

[0037] Next, the decorative material 4 is fixed to the base batten 6 of the first fireproof base member 11 with a screw 72 (second fixing step). The screw 72 is a type of fastening member for fixing the decorative material 4 to the base batten 6. The decorative material 4 covering the first fireproof base member 11 is fixed to the surface portion 62 of the base batten 6, and the decorative material 4 covering the second fireproof base member 11A is fixed to the side portion 63 of the base batten 6. This completes the fireproof coated steel pipe column 1 shown in FIG. 2. The back surface of the decorative material 4 is provided with a recess (seat hole) 40 for accommodating the head (bolt head) 71a of the fixing member 71. This allows the front surface of the fireproof board 3 and the back surface of the decorative material 4 to be in close contact with each other without any gaps. There may be some gaps (air layers) between the fireproof board 3 and the decorative material 4.

[0038] As described above, according to this embodiment, since it is not necessary to weld the stud bolt 111 (FIG. 13) to the steel pipe column 2 on-site, the construction work on-site can be simplified. In addition, since it is not necessary to use welding equipment on-site, the risk of fire can be eliminated. In addition, since the outer peripheral hole 2h and the through hole 11h through which the fixing member 71 is inserted are drilled in advance at a factory or the like, the fireproof foundation member 11, 11A can be fixed in a state where it is appropriately positioned relative to the steel pipe column 2. Note that the through hole 11h of the fireproof foundation member 11, 11A may be a loose hole.

[0039] In addition, since the base rail 6 for fixing the decorative material 4 is integrated into the first fire-resistant base member 11, even a large decorative material 4 having a height of, for example, 2000 mm or more can be easily fixed with the screws 72. In other words, the positioning precision (hole alignment) required for the known fire-resistant coated steel pipe column 100 can be reduced.

[0040] In addition, in this embodiment, since the fireproof board 3 and the base batten 6 are provided in the same layer, there is no unnecessary layer, and it is possible to reduce the outer dimensions of the fireproof-coated steel pipe column 1. Note that, by adjusting the plate thickness of the connecting plate 5, it is also possible to provide an air layer of a desired thickness between the surface of the steel pipe column 2 and the fireproof board 3.

[0041] (Variation 1) In the above embodiment, an example is shown in which two types of parts (a first fireproof base member 11 having a base rail 6 and a second fireproof base member 11A having no base rail 6) are used with the fireproof board 3 integrated therein, but the present invention is not limited to such an example. As shown in Fig. 7, the part with the fireproof board 3 integrated therein may be one type (a fireproof base member 12).

[0042] Figures 8(A) and (B) are diagrams that show a schematic diagram of a manufacturing process of the fireproof base member 12. Figure 8(A) is a front view (front view seen from the outside) showing the fireproof base member 12 in the middle of manufacturing, and Figure 8(B) is a front view showing the completed fireproof base member 12. Note that in Figure 8 as well, cross sections in each state are shown at the top of the paper surface of each front view.

[0043] As shown in Fig. 8(A), the fireproof base member 12 includes the above-mentioned connecting plate 5 and one base rail 6 fixed so as to overlap the surface of one vertical plate 51 of the connecting plate 5. As shown in Fig. 8(B), the fireproof board 3 is fixed (temporarily fixed) to the horizontal plates 52 and 53 of the connecting plate 5 and the surface of the other vertical plate 51 in a state adjacent to the base rail 6. In this way, the fireproof base member 12 is completed in which the one base rail 6 and the fireproof board 3 are integrated via the connecting plate 5. A through hole 11h penetrating the completed fireproof base member 12 in the plate thickness direction is drilled.

[0044] (Variation 2) In the above embodiment, an example has been shown in which the base rails 6 for fixing the decorative material 4 are arranged vertically along the vertical plates 51 of the connecting plate 5, but as shown in FIG. 9, the base rails 6 may also be arranged horizontally.

[0045] 9(A) and (B) are diagrams showing a schematic diagram of the manufacturing process of the fireproof base member 13. Fig. 9(A) is a front view (front view seen from the outside) showing the fireproof base member 13 in the middle of manufacturing, and Fig. 9(B) is a front view showing the completed fireproof base member 13. In Fig. 9, vertical cross sections of each state are shown on the right side of each front view.

[0046] The base rail 6 is bridged between a pair of vertical plates 51, 51 of the connecting plate 5 and extends in the width direction of the connecting plate 5. It is desirable that a plurality of base rails 6 (for example, two) are provided at intervals between the upper and lower horizontal plates 52, 52. In this modified example, the fireproof board 3 is divided in the vertical direction at the position of the base rail 6. The base rail 6 is adjacent to (in surface contact with) the upper end or lower end of the fireproof board 3.

[0047] In this modification, the through hole 11h penetrating the fireproof base member 13 may be provided at a position overlapping the base rail 6. In this case, the through hole 11h does not penetrate the fireproof board 3, so that damage to the fireproof board 3 can be prevented. Note that, in this modification as well, the through hole 11h may be provided penetrating the fireproof board 3 and the horizontal plate 52.

[0048] (Variation 3) In the above embodiment, an example was shown in which the entire connecting plate 5 is flat, but the upper and lower ends of the connecting plate 5 (the horizontal plates 52 described above) may be formed into an angle shape. Fig. 10(A) is a front view (front view seen from the outside) showing a connecting plate 5B in this modified example. Fig. 10(B) is a vertical cross-sectional view of the connecting plate 5B in this modified example, showing a cross-section along line XB-XB in Fig. 10(A). Note that Fig. 10 shows a vertically arranged base rail 6.

[0049] The connecting plate 5B has L-shaped horizontal plates 54 at the upper and lower ends. In this case, the upper and lower end faces of the fireproof board 3 (see FIG. 4(B) and the like) that is fitted between the pair of left and right foundation rails 6, 6 are covered with the folded parts (horizontal parts) 54a of the horizontal plates 54. Therefore, the rigidity of the fireproof foundation member using the connecting plates 5B can be ensured.

[0050] (Variation 4) In the above-mentioned modified example 2 in which the base rails 6 are arranged horizontally, the left and right ends of the connecting plate 5 (the above-mentioned vertical plates 51) may be formed in an angle shape. Fig. 11(A) is a front view (front view seen from the outside) showing a connecting plate 5C in this modified example. Fig. 11(B) is a vertical cross-sectional view of the connecting plate 5C in this modified example, showing a cross-section along line XIB-XIB in Fig. 11(A). Note that Fig. 11 shows the base rails 6 arranged horizontally.

[0051] The connecting plate 5C has L-shaped vertical plates 55 at the left and right ends. In this case, both left and right end faces of the multiple fireproof boards 3 (see FIG. 9(B) and the like) that are divided into upper and lower parts at the position of the base rail 6 are covered with the folded parts 55a of the vertical plates 55. Therefore, the rigidity of the fireproof base member using the connecting plate 5C can be ensured.

[0052] (Other variations) In the above-mentioned embodiment and each modified example, the base rail 6 is a channel steel with a lip, but it may be a square steel (not shown). Even in this case, it is preferable that the heat insulating material 8 is filled in the internal space of the base rail.

[0053] Although the fireproof coated steel pipe column 1 and the steel pipe column 2 are typically rectangular, the above-mentioned fireproof coating structure can also be applied to, for example, a cylindrical steel pipe column. Fig. 12 is a cross-sectional view showing a schematic configuration example of a round fireproof coated steel pipe column 1A. The round fireproof coated steel pipe column 1A includes a cylindrical steel pipe column 2A, an arc-shaped fireproof base member 14 in which a base batten 6 and an arc-shaped fireproof board 3A are integrated via an arc-shaped connecting plate 5D, a fixing member 71 for fixing the fireproof base member 14 to the steel pipe column 2A, and an arc-shaped decorative material 4A fixed to the base batten 6 of the fireproof base member 14 with a screw 72.

[0054] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0055] 1,1A,100 Fire-resistant coated steel pipe column, 2,2A,102 Steel pipe column, 2h Outer peripheral hole, 3,3A,103 Fire-resistant board, 4,4A,104 Decorative material, 5,5A,5B,5C,5D Connecting plate, 6 Base rail, 8 Insulation material, 11,11A,12,13,14 Fire-resistant base material, 11h Through hole, 51,55 Vertical plate, 52,53,54 Horizontal plate, 71 Fixing material, 72 Screw.

Claims

1. A steel pipe column having a plurality of outer peripheral holes provided on an outer periphery thereof; a fireproof base member which is a member in which a base rail and a fireproof board are integrated via a connecting plate, the fireproof base member having through holes at positions corresponding to the outer peripheral holes; A fixing member for fixing the fireproof base member to the steel pipe column, the fixing member being inserted into the through hole and the outer peripheral hole; A fire-resistant coating structure for a steel pipe column comprising: a decorative material that covers the surface of the fire-resistant base component and is fixed to the base rail of the fire-resistant base component.

2. The base rail is a grooved or rectangular steel material, The fire-resistant coating structure for a steel pipe column according to claim 1 , wherein an internal space of the base rail is filled with a heat insulating material.

3. The fire-resistant coating structure for a steel pipe column according to claim 1 , wherein the through hole is provided at a position overlapping the connecting plate or the base rail.

4. The fire-resistant coating structure for a steel pipe column according to claim 1 , wherein the base ribs extend vertically and are adjacent to the sides of the fire-resistant board.

5. The fire-resistant coating structure for a steel pipe column according to claim 1, wherein the base battens extend laterally and are adjacent to the upper or lower ends of the fire-resistant boards divided into a plurality of pieces.

6. A method for installing a fire-resistant coated steel pipe column, comprising: A process of preparing a steel pipe pole having a plurality of outer peripheral holes formed in advance on the outer periphery, a fireproof base member which is a member in which a base rail and a fireproof board are integrated via a connecting plate and which has through holes formed at positions corresponding to the outer peripheral holes, and a decorative material for covering the surface of the fireproof base member; A step of erecting the steel pipe pole; A step of inserting a fixing member into the through hole and the outer peripheral hole to fix the fireproof base member to the steel pipe column; and a step of fixing the decorative material to the base rail of the fixed fire-resistant base component.

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