handrail

Abstract

To provide a handrail that can be installed with sufficient strength on a structure made of wood material. [Solution] A handrail installed on a wooden frame, comprising a metal post, a bracket, and a lag screw bolt, wherein the lag screw bolt is embedded in the frame in a horizontally extending direction, the bracket is positioned on the front side of the frame and fixed to the lag screw bolt, and the post is positioned on the front side of the frame and fixed to the bracket.

Description

Technical Field

[0006] , ,

[0005] ,

[0007] , ,

[0001] The present invention relates to a handrail installed on a body made of a woody material.

Background Art

[0002] Conventionally, many mid-rise and high-rise buildings are made of reinforced concrete, and metal (such as aluminum) handrails are installed on their verandas and the like.

[0003] By the way, in recent years, new woody materials such as CLT (Cross Laminated Timber) and new connection structures for such materials have been proposed (for example, Patent Document 1), and wooden mid-rise and high-rise buildings using these technologies have also been proposed. And there is a desire to install a metal handrail in a wooden mid-rise and high-rise building as well, just as in the case of a reinforced concrete building.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, conventional metal handrails are assumed to be installed on a concrete body, and there is no precedent for installing them on a wooden body. Therefore, a method for installing the handrail support on a wooden body so as to obtain sufficient strength has not been established.

[0006] The present invention has been made in view of such circumstances, and an object thereof is to provide a handrail that is installed with sufficient strength on a body made of a woody material.

Means for Solving the Problems

[0007] The handrail of the present invention is a handrail installed on a wooden frame, and comprises a metal post, a bracket, and a lag screw bolt, wherein the lag screw bolt is embedded in the frame in a direction extending horizontally, the bracket is positioned on the front side of the frame and fixed to the lag screw bolt, and the post is positioned on the front side of the frame and fixed to the bracket.

[0008] Furthermore, in the present invention, the support column may be arranged at a distance from the front surface of the frame.

[0009] Furthermore, the present invention may also include a plurality of lag screw bolts arranged vertically apart from one of the support columns, and the bracket may be fixed to these plurality of lag screw bolts. [Effects of the Invention]

[0010] According to the present invention, since the lag screw bolts are firmly fixed to the structure made of wood material, the handrail itself is installed with sufficient strength relative to the structure. The lag screw bolts are embedded in the structure in a direction that extends horizontally, and the wind pressure acting on the handrail becomes a load in the tensile and compressive direction (the direction in which the lag screw bolts extend) relative to the lag screw bolts, making it resistant to wind pressure.

[0011] Furthermore, if the support columns are positioned at a distance from the front of the structure, they can prevent damage to the structure by not digging into it when the columns swing back and forth due to wind pressure or other factors.

[0012] Furthermore, if the bracket is fixed to multiple lag screw bolts positioned vertically, it will exhibit higher resistance to loads in the front-to-back (horizontal) direction on the support column. [Brief explanation of the drawing]

[0013] [Figure 1]This is an explanatory diagram of the fixing part, where (a) is a longitudinal section view, (b) is a front view, and (c) is a transverse section view. [Figure 2] This is a vertical cross-sectional view of the upper end of the panel section. [Figure 3] This is a vertical cross-sectional view of the lower end of the panel section. [Figure 4] This is a cross-sectional view of the horizontal end of the panel section (in the case of the middle section in the left-right direction of the handrail). [Figure 5] A cross-sectional view of the horizontal end of the panel (in the case of the right end of the handrail). [Figure 6] This is a vertical cross-sectional view of the louver section and the water drain section. [Figure 7] This is a vertical cross-section of the handrail. [Figure 8] Front view of the handrail. [Modes for carrying out the invention]

[0014] The specific details of the handrail of the present invention will be described below. This handrail can be installed and used in various locations, but here we will show an embodiment in which it is installed on the balcony of an apartment building for the purpose of preventing falls. This apartment building is a medium-to-high-rise wooden building, and CLT is used as the structural material. In the following, the depth direction of the handrail will be the front-to-back direction, where the outdoor side is the front and the indoor side is the rear. Also, the width direction (horizontal direction) of the handrail will be the left-to-right direction.

[0015] As shown in Figures 7 and 8, the handrail 100 is attached to the front of a structure S made of wood material (CLT). The handrail 100 comprises a plurality of support posts 101 arranged at intervals from left to right, a fixing part 1 for fixing each support post 101 to the structure S, a panel part 2 provided on the upper front of the support post 101, a horizontal bar 3 provided between adjacent support posts 101 at the height of the lower end of the panel part 2, a louver part 4 provided on the front of the support post 101 and below the panel part 2, and a water drain part 5 provided on the front of the support post 101 and below the louver part 4.

[0016] The support column 101 is made of an extruded aluminum profile. As shown in FIGS. 4 and 5, the support column 101 has a substantially rectangular cross-section and is a hollow shape extending vertically. Inside the support column 101, a core material 102 extending vertically is inserted. The core material 102 extends from the lower end to the upper part of the support column 101. The support column 101 and the core material 102 are fixed by screwing. Screws (not shown) for this screwing penetrate the support column 101 and are screwed into the core material 102.

[0017] As shown in FIGS. 1, 7 and 8, the fixing part 1 is provided at the lower part of each support column 101. However, in FIG. 1, components other than the fixing part 1, the support column 101 and the housing S are omitted. The fixing part 1 includes a bracket 11, a lag screw bolt 12, a support column side bolt 13, a support column side nut 14, a support column side screw 15, a housing side bolt 16, and a sealing material 17.

[0018] Two brackets 11 are provided for one support column 101 and are arranged on the left and right sides of the support column 101. The bracket 11 is made of stainless steel, has a substantially L-shaped cross-section, and is a profile extending vertically. The bracket 11 has a prospective surface part 111 extending back and forth, and a finding surface part 112 extending from the rear end of the prospective surface part 111 toward the opposite side of the support column 101 side (left side in the bracket 11 on the left side of the support column 101 and right side in the bracket 11 on the right side of the support column 101). Prospective surface bolt holes 113 are formed in the upper and lower parts of the prospective surface part 111. The prospective surface bolt holes 113 are oblong holes long in the front and rear direction. Prospective surface screw holes 114 are formed in the upper and lower parts between the upper and lower prospective surface bolt holes 113 of the prospective surface part 111. The prospective surface screw holes 114 are round holes. Finding surface bolt holes 115 are formed in the upper and lower parts of the finding surface part 112. The finding surface bolt holes 115 are oblong holes long in the left and right direction. The height positions of the upper and lower finding surface bolt holes 115 are the same as the height positions of the upper and lower prospective surface bolt holes 113 respectively. And the prospective surface part 111 abuts against the left and right surfaces of the support column 101. The finding surface part 112 abuts against the front surface of the housing S. Note that a sealing material 17 made of butyl seal is attached to the rear surface of the finding surface part 112, and the sealing material 17 is sandwiched between the finding surface part 112 and the housing S.

[0019] The lug screw bolt 12 has a male thread formed over substantially the entire length around a round bar-shaped shaft. Four lug screw bolts 12 are provided for one support column 101 and are embedded in the housing S. The lug screw bolt 12 is embedded horizontally from the front surface of the housing S, and the front end surface of the lug screw bolt 12 is flush with the front surface of the housing S and exposed toward the front side. The lug screw bolt 12 is disposed at a position corresponding to the upper and lower finding surface bolt holes 115 of the left and right brackets 11. The lug screw bolt 12 has a female screw hole 121 formed in the front end surface.

[0020] The female screw hole 121 of the lug screw bolt 12 communicates with the finding surface bolt holes 115 of the left and right brackets 11 respectively. The housing-side bolt 16 is inserted into the finding surface bolt hole 115 and screwed into the female screw hole 121, whereby the housing S and the bracket 11 are fixed. Since the finding surface bolt hole 115 is a long hole long in the left-right direction, the left-right position of the bracket 11 (support column 101) with respect to the housing S can be adjusted.

[0021] Through holes are formed in the left and right surfaces of the support column 101 at positions corresponding to the prospective surface bolt holes 113 of the bracket 11. The through holes and the left and right prospective surface bolt holes 113 communicate in the left-right direction, and the support column-side bolt 13 is inserted therein. That is, the support column-side bolt 13 penetrates the prospective surface portions 111 of the support column 101 and the left and right brackets 11. Then, a support column-side nut 14 is screwed onto the tip of the support column-side bolt 13, and the support column 101 and the bracket 11 are fixed. Since the prospective surface bolt hole 113 is a long hole long in the front-rear direction, the front-rear position of the support column 101 with respect to the bracket 11 (housing S) can be adjusted. Further, a support column-side screw 15 is inserted into the prospective surface screw hole 114 of the bracket 11 and screwed into the left and right surfaces of the support column 101. The support column-side screw 15 is inserted after the front-rear position of the support column 101 with respect to the bracket 11 is determined. Note that regardless of the front-rear position of the support column 101 with respect to the bracket 11, the support column 101 is disposed spaced apart from the front side from the front surface of the housing S. That is, a gap G is formed between the rear surface of the support column 101 and the front surface of the housing S.

[0022] Panel section 2 comprises a glass panel 21, a coping 22, a lower furring strip 23, and a vertical support member 24.

[0023] The glass panel 21 is a rectangular laminated glass panel, with one glass panel 21 positioned for each adjacent pair of support columns 101. As shown in Figures 2 to 5, an upper frame 211, a lower frame 212, and vertical frames 213 (end vertical frames 214) are attached to the four sides of the glass panel 21. The upper frame 211 has an upper frame body 211a that covers the upper edges of the top and rear surfaces of the glass panel 21, and an upper engaging portion 211b formed on the rear side of the upper frame body 211a. A sealing material 211c is placed between the rear surface of the glass panel 21 and the upper frame body 211a. The upper engaging portion 211b extends from the upper frame body 211a toward the rear, then bends and extends downward. The lower frame 212 has a lower frame body 212a that covers the lower edges of the bottom and rear surfaces of the glass panel 21, and a lower engaging portion 212b formed on the rear side of the lower frame body 212a. A sealing material 212c is placed between the rear surface of the glass panel 21 and the lower frame body 212a. The lower engaging portion 212b extends from the lower frame body 212a toward the rear, then bends and extends downward. The vertical frame 213 has a vertical frame body 213a that covers the left and right edges of the left and right surfaces and the rear surface of the glass panel 21, respectively, and a vertical engaging portion 213b formed on the rear side of the vertical frame body 213a. A sealing material 213c is placed between the rear surface of the glass panel 21 and the vertical frame body 213a. The vertical engaging portion 213b extends from the vertical frame body 213a toward the rear, then bends and extends toward the outer circumference of the glass panel 21. Note that the end vertical frame 214 is attached only to the end side of the glass panel 21 located at the left and right ends of the handrail 100. The end vertical frame 214 has an end vertical frame body 214a facing the rear surface of the glass panel 21, and an end vertical engaging portion 214b formed on the rear side of the end vertical frame body 214a. A sealing material 214c is placed between the rear surface of the glass panel 21 and the end vertical frame body 214a. The end vertical engaging portion 214b extends from the end vertical frame body 214a toward the rear, bends, and extends toward the outer circumference of the glass panel 21.

[0024] As shown in Figure 8, the coping 22 extends to the left and right and is attached to the upper end of the support column 101. As shown in Figure 2, the coping 22 has a coping body 221, a coping batten 222, and an upper receiving groove 223. The coping batten 222 is attached to cover the upper end of the support column 101. The front portion of the coping batten 222 protrudes from the support column 101. The upper receiving groove 223 is provided at the front end of the coping batten 222. The upper receiving groove 223 is a groove-shaped portion with a roughly U-shaped cross-section that opens upward. The coping body 221 is attached so as to cover the coping batten 222 and the upper receiving groove 223 from above. The upper surface of the coping body 221 is inclined downward toward the rear.

[0025] As shown in Figure 8, the lower furring strip 23 extends to the left and right and is attached to the front of the middle section in the vertical direction of the support column 101. As shown in Figure 3, the lower furring strip 23 has a lower furring strip body 231, a lower receiving groove 232, and a panel support part 233. The lower furring strip body 231 has a roughly U-shaped cross-section that opens toward the front, and its rear surface abuts against the front of the support column 101 and is screwed in. The lower receiving groove 232 is provided at the upper front end of the lower furring strip body 231. The lower receiving groove 232 is a groove-shaped part with a roughly U-shaped cross-section that opens toward the upward. The panel support part 233 is provided at the lower front end of the lower furring strip body 231. The panel support part 233 extends toward the front from the lower furring strip body 231, bends, and extends toward the upward. In addition, furring strip brackets 234 that support the lower furring strip 23 are attached to each support column 101. The furring strip bracket 234 is roughly L-shaped when viewed from the left or right direction, is screwed to the front of the support column 101, and abuts against the lower surface of the lower furring strip 23.

[0026] As shown in Figures 7 and 8, the vertical support member 24 extends vertically and is attached to the area from the upper end of the front surface of the support column 101 to directly above the lower furring strip 23. As shown in Figures 4 and 5, the vertical support member 24 is composed of two members: a rear member 241 and a front member 242. The rear member 241 has a roughly T-shaped cross-section and has a rear visible surface portion 243 and a rear inward surface portion 244. The rear visible surface portion 243 abuts against the front surface of the support column 101 and is screwed in place. The rear inward surface portion 244 extends from the left-right center of the rear visible surface portion 243 toward the front. The front member 242 has a front visible surface portion 245, a front inward surface portion 246, and a vertical support groove portion 247. The front visible surface portion 245 is located in front of the rear visible surface portion 244 of the rear member 241. The front visible surface portion 246 extends from the middle of the front visible surface portion 245 in the left-right direction toward the rear and is screwed to the rear visible surface portion 244. The vertical receiving groove portion 247 is provided on the front side of the front visible surface portion 245. The vertical receiving groove portion 247 is a groove-shaped portion with a roughly U-shaped cross-section that opens toward both the left and right sides.

[0027] The fixing structure of the glass panel 21 in the panel section 2 configured in this way will now be described. As shown in Figures 2 to 5, the lower end (lower frame body 212a) of the glass panel 21 is placed on the panel support portion 233 of the lower furring strip 23. The lower engaging portion 212b engages with the lower receiving groove portion 232. The upper engaging portion 211b engages with the upper receiving groove portion 223. The vertical engaging portion 213b engages with the vertical receiving groove portion 247. For glass panels 21 located at the left and right ends of the handrail 100, the end vertical engaging portion 214b engages with the vertical receiving groove portion 247.

[0028] As shown in Figure 3, the horizontal rail 3 comprises a horizontal rail body 31, a horizontal rail shim 32, and a horizontal rail bracket 33. The horizontal rail bracket 33 is approximately L-shaped when viewed from the front-rear direction and is screwed to the left and right sides of the support column 101. The horizontal rail body 31 is a member with a roughly U-shaped cross-section that extends to the left and right and opens downwards. The horizontal rail body 31 is placed between adjacent support columns 101, and its left and right ends are placed on the horizontal rail bracket 33 and screwed in. The horizontal rail body 31 covers the horizontal rail bracket 33 from above. The horizontal rail shim 32 is a flat plate-shaped member that extends to the left and right. The horizontal rail shim 32 is attached to the lower end of the horizontal rail body 31 and closes the opening of the horizontal rail body 31. The height position of the upper surface of the horizontal rail body 31 is the same as the height position of the lower surface of the lower furring strip 23 of the panel section 2, and furthermore, it is the same as the height position of the upper surface of the structural frame S.

[0029] As shown in Figures 7 and 8, the louver section 4 comprises a plurality of louver members 41. The louver members 41 extend to the left and right and are attached below the front panel section 2 of the support column 101. Each louver member 41 is spaced apart vertically. As shown in Figure 6, the louver member 41 has a base member 411 and a tip member 412. The base member 411 has a roughly U-shaped cross-section that opens toward the front, and its rear surface abuts against the front surface of the support column 101 and is screwed in place. The tip member 412 has a rectangular cross-section, and engaging claws are formed at the upper and lower ends of its rear surface. The engaging claws engage with the upper and lower front ends of the base member 411 and are fixed in place. The front end of the louver member 41 protrudes forward from the front end of the panel section 2.

[0030] As shown in Figures 7 and 8, the drain section 5 is equipped with a drain material 51. The drain material 51 extends to the left and right and is attached to the lower end of the front surface of the support column 101 (below the louver section 4). As shown in Figure 6, the drain material 51 has an upright surface portion 511 that extends vertically, an inclined surface portion 512 that extends downward and forward from the lower end of the upright surface portion 511, a front surface portion 513 that extends downward from the front end of the inclined surface portion 512, and a bottom surface portion 514 that extends backward from the lower end of the front surface portion 513. The rear end of the bottom surface portion 514 extends behind the upright surface portion 511. The upright surface portion 511 abuts against the front surface of the support column 101 and is screwed in place. The rear end of the bottom surface portion 514 abuts against the lower end surface of the support column 101 and is screwed in place. The front end (front portion 513) of the water drain material 51 protrudes forward from the front end of the louver portion 4.

[0031] Next, I will explain the installation procedure for this handrail 100. (1) Embedding of lag screw bolt 12 A pilot hole is formed in the frame S. The pilot hole is formed horizontally from the front surface of the frame S. Next, a lag screw bolt 12 is screwed into the pilot hole. The entire length of the lag screw bolt 12 is embedded in the frame S, with only the front end surface exposed. (2) Installation of bracket 11 The visible surface portion 112 of the bracket 11 is brought into contact with the front surface of the building structure S so that the visible surface bolt hole 115 of the bracket 11 aligns with the position of the lag screw bolt 12. Then, the building structure side bolt 16 is inserted into the visible surface bolt hole 115 and screwed into the female threaded hole 121 of the lag screw bolt 12. In the temporary fixing state before tightening the building structure side bolt 16 all the way, the left-right position of the bracket 11 relative to the building structure S can be adjusted. The distance between the left and right brackets 11 is adjusted so that the support column 101 fits just right, and the visible surface portion 111 is parallel to the vertical direction. Then, the building structure side bolt 16 is tightened all the way to fix the bracket 11 to the building structure S. (3) Installation of support column 101 The lower end of the support column 101 is placed between the facing surfaces 111 of the left and right brackets 11. The through holes formed on the left and right sides of the support column 101 are aligned with the facing bolt holes 113. Then, the support column side bolt 13 is inserted into one of the facing bolt holes 113 on the left or right, and passed through the through hole in the support column 101 and the other facing bolt hole 113. The support column side nut 14 is screwed onto the tip of the support column side bolt 13. In the temporary fixing state before tightening the support column side nut 14 all the way, the front-rear position of the support column 101 relative to the bracket 11 can be adjusted. The position is adjusted so that the direction in which the support column 101 extends is vertical. Then, the support column side nut 14 is tightened all the way to fix the support column 101 to the bracket 11. At this time, the support column 101 is separated from the front of the structure S to the front. Furthermore, the support column side screws 15 are inserted into the screw holes 114 on the surface of the bracket 11 and screwed into the left and right sides of the support column 101. After that, the core material 102 is inserted into the support column 101 and the support column 101 and the core material 102 are screwed together. (4) Installation of panel section 2 An upper frame 211, a lower frame 212, and vertical frames 213 (end vertical frames 214) are attached to the four sides of the glass panel 21. A coping plate 222 of the coping 22 is attached to the upper end of the support column 101. A lower furring strip 23 is attached to the front of the middle section of the support column 101 in the vertical direction. A vertical support member 24 is attached to the area from the upper end of the front of the support column 101 to directly above the lower furring strip 23. The glass panel 21 is attached to these coping plate 222, lower furring strip 23, and vertical support member 24. At this time, the lower ends of the vertical engaging portions 213b of the left and right vertical frames 213 (end vertical engaging portions 214b of the end vertical frames 214) are inserted into the upper end of the vertical receiving groove 247 and engaged, and the glass panel 21 is moved downward. Then, the lower end of the glass panel 21 (lower frame body 212a) is placed on the panel support portion 233 of the lower furring strip 23, and the lower engaging portion 212b is engaged with the lower receiving groove portion 232, and the upper engaging portion 211b is engaged with the upper receiving groove portion 223. This fixes the glass panel 21 in place. Then, the coping body 221 is attached to the coping board material 222. (5) Installation of the crossbar 3 Horizontal brackets 33 are attached to the left and right sides of the support column 101. A horizontal bar body 31 is attached so as to be horizontal to the horizontal brackets 33 that are opposite each other on the left and right. Then, a horizontal bar joint plate 32 is attached to the lower end of the horizontal bar body 31. (6) Installation of the louver section 4 Multiple base members 411 are attached to the lower part of the front panel section 2 of the support column 101. Each base member 411 is spaced apart vertically. Then, a tip member 412 is attached to each base member 411. (7) Installation of the drain section 5 A drip edge material 51 is attached to the lower end of the front of the support column 101. The drip edge material 51 is secured to the front and lower end surfaces of the support column 101 by screwing it in place.

[0032] The above construction procedure is just one example, and some of the steps may be rearranged. For example, the panel section 2, horizontal bar 3, louver section 4, and drip edge section 5 may be installed in any order.

[0033] With the handrail 100 of this embodiment configured in this way, the lag screw bolts 12 are firmly fixed to the wooden frame S, so the handrail 100 itself is installed with sufficient strength relative to the frame S. The lag screw bolts 12 are embedded in the frame S in a direction extending horizontally, and the wind pressure acting on the handrail 100 becomes a load in the tensile / compressive direction (the direction in which the lag screw bolts 12 extend) relative to the lag screw bolts 12, making it strong against wind pressure. In other words, the lag screw bolts 12 exhibit greater resistance to loads in the tensile / compressive direction (the direction in which the lag screw bolts 12 extend) than to loads in the shear direction (the direction perpendicular to the direction in which the lag screw bolts 12 extend). In the present invention, since the lag screw bolts 12 are embedded in the frame S in a direction extending horizontally, the tensile / compressive direction of the lag screw bolts 12 is the horizontal direction. The main loads acting on the handrail 100 are its own weight acting vertically and wind pressure acting horizontally, with the wind pressure being greater. Therefore, only a small amount of its own weight acts on the lag screw bolt 12 in the shear direction, while a large amount of wind pressure acts in the tensile and compressive directions, so that appropriate strength is exerted in each direction. Furthermore, the lag screw bolt 12 to be used in the handrail 100 can be easily selected based on the expected wind pressure and the strength of the lag screw bolt 12 in the tensile and compressive directions.

[0034] Furthermore, since the support column 101 is positioned at a distance from the front of the structure S, when the support column 101 swings in the front-to-back direction due to wind pressure or the like, it prevents the support column 101 from digging into the structure S and damaging it. In addition, since the bracket 11 is fixed to two lag screw bolts 12 positioned vertically, it exhibits higher resistance to loads in the front-to-back (horizontal) direction on the support column 101. The wider the distance between the two upper and lower lag screw bolts 12, the higher the resistance.

[0035] Furthermore, since the bracket 11 is bolted to the female screw hole 121 on the front end surface of the lag screw bolt 12, the workability is good. Also, since the two brackets 11 are fixed to the lag screw bolts 12 which are positioned on the left and right, and the support column 101 is sandwiched between the two brackets 11, it exhibits higher resistance to loads in the left-right direction (horizontal direction) on the support column 101. In addition, since the lag screw bolt 12 can be installed using a dry method without adhesive, there is no problem even if it is embedded in the structure S in a horizontal direction. That is, in the case of anchors that use adhesive, if they are oriented horizontally, it is a problem that the amount of adhesive injected at the back of the pilot hole cannot be confirmed, but this problem does not occur with the lag screw bolt 12. Also, since the support column 101 is attached to the front of the structure S, the effective projection dimension of the structure S is increased.

[0036] The present invention is not limited to the embodiments described above, and within the scope of the invention, the shape and structure of each part can be appropriately modified considering the conditions of the installation location and design considerations. For example, the load-bearing capacity requirements can be met by appropriately changing the length of the lag screw bolts to accommodate differences in the structure of the building frame (thickness of the exterior wall, thickness of the air layer, thickness of the furring strips, etc.). Furthermore, the load-bearing capacity can be increased by increasing the vertical length of the bracket and thereby increasing the distance between the upper and lower fixing positions (bolt positions) on the building frame and the support column, using the lever principle. In addition, only the panel portion may be attached to the support column, or only the louver portion may be attached. Moreover, any other member, such as vertical lattices or grid lattices, may be attached. Various such members may be prepared, and one of them may be selected and attached to the support column. [Explanation of symbols]

[0037] 11 brackets 12 lag screw bolts 101 Post S frame

Claims

1. A handrail installed on a structure made of wood material, It consists of a metal support post, a bracket, and a lag screw bolt. The aforementioned lag screw bolt is embedded in the structure in a direction extending horizontally. The bracket is positioned on the front side of the frame and fixed to the lag screw bolt. The handrail is characterized in that the support column is positioned on the front side of the frame and fixed to the bracket.

2. The handrail according to claim 1, characterized in that the support column is positioned at a distance from the front surface of the building structure toward the front.

3. Each of the aforementioned support columns is provided with a plurality of lag screw bolts arranged at vertical distances from each other, The handrail according to claim 1 or 2, characterized in that the bracket is fixed to a plurality of the lag screw bolts.

Images