KR20190042843A - Floor plate unit for footbridge and extension footbridge having the same - Google Patents

Abstract

Disclosed are a floor plate unit for a footbridge and an extended footbridge having the same. According to one aspect of the present invention, the floor plate unit for a footbridge, which is installed on a floor frame of a footbridge through which people or bicycles pass and forms a floor plate, includes: plate-shaped parts which is adjacent to each other and in which a plurality of box-shaped hollow portions is formed in a longitudinal direction; and a first coupling part including a first flange extended to the outside from an upper end of one side of the plate-shaped part to be formed along the longitudinal direction of the plate-shaped part and having a fastening hole for being fastened to the floor frame, a first engaging hook cut downwardly from the first flange to be extended, and a second engaging hook cut downwardly from a central portion of one side of the plate-shaped part to be formed.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a floor plate unit for a foot bridge,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bottom bridge unit for a bridge bridge and an extended bridge including the same. More specifically, the present invention relates to a bottom bridge unit for a bridge bridge capable of economically and quickly constructing a bottom bridge of a small bridge bridge having a small operating load that can be carried by people, bicycles, and the like, and an extension bridge having the bridge bridge unit.

In recent years, there has been an increase in the number of construction of footbridges that can carry people, bicycles, etc. on riverside roads, ramp roads where mountain slopes are formed, mountainous roads due to an increase in desire for leisure activities and increase in leisure activity population.

A pedestrian-only bridge capable of carrying people or bicycles is a small-scale bridge having a small operating load unlike a general bridge subjected to a large working load carried by a vehicle. The small working load can simplify the structure of the bridge, It is necessary to construct.

On the other hand, in the foot bridge, since people and bicycles directly walk, nature-friendly wood, synthetic wood, etc. often form a wooden floor plate. To support such wooden floor plate, a separate joist And joins the wooden deck to the joist.

However, it is difficult to economically and quickly construct the bridge due to the installation of the joist line, and there is a difficulty in maintenance of the bottom plate due to breakage and warping of the wooden bottom plate in the process of using the bridge.

Korean Registered Patent No. 10-1306114 (Announcement 2019.09.09)

The present invention can provide a bottom bridge unit for a bridge bridge capable of economically and quickly constructing a bottom bridge of a small bridge bridge having a small operating load that can be carried by a person or a bicycle, and an extended bridge having the bridge bridge unit.

According to one aspect of the present invention, there is provided a foot bridge unit for a foot bridge, which is installed on a floor frame of a foot bridge to which a person or a bicycle travels, the foot bridge unit comprising: Wow; A first flange extending outwardly from an upper end of one side of the plate portion and formed along the longitudinal direction of the plate portion and having a fastening hole for fastening to the bottom frame, and a second flange extending downwardly from the first flange, And a first engaging portion including a hook and a second engaging hook bent downward at a central portion of one side of the plate portion.

The bottom plate unit for bridging may further include a trench formed on the other side of the plate-shaped portion and having a drain passage opened upward along the longitudinal direction of the plate-shaped portion.

The bottom plate unit for bridging includes a second flange extending outward from a lower end of the other side of the plate-like portion and formed along the longitudinal direction of the plate-shaped portion, a third hooking hook extending upwardly from the second flange, And a second engaging portion including a fourth engaging hook formed by bending upward from the other central portion of the plate-shaped portion.

The trench may include a trench in which a drain passage is opened upward along the longitudinal direction of the plate portion; A third flange extending outwardly from an upper end of the trench at one side of the trench and formed along a longitudinal direction of the trench, a fifth hook extending downwardly from the third flange and extending from the center, And a third engaging portion having a sixth engaging hook formed on the second engaging portion.

The bottom frame may further include an elongated slot hole formed therein and a fastening means for passing through the slot hole and the fastening hole and coupling the bottom plate unit to the bottom frame.

The apparatus may further include a drain plate covering the upper end of the drain path and having a drain hole into which the drain water flows.

Sliding grooves are formed along the longitudinal direction on both sides of the upper end of the drainage channel, and the drainage plate can be slidably coupled in a state where both sides are inserted into the sliding groove.

Wherein the bottom plate unit is coupled to the other bottom plate unit so that the first coupling unit is opposed to the first coupling unit, the first coupling unit facing each other is engaged with the bottom plate to form the bottom plate, .

The bottom plate unit may be made of a composite material including glass fibers.

According to another aspect of the present invention, there is provided an extension bridge extending from a side of a slab of a bridge to which a person or a bicycle passes, having one end coupled at a side of the slab and extending in a lateral direction, A plurality of lateral brackets installed to be installed; And the bottom plate unit is disposed such that both ends thereof are supported by the lateral brackets adjacent to each other and the side ends thereof are coupled to each other to form a bottom plate.

Wherein the extended bridges include: a parapet supporting portion coupled to the bridge in a direction of an axis of the bridge so as to be supported at the other end of the transverse brackets adjacent to each other; And a railing support coupled to the railing support.

The handrail support portion includes a box main body in which a box-like hollow portion is formed in the longitudinal direction;

And a cover portion extending from a side end of the box body and surrounding the other end of the lateral bracket.

The parapet-supporting part may be made of a composite material including glass fibers.

A coating film on which an anti-slip surface is formed may be packaged on the bottom plate of the bottom plate unit.

According to the embodiment of the present invention, it is possible to economically and quickly construct a bottom plate of a small foot bridge having a small operating load that can be carried by a person or a bicycle.

1 is a perspective view of a bottom plate unit according to an embodiment of the present invention;
2 is a sectional view of a bottom plate unit according to an embodiment of the present invention;
3 is a view for explaining a construction method of a bottom plate unit according to an embodiment of the present invention.
4 is a view showing a coupled state of a bottom plate unit according to an embodiment of the present invention.
5 is a view of a drain pan coupled to a bottom plate unit according to one embodiment of the present invention.
6 is an enlarged foot bridge coupled to a bottom plate unit in accordance with an embodiment of the present invention.
Figure 7 illustrates a drain module coupled to a bottom plate unit according to another embodiment of the present invention.
8 is a view for explaining a construction method of a bottom plate unit according to another embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The terms first, second, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an embodiment of a foot bridge unit according to the present invention and an extended bridge having the same will be described in detail with reference to the accompanying drawings. In the following description, And the description thereof will be omitted.

FIG. 1 is a perspective view of a bottom plate unit according to an embodiment of the present invention, and FIG. 2 is a sectional view of a bottom plate unit according to an embodiment of the present invention. FIG. 3 is a view for explaining a construction method of a bottom plate unit according to an embodiment of the present invention, and FIG. 4 is a view showing an assembled state of a bottom plate unit according to an embodiment of the present invention. 5 is a view illustrating a drain plate coupled to a bottom plate unit according to an embodiment of the present invention. 6 is a view illustrating an extended bridge coupled to a bottom plate unit according to an embodiment of the present invention.

1 to 6 show a bottom plate unit 10, a hollow portion 12, a plate portion 14, a fastening hole 16, a first flange 20, a first hooking hook 22, The first hook portion 24, the first coupling portion 26, the drainage passage 28, the trench portion 30, the drain hole 31, the drain plate 32, the third hooking hook 34, The second engaging portion 38, the third flange 40, the fifth engaging hook 42, the sixth engaging hook 44, the third engaging portion 46, the epoxy 48, the bottom frame 52, A fixing bolt 54, a fixing nut 56, and a fastening means 58 are shown.

The bottom plate unit 10 according to the present embodiment is a bottom bridge unit 10 for a foot bridge installed on a bottom frame 52 of a foot bridge to which a person or a bicycle passes and forms a bottom plate, A plate-like plate portion 14 in which the hollow portion 12 is formed in the longitudinal direction; A first flange 20 extending outward from an upper end of one side of the plate portion 14 and formed along the longitudinal direction of the plate portion 14 and having a fastening hole 16 for fastening to the bottom frame 52 A first hooking hook 22 bent downwardly from the first flange 20 and a second hooking hook 24 bent downward at a central portion of one side of the plate- And a first engaging portion 26 including a first engaging portion 26 and a second engaging portion 26. [

Bridge is a small bridge structure that can be constructed along the sides of the bridge, flat on the ground surface, along the slope of the river bank, mountain roads, and with small operating load that pedestrians and bicycles can move.

The bottom bridge unit 10 according to the present embodiment can be made of a composite material containing glass fibers. Durability is improved because it contains glass fiber. It is easy to mold by using it as a composite material.

The bottom plate unit 10 according to the present embodiment is connected to each other to form a bottom plate of a bridge bridge. The bottom plate unit 10 is coupled to a bottom frame 52 forming a top bridge structure to form a bottom plate .

The plate-like portion (14) is a plate-shaped member adjacent to each other and having a plurality of box-like hollow portions (12) formed in the longitudinal direction. Referring to FIGS. 1 and 2, a plurality of box-shaped hollow portions 12 are formed adjacent to each other along the longitudinal direction of the bottom plate unit 10. By forming the box-shaped hollow portion 12 therein, it has an optimum cross-sectional structure capable of resisting warping, thereby reducing the weight of the member.

The first engaging portion 26 is formed along the longitudinal direction of the plate portion 14 and extends outward from the upper end of one side of the plate portion 14 and has a fastening hole 16 for fastening to the bottom frame 52 A first hooking hook 22 bent downwardly from the first flange 20 and a second hooking hook 22 bent downward at a central portion of one side of the plate- And a hook (24).

The first engaging portion 26 is formed along the longitudinal direction at one side of the plate-like portion 14 for engagement between the bottom plate units 10 whose side ends are adjacent to each other.

2, the first flange 20 is formed along the longitudinal direction of the plate-shaped portion 14 and extends outward from one end of the plate-shaped portion 14, and has a fastening hole (Not shown). Referring to the lower floor plate unit 10 shown in FIG. 3, when the bottom plate unit 10 according to the present embodiment is turned upside down, the first flange 20 is positioned at a lower portion of one side of the plate- Able to know.

The fastening hole 16 is for coupling the bottom plate unit 10 to the bottom frame 52 and has a long slot hole (not shown) formed in the bottom frame 52 corresponding to the fastening hole 16. The reason for forming the slot hole long is to facilitate positioning of the fixing bolt 54 when it is fastened, and to cope with expansion and contraction of the bottom plate unit 10 due to heat when using a foot bridge. The fixing bolt 54 is inserted into the slot hole of the bottom frame 52 and the fastening hole 16 of the bottom plate unit 10 are aligned with each other and the fastening nut 56 is fastened to fasten the bottom plate unit 10 to the floor And can be fixed to the frame 52.

The first hooking hook 22 extends downwardly from the first flange 20 and extends from the first flange 20 to be fastened in a snap fit manner with another hooking hook 245, A stopping jaw is formed.

The second hooking hook 24 is bent downward at a central portion of one side of the plate-like portion 14 and extends downwardly from the central portion of one side of the plate-like portion 14 and extends downwardly like the first hooking hook 22, A stopping jaw is formed.

3 and 4, the bottom plate includes a plurality of bottom plate units 10 coupled to each other. The bottom plate unit 10 includes a plurality of bottom plate units 10, The unit 10 is turned upside down so that the first engaging portions 26 opposed to each other are engaged with each other to form a bottom plate.

The bottom plate unit 10 is turned upside down so as to communicate with the slot holes of the bottom frame 52 and the fastening holes 16 of the bottom plate unit 10 are disposed on the top of the bottom frame 52 and the fixing bolts 54 ) And a fixing nut (56). The first engaging portion 26 of the bottom plate unit 10 fixed to the bottom frame 52 and the first engaging portion 26 of the other engaging bottom plate unit 10 are opposed to each other, When the plate unit 10 is pushed, the first hooking hook 22 of the fastening bottom plate unit 10 and the second hooking hook 24 of the fixed bottom plate unit 10 open within the elastic limit, And the second hooking hooks 24 of the fastening bottom plate unit 10 and the first hooking hooks 22 of the fixed bottom plate unit 10 are engaged with each other in the elastic limit, The bottom plate unit 10 is coupled to the fixed bottom plate unit 10. Between the first engaging portion 26 of the bottom plate unit 10 fixed according to the fastening of the fastening bottom plate unit 10 and the first engaging portion 26 of the fastening bottom plate unit 10, A hollow portion is formed.

When the epoxy 48 is injected into the first hooking hook 22 and the second hooking hook 24 before tightening, the epoxy 48 is cured and the hollow portion 12 is closed, 1 can be prevented from flowing into the hollow portion formed by the first engaging portion 26. In order to prevent the fixing nut 56 in the hollow portion from loosening, the epoxy 48 may be applied to the fastening means 58 before the fastening to prevent the fixing nut 56 from being loosened after curing.

A trench 30 may be formed on the other side of the plate-like portion 14 to drain the bottom after the bottom plate is formed. The trench 30 is formed with a drainage passage 28 having an upwardly opened length along the longitudinal direction of the plate portion 14 and a drainage plate 32 having a drainage hole 31 formed therein is disposed at an opening portion of the drainage passage 28 Drain the effluent by filtering the foreign matter. A drainage port may be formed at the bottom of the drainage passage 28 at regular intervals.

3, the drainage passage 28 of the trench 30 is disposed toward the bottom plate unit 10 when the bottom plate unit 10 is turned upside down to engage with the bottom frame 52. Referring to FIG.

5 shows a drain pan 32 according to the present embodiment. The drain pan 32 is formed with a long drain hole 31 in the width direction, and has a long rectangular shape corresponding to the longitudinal direction of the trench 30. 3, a long sliding groove is formed along the longitudinal direction on both sides of the upper end of the drainage passage 28, and the drainage plate 32 is inserted into the sliding groove and slid to connect the drainage plate 32 to the trench 30 .

6 is a view showing an extended bridge connected to the bottom plate unit 10 according to an embodiment of the present invention. 6 shows a bottom plate unit 10, a slab 60, a lateral bracket 62, a railing support 63, a box body 64, a railing 65, and a cover 66.

Fig. 6 shows an extension bridge to which the above-described bridge bridge unit 10 is applied. The extension bridge is an additional bridge for the installation of a separate bridge on the side of the slab 60 of the existing bridge. The existing bridge can be attached to a bridge which does not have a separate walking zone for passage of people or bicycles.

 The extension bridge according to the present embodiment is an extension bridge extending from a side end of a slab 60 of a bridge to which a person or a bicycle passes and has one end joined at a side end of the slab 60 and extending in the lateral direction, A plurality of lateral brackets (62) spaced apart from each other along a direction of the lateral brackets; And a bottom plate unit 10 disposed so as to be supported at opposite ends of the transverse brackets 62 adjacent to each other and having side ends joined to each other to form a bottom plate.

Referring to FIG. 6, the lateral brackets 62 are coupled so as to protrude from the side ends of the slabs 60 of the bridge, and a plurality of the lateral brackets 62 are installed along the direction of the throttle at regular intervals. In this embodiment, the ends of the lateral brackets 62 are fixed to the slabs 60 of the bridges using anchor members, whereby the lateral brackets 62 are fixed to the slabs 60 in the form of cantilevers.

The above-described bottom plate unit 10 is disposed in the transverse brackets 62 adjacent to each other in the throttle direction so that both ends of the bottom plate unit 10 are supported in the longitudinal direction. 6, the bottom plate unit 10 positioned on the fixed end side of the lateral bracket 62 is disposed on the transverse bracket 62 in the upside down direction, The bottom plate unit 10 is fixed using the fixing bolts 54 and the fixing nuts 56 in a state where the slot holes of the bottom plate unit 62 are aligned with each other.

Another bottom plate unit 10 is disposed in the extending direction of the bottom plate unit 10 fixed to the transverse bracket 62 so that the drainage path 28 of the trench 30 is directed upward The plate unit 10 and the fixed bottom plate unit 10 are engaged. In this manner, the bottom plate unit 10 is installed along the lateral bracket 62 in the throttle direction to form the bottom plate of the extended bridge. When the bottom plate construction according to the installation of the bottom plate unit 10 is completed, the coating film on which the anti-slip roughness is formed can be packed on the bottom plate.

According to the present embodiment, the bottom plate unit 10 can be installed continuously without providing a separate string or the like in the lateral bracket 62, so that the bottom plate can be quickly installed.

The lateral bracket 62 is inclined downwardly from one end to the other end to be coupled to the side end of the slab 60 of the bridge so that the outer surface of the bottom plate can be drained outwardly by the natural gradient after the installation of the bottom plate, The plate unit 10 can be installed.

In this embodiment, the railing support portion 63 is provided at the other end (free end) of the adjacent lateral bracket 62 so as to prevent pedestrians, bicycles, And the railing support portion 63 is provided with a railing support 65 for installing the railing bar.

The parapet supporting portion 63 according to the present embodiment includes a box body 64 in which a box-like hollow portion 12 is formed in the longitudinal direction; And a cover portion 66 extending from a side end of the box body 64 and surrounding the other end of the lateral bracket 62. The box body 64 is configured to support the railing pillars 65 and has a box-shaped hollow portion 12 formed therein to reduce the weight. The box body 64 is coupled to the lateral bracket 62 and the cover portion 66 extending from the side end of the box body 64 is exposed to the visual field by engaging the railing support 63 with the lateral bracket 62. [ The side edge of the lateral bracket 62 is wrapped to improve the appearance.

The balustrade support unit 63 according to the present embodiment can be made of a composite material including glass fibers as in the case of the above-described bottom plate unit 10. Durability is improved because it contains glass fiber. It is easy to mold by using it as a composite material.

FIG. 7 is a view showing a drainage module coupled to a bottom plate unit 10 according to another embodiment of the present invention, and FIG. 8 is a view illustrating a construction method of a bottom plate unit 10 according to another embodiment of the present invention Fig.

7 and 8, the bottom plate unit 10 ', the first flange 20, the first hooking hook 22, the second hooking hook 24, the first engaging portion 26, the drainage passage 28, A trench 30, a drain hole 31, a drain plate 32, a second flange 33, a third latching hook 34, a fourth latching hook 36, a second coupling portion 38, The module 39, the third flange 40, the fifth hooking hook 42, the sixth hooking hook 44, and the third engaging portion 46 are shown.

The bottom plate unit 10 'according to the present embodiment has engaging portions 26 and 38 formed at both ends thereof to enhance the expandability of the coupling between the bottom plate units 10'. That is, the first coupling portion 26 is formed at one end of the plate-like portion 14 and the second coupling portion 38 is formed at the other end of the plate-like portion 14.

The second engaging portion 38 includes a second flange 33 extending outward from the other lower end of the plate portion 14 along the longitudinal direction of the plate portion 14 and a second flange 33 extending upward from the second flange 33 And a fourth hooking hook 36 which is bent upward at the other central portion of the plate-like portion 14. The fourth hooking hook 36 is formed by bending the third hooking hook 34 and the fourth hooking hook 36, respectively.

8, the second engaging portion 38 of the inverted left bottom plate unit 10 'and the first engaging portion 26 of the central bottom plate unit 10' are coupled to each other, (10) is expanded.

Meanwhile, the bottom plate unit 10 'according to the present embodiment is not provided with a trench for draining rainwater, and may be provided with a drainage module 39 separately.

Referring to FIG. 7, the drainage module 39 according to the present embodiment includes a trench 30 having a drainage passage 28 opened upward along the longitudinal direction of the plate-like portion 14; A third flange 40 extending outwardly from the upper end of one side of the trench 30 and formed along the longitudinal direction of the trench 30 and a second flange 40 extending downwardly from the third flange 40, And a third engaging portion 46 having a sixth engaging hook 44 bent downward at a central portion of one side of the trench 30.

8, when the second coupling portion 38 of the central bottom plate unit 10 'is opposed to the third coupling portion 46 of the drain module 39, the drain module 39 is lowered The fourth engaging hook 36 of the second engaging portion 38 and the fifth engaging hook 42 of the drain module 39 engage with each other and the third engaging hook 36 of the second engaging portion 38 The drainage module 39 is engaged with the bottom plate unit 10 'while the sixth hooking hook 44 of the drainage module 39 and the sixth hooking hook 44 of the drainage module 39 are engaged with each other. The drainage plate 32 described above may be coupled to the drainage passage 28 of the drainage module 39.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. It will be understood that the invention may be varied and varied without departing from the scope of the invention.

Many embodiments other than the above-described embodiments are within the scope of the claims of the present invention.

10, 10 ': bottom plate unit 12: hollow part
14: plate portion 16: fastening hole
20: first flange 22: first hooking hook
24: second hook 26: first engaging portion
28: drainage passage 30: trench section
31: drain hole 32: drain plate
34: third hooking hook 36: fourth hooking hook
38: second coupling portion 39: drainage module
40: third flange 42: fifth hook Hook
44: sixth hooking hook 46: third engaging portion
48: epoxy 52: bottom frame
54: fixing bolt 56: fixing nut
58: fastening means 60: slab
62: lateral bracket 63:
64: box body 65: railing pole
66: Cover part

Claims (14)

A bottom bridge unit for a bridge bridge, which is installed on a bottom frame of a bridge bridge to which a person or a bicycle passes and forms a bottom plate,
Like plate-like portion in which a plurality of box-shaped hollow portions are formed in the longitudinal direction adjacent to each other;
A first flange extending outwardly from an upper end of one side of the plate portion and formed along the longitudinal direction of the plate portion and having a fastening hole for fastening to the bottom frame, and a second flange extending downwardly from the first flange, And a first engaging portion including a hook and a second engaging hook bent downward at a central portion of one side of the plate portion.
The method according to claim 1,
Further comprising: a trench portion formed on the other side of the plate-shaped portion and having a drain passage opened upward along the longitudinal direction of the plate-shaped portion.
The method according to claim 1,
A second flange extending outwardly from the other lower end of the plate portion and formed along a longitudinal direction of the plate portion, a third hook extending upwardly from the second flange and extending upwardly from the other central portion of the plate portion, Further comprising a second engaging portion including a fourth engaging hook formed to be bent.
The method of claim 3,
A trench in which a drain passage is opened upward along the longitudinal direction of the plate portion; A third flange extending outwardly from an upper end of the trench at one side of the trench and formed along a longitudinal direction of the trench, a fifth hook extending downwardly from the third flange and extending from the center, Further comprising: a drainage module including a third engagement portion having a sixth latching hook formed in the lower portion of the bottom plate.
The method according to claim 1,
Wherein the bottom frame has an elongated slot hole,
Further comprising fastening means for coupling the bottom plate unit to the bottom frame through the slot hole and the fastening hole.
The method according to claim 2 or 4,
Further comprising: a drain plate covering the upper end of the drainage path and formed with a drain hole through which water flows.
The method according to claim 6,
Wherein a sliding groove is formed along the longitudinal direction on both sides of the upper end of the drainage channel, and the drainage plate is slidably coupled in a state where both sides are inserted into the sliding groove.
The method according to claim 1,
Wherein the bottom plate unit is coupled to the other bottom plate unit so that the first coupling unit is opposed to the first coupling unit, the first coupling unit facing each other is engaged with the bottom plate to form the bottom plate, Wherein the bottom plate unit is a bottom plate unit for a foot bridge.
The method according to claim 1,
Wherein the bottom plate unit is made of a composite material including glass fibers.
As an extension bridge extending from the side of a slab of a bridge to which a person or a bicycle passes,
A plurality of transverse brackets, one end of which is coupled at the side of the slab and extends in the transverse direction, and is spaced apart from one another along the longitudinal direction of the bridge;
And a bottom plate unit according to any one of claims 1 to 9, wherein the bottom plate unit is arranged so that both ends thereof are supported by the lateral brackets adjacent to each other, and the side ends are joined to each other to form a bottom plate.
11. The method of claim 10,
A parapet supporting part coupled in the direction of the axis of the bridge so as to be supported at the other end of the transverse brackets adjacent to each other;
And further comprising a railing pillar coupled to the railing support.
12. The method of claim 11,
The parapet-
A box body in which a box-like hollow portion is formed in a longitudinal direction;
And a cover portion extending from a side end of the box body and surrounding the other end of the lateral bracket.
13. The method of claim 12,
The parapet-
An expanded footbridge comprising a composite material comprising glass fibers.
11. The method of claim 10,
Characterized in that a coating film on which a non-slip surface roughness is formed is packed on an upper part of the bottom plate constituted by the bottom plate unit.

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