KR101719154B1 - Girder structure and manufacturing method girder - Google Patents

Abstract

The present invention relates to a girder structure, and a girder manufacturing method. Vertical load generated by a web steel plate can be distributed to a center of a girder main body and one end part and the other end part of the girder main body, respectively. More specifically, one end part and the other end part of an upper flange unit of the girder main body are not bent by vertical load since the end parts of the upper flange unit of the girder main body do not protrude toward the outside of a reinforcement flange unit, so that the girder main body can more stably support the web steel plate.

Description

 Technical Field [0001] The present invention relates to a girder structure and a girder manufacturing method,

The vertical load caused by the double shear plate can be dispersed in the center of the girder main body and the one end portion and the other end direction of the girder main body respectively, and in particular, the one end portion and the other end portion of the upper flange portion of the girder main body, The girder body is not likely to buckle due to the vertical load caused by the double steel plate, so that the girder body can more stably support the double steel plate And a method of manufacturing the girder.

Generally, H-shaped steel is composed of two flanges and webs, and has a great resistance to bending moment (bending strength) in a specific direction, and is used extensively as a construction member. In recent years, the length of a reinforcing member A reinforcing device for an H-shaped column and a reinforcing method for a H-shaped steel column using the reinforced H-shaped steel column are proposed in Korean Patent Registration No. 10-1414242 There is a bar.

However, in the case of Korean Patent Registration No. 10-1414242, since one end portion and the other end portion of two flanges extend in a predetermined length in the outer direction of the reinforcing plate, the one end portion and the other end portion of the two flanges Is buckled by a vertical load applied to the flange, so that it is not possible to stably support a structure such as a double sheath.

Korean Registered Patent Publication No. 10-1414242

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a girder structure in which a vertical load by a double shear plate can be dispersed in the center of a girder main body and in one end and another end direction of the girder main body, Since one end and the other end of the flange portion are not projected outwardly of the reinforcing flange portion, there is no possibility that one end portion and the other end portion of the upper flange portion of the girder main body are buckled by the vertical load by the double steel plate, The present invention provides a girder structure and a girder manufacturing method that can more stably support a double steel plate.

According to an aspect of the present invention, there is provided an air bag for a vehicle comprising: an upper flange portion and a lower flange portion; A web formed between the upper flange portion and the lower flange portion and connecting the upper flange portion and the lower flange portion; A side reinforcement flange portion formed between one end portion of the upper flange portion and one end portion of the lower flange portion and another reinforcement flange portion formed between the other end portion of the upper flange portion and the other end portion of the lower flange portion And a reinforcing flange portion for distributing a load applied to the upper flange portion to one end portion and the other end portion of the upper flange portion, respectively.

It is preferable that a protruding member protruding outwardly of the reinforcing flange portion is formed on the outer surface of the reinforcing flange portion so as to extend in the front-rear direction of the reinforcing flange portion.

In addition, it is preferable that slits are formed in the reinforcing flange portion at regular intervals.

The girder main body is provided with a connecting portion for connecting the rear side of one of the girder main bodies and the other side of the other main girder main body. The connecting portion is fixed to one side rear side and the other side rear side of one of the girder main bodies, A vertical connection plate to which one side of the other main body of the girder is coupled to the other side of the other side; An angle at which an upper portion is fastened to a lower portion of an outer surface of the vertical connecting plate; And a lower connecting plate on one side and the other on the lower side of the angle, respectively.

Further, between any one of the web and one reinforcing flange of the girder main body and between any one of the web and the other reinforcing flange of the girder main body, between the web of the other girder main body and one reinforcing flange, A reinforcing plate is preferably formed between the web of the girder body and the other reinforcing flange portion at a predetermined interval in the vertical direction of the girder body.

In addition, it is preferable that a magnetic force generating unit attached to the lower part of the lap belt provided on the upper part of the girder main body is provided on the upper part of the girder main body.

Here, the magnetic force generating unit includes: a body hinged to the lower portion of the outer surface of the reinforcing flange of the girder body; And a magnetic force generating member provided at an upper portion of the body and attached to a lower portion of the lapping plate.

In addition, it is preferable that a shaft member extending in the front-rear direction of the body is formed on the front and rear sides of the body of the magnetic force generating unit, or on the front and rear sides of the body.

Preferably, the reinforcing flange portion is fixed to one end portion and the other end portion of the upper flange portion and the lower flange portion, respectively, and the girder body, which is a prefabricated product composed of the web.

Alternatively, it is preferable that the upper portion of one of the vertical plate members is horizontally and vertically bent sequentially from the upper portion of the other side of the one vertical plate member toward the upper side of one side with respect to the lower portion of one vertical plate member, Do.

And a) preparing an upper flange portion and a lower flange portion, a web, and a reinforcing flange portion; b) securing a web between the upper flange portion and the lower flange portion; and c) a reinforcement member having a reinforcing flange portion and a reinforcing flange portion on the other side, which are respectively provided between one end of the upper flange portion and one end portion of the lower flange portion and between the other end portion of the upper flange portion and the other end portion of the lower flange portion, And forming a girder main body by fixing the flange portion.

The present invention also provides a method of manufacturing a steel pipe, comprising the steps of: a) preparing a prefabricated steel section composed of an upper flange portion and a lower flange portion, and a web formed between the upper flange portion and the lower flange portion;

and b) forming a girder body by fixing a reinforcing flange portion formed of one side reinforcement flange portion and the other side reinforcement flange portion to one end portion and the other end portion of the section steel, respectively do.

Further, the present invention provides a method of manufacturing a semiconductor device, comprising the steps of: a) preparing one vertical plate member; and b) vertically bending the upper portion of one vertical plate member from one upper side to the other upper side of the one vertical plate member horizontally and vertically in succession with respect to the lower portion of one vertical plate member to form an upper flange portion and a lower flange portion A web which is formed between the upper flange portion and the lower flange portion and connects the upper flange portion and the lower flange portion, and a web between one end of the upper flange portion and one end of the lower flange portion, And a reinforcing flange portion constituted by one side reinforcement flange portion and another side reinforcement flange portion which are respectively formed between the other end portion of the lower flange portion and the other end portion of the lower flange portion, .

The present invention relates to a girder main body having a girder main body and a girder main body through a reinforcing flange portion provided between one end portion of an upper flange portion of the girder main body and one end portion of a lower flange portion and between the other end portion of the upper flange portion and the other end portion of the lower flange portion, The vertical load caused by the double steel plate applied to the upper flange portion can be dispersed in the center of the upper flange portion of the girder main body and in the one end portion and the other end portion direction of the upper flange portion, There is no possibility that one end and the other end of the upper flange portion of the girder main body are buckled by the vertical load caused by the double shear plate, There is an effect that the double steel plate can be more stably supported.

1 is a perspective view schematically showing a girder structure of the present invention,
Fig. 2 is a front view of Fig. 1,
3 is a perspective view schematically showing a state in which a protruding member is formed on the outer surface of the reinforcing flange portion,
4 is a perspective view schematically showing a state where a slit is formed on the outer surface of the reinforcing flange portion,
5 is a partially cutaway perspective view schematically showing a state in which one of the girder main body and the other of the girder main body and the connecting portion is separated,
FIG. 6 is an assembled perspective view of FIG. 5,
7 is a cross-sectional view taken along line A-A in Fig. 6,
8 is a front view schematically showing a state in which a magnetic force generating member is provided on the outer surface of the girder main body,
Fig. 9 is a plan view of Fig. 8,
10 is an exploded front view schematically showing a state in which the magnetic force generating member is separated from the lid plate
11 is a front view schematically showing a state in which the magnetic force generating member is fixedly attached to the lower portion of the lid plate,
12 is an exploded sectional view schematically showing a state in which the girder main body of the first example is separated,
13 is an assembled cross-sectional view of Fig. 12,
14 is an exploded cross-sectional view schematically showing a state in which the girder main body of the second example is separated,
Fig. 15 is an assembled cross-sectional view of Fig. 14,
16 is a front view sequentially showing the process of forming the girder main body of the third example.
17 is a block diagram schematically showing an example of a girder manufacturing method according to the present invention,
18 is a block diagram schematically showing another example of the girder manufacturing method of the present invention,
19 is a block diagram schematically showing still another example of the girder manufacturing method of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. It is to be understood that the scope of the present invention is not limited to the following embodiments, and various modifications may be made by those skilled in the art without departing from the technical scope of the present invention.

Fig. 1 is a perspective view schematically showing a girder structure of the present invention, and Fig. 2 is a front view of Fig. 1. Fig.

1 and 2, the girder structure of the present invention includes a girder main body 10 composed of an upper flange portion 110 and a lower flange portion 120, a web 130 and a reinforcing flange portion 140 .

The web 130 is vertically formed between a lower central portion of the upper flange portion 110 and an upper central portion of the lower flange portion 120 to connect the upper flange portion 110 and the lower flange portion 120 do.

The reinforcing flange portion 140 includes a reinforcing flange portion 141 and a reinforcing flange portion 142. The vertical flange portion 110 applies a vertical load to the upper flange portion 110, In the direction of one end and the other end, respectively.

The one side reinforcing flange portion 141 is vertically formed between one end of the upper flange portion 110 and one end of the lower flange portion 120.

The other reinforcing flange portion 142 is vertically formed between the other end of the upper flange portion 110 and the other end of the lower flange portion.

3 is a perspective view schematically showing a state in which a projection member is formed on the outer surface of the reinforcing flange portion.

3, an outer surface of the reinforcing flange part 140 is formed with an outer side surface of the reinforcing flange part 140 in order to improve the durability against the torsional external force of the reinforcing flange part 140. [ A protruding member 143 protruding in an arc shape or the like may be formed at predetermined intervals in the vertical direction of the reinforcing flange portion 140 by beading during press working.

The protruding member 143 may extend from the front side of the reinforcing flange portion 140 in the rearward direction.

4 is a perspective view schematically showing a state where a slit is formed on the outer surface of the reinforcing flange portion.

In order to reduce the noise caused by the generation of vibration in the girder main body 10 and to prevent internal corrosion of the girder main body 10 by inducing smooth ventilation into the inside of the girder main body 10, The slit 144 may be formed in the intermediate portion of the reinforcing flange portion 140 by a slotting process during press working.

The slit 144 may extend in a predetermined length in the vertical direction of the reinforcing flange 140 or may extend in the front-rear direction of the flange 140 by a predetermined length.

FIG. 5 is a partially cutaway perspective view schematically showing a state in which one of the girder main body and the other of the girder main body and the connecting portion is separated, and FIG. 6 is an assembled perspective view of FIG.

Next, as shown in FIGS. 5 and 6, a connecting portion 20 for connecting the rear side of one of the girder main bodies 10 and the other side of the other main girder main body may be provided.

The connection unit 20 may include a vertical connection plate 210, an angle 220, and a lower connection plate 230.

The front side of the vertical connecting plate 210 can be fastened to the rear side of one side and the rear side of the other side of the one of the girder main bodies 10 by the fastening member 21.

The rear side of the vertical connecting plate 210 can be fastened by the fastening member 21 to one side of the other side of the other main body 10 and the other side of the other side.

The lower portion of the angle 220 may be horizontally bent in the outer direction of the vertical connection plate 210.

The upper portion of the angle 220 may be fastened to the lower portion of the outer surface of the vertical connection plate 210 by the fastening member 21.

The coupling member 21 sequentially horizontally penetrates one side and the other side of one of the vertical connecting plate 210 and one of the girder main bodies 10 and passes through the upper portion of the angle 220, A fastening bolt (210) horizontally passing through one side and the other side of any one of the girder main bodies (10) horizontally; And a fastening nut 220 screwed to an end of the fastening bolt 210.

The girder main body 10 can be seated on an upper middle portion of the lower connecting plate 230 and one side and the other side of the lower connecting plate 230 can be fastened to the lower portion of the angle 220, As shown in Fig.

The fastening member 22 includes fastening bolts 221 vertically passing through the lower portion of the angle 220 and one side and the other side of the lower connecting plate 230 in a vertical direction, respectively; And a fastening nut 222 screwed to an end of the fastening bolt 221.

7 is a cross-sectional view taken along the line A-A of Fig.

5 and 6, during the process of connecting the rear side of one of the girder main bodies 10 and the other side of the other main girder main body 10 through the connecting portion 20, ) For preventing the shape of one side and the other side of the girder main body (10) from being deformed while one side and the other side of the girder main body (10) are pushed to the inside of the girder main body (10) 30 may be further provided.

7, the reinforcing plate 30 is disposed between the web 130 of one of the girder main bodies 10 and one reinforcing flange portion 141 and between the web 130 of one of the girder main bodies 10 ) And the other reinforcing flange portion 142 at a predetermined interval in the vertical direction of the girder body 10.

The reinforcing plate 30 is provided between the web 130 of the other girder body 10 and the one reinforcing flange 141 and the web 130 of the other girder body 10 and the other reinforcing plate 30. [ And can be horizontally formed in a state of being welded and fixed between the flange portions 142 in the vertical direction of the girder body 10 at regular intervals.

FIG. 8 is a front view schematically showing a state where a magnetic force generating member is provided on the outer surface of the girder main body, and FIG. 9 is a plan view of FIG.

8 and 9, a plurality of magnetic force generating units 40 may be provided on the upper portion of the girder main body 10 at predetermined intervals in the backward direction from the front side of the girder main body 10.

The magnetic force generating unit 40 may be attached and fixed to a lower portion of a flat plate made of metal and horizontally mounted on the upper portion of the girder main body 10. The magnetic force generating unit 40 may be fixed to the upper surface of the girder body 10, It is possible to effectively prevent the shock and vibration generated in the ladder plate due to the vehicle running at the upper part of the ladder plate, thereby preventing the ladder plate from flowing.

More specifically, the magnetic force generating unit 40 may include a body 410 and a magnetic force generating member 420 as shown in FIG.

Any one lower side of the body 410 may be hinged to an upper portion of one reinforcing flange portion 141 of the reinforcing flange portion 140 of the girder body 10. [

One side of the lower body of the other body 410 may be hinged to an upper portion of the other reinforcing flange portion 142 of the reinforcing flange portion 140 of the girder body 10. [

The magnetic force generating member 420, which may be a permanent magnet, may be provided on the body 410.

10 is an exploded front view schematically showing a state in which the magnetic force generating member is separated from the lid plate, and Fig. 11 is a front view schematically showing a state in which the lattice generating member is attached and fixed to the lower portion of the lid plate.

As shown in FIG. 10, the magnetic force generating member 420 together with the upper portion of the body 410 may be rotated in a downward direction of the body 410 by its own weight.

11, the operator causes the magnetic force generating member 420 to rotate along with the upper portion of the body 410 in the downward direction of the lapping plate 3 so that the magnetic force generating member 420 is rotated And can be fixedly attached to the lower portion of the flat plate 3.

Next, as shown in FIG. 9, the front and rear sides of the body 410 of the magnetic force generating unit 40, or the front and rear sides of the body 410, The shaft member 430 may be formed.

The shaft member 430 is pulled downward of the girder main body 10 by using a work tool such as a jack or a tool such as a wrench so as to forcibly separate the magnetic force generating member 420 from the lower portion of the ladder plate 3 .

Between one end of the upper flange portion 110 of the girder main body 10 and one end of the lower flange portion 120 and between the other end of the upper flange portion 110 and the other end portion of the lower flange portion 120 The vertical load of the folded steel plate 3 applied to the upper flange portion 110 of the girder body 10 through the reinforcing flange portion 140 provided on the upper flange portion 140 of the girder body 10, The upper flange portion 110 of the girder main body 10 can be dispersed in the direction of one end and the other end of the upper flange portion 110. Particularly, There is a fear that the one end portion and the other end portion of the upper flange portion 110 of the girder main body 10 are buckled by the vertical load caused by the folded steel plate 3 because they are not projected outwardly of the reinforcing flange portion 140 There is an advantage that the girder main body 10 can more stably support the multiple steel plate 3 The.

Fig. 12 is an exploded front view schematically showing a state in which the girder main body of the first example is separated, and Fig. 13 is a front elevational view of the coupling of Fig.

12 and 13, the upper flange portion 110, the lower flange portion 120, the web 130, and the reinforcing flange portion 140 may be welded to each other as a first example.

Fig. 14 is an exploded sectional view schematically showing a state in which the girder main body of the second example is separated, and Fig. 15 is an assembled sectional view of Fig.

Alternatively, as shown in FIG. 14 and FIG. 15, one end of a prefabricated section steel 100 composed of the upper flange portion 110, the lower flange portion 120, and the web 130, And the reinforcing flange portion 140 is welded and fixed to the other end portion, respectively, so that the girder main body 10 can be formed.

16 is a front view sequentially showing the process of forming the girder main body of the third example.

Alternatively, as shown in Fig. 16, the upper portion of one of the above-mentioned vertical plate members 1 may be positioned on the other upper side of one of the above-mentioned vertical plate members 1 with reference to the lower portion of the vertical plate member 1, The girder body 10 can be formed by horizontally and vertically folding in a direction of the upper side of the girder body.

17 is a block diagram schematically showing an example of a girder manufacturing method according to the present invention.

17, the upper and lower flange portions are prepared (hereinafter, referred to as 'a'). B) a web fixing step (hereinafter referred to as a 'web fixing step' (b) step), c) fixing the reinforcing flange part (hereinafter referred to as step (c)).

12, the upper flange portion 110 and the lower flange portion 120, the web 130, the reinforcing flange portion 130, and the reinforcing flange portion 130, which may be made of various materials such as a rectangular metallic material, (140).

13, the upper and lower ends of the web 130 are welded and fixed to the lower middle portion of the upper flange portion 1110 and the upper middle portion of the lower flange portion 120, respectively, .

13, the step between the one end of the upper flange part 110 and one end of the lower flange part 120 and the other end of the upper flange part 110 and the lower end part of the lower flange part 120, The upper and lower portions of the reinforcing flange portion 140 constituted by the one side reinforcement flange portion 141 and the other side reinforcement flange portion 142 are respectively welded and fixed between the other ends of the girder main body 120 10).

18 is a block diagram schematically showing another example of the girder manufacturing method of the present invention.

18, the method of manufacturing a girder according to the present invention may further include the steps of: a) preparing a steel sheet (hereinafter referred to as a step a) and b) b) step ').

14, the step a) may include a step of forming the upper flange part 110, the lower flange part 120, and the upper flange part 110 and the lower flange part 120, which are formed between the upper flange part 110 and the lower flange part 120, And the web 130, which is a prefabricated product.

15, the step b) of FIG. 15 includes the step of inserting the reinforcing flange portion 142 formed of the one side reinforcement flange portion 141 and the other side reinforcement flange portion 142 at one end and the other end of the section steel 100, respectively, The upper and lower portions of the girder body 140 are welded and fixed to form the girder main body 10.

19 is a block diagram schematically showing still another example of the girder manufacturing method of the present invention.

19, the method of manufacturing a girder according to the present invention is a method of manufacturing a girder according to another embodiment of the present invention, which comprises: a) one vertical plate member preparing step (hereinafter referred to as' a) (Hereinafter referred to as a 'b' step).

In step a) of another example, as shown in FIG. 16A, one vertical plate 1 made of various materials such as a rectangular metal material is prepared.

The step b) of the other example may be carried out by bending during press working with reference to the lower part of one vertical plate member 1 as shown in Figs. 16 b) to 16 f) The upper portion is sequentially horizontally and vertically bent from the upper portion of the other side of one vertical plate member 1 toward the upper side of the upper portion so that the upper flange portion 110 and the lower flange portion 120 and the upper flange portion 110, The web 130 formed between the lower flange portions 120 and connecting the upper flange portion 110 and the lower flange portion 120 to one end of the upper flange portion 110, The one side reinforcing flange portion 141 and the other side reinforcing flange portion 141 formed between one end of the lower flange portion 120 and the other end portion of the upper flange portion 110 and the other end portion of the lower flange portion 120, The reinforcing flange portion 140 including the reinforcing flange portion 140, Thereby forming the main body 10 further.

More specifically, as shown in Figs. 16A and 16B, the upper portion of one of the above-mentioned vertical plate members 1 is referred to as one lower portion of one of the above-mentioned vertical plate members 1, It is possible to bend horizontally in the direction of the other side of the other side

16 (c), the other upper side portion 1a of one of the above-mentioned vertical plate members 1 can be vertically bent in the lower direction of one of the above-mentioned vertical plate members 1. As shown in Fig.

16 (d), the other lower side portion 1b of one of the above-mentioned vertical plate members 1 can be horizontally bent in the direction of one lower side of one of the above-mentioned vertical plate members 1. [

Then, as shown in FIG. 16 (e), the one lower side portion 1c of one of the above-mentioned vertical plate members 1 can be vertically bent in the upper direction of one of the above-mentioned vertical plate members 1. [

16 (f), the upper one side portion 1d of one of the above-mentioned vertical plate members 1 is horizontally bent in the direction toward the other side of the upper side of one of the above-mentioned vertical plate members 1, The one upper side portion d of one of the vertical plate members 1 can be welded and fixed to one side of the upper portion of the middle portion of one of the girder bodies 10. [

The method of manufacturing an example of a girder requires at least eight welding processes (see W in FIG. 13), and another example of the method of manufacturing a girder requires at least four welding processes (see W in FIG. 15) The girder body 10 can be easily formed through a single welding process (see W in FIG. 16).

The following specific details of the girder main body 10 formed by the method of manufacturing the girder of another example, another example, another example have been described above in the girder structure of the present invention, so the repetitive contents will be omitted below.

10; A girder main body 110; An upper flange portion,
120; A lower flange portion 130; Web,
140; Reinforced flange section.

Claims (20)

An upper flange portion and a lower flange portion;
A web formed between the upper flange portion and the lower flange portion and connecting the upper flange portion and the lower flange portion;
A side reinforcement flange portion formed between one end portion of the upper flange portion and one end portion of the lower flange portion and another reinforcement flange portion formed between the other end portion of the upper flange portion and the other end portion of the lower flange portion And a reinforcing flange portion for distributing a load applied to the upper flange portion to one end portion and the other end portion of the upper flange portion, respectively;
A main body having a lower portion hinged to an upper portion of an outer surface of a reinforcing flange portion of the girder main body and a magnetic force generating portion provided on an upper portion of the main body and attached to a lower portion of a laminator provided on the upper portion of the girder main body; And a girder structure.
The method according to claim 1,
And a protruding member protruding outwardly of the reinforcing flange portion is formed on the outer surface of the reinforcing flange portion so as to extend in the front-rear direction of the reinforcing flange portion.
The method according to claim 1,
And slits are formed in the reinforcing flange part at regular intervals.
The method according to claim 1,
A connecting portion for connecting the rear side of one of the girder main bodies and the front side of the other one of the girder main bodies is provided,
The connecting portion includes a vertical connecting plate having a front side fixed to one side rear side and another side rear side of one of the girder main bodies and one side front side of the other girder main body and a rear side opposite to another side front side of the other main side;
An angle at which an upper portion is fastened to a lower portion of an outer surface of the vertical connecting plate;
And a lower connecting plate having one side and the other side respectively fastened to the lower portion of the angle.
5. The method of claim 4,
Between one of the web and one reinforcing flange portion of any one of the girder main bodies and between the web and the other reinforcing flange portion of any one of the girder main bodies and between the web and one reinforcing flange portion of the other girder main body, And a reinforcing plate is formed between the web and the other reinforcing flange portion of the girder body horizontally at regular intervals in the vertical direction of the girder body.
The method according to claim 1,
And a shaft member extending in the front-rear direction of the body is formed at a front side and a rear side of the body of the magnetic force generating unit, or at a front side and a rear side of the body.
The method according to claim 1,
Wherein the girder body is formed by fixing the reinforcing flange portion to one end portion and the other end portion of the upper flange portion, the lower flange portion, and the preformed shape steel comprising the web.
The method according to claim 1,
The upper portion of one of the vertical plate members is horizontally and vertically bent sequentially from the other upper side toward the upper side of the other side of the one vertical plate member with respect to the lower portion of one vertical plate member to form the girder body Girder structure.
a) preparing an upper flange portion and a lower flange portion, a web, and a reinforcing flange portion;
b) securing a web between the upper flange portion and the lower flange portion;
and c) a reinforcement member having a reinforcing flange portion and a reinforcing flange portion on the other side, which are respectively provided between one end of the upper flange portion and one end portion of the lower flange portion and between the other end portion of the upper flange portion and the other end portion of the lower flange portion, And forming a girder body by fixing the flange portion,
A main body having a lower portion hinged to an upper portion of an outer surface of a reinforcing flange portion of the girder main body and a magnetic force generating portion provided on an upper portion of the main body and attached to a lower portion of a laminator provided on the upper portion of the girder main body; Is formed on the upper surface of the girder.
a) preparing a prefabricated steel section composed of an upper flange portion and a lower flange portion, and a web formed between the upper flange portion and the lower flange portion;
and b) forming a girder body by fixing a reinforcing flange portion, which is composed of one reinforcing flange portion and another reinforcing flange portion, on one end portion and the other end portion of the section steel,
A main body having a lower portion hinged to an upper portion of an outer surface of a reinforcing flange portion of the girder main body and a magnetic force generating portion provided on an upper portion of the main body and attached to a lower portion of a laminator provided on the upper portion of the girder main body; Is formed on the upper surface of the girder.
a) preparing one vertical plate member;
and b) vertically bending the upper portion of one vertical plate member from one upper side to the other upper side of the one vertical plate member horizontally and vertically in succession with respect to the lower portion of one vertical plate member to form an upper flange portion and a lower flange portion A web which is formed between the upper flange portion and the lower flange portion and connects the upper flange portion and the lower flange portion, and a web between one end of the upper flange portion and one end of the lower flange portion, And a reinforcing flange portion formed of one side reinforcing flange portion and another side reinforcing flange portion respectively formed between the other end of the lower flange portion and the other end portion of the lower flange portion,
A main body having a lower portion hinged to an upper portion of an outer surface of a reinforcing flange portion of the girder main body and a magnetic force generating portion provided on an upper portion of the main body and attached to a lower portion of a laminator provided on the upper portion of the girder main body; Is formed on the upper surface of the girder.
12. The method according to any one of claims 9 to 11,
And a protruding member protruding outwardly of the reinforcing flange portion is formed on the outer surface of the reinforcing flange portion so as to extend in the front-rear direction of the reinforcing flange portion.
12. The method according to any one of claims 9 to 11,
And slits are formed in the reinforcing flange part at regular intervals.
12. The method according to any one of claims 9 to 11,
A connecting portion for connecting the rear side of one of the girder main bodies and the front side of the other one of the girder main bodies is provided,
The connecting portion includes a vertical connecting plate having a front side fixed to one side rear side and another side rear side of one of the girder main bodies and one side front side of the other girder main body and a rear side opposite to another side front side of the other main side;
An angle at which an upper portion is fastened to a lower portion of an outer surface of the vertical connecting plate;
And a lower connecting plate having one side and the other side respectively fastened to the lower portion of the angle.
12. The method according to any one of claims 9 to 11,
Between one of the web and one reinforcing flange portion of any one of the girder main bodies and between the web and the other reinforcing flange portion of any one of the girder main bodies and between the web and one reinforcing flange portion of the other girder main body, Wherein a reinforcing plate is formed between the web and the other reinforcing flange portion of the girder body horizontally at regular intervals in the vertical direction of the girder body.
12. The method according to any one of claims 9 to 11,
Wherein a shaft member extending in a front-rear direction of the body is formed on a front side and a rear side of the body of the magnetic force generating unit, or on a front side and a rear side of the body. delete delete delete delete

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