JP2000045442A - Floor structure for platform construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the workability of a site work by enhancing the prefabrication degree of floor members and to enhance the working efficiency by facilitating the member management at the site work in a floor structure for a platform construction. SOLUTION: Outer circumferential joists 5, 6 for a floor structure which are constituted of two channel steels with same cross section are faced back to back with each other and their interval is set to the same as the flange width of the channel steel in the design dimension. A corner hardware 23 is provided in a corner part where the outer circumferential joists 5, 6 are joined together, the corner hardware 23 is provided with metals joined with the outer circumferential joists 5, 6 in the side face of a rectangular parallelepiped member whose height is set to same as that of the outer circumferential joists 5, 6 and width and depth are set to same as the width of the outer circumferential joists 5, 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a floor structure for a platform construction method used in a building having three floors or less, such as a house, a small office, a small store, and the like. The floor structure of the present invention is particularly suitable for a steel house platform construction method which has been widely used in recent years.

[0002]

2. Description of the Related Art The load-bearing structures of buildings such as houses mainly include a column structure and a panel structure. The panel structure is being standardized, and its application is expanding as a construction method to increase the ratio of factory production (hereinafter referred to as prefab) by standardization and reduce the overall construction cost.

A typical panel structure is a 2 × 4 construction method. In recent years, a steel house using a shape steel obtained by bending a thin plate as a frame material of a panel is becoming widespread.

[0004] In a steel house, a section steel is also used for the floor structure, and constitutes a bearing floor structure. The method of starting up the wall panels after completing the floor structure is called the platform method.

FIG. 1 is a perspective view showing a floor structure for a conventional steel house platform construction method. FIG. 1A shows a state in which an outer end joist 5 and an outer side joist 6 are constructed, and FIG.
Shows a state in which the outer floor joist receiver 7 and the outer floor joist 8 are constructed. In the drawing, reference numeral 1 denotes a foundation, 2 denotes a base, 3 denotes an anchor bolt, 4 denotes an anchor bolt for hole-down, 9 denotes a reinforcing material, 10 denotes a corner angle, 11 denotes a screwing point, 12 denotes a cutout, and 13 denotes a floor. It is a joist.

In FIG. 1, an outer end joist 5 and an outer side joist 6 to which a reinforcing material 9 is attached are placed on a base 2, and a screwing point 1 is provided.
Then, each member is fixed by screwing to 1, and then an outer floor joist receiver 7 is placed at a predetermined interval from the outer end joist 5, and screwed to a screwing point 11. A self-drilling tapping screw is used as the screw, and can be screwed without previously drilling a prepared hole.

[0007] Similarly, the outer floor joist 8 is placed on the base 2 at a prescribed interval from the outer circumferential joist 6 and is screwed into the screwing point 11. Here, the outer end joist 5,
The outer side joists 6 are provided with notches 12 in advance so as not to interfere with the hole-down anchor bolts 4.

In the figure, the distance between the outside of the outer peripheral joist 5 and the inside of the outer floor joist receiver 7 (the width constituted by both members)
Is the same as the thickness of the wall panel (not shown). Similarly, the width constituted by both members of the outer peripheral side joist 6 and the outer peripheral floor joist 8 is the same as the thickness of the wall panel.

FIG. 2 is a perspective view showing an example of dimensions of a conventional floor structural member on the first floor. FIG. 2 (a) shows an outer peripheral joist 5 and an outer joist receiver 7, and FIG. And the outer floor joist 8 are shown. In this figure and the following figures, the same parts as those in FIG. In FIG. 3A, the design dimensions of the outer peripheral joist 5 and the outer floor joist receiver 7 are determined as shown, and the flange width of each member is different. Same figure
The same applies to the dimensions of the outer peripheral joists 6 and the outer floor joists 8 in (b).

[0010] Fig. 3 is a perspective view showing the floor structure and dimensions of the first floor of a conventional steel house. Fig. 3 (a) shows an internal floor joist receiver 14, and Fig. 3 (b) shows an internal side joist 15. Show. As shown in the figure, the inner floor joist receiver 14 and the inner side joist 15 are respectively screwed on the base 2 with their backs facing each other. Have the same flange width, and the interval is the same as the flange width.
The same applies to the two internal joists 15 shown in FIG.

When the construction of the members at the outer periphery (members 5 to 8 in FIG. 1) is completed, as shown in FIG. 1 (b), the end of the floor joist 13 supporting the floor material at each part is received by the floor joist receiver 7. 2 and the other end is inserted into the recess of the internal floor joist receiver 14 in FIG. 2 to complete the joist work. After that, the first floor is completed with the floor boards. As shown in FIG. 1, a channel steel obtained by bending a thin plate is used for the outer end joist 5 and the outer floor joist receiver 7, and the outer side joist 6, the outer floor joist and the floor joist 13 are made of the channel steel. Channel steel with lip with excellent rigidity is used.

Similarly, a joist structure on the second floor of a building is formed by combining shaped steel members.

FIG. 4 is a perspective view showing a conventional joist structure of the second floor and an example of dimensions. FIG. 4 (a) is a second floor outer peripheral end joist 16 and a second floor outer floor joist receiver 18, and FIG. The outer floor joists 17 on the outer floor of the floor and the outer floor joists 19 on the second floor are shown.
FIG. 3D shows the inner joist 21 on the second floor.

[0014] As shown in FIG.
In the outer floor joist receiver 18 on the sixth and second floors, as in the case of the outer floor joists on the first floor, the two channel steels have their back faces outward, the flange widths are equal, and the two members are in contact with no space. The same applies to the outer floor joists 17 on the second floor and the outer floor joists 19 on the second floor in FIG.

As shown in FIG. 1 (c), the two inner floor joist supports 20 on the second floor face the back, have the same flange width, and the interval between them is the same as the flange width. Same figure
The same applies to the two inner joists 21 on the second floor in (d).

The outer peripheral joist 5, outer peripheral joist 6, outer floor joist receiver 7, and outer floor joist 8 for the first floor are collectively referred to as the first floor outer joist. The floor outer circumference joists 17, the second floor outer floor joists 18 and the second floor outer floor joists 19 are collectively referred to as a second floor outer joist. The first floor outer joists and the second floor outer joists are collectively referred to as outer joists.

The internal floor joists 14 and 15 for the first floor are collectively referred to as a first floor internal joist, and the internal floor joists 20 and 21 for the second floor are collectively referred to as the first floor internal joists. The second floor internal joists are called the first floor internal joists and the second floor internal joists.

In FIG. 4, the members 16 to 19 are screwed to the upper frame of the wall panel (not shown) rising from the first floor at the screwing points 11.

As shown in FIGS. 1A and 1C, the second floor joist 23 is attached to the outer floor joist receiver 18 on the second floor or the internal floor joist receiver 20 on the second floor via the corner hardware 23.

The usage of the channel steel and the channel steel with lip in the second floor structure is the same as the usage of the first floor.

FIG. 2 (a) and (b) or FIG. 4 (a) and
As shown in (b), the back of the outer peripheral joist 5, the outer peripheral joist 6, the second-floor outer joist 16 and the second-floor outer joist 17 is turned to the outside of the building. This is to secure a surface for fastening.

The conventional steel house floor structure has the following problems (1) to (3) in terms of construction efficiency.

(1) In FIG. 1, notches 12 must be provided in the outer end joists 5 and the outer side joists 6 in order to avoid the hole down anchor bolts 4. A hole 2 anchor bolt 4 is embedded in the foundation 2 when concrete is cast. However, the accuracy of the mounting position is not sufficient, and unless the notch 12 is processed at the site or the notch which is prefabricated is corrected. May not be
On-site man-hours will increase.

(2) As shown in FIG. 1 (a), the outer floor joists 5 or 6 are attached first, and then the outer floor joists are mounted as shown in FIG. 1 (b). Attach the receiver 7 or the outer floor joist 8. Since the opening direction of the channel steel of the outer peripheral joist 5 or the outer peripheral joist 6 is closed by the outer floor joist receiver 7 or the outer floor joist 8, it is necessary to always follow this order.

For this reason, even though the reinforcing member 9 and the like can be attached to the outer peripheral joist 5 or the outer peripheral joist 6 by prefabrication, the outer peripheral joist 5 and the outer floor joist receiver 7 are integrated by prefabrication, and the Work cannot be simplified. Perimeter side joist 6 and perimeter floor joist 8, 2nd floor perimeter end joist 1
6th and 2nd floor outer floor joists receiver 18, 2nd floor outer circumference joists 17 and 2
The same applies to the combination of the floor outer floor joists 19.

On the other hand, FIG. 3 (a) and FIG.
In the case of a pair of internal floor joists 14, internal floor joists 15, a pair of second floor internal floor joists 20 and a second floor internal joists 21 shown in FIGS. Is possible.

(3) FIG. 5 is a schematic view showing an outline of the floor structure of the first floor according to the prior art. The figure schematically shows a floor structure in which the space between the pillar centers indicated by ● is equal and there is no floor partly in the shape of a square “field”. Each member of the outer floor joist on the first floor shows a case where the flange width dimensions shown in FIGS.

In the figure, the outer end joists 5-1 to 5-3 are shown.
Have the same dimensions, but different lengths.

The outer joists 6-1 and 6-1 to 6-4 differ in the type of the material steel. Outer side joist 6-2-6-
The material sections of No. 4 have the same dimensions, but different lengths.

The material steel bars of the outer joist supports 7-1 to 7-3 have the same dimensions but different lengths. Further, the outer joist supports 7-1 to 7-3 are different from the inner joist receiver 14 in the type of the shape steel.

The material steels of the outer floor joists 8-1 to 8-2 have the same dimensions but different lengths. Further, the outer floor joists 8-1 to 8-2 are different in the type of the shape steel from the floor joists 13-1 to 13-2.

The material steel bars of the floor joists 13-1 to 13-2 have the same dimensions but different lengths.

As described above, in the conventional method, there are many types of shaped steel, and even if the distance between the same column centers (or wall centers) is the same, the outer end joist 5, the outer side joist 6, and the outer floor joist are used. Receiving 7, outer floor joist 8, floor joist 13, inner floor joist receiving 14,
Each of the inner side joists 15 has a slightly different length when intersecting with the end joist or when intersecting with the inner joist.

This means that when prefabricating a channel steel, even the type of length alone will reduce the number of types and the number of products, and the burden on various management aspects such as manufacturing control, quality control and inventory control will increase. In the field work, there are many kinds of members having similar dimensions, and it is easy to cause erroneous mounting and confusion of the work.

[0035]

SUMMARY OF THE INVENTION An object of the present invention is to increase the prefabrication of a floor member in a floor structure for a platform method, thereby improving workability in on-site construction, and reducing the number of types of floor members. In addition to facilitating production management in a factory, it is also to facilitate management of members in on-site construction.

[0036]

Means for Solving the Problems The present inventors have sorted out the problems of the conventional steel house floor structure construction method and obtained an idea of improvement as follows.

(A) In FIG. 1, the necessity of providing the notch 12 for avoiding the anchor bolt 4 for hole down in the outer peripheral joist 5 and the outer peripheral joist 6 in FIG. This is due to the large design dimensions of the steel flange width. That is, as shown in FIGS. 2 (a) and (b),
The flange width of the outer peripheral joist 5 and the outer peripheral joist 6 is half of the entire width of the pair of outer joists (in the example of FIG. 2, the outer width of the pair of outer joists is 90 mm; Since the outer joist 6 has a flange width of 45 mm, the notch 12 must be provided. If the distance between the outer end joist 5 and the outer floor joist receiver 7 is increased and aligned with the center position, the notch 12
Is no longer necessary. In consideration of the commonality of the dimensions of the channel steel members, the flange width and interval of the channel steel may be made equal in the design dimensions. That is, as in the example of FIG. 2, if the outer width of the outer joist is 90 mm, the flange width is preferably set to 30 mm.

(B) As shown in FIGS. 1 (a) and 1 (b), after the outer end joist 5 is installed, the outer floor joist receiver 7 is installed in two steps. If the direction of the end joist 5 is reversed and the back surface of the channel steel is made to face, there is no restriction on the construction order of the outer end joist 5 and the outer floor joist receiver 7. With this change, the outer end joist 5 and the outer floor joist receiver 7 can be prefabricated.

However, in this case, the outer end joist 5
In addition, the back surface of the outer joist 6 is on the inside, and the mounting surface of the outer wall and the decorative wall cannot be secured. In order to cope with this, it is only necessary to secure the mounting surface by putting the reinforcing material 9 at a key point outside the outer peripheral joist 5 and the outer peripheral joist 6.
These reinforcing members 9 are the outer end joist 5 and the outer floor joist receiver 7.
Or, the outer joist 6 and the outer floor joist 8 can be prefabricated, and the on-site work efficiency does not decrease.

Outer peripheral joist 6 and outer floor joist 8, second floor outer peripheral joist 16 and second floor outer floor joist receiver 18, second floor outer joist 1
Similar improvements can be made to the 7th and 2nd floor outer floor joists 19.

(C) Even if the column center dimensions and the wall center dimensions are the same,
Regarding the problem that the length is slightly different between the outer floor joist 8, the floor joist 13 and the inner side joist 15, the flange width of the outer floor joist receiver 7 and the inner floor joist receiver 14 is unified by the improvement of the above (a). By doing so, the length can be unified.

The types of lengths of the outer end joists 5 and the outer floor joists 7 and the outer side joists 6 and the outer floor joists 8 are reduced by cutting the lengths at the corners.

The lengths of the pair of internal floor joists 14 and the pair of internal side joists 15 are reduced by trimming the lengths at the corners.

As a result, a blank is formed in the outer peripheral corner portion, but it is sufficient to apply a corner metal to this portion.

The present invention has been made based on the above findings, and the gist thereof is as follows (1) and (2).

(1) The outer joist of the floor structure is composed of two channel steels having the same cross section, and the two channel steels face each other at an interval, and the interval is a groove having a design dimension. A floor structure for a platform method characterized by having the same width as a flange width of a section steel.

(2) A floor structure having a corner metal at a portion where the outer joist and the inner joist of the floor structure meet in an arbitrary combination, wherein the corner metal has a design dimension and a height of the outer joist or the inner joist. A rectangular parallelepiped member having a height equal to the joist and having a width and a depth three times as large as the flange width of the channel steel of the outer or inner joist; and a member to be joined to the outer and inner joists on the side surface of the rectangular member. A floor structure for a platform construction method, comprising:

Here, the design dimension refers to a reference dimension assuming that the thickness of the section steel material, a gap for fitting, and a manufacturing error are zero.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 6 is a perspective view showing an outline of a corner portion of a first floor outer floor joist in a first floor structure of the present invention. In the figure, each member (outer peripheral end joist 5, outer peripheral joist receiver 7, outer peripheral joist 6, and outer peripheral joist 8) of the first floor outer peripheral joist is brought into contact with the side surface of the corner fitting 23 at the corner portion. I have.

In the same figure, the flange width and the web height of the outer peripheral joist 5, the outer floor joist receiver 7, the outer peripheral joist 6, and the outer peripheral joist 8 are the same in design dimensions. The outer end joist 5 and the outer floor joist receiver 7 are installed with the back side of the channel steel facing each other. Similarly, the outer peripheral joists 6 and the outer floor joists 8 face the back.

As shown in FIG. 6, the outer peripheral joist 5 and the outer floor joist receiver 7 or the outer peripheral joist 6 and the outer peripheral joist 8 are opposed to each other on the back side, so that the outer peripheral joist 5 or The restriction condition that the outer peripheral joist 6 must be attached first and the outer floor joist receiver 7 or the outer floor joist 8 must be applied in order later is eliminated.

The distance between the outer peripheral joist 5 and the outer floor joist receiver 7 and the distance between the outer peripheral joist 6 and the outer floor joist 8 are the same as the flange width in design dimensions. Since the distance between the outer end joist 5 and the outer floor joist receiver 7 is equal to the width of the flange, the hole-down anchor bolt 4 can be easily passed through, and the notch 12 is machined as in the conventional method. It is not necessary (see FIG. 1).

In FIG. 6, the width of the side surface of the corner metal piece 23 is also three times the flange width, and the horizontal cross section is square.

As shown in FIG. 6, the end portions at the corners of the outer peripheral joist 5 and the outer floor joist receiver 7 are cut and aligned on the same plane. In the corner portion of FIG. 1 (b), the outer end joist 5 and the end of the outer floor joist receiver 7 extend to the web surface of the outer side joist 6 and the outer floor joist 8, respectively. Not on the same plane. Therefore, when the outer peripheral joist 5 and the outer floor joist receiver 7 are viewed only at the corners, they can be made of the same channel having the same length, and if the other ends meet at the corner, they should be the same parts. And the number of parts can be reduced.

FIG. 7 is a schematic view showing an example of a member in which the outer end joist 5, the outer floor joist receiver 7 and the reinforcing material of the present invention are combined, and FIG. 7 (a) shows the reinforcing material 9-1 of the channel steel. , A hat-shaped reinforcing member 9-2, and FIG.
-3 and 9-4.

The reinforcing members 9-1 to 9-1 shown in FIGS.
9-4 is not an essential requirement of the present invention, but the reinforcing members 9-1 to 9-1
It is desirable that 9-4 be integrated with the outer peripheral joist 5 and the outer floor joist receiver 7 in the prefabrication stage, since assembly on site is eliminated and workability is improved. Further, as described above, prefabrication is possible only by facing the outer end joist 5 and the outer floor joist receiver 7 to face each other.

The advantage that the distance between the outer end joist 5 and the outer floor joist receiver 7 is the same as the flange width is that other channel steel having the same dimensions can be easily joined by inserting the groove into this distance. In addition, the number of channel steel members can be reduced.

FIG. 8 is a perspective view showing an example of the structure of a corner metal piece according to the present invention. FIG.
(b) is a block diagram of corner metal parts.

As shown in FIG.
Is composed of a rectangular parallelepiped member 23-1 and a joining member 24. The horizontal cross section of the rectangular parallelepiped member 23-1 is a square having a design dimension of three times the flange width of the channel joist of the outer joist, and the height is the same as the height of the outer joist, that is, the web dimension of the channel steel. is there. Since the height of the outer joist and the inner joist are usually the same, the height of the rectangular parallelepiped member 23-1 is the same as the height of the inner joist.

The width of the protruding portion of the joining member 24 corresponds to the interval between the two outer joists, and is the same as the flange width of the channel steel forming the outer joists.

FIG. 6B shows an example in which the corner metal 23 is formed of a shaped steel part. The rectangular parallelepiped member 23-1 is a grooved steel 23-2 with a lip for a corner metal and a grooved steel 23-2 for a corner metal. -3, and the joining member 24 is constituted by a hat-shaped hardware 24-1.
The configuration example of the part shown in FIG. 3B is not limited to this, and the type of the shape steel of the component is not limited as long as the design dimensions of the rectangular parallelepiped are as described above. Further, the rectangular parallelepiped member 23-1 is not limited to the shape steel, but may be any wooden material or any other screwable material.

The shape of the joining member 24 is not limited to the example of the hat-shaped metal member 24-1 shown in FIG. 3B, and the outer joist member is assembled with a screw having a dimension maintaining the same width as the flange width. Any material may be used, such as a combination of L-shaped steel or a wooden block.

FIG. 9 is a schematic view of a horizontal section showing various aspects of the corner metal fitting of the present invention. FIG.
(b) is the corner of the wall, (c) is the joint of the wall, (d)
3 shows a case of a three-way partition intersection, and FIG. 4E shows a case of a four-way partition intersection. 8, the same components as those in FIG. 8 are denoted by the same reference numerals. As shown in the figure, the corner hardware is placed at the corner where the outer and inner joists meet in any combination.

FIG. 10 is a plan view showing an outline of a floor structure to which the present invention is applied. This figure shows the same arrangement as the floor of FIG. The corner hardware 23a to 23e in FIG.
This corresponds to the embodiments (a) to (e). In the same figure, each of the outer end joist 5, the outer floor joist receiver 7, and the inner floor joist receiver 14 are made of shaped steel having the same dimensions, and their lengths are equal. In addition, the outer side joist 6, the outer floor joist 8, the inner side joist 1
Each of 5 and floor joist 13 is made of a section steel of the same size, and their lengths are equal.

When FIG. 10 is compared with FIG. 5, it can be seen that the number of types of shaped steel has been reduced and the types of lengths have been significantly reduced. The same can be applied to the second floor structure.

In the present invention, the number of parts is increased due to the use of corner metal parts as compared with the prior art. However, the types of shaped steel and the length of each member are greatly reduced, and the parts management is remarkably reduced. Simplified. Further, although the number of types of corner hardware increases as shown in FIG. 9, the appearance of each is obvious, and there is no confusion of parts as compared with the case where the lengths of the shape steels are slightly different as in the prior art.

[0067]

When comparing the number of parts between the floor structure according to the prior art and the floor structure according to the present invention, the conventional technology has a total of 1312 types on the first and second floors. It was reduced to 1/4.

When the conventional art and the present invention were compared in terms of the work time for assembling the floor structure,
For a two-storey house with about 40 tsubo, the average time was reduced from 9.5 hours to 3.1 hours (four-person work, without using a crane). The work time of the prior art includes a work of reworking a part of the notch 12 (see FIG. 1), and also includes a length error of each member and a time for checking the length. In addition, the method of the present invention was able to reduce the number of temporary storage locations for parts at a construction site as compared with the conventional method.

[0069]

According to the present invention, the degree of prefabrication of the members of the floor structure of the steel house can be increased, the types of parts can be greatly reduced, and the number of errors in the parts is small, so that the work efficiency is greatly improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of a floor portion of a conventional steel house. FIG. 1 (a) shows a state in which an outer end joist 5 and an outer side joist 6 are constructed, and FIG. 1 (b) shows an outer floor joist support. 7 shows a state in which the outer floor joists 8 and 7 are constructed.

FIGS. 2A and 2B are perspective views showing examples of dimensions of a floor structural member of a conventional first floor portion, wherein FIG. 2A shows an outer peripheral joist 5 and an outer joist receiver 7, and FIG. The floor joist 8 is shown.

FIG. 3 is a perspective view showing an example of a floor structure and dimensions inside the first floor of a conventional steel house. FIG.
4. FIG. 4B shows the inner joist 15.

FIG. 4 is a perspective view showing a conventional joist structure of the second floor and an example of dimensions. FIG. 4 (a) is a second-floor outer edge joist 16 and a second-floor outer joist support 18, and FIG. The side joist 17 and the outer floor joist 19 on the second floor, the same figure (c) is the inner floor joist receiver 20 on the second floor, and the same figure (d)
Indicates a joist 21 inside the second floor.

FIG. 5 is a schematic view showing an outline of a conventional floor structure on the first floor.

FIG. 6 is a perspective view showing an outline of a corner portion of a first floor outer floor joist in the first floor structure of the present invention.

FIG. 7 is a schematic view showing an example of a member in which an outer end joist 5, an outer floor joist receiver 7, and a reinforcing material of the present invention are combined.
(a) shows a channel steel reinforcing material 9-1 and a hat-shaped reinforcing material 9-.
2. The same figure (b) shows hat-shaped reinforcing members 9-3 and 9- of the same shape.
4 is used.

8 is a perspective view showing an example of the structure of the corner metal according to the present invention, wherein FIG. 8 (a) is an assembled state and FIG. 8 (b) is a configuration diagram of a corner metal part.

FIG. 9 is a schematic view of a horizontal section showing various aspects of the corner metal fitting of the present invention, wherein FIG. 9 (a) is a wall end, FIG. 9 (b) is a wall corner, and FIG. 5 (d) shows the case of a three-way partition intersection, and FIG. 6 (e) shows the case of a four-way partition intersection.

FIG. 10 is a plan view showing an outline of a floor structure to which the present invention is applied.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Foundation 2 Base 3 Anchor bolt 4 Anchor bolt for hole down 5, 5-1-5-3 Outer end joist 6, 6-1-6-4 Outer side joist 7, 7-1-7-3 Outer floor joist receiver 8, 8-1 to 8-2 Outer floor joist 9 Reinforcement material 10 Corner angle 11 Screwed point 12 Notch 13, 13-1 to 13-2 Floor joist 14 Internal floor joist receiver 15, 15-1 to 15-2 Inner side joist 16 2nd floor outer end joist 17 2nd floor outer side joist 18 2nd floor outer floor joist receiver 19 2nd floor outer floor joist 20 2nd floor internal floor joist receiver 21 2nd floor inner side joist 22 2nd floor floor joist 23, 23a, 23b, 23c, 23d, 23e Corner hardware 23-1 Rectangular member 23-2 Channel steel with lip for corner hardware 23-3 Channel steel for corner hardware 24 Joint member 24-1 Hat-shaped hardware

Claims (2)

[Claims] 1. An outer floor joist of a floor structure is composed of two channel steels having the same cross-section, said two channel steels facing each other at an interval, and said interval is a channel having a design dimension. A floor structure for a platform method characterized by having the same width as a steel flange width. 2. A floor structure having a corner metal at a portion where an outer joist and an inner joist of the floor structure meet in an arbitrary combination, wherein the corner metal has a design dimension and a height of the outer joist or the inner joist. And the width and depth are 3 times the flange width of the channel steel of the outer or inner joist.
A floor structure for a platform method, comprising: a rectangular parallelepiped member that is doubled; and a member that is joined to an outer joist and / or an internal joist on a side surface of the rectangular solid member.