JP2002138626A - Beam member for building structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a low-cost beam member enabling the shortening of a construction period by dispensing with both a reinforcing material and a joining member taken as another member. SOLUTION: The beam member is characterized as follows: the edge of the upper flange 1d of an end joist 1 composed of Z section steel made of a thin steel plate is folded at right angles, so as to have a lip 1a formed; a U-shaped cut 3 made into a web 1b is folded at right angles, in order to constitute a cut-and-raised joining piece 4; the lip 1a is engaged with the upper part of a downstairs wall frame 2 and put into a suspended state; and the upper flange 1d is sandwiched for use between an upstairs wall frame 7 and the wall frame 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a beam for a building structure mainly used for a steel house or the like.

[0002]

2. Description of the Related Art As a prior art example 1, as shown in FIG. 6, the upper and lower floors using thin steel sheet C-shaped steel for each frame of a steel house have an upper floor and a lower floor. It is necessary to reinforce the end joist 10 made of C-shaped steel by inserting another reinforcing material so as not to be deformed.

[0003] That is, in FIG.
5, the lower story wall frame 12 is disposed with the opening of the C-shaped steel facing downward, and the lower joist 10 of the upper floor is arranged on the lower story wall frame 12 with the opening of the C-shaped steel oriented horizontally. The floor joists 13 on the upper floor are arranged at right angles to the end joists 10 at the same level.
The floor 19 on the upper floor is installed on the floor joist 13. On the upper surface of the floor 19, the upper floor wall frame 11 is installed with the opening of the C-section steel facing upward, and the upper floor column members 15a are erected from the upper floor wall frame 11.

In FIG. 6, an end joist 10 having a C-shaped steel opening in a horizontal direction is sandwiched between an upper floor wall frame 11 and a lower floor wall frame 12 also made of C-shaped steel. In such a case, it is necessary to reinforce the end joist 10 by inserting another reinforcing material or the like so that the end joist 10 is not buckled by the compressive load received from the upper floor.

Further, in order to join the end joist 10 and the floor joist 13, a joint metal 14 such as an angle material shown in FIG. 6 is used, but this joint metal 14 functions only for joining, and It does not serve as a reinforcement.

As a conventional example 2, as shown in FIG.
At the place where the column member 15 is located, instead of the angle-shaped joint hardware 14 dedicated to the joint shown in FIG. 6, a channel steel with a lip is cut, and a joint hardware 16 used vertically is joined to the end joist 10 and the floor joist 13. , And the metal joint 16 is sandwiched between the floor joist 10 on the lower floor and the floor joist 13 on the upper floor, and is joined to the joist 10 by the fastener 17, thereby also reinforcing the joist 10. There is also.

[0007]

As described above, when a C-shaped steel sheet made of a thin steel plate is used as each frame of a building such as a steel house, in order to join the end joist 10 and the floor joist 13, Separate joining hardware and reinforcements are required. For this reason, in the case of the joint hardware 14 dedicated to joining, a reinforcing material is separately required, and the joining hardware 16 that also serves as the reinforcing material is required.
In the case of (1), there is a problem that a certain strength is required and the structure becomes complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a beam member which does not require a reinforcing material and does not require a joining member which is a separate member, and can reduce the construction period at low cost. I do.

[0009]

In order to solve the above-mentioned problems, the present invention is configured as follows.

A first aspect of the present invention is a thin-steel Z-section steel beam used for end joists and floor joists of a building structure, the edge of the upper flange of which is bent at a right angle to form a lip. And a cut-and-raised joint that forms a substantially right angle to the web via a U-shaped cut portion formed in the web, and the beam material connects the lip to an upper portion of a wall member or a base. It is characterized in that it is suspended by engaging with a support portion such as the upper part of the device.

According to a second aspect, in the first aspect, when the beam is suspended by engaging a lip with an upper portion of the wall member, an upper flange of the beam is attached to the wall member. It is characterized by being sandwiched between a member and an upper wall member.

A third invention is characterized in that, in the first invention, the beam member is suspended by engaging a lip with an upper portion of a base portion.

According to a fourth aspect of the present invention, in the second or third aspect, the cut-and-raised joint portion of the beam member is connected to a web of another beam member such as a floor joist placed on a lower flange of the beam member. It is characterized by being overlapped and joined.

[0014]

According to the present invention, a beam made of a Z-section steel is disposed with its upper flange sandwiched between upper and lower members of a wall or suspended from an upper portion of a foundation. The web of the beam material does not buckle and deform under a compressive load, and there is no need to reinforce with a reinforcing member.

Also, since the beam and the other beam such as a floor joist orthogonal to the beam are joined through a cut-and-raised joint formed integrally with the web of the beam,
It is not necessary to dispose a joining metal member as a separate member as in the related art, and positioning with another beam member via the cut-and-raised joint portion is easy. The holes formed in the web by forming the cut-and-raised joints can also be used as wiring holes.

Further, since another beam member such as a floor joist orthogonal to the beam member can be temporarily placed on the lower flange formed on the beam member, the joining operation of the beam members is easy, safe, and low in cost. The construction period can be shortened.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] An embodiment of the present invention will be described with reference to FIGS.

1 to 4 show a first embodiment, and FIG.
FIG. 3 is a perspective view showing an assembled state when the beam member made of the Z-section steel of the present embodiment is applied to upper and lower floors, that is, to an end joist of an upper floor. FIG. 2 is an exploded perspective view showing a state before assembling each component of FIG. 3 (a) and 3 (b) are explanatory views of a main part, and FIG. 4 is a sectional view taken along the line AA of FIG. 3 (b).

As shown in FIGS. 1 and 2, a lower frame wall (wall member) 2 made of a channel steel having an opening facing downward is attached to the upper end of a column 20 made of a channel steel. An end joist (beam material) 1 is attached to a wall frame 2 of the lower floor wall. The end joist 1 is formed by bending a thin steel plate by roll forming or the like, and bending an upper flange 1d with a lip 1a at the upper and lower ends of a web 1b and a lower flange 1c without a lip in opposite directions. Since the shape is similar to a Z-shape, this is referred to as a Z-shaped steel), the lip 1a is suspended by engaging the upper back of the wall frame (wall member) 2 of the lower floor wall, and the space between the two members is reduced. It is fixed with a fastener 6 such as a drill screw, screw, or bolt.

The end joist 1 and the wall frame 2 of the lower floor are shown in FIG.
(A), (b) and FIG. 4 show an enlarged perspective view and an enlarged sectional view. As shown in each figure, a U-shaped cut 3 is formed in the web 1b of the end joist 1 (Z-section steel) at predetermined intervals in the longitudinal direction, and each cut 3 is formed by a bending line 3a. Is bent at a right angle to the surface of the web 1b through
A cut-and-raised joint piece 4 integral with the web 1b is formed. Since the cuts 3 are predetermined at predetermined intervals at the time of design, the cut-and-raised joint pieces 4 will be described later.
By attaching the floor joist 5 to the floor, the positioning of the floor joist 5 is automatically performed.

As shown in FIGS. 1 and 2, on the lower flange 1c of the end joist 1, the end of each floor joist 5 made of channel steel on the upper floor is placed. The back face of the web 5a and the cut-and-raised joint piece 4 are overlapped, and the two members are joined by the fastener 6, so that the floor joist 5 is joined to the end joist 1 via the cut-and-raised joint piece 4. Therefore, the positioning of each floor joist 5 with respect to the end joist 1 via the joining piece 4 is reliable and easy, and furthermore, a conventional joint metal member of another member is provided at the joint between the end joist 1 and the floor joist 5. You don't have to.

Furthermore, when joining the floor joists 5 to the end joists 1, the floor joists 5 can be joined simply by temporarily placing them on the lower flange 1c of the end joists 1 and cutting and raising them together with the joining pieces 4. Easy to do and safe.

On the other hand, on the upper flange 1d of the end joist 1,
An upper floor frame (wall member) 7 made of a channel steel is arranged and fixed by a fastener 6. Thus, only the upper flange 1d of the end joist 1 is sandwiched between the wall frames 2 and 7 on the upper floor and the lower floor, and therefore, the reinforcing material of the end joist 1 is not required.

This Z-section steel can be applied to floor sets, ceiling sets, etc., and can also be assembled into panels at building sites.

The hole 8 formed in the cut-and-raised joint piece 4 of the web 1b, which is the joint, can also be used as a hole for electric wiring.

[Second Embodiment] A second embodiment of the present invention will be described with reference to FIG. FIG. 5 shows an example in which the present invention is applied to a concrete foundation of a building.

In the second embodiment, as shown in FIG. 5, a Z-shaped beam (beam material) 1 made of a thin steel plate is
It is disposed in a suspended state with the lip 1a engaged thereon. As in the first embodiment, the web 1b of the Z-shaped beam 1 is provided with a notch 3 and a cut-and-raised joint piece 4 bent through a bending line 3a, and a floor joist 5 is joined. The wall frame 7 is arranged on 1d.

By using the Z-shaped beam 1 as in the present embodiment, even if the shape of the concave portion is poor on the side surface of the cloth
It is possible to cope with the shape beam 1.

Further, since the Z-shaped beam 1 is engaged, it can be applied to all structures such as a conventional wooden structure, a 2 × 4 construction method, a concrete structure, a steel frame structure, and a masonry structure. is there.

[0030]

According to the present invention, the beam made of Z-section steel is disposed with its upper flange sandwiched between the upper and lower members of the wall or suspended above the foundation. The web of the beam material does not buckle and deform due to a compressive load received from it, and there is no need to reinforce it with a reinforcing member.

Also, the connection of the beam and another beam such as a floor joist orthogonal to the beam is performed through a cut-and-raised joint portion which is integrally formed on the web of the beam. Further, it is not necessary to dispose a separate joint metal member as in the related art, and positioning with another beam member via the cut-and-raised joint portion is easy. The holes formed in the web by forming the cut-and-raised joints can also be used as wiring holes. Furthermore, since another beam material such as a floor joist orthogonal to the beam material can be temporarily placed on the lower flange formed on the beam material, the joining operation of the beam materials is easy, safe, low cost, and the construction period is shortened. I can do it.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an assembled state when a Z-section steel according to a first embodiment of the present invention is applied to a beam.

FIG. 2 is a perspective view showing a state before assembling of each component in the first embodiment.

FIGS. 3A and 3B are explanatory diagrams of a main part of the first embodiment.

FIG. 4 is a sectional view taken along line AA of FIG. 3 (b).

FIG. 5 is a perspective view showing an assembled state when the Z-section steel according to the second embodiment of the present invention is applied to a beam.

FIG. 6 is a perspective view of a first conventional example.

FIG. 7 is a perspective view of a second conventional example.

[Explanation of symbols]

 Reference Signs List 1 end joist, Z-shaped beam (beam material) 1a lip 1b web 1c lower flange 1d upper flange 2 wall frame (wall member) 3 cut 3a bending line 4 cut-and-raised joint piece 5 floor joist 6 fastener 7 wall frame (wall member) 8 holes 9 foundation concrete

Claims (4)

[Claims] 1. A beam member made of a thin steel plate made of a Z-section steel used for end joists, floor joists and the like of a building structure, wherein an edge of an upper flange of the beam member is bent at a right angle to form a lip. , Through a U-shaped notch formed in the web,
A cut-and-raised joint portion that forms a substantially right angle with respect to the web is formed, and the beam material is suspended by engaging the lip with a support portion such as an upper portion of a wall member or an upper portion of a foundation. Characteristic beams for building structures. 2. When the beam is suspended by engaging a lip with an upper portion of the wall member, an upper flange of the beam is sandwiched between the wall member and the upper wall member. The beam for a building structure according to claim 1, wherein the beam is used. 3. The beam according to claim 1, wherein the beam is suspended by engaging a lip with an upper portion of a foundation. 4. The cut-and-raised joint portion of the beam material is overlapped and joined with a web of another beam material such as a floor joist placed on a lower flange of the beam material. 2
Or the beam for building structure according to 3.