JPS6272848A - Beam structure in steel bar construction - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a beam structure in a steel frame building with a pitched roof.

(Problems to be Solved by the Invention) Beams in steel frame framework construction must withstand bending mainly in the vertical direction, and in terms of mutual connection with columns and beams, beams have H
Shaped steel or assembled beams with a similar cross-sectional shape are used. However, although a beam with this shape has a high cross-sectional performance against vertical forces, its cross-sectional performance against horizontal forces is extremely low, so it is impossible to make the span too large due to the need to prevent lateral buckling, twisting, etc.゛The large beams and small beams must be placed at appropriate intervals. Also, since the rigidity is small, horizontal places are inserted in appropriate places. Due to these circumstances, conventional steel structures made mainly of H-beams have not been able to effectively utilize attic space in buildings with pitched roofs.

This invention was made with the aim of eliminating the structural limitations of conventional steel structures and making effective use of the space in the attic. This is what we are trying to achieve.

(Means for Solving the Problems) The present invention solves the above problem by constructing at least a part of the girders forming the roof frame from square steel pipes, thereby increasing the span of the beams.

Rectangular steel pipes have no extreme difference in cross-sectional performance against vertical force and cross-sectional performance against horizontal force, have little risk of twisting or buckling, and have high rigidity, making it possible to take large spans.

Therefore, it is possible to reduce the number of small beams that are installed at appropriate intervals between the conventional large beams made of H-beams, etc., and horizontal places are no longer necessary.

Square steel pipes are used for at least one set of opposed girders to increase the span.

(Example) The present invention will be described below with reference to drawings showing one embodiment.

In this invention, as shown in FIGS. 1 and 2, at least one pair of opposing girders 1, 1 forming a roof frame A are constructed using square steel pipes a. The square steel pipe a may be used for a part of the opposing girder 1.1 as shown in FIG. For the reason mentioned above, there is no need to erect the ten-button 2 between the large beams 1 and 1 made of square steel pipes a, and the small beams 2 do not use the square steel pipes a, as shown in Figure 2, where they are needed. Just add this. As a result, the surface of the square steel pipe a surrounded by the large beams 1 and 11 is wide open, and the attic space above can be made continuous with the room space.

In the illustrated embodiment, the square steel pipe a is
(It is formed by assembling channel steel for convenience of connection with the pillar 3 and the small beam 2.)

As shown in Fig. 6, port holes 3a are provided at appropriate intervals in the vertical and horizontal parts of the square steel pipe a for connection with the pillars 3 and small beams 2.
, 2a are provided, and a backing 4 for port screw engagement is further bonded to the inside thereof. This backing 4 is a square steel pipe a
The web and flange of the channel steel are joined together before forming.

FIG. 4 shows an example of the joint between the girder 1 and the column 6 of the square steel pipe a. In this embodiment, the girder side girder 1 (this square steel pipe a is used, and the girder 1 is connected to the pillar 3 of the square steel pipe a via an angle piece 5, joining hardware 6, etc., and the girder 1 is made of H-beam steel. is also connected to the pillar 2 in the same way.

The room surrounded by the large beams 1, 1 made of square steel pipes a is continuous with the attic space, creating an open space, and since no horizontal space is required, the attic space can be used as a storage space.

(Effects of the invention) In this invention, by using square steel pipes for the main beams, the number of small beams is unnecessary or reduced (there is no need to insert horizontal places, so the space in the attic can be used relatively freely) .

In addition, since the ceiling height can be increased, the indoor environment such as lighting and ventilation can be improved.

[Brief explanation of drawings]

1 and 2 are perspective views showing an outline of the present invention,
Figure 3 shows a girder made of square steel pipes, ■ is a front view,
■ is a bottom view;
1 is a cross-sectional view, and 1 is an end view taken along the line X-X. A: Roof frame, 1: Large beam, a: Square steel pipe, 2: Small beam, 6:
Pillar, 2a, 3a: Port hole, 4: Back cover, 5: Angle piece, 6: Joining hardware.

Claims (1)

[Claims] (1) A beam structure in a steel frame structure, characterized in that at least one set of opposing girders forming a roof frame is made of square steel pipes.