JPS5845376Y2 - lattice beam - Google Patents

Description

[Detailed explanation of the idea] This idea is related to lattice beams.

Traditionally, the first and second floors have been built using a framework construction method that mainly uses columns and beams.
When building floor wall panels on lattice beams, as shown in Figure 1, a base metal fitting 1 for mounting on an exterior wall with a chevron-shaped brim made of lightweight steel is bolted to the top surface of the lattice beam 2. A crown 3 made of ridge-grooved steel is fixed downwardly in the groove on the lower surface of the lattice beam 2, and the upper surface of the wall panel 4 on the first floor is the crown 3, and the upper surface of the base metal fitting 1 is the wall panel 5 on the second floor. I was trying to get it to fit.

Therefore, the construction of these beams is time-consuming, and the lattice beams 2
The weight of the base metal fitting 1 and the crown 3 is increased by the weight of the base metal fitting 1 and the crown 3, which is inconvenient to handle and increases the material cost.

Therefore, the purpose of this invention is to provide a lightweight lattice beam that can be easily combined with other building materials.

An embodiment of this invention is shown in FIG.

That is, this lattice beam is made by joining two light Z-beams 6 facing each other to form a groove 7 and a protrusion 8 on the back surface of the upper chord member 9, with the groove 7 facing downward and the groove 10 facing downward. A long piece of elongated material is arranged above the lower chord members 11 made of ridge-and-grooved steel and facing each other at a constant interval, and the inside of the groove part 7 of the upper chord member 9 and the back surface of the groove part of the lower chord member 11 are bent into a wave shape. They are connected and fixed by welding using a web material 12 made of reinforcing steel.

As a result of this configuration, as shown in FIG. By fitting the connecting groove 15 provided at the lower end of the lattice beam, the lattice beam can be easily constructed and the wall panels 13 and 14 of the 1.degree. second floor can be connected easily.

Further, this lattice beam has the advantage of being high in strength and lightweight since the protrusions 8 and the grooves 10, which are the connecting portions to the wall panels 13 and 14, are integrally formed in the lattice beam body.

Furthermore, since the lower chord member 11 is in the shape of a groove, commercially available channel steel can be used as is, and the upper chord member 9 is in the groove shape with the ridges 8, so as in this embodiment, It can be easily obtained by using two Z-shaped steels.

Therefore, there is no need to specially manufacture the upper chord material and the lower chord material 11 by roll forming or the like, and manufacturing is simple.

As described above, the lattice beam of this invention has a downwardly grooved top chord and a downwardly grooved bottom chord, which are integrally formed with longitudinal protrusions on the top surface, and are arranged facing each other at a constant interval. Since the upper chord member and the lower chord member are connected by welding and fixing a long bent web material, it is easy to connect with other building materials and is lightweight, reducing material cost and construction cost. There is an effect that it can be done.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional lattice beam, and FIG. 2 is a perspective view for explaining the construction of an embodiment of this invention. 8...Convex strip, 9...Top chord material, 1o...
Curved groove part, 11...open flat chord material, 12...web material.

Claims (2)

[Scope of utility model registration request] (1) A long web material is formed by arranging a downwardly grooved upper chord member integrally formed with a convex strip along the elongated direction on the upper surface and a downwardly grooved lower chord member facing each other at a certain interval and bent into a waveform. A lattice beam in which the upper chord member and the lower chord member are connected by welding and fixing. (2) The lattice beam according to claim 1, wherein the upper chord member is formed by symmetrically combining Z-beams to form a substantially inverted Y shape.