JPH06167048A - Mounting structure of lattice beam - Google Patents

Abstract

PURPOSE:To increase the height of a ceiling with its cost maintained inexpensive and the rigidity of the joint part of lattice beam maintained to generate no problem in practice. CONSTITUTION:A plate-like web-plate 1 is erected vertically to form an end plate 2. The web-plate 1 is inserted into a notched part 10 formed at least one end of upper and lower chord members 4a, 4b and the end plate 2 is set on the end of the upper and lower chord members 4a, 4b to form a lattice beam 3. On the outside of the upper chord 4a or lower chord member 4b in the up and down directions the end plate 2 and the web-plate 1 are set to project to form a piece to be fixed 6 and a rib part 5 respectively. The piece 6 is fixed to a column 7 by means of a bolt. With such an arrangement, it is possible to prevent the pitch from becoming narrow between the bolt 8b by which the piece 6 is fixed to the column 7 and the bolt 8a by which the end plate 2 is fixed to the column 7, Furthermore, it is possible to support the lattice beam 3 by the rib part 5 protruding to the outside of the chord member 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a lattice beam in a steel building.

[0002]

2. Description of the Related Art A lattice beam 3 is formed by forming a large number of diagonal web members 9 between a pair of parallel upper chord members 4a and lower chord members 4b over the entire length and at the end of the lattice beam 3. Is formed by providing an end plate 2 formed by vertically projecting a web plate 1 at the center in the width direction. Then, as shown in FIG. 4, the end plate 2 provided at the end of the lattice beam 3 is brought into contact with the outer surface of the column 7, and the end plate 2 is fixed to the column 7 with bolts 8a and 8b. Can be attached to the pillar 7. The height of the ceiling formed below the lattice beam 3 is increased by reducing the beam size of the lattice beam 3.

[0003]

However, if the lattice length of the lattice beam 3 is reduced, the length of the end plate 2 in the longitudinal direction also becomes shorter, and the pitch of the upper and lower bolts 8a and 8b becomes narrower accordingly, and the pillar 7 and The rigidity of the joint portion of the lattice beam 3 was low. The present invention has been made in view of the above points, and an attachment structure for a lattice beam that is inexpensive and can secure the rigidity of the joint portion between the column and the lattice beam to such an extent that it does not pose a practical problem and can increase the height of the ceiling. It is intended to be provided.

[0004]

A lattice beam mounting structure according to the present invention has a plate-shaped web plate 1 vertically protruding to form an end plate 2, and an upper chord member 4a and a lower chord member 4b.
Of the upper chord member 4a and the lower chord member 4b to attach the end plate 2 to the lattice beam 3 to form the lattice beam 3, and the notch portion 10 was provided. The end plate 2 and the web plate 1 are projected outside the upper chord member 4a or the lower chord member 4b in the vertical direction to form the fixing pieces 6 and the rib portions 5, respectively, and the fixing pieces 6 are fixed to the columns 7 with bolts 8. It is characterized by being formed.

[0005]

The plate-shaped web plate 1 is vertically projected to form the end plate 2, and the web plate 1 is formed in the notch 10 provided at the end of at least one of the upper chord member 4a and the lower chord member 4b.
End plate 2 is attached to the ends of the upper chord member 4a and the lower chord member 4b to form a lattice beam 3, and the end plate is formed on the outer side in the vertical direction of the upper chord member 4a or the lower chord member 4b provided with the notch 10. 2 and the web plate 1 are projected to form the fixing pieces 6 and the rib portions 5, respectively, and the fixing pieces 6 are fixed to the pillars 7 with the bolts 8. Therefore, even if the beam formation is reduced, the fixing pieces 6 are fixed to the pillars 7. The pitch of the bolt 8b and the other bolt 8a that fixes the end plate 2 to the pillar 7 can be prevented from becoming too narrow. Further, the lattice beam 3 can be supported by the rib portion 5 protruding to the outside of the chord member 4.

[0006]

EXAMPLES The present invention will be described in detail below with reference to examples. Figure 2
Shows an embodiment of the present invention. The lattice beam 3 is provided with a web member (not shown) between a pair of parallel upper chord members 4a and lower chord members 4b over the entire length thereof, and a web plate 1 is vertically projected from the end portion of the lattice beam 3. It is formed by providing the end plate 2 which is formed. The end plate 2 is formed of a metal plate or the like, and a web plate 1 formed of a metal plate or the like is vertically provided so as to vertically extend at the center in the width direction thereof. The lower chord member 4 of the lattice beam 3 is attached to the end plate 2.
A fixing piece 6 projecting downward from b is integrally provided, and the web plate 1 is integrally provided with a rib portion 5 projecting below the lower chord member 4b from a notch portion 10 provided at an end of the lower chord member 4b. It is provided. Further, bolt holes 11 are provided symmetrically across the web plate 1 between the upper portion of the end plate 2 and the fixing piece 6 of the end plate 2.

Then, as shown in FIGS. 1 (a) and 1 (b), the end plate 2 attached to the end of the lattice beam 3 is brought into contact with the outer surface of the column 7 so that the upper portion of the end plate 2 and the fixing piece 6 are fixed. The lattice beams 3 can be attached to the pillar 7 by inserting the bolts 8a and 8b into the provided bolt holes 11 and screwing the bolts 8a and 8b into the pillar 7. Although the lattice beam 3 has a small beam formation, the pitch of the bolts 8b when the bolts 8a on the upper portion of the end plate 2 and the fixing pieces 6 are attached is
It is possible to obtain a pitch substantially the same as the pitch of the upper and lower bolts 8a and 8b of the lattice beam 3 which is normally attached as shown in FIG. Further, the lattice beam 3 can be supported by the rib portion 5 of the web plate 1 which projects below the lower chord member 4a of the lattice beam 3. Therefore, the rigidity of about 2/3 of the rigidity of the conventional lattice beam 3 and the pillar 7 can be obtained.

FIG. 3 shows another embodiment. In this embodiment, notches 10 are provided at both ends of the upper chord member 4a and the lower chord member 4b, and the upper fixing piece 6a having the end plate 2 extending above the upper chord member 4a and the web plate 1 extend. A lower fixing piece 6 having an upper rib portion 5a provided so as to project and an end plate 2 extending below the lower chord member 4b.
b and a lower rib portion 5b extending from the web plate 1 are formed to project. Then, the upper rib 5 is provided on the upper fixing piece 6a.
Bolt holes 11 are provided symmetrically with respect to a, and bolt holes 11 are provided symmetrically with respect to the lower fixing piece 6b with respect to the lower rib portion 5b. To attach the lattice beam 3 to the pillar 7, the end plate 2 is brought into contact with the outer surface of the pillar 7,
Bolts 8a, 8 are provided in the bolt holes 11 of the upper and lower fixing pieces 6a, 6b.
This is done by inserting b and screwing it into the pillar 7.

In this embodiment, although the lattice beam 3 has a small beam formation, the pitch of the bolts 8a and 8b is the upper and lower bolts 8a and 8b of the lattice beam 3 which is normally attached as shown in FIG. It is possible to obtain a pitch that is almost the same as the pitch. Further, the lattice beam 3 can be supported by the upper and lower rib portions 5a and 5b. Therefore, the same rigidity as that of the lattice beam 3 and the pillar 7 mounted by the conventional technique can be obtained.

[0010]

As described above, according to the present invention, the plate-shaped web plate is vertically projected to form the end plate, and the web is formed in the notch formed in at least one end of the upper chord member and the lower chord member. Insert the plate and attach the end plates to the ends of the upper and lower chords to form a lattice beam, and project the end plate and the web plate to the outer side of the upper and lower chords with notches in the vertical direction. Since the fixing pieces and ribs were respectively formed by fixing the fixing pieces to the pillars with bolts, the bolts that fixed the fixing pieces to the pillars and the end plates were fixed to the pillars even if the lattice formation of the lattice beam was reduced. The pitch of the bolts can be prevented from becoming too narrow, and the ribs that project to the outside of the chord can support the lattice beam, making the rigidity of the joint between the column and the lattice beam a practical problem. Probably not to be It is capable of increasing the ceiling height by reducing the RyoNaru while.

[Brief description of drawings]

FIG. 1A is a side view and FIG. 1B is a bottom view of a partial cross section of an embodiment of the present invention.

FIG. 2 is a perspective view of the lattice beam of the same.

3A is a side view and FIG. 3B is a partial cross-sectional top view of another embodiment of the same.

FIG. 4 is a side view of a conventional example.

[Explanation of symbols]

 1 web plate 2 end plate 3 lattice beam 4a upper chord member 4b lower chord member 5 rib portion 6 fixing piece 7 pillar 8 bolt 10 notch portion

Claims (1)

[Claims] 1. A plate-shaped web plate is vertically projected to form an end plate, and the web plate is inserted into a notch formed in at least one end of the upper chord member and the lower chord member to insert the upper chord member and the lower chord member. Attach the end plate to the end of the material to form a lattice beam, and project the end plate and web plate to the outside of the upper chord material or lower chord material with cutouts in the vertical direction to fix the fixing piece and the rib part, respectively. Lattice beam mounting structure that is formed by fixing the fixing pieces to the pillars with bolts.