JPH02153168A - On-site welding method for steel beams - Google Patents

Abstract

PURPOSE:To perform operations safely and easily with high efficiency by a method in which a steel structural beam is lifted up through a metal tool attached to the connecting end of the beam between the beam connections of steel columns and connected to the connections, and the beam is welded with the beam connections. CONSTITUTION:Metal tools 4 with through holes for attaching hangers on one side, having horizontal downside, are welded to the upside of the connecting end of a steel structural beam 3 by projecting their one ends from the connecting end. The beam 3 is lifted up through the metal tools 4 between the beam connections 2 of steel columns 1, and the metal tools 4 are connected to the connections 2. The beam 3 is supported by the tools 4 and welded to the connections 2.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method of welding a beam joint protruding from the side of a steel column and a steel beam on site.

[Conventional technology] Generally, in on-site welding of steel beams, a worker waits on the beam at the beam joint of the steel column, and then lifts the steel beam between the beam joints of the steel column and adjusts the height of the beam. To match the height and width direction (7 lunges), while sending a signal to the crane driver, we made fine adjustments while operating the crane up and down or left and right, and then drilled holes in the web of the steel beam. Insert a drift bottle (Porusin) etc. into the hole of the splice plate attached to the steel beam side and align the bolt holes to fix the beam joint and the steel beam. Then, tighten the bolts on the web part. The welding of the upper and lower flank parts is being carried out.

[Problem to be solved by the invention 1] In the above method, it takes time to adjust the height of the beam and the width direction of the steel beam, which are the pre-processes for welding the beam joint of the steel column and the steel beam. have a problem.

This invention was devised to solve such problems, and its purpose is to improve the relationship between beam joints and steel beams.
To provide a new on-site welding method for steel beams, which can maintain the same height, easily align the steel beams in 11 directions, and weld the steel beams together.

[Means for Solving the Problems] A feature of the present invention according to the above object is that a metal fitting with a horizontal lower side and a hole through which a hanging device is attached is connected to the connecting end of a steel beam! One end is welded to protrude from the other end, and the steel beam is lifted up through the metal fittings, suspended between the beam joints of the steel column, and the steel beam is supported by the metal fittings fixed above the beam joints. The purpose is to weld joints and steel beams.

[Function] In the above method, the steel beam is supported at the same height as the beam joint by the metal fittings on the beam joint, and alignment in the width direction is easy, and welding can be performed efficiently from above the beam joint. be able to.

As an example, a case will be described below with reference to drawings in which the steel frame wear part is bolted and the upper and lower flange parts are welded on site.

[Example] In the figure, 1 is a steel column, 2 is a beam joint protruding from the side of the steel column 1, and 3 is a steel beam.

The beam joint 2 and the steel beam 3 have the same length, and bolt holes are drilled at the same position in the webs 2a and 3a at the connecting ends of both.

Moreover, on the upper flange 3b of the connection end of the steel beam 3,
The metal fitting 4 is attached by welding with one end protruding horizontally. The metal fitting 4 is made of a thick rectangular metal piece with a recess in the center of the horizontal lower side, and a hole 5 is provided through the side surface welded to the steel beam 3 for attaching a hanging device.

To attach this hanging tool, a shackle 6 is attached to the hole 5, and the sling attached to the shackle 6 is attached to the wire 7.
The steel beam 3 is hoisted up by a crane or the like, and further suspended between the beam joints 2.

The steel beam 3 between the beam joints is supported by the protruding portion of the metal fitting 4 mounted on the upper flange 2b of the beam joint 2.

By supporting this metal fitting 4, there is no deviation in the height of the steel beam 3 and the steel joint 2, and there is no deviation in the position of the steel beam 3, so the joint plates 8 and bolts 9 directly connect the two pieces. can be done.

After this wear connection, the sling wire 7 is removed and the upper 7 flanges 2b, 3b and the lower flanges 2c, 3c are welded together from above the beam joint 2.

The on-site welding method for steel beams according to the present invention is not limited to this embodiment, but can also be applied to cases in which the upper and lower seven flange teeth and web portions of the steel beam are welded on-site. .

[Effects of the Invention] As described above, the present invention welds a metal fitting whose lower side is horizontal and has a hole for attaching a hanger on one side, with one end protruding from the connection end, on the connection end of a steel beam. Suspending the steel beam between the beam joints of the steel columns via the metal fittings, supporting the steel beams with the metal fittings attached above the beam joints, and welding the beam joints and the steel beams. Therefore, compared to the conventional method, there are fewer work steps, and the height can be easily maintained and positioning can be done easily.As the sling is attached to the metal fittings, the lifting wire such as wire is attached to the metal fittings, so it is easy to attach and detach the wire. It has the advantage of being able to ensure work safety, such as being easily removed from the body, and being much more efficient than previous methods.

[Brief explanation of the drawing]

The drawings illustrate an on-site welding method for a seven-lunge steel beam according to the present invention, and FIG. 1 is a front view of a steel column and a steel beam;
FIG. 2 is a perspective view of the end of the beam, and FIG. 3 is a partial front view when connected. 1... Steel column 3... Steel beam 5... Hole 7... Wire 9... Bolts 2a, 3a. ... Webs 2b, 3b ... Upper flanges 2G, 3C ... Lower flange 2 ... Beam joint 4 ... Metal fittings 6 ... ...Shackle 8...Joint plate

Claims (1)

[Claims] Weld a metal fitting with a horizontal lower side and a hanging tool installation hole on one side on the connection end of the steel beam, with one end protruding from the connection end, and lift the steel beam through the metal fitting to attach it to the steel beam. A method for on-site welding of steel beams, characterized in that the steel beams are supported by the metal fittings suspended between the joints and attached to the beam joints, and the beam joints and the steel beams are welded.