The main job of steel structure construction workers

1. Preparation work

(1) Before processing the steel structure, the construction personnel shall prepare the process regulations and the chief engineer shall approve them. Carefully inspect the process preparation of each process, and prepare and mutually review the processing drawings.

(2) Inspect various materials and tools required for processing, and ensure that the process equipment meets the requirements of the process regulations.

(3) Construction personnel shall carry out technical disclosure work for each process in advance.

(4) Provide training and assessment in advance for operators on duty, confirm the qualifications for special types of work, and hold certificates to work.

(5) Before setting out, the processing drawings should be checked and the process requirements should be mastered. Any problems found should be promptly reported to the relevant departments.

2. Steel component layout

(1) During the laying out process of steel components, it is necessary to verify the quantity, material specifications, models, dimensions, etc. of the steel structure and connectors, and then carry out batching, marking and laying out, and sorting and stacking.

(2) The important node dimensions of the structure or component in the processing drawing can be sampled or calculated for verification.

(3) Before marking, the steel specifications, materials, and batch numbers must be checked, and dirt such as oil and soil on the steel surface must be removed.

3. Cutting

(1) After setting out the profile steel flange plate, web plate, and end plate, use a CG1-100 semi-automatic cutting machine to cut, avoiding the phenomenon of uneven edges, missing edges, and broken corners of steel components; Rib plates and rigid support connecting plates are cut using a shearing machine; The profiles are cut manually or with a grinder.

(2) Before cutting, rust, oil stains, etc. on the surface of the steel should be removed thoroughly.

(3) Plate gas cutting should be carried out on a dedicated platform.

4. Drilling

(1) The connection between steel components and connectors is connected with high-strength bolts. The position and size of the aperture require precision and high accuracy. Use a drilling machine to drill holes.

(2) When drilling, use a drilling jig and a laminated plate sleeve drill, and fix the hole with a fixture to prevent the drilling jig or the laminated plate from being misaligned.

(3) After the hole is made, a polishing machine should be used to thoroughly remove burrs from the hole edge, without damaging the base material.

5. Assembly

(1) Before assembly, the parts should be corrected, and thicker steel plates can be corrected using a press or flame heating.

(2) The components are corrected using a flange straightening machine to correct the beams produced.

(3) The assembly sequence of components should be determined based on their structural form, welding and connection methods, and welding and connection sequence. To reduce welding and joint deformation.

(4) The steel columns and beams of this project are all solidly sampled on a steel platform in a 1:1 ratio, and all parts are assembled according to the processing drawings

6. Welding and connection

(1) General requirements

Welders must hold a certificate to work.

Welding rods and fluxes should be baked according to the baking temperature specified in the technical manual before use,.

Before welding, the welder should recheck the quality of the component joints and the treatment of the welding area. If it does not meet the requirements, it should be repaired and qualified before welding can be carried out.

(2) Welding and welding processes

Before welding, the construction personnel shall prepare welding and welding process instructions based on the process qualification certificate, and provide specific guidance for the welder to proceed