Steel structure engineering -10 key points to remember for on-site construction workers

one point one

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.

one point two

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

one point three

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

one point four

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

one point five

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

Point 2

Steel component layout

two point one

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.

two point two

The important node dimensions of the structure or component in the machining drawing can be sampled or calculated for verification.

two point three

Before material marking, the steel specifications, materials, and batch numbers must be checked, and the surface of the steel must be cleaned of dirt such as oil and soil.

The third point

cutting

three point one

After setting out the profile steel flange plate, web plate, and end plate, use a CG1-100 semi-automatic cutting machine to cut to avoid 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.

three point two

Before cutting, the surface of the steel should be cleaned of rust, oil stains, etc.

three point three

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

Fourth point

Drilling

four point one

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.

four point two

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.

four point three

After the drilling is completed, a polishing machine should be used to thoroughly clean the bottom and remove burrs from the hole edges, without damaging the base material.

Point 5

assemble

five point one

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

five point two

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

five point three

The reasonable 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.

five point four

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.

Point 6

Welding and connection

six point one

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 location of the welding area