Steel Structure Construction Specifications Construction Space

Steel space truss steel structure specifications and welded roof construction structure

Steel space truss structural specifications and welded roof construction structures. Space Truss Steel Structure Specifications. The T-joints, cross joints, angle joints, and the opposing joints of the spatial truss structure differ. Angled combination welds require penetration. The size space frame and the space truss steel structure specifications of the weld leg should not be less than t / 4 (t is the thickness of the thinner plate, similar to below); The size of the welded leg of the space truss and the upper flange of the crane girder or similar components requires fatigue calculation is t / 2 and should not be greater than 10mm.

Steel space truss structural steel specifications. The allowable deviation of the weld foot size is 0 ～ 4mm. A number of checks: all documents are checked; randomly inspect 10% of similar welds and not less than 3 pieces.

Specifications of steel truss space. There shall be no defects such as cracks and welds on the surface of the weld. Primary and secondary welds shall not contain defects such as surface pitting, slag, crater cracks, arc scratches, and primary welds shall not contain defects such as cuts or incomplete welds. Adjust, shrink. See table 4.1.8.4-13 for (construction) quality control for the weld surface test report.

Checking the welding specifications and welding techniques

Quantity of the space truss steel structure technical inspection: 10% of each batch of similar space truss steel structure engineering components will be tested at random and not less than 3 pieces; Of the components tested, 5% of each type of weld shall be randomly inspected according to the number of welds and not less than 1; 1 site per inspection, The total number of on-site inspections should not be less than 10.

Comply with space truss steel structure technique. The steel space frame construction unit must perform the welding process for the welding nails and steel materials used, resulting in the achievement of design requirements and relevant current national standards. . Porcelain rings must be heated according to the manufacturer's product instructions. The welding procedure validation report and baking record shall be provided.

After welding the welds, a bend test shall be carried out and there shall be no visible cracks in the weld and the heat affected area. A number of inspections: Random inspection of 10% technical steel space truss steel structure of each batch of similar parts and not less than 10 pieces; Of the randomly inspected parts, each is equal to 1% of the number of tested solder nails, but not less than one.

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