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Guangzhou Steel says:

Guangzhou Steel says: "The construction quality inspection norms steel works' quality requirements and inspection provisions

(1) Guangzhou Steel Steel: The steel is one of the following conditions should be carried out sampling re-examination, re-examination of its results should be in line with national commodity specifications and design requirements: imported steel; steel mixed batch; thickness equal to or greater than 40mm, and slab design performance requirements.
Inspection reports of high strength large hexagon head bolts convergence deputy and vice torsional shear strength bolts factory should join with me respectively with the tightening torque coefficient and axial force (pre-tension) to: (2) convergence with the fastening member specification.
(3) Guangzhou Steel Engineering steel welding: carbon steel should be cooled to ambient temperature in the cold, low-alloy structural steel welding should end after 24h, conduct inspection of welds.
(4) Guangzhou Steel Fasteners convergence projects: Normal bolt when the bolt as a permanent link, when the design requirements or II statement of their mass, should be a minimum tensile load of the bolt physical reinspection. A convergence of high strength bolts, bolts should be separately produced and device unit for anti-slip friction coefficient test and retest the surface. 2 high-strength hexagon head bolts screwed convergence deputy final end 1h after the final screwing torque check should be carried out within 48h. 3 deputy final convergence of high strength bolts screwed threaded bolts exposed should be 2 to 3 buttons, which allow 10% of threaded bolts to reveal a button or 4 button.
(5) steel member assembly works: Cranes and crane truss girder should Deflection.
(6) The single steel apparatus engineering: all vertical single steel main structure of promised deviation should be consistent H / 1000, and not greater than 25.0; all the twists and turns of the promised plane deviation should be consistent L / 1500, and not greater than 25.0. Guangzhou Steel