Steel structure engineering construction main detection content?

The main detection content in steel structure workshop engineering includes: the detection of component size and flatness; Component surface defect detection; Connection (welding, bolt connection) testing; Steel corrosion detection; Fire retardant coating thickness testing. If the steel has no factory certificate, or there is doubt about its quality, the mechanical property test of the steel should be added, and the chemical composition of the steel should be tested if necessary. The components used in the steel structure are generally produced in batches by steel mills and need to be certified, so the strength and chemical composition of materials are well guaranteed. The key point of engineering inspection lies in the quality problems generated in the process of installation and splicing.

1, the main detection content of steel structure engineering is: component size and flatness detection; Component surface defect detection; Connection (welding, bolt connection) testing; Steel corrosion detection; Fire retardant coating thickness testing. If the steel has no factory certificate, or there is doubt about its quality, the mechanical property test of the steel should be added, and the chemical composition of the steel should be tested if necessary.

2. Knowledge of the application scope of steel structure testing specifications.

3.Each dimension is measured in three parts of the component, and the average value of the three parts is taken as the representative value of the dimension. The size deviation of steel member shall be calculated according to the size specified in the design drawing. The allowable value of deviation shall conform to the requirements of its product standard. The deformation of beam and truss members has vertical deformation in plane and lateral deformation out of plane, so the flatness of the two directions should be detected. The deformation of column is mainly incline and deflection. Inspection can be first visual inspection, found abnormal conditions or doubt, beam, truss can be in the component fulcrum tension between a wire or thin line, and then measure the sag and deviation of each point; The tilt of the column may be measured with a theodolite or plumb. Column deflection can be measured by pulling a wire or thin line between the fulcrum of the member.