The main content of our company's steel structure detection includes: detection of steel structure weld, bolt link, component size and defects, damage, deformation and structure detection, usually used detection instruments are laser range finder, theodolite, level, total station, etc., by measuring the deflection of the steel structure. The deformation of steel structural members is determined by the inclination degree, and the structural inspection is to analyze and judge whether the structural members meet the standard requirements of the relevant codes according to the detected and measured structures.