Logo is the difference between the steel material, the specification of the mark, the main description of the steel supplier for steel structure hangar, grade, inspection lot number, size, size, level, net weight and so on.
Compared with ordinary steel, special steel has a higher strength and toughness, physical properties, chemical properties, biocompatibility and process performance.
Second.the classification of steel for prefabricated steel structure Steel is iron and carbon alloy with carbon content between 0.04% and 2.3%.
Before introducing the classification of steel structure building, please briefly introduce the basic concepts of ferrous metals, steel and non-ferrous metals.
Roofing works for sub-project acceptance, the quality should meet the following requirements:
The base positioning axis and the support steel cylinder surface elevation exceed the allowable deviation of the specification.
The following principles shall be observed in the design calculation of the reinforcement structure.
Reduce the load, change the calculation of graphics, increase the original structure of the cross-section and the connection strength, to prevent crack propagation
When the welding is strengthened, the high temperature will cause the organization and performance of the welded parts to deteriorate.