Steel Structure Buyer : Common Pitfalls( Section 1-5 ) - Knowledge

1. Steel Structure Key Point 1. Only Compare Unit Price, Ignore Steel Material Grade Low-cost suppliers replace Q355B high-strength steel with thin Q235B thin plate, cut H-beam wall thickness secretly. Under heavy snow, wind load, the frame will deform, service life drops below 15 years. Suggestion: Sign material inspection clause, require third-party material test report before shipment...

Steel Structure Buyer : Common Pitfalls( Section 1-5 )
1. Steel Structure Key Point 1. Only Compare Unit Price, Ignore Steel Material Grade

Low-cost suppliers replace Q355B high-strength steel with thin Q235B thin plate, cut H-beam wall thickness secretly. Under heavy snow, wind load, the frame will deform, service life drops below 15 years. Suggestion: Sign material inspection clause, require third-party material test report before shipment.

2. Steel Structure Key Point 2. Ignore Local Wind, Snow & Seismic Load Standard

Many small factories only produce general drawing without regional load calculation. For Canada heavy snow, Middle East strong wind, coastal salt fog areas, non-customized design leads to structural collapse risk. Suggestion: Provide local building code data to manufacturer, confirm engineer completes targeted structural calculation.

3. Steel Structure Key Point 3. Skip Anti-Corrosion Coating Inspection

Steel rust is the biggest hidden danger of short service life. Inferior suppliers only do one thin paint without shot blasting rust removal; coastal projects rust within 3 years. Standard anti-corrosion process: Shot blasting Sa2.5 grade + primary anti-rust paint + top finish paint; marine projects use hot-dip galvanizing for all steel components.

4. Steel Structure Key Point 4. Choose Factories Without Independent Design Team

Pure processing manufacturers only produce according to buyer’s rough sketch, unable to adjust structural force, cannot solve space span, crane load demand, cause rework and extra cost. Professional steel factory owns full BIM design team, can optimize drawing to save steel consumption while guarantee safety.

5. Steel Structure Key Point 5. Neglect International Certification & Customs Document

EU, Australia, US projects require CE, ACRS, EPD carbon report. Factories without certification will result in goods detained at port, pay high carbon tariff or return shipment.