Fire Rated Grade A Large Clear Span Prefab Steel Structure Workshop Factory 60m Width Q355B Portal Frame

Fire Rated Grade A Large Span Steel Structure Workshop

A heavy-duty industrial workshop solution combining Grade A fire safety certification with ultra-wide 60m clear span capability. The Q355B portal frame design eliminates interior columns, providing unrestricted workflow for manufacturing, assembly lines, and crane-operated facilities.

Key Advantages

• Grade A Fire Rating: Intumescent fireproof coating achieving 2-hour structural fire resistance, compliant with international industrial safety codes
• 60m Clear Span: Single-span portal frame up to 60m without intermediate columns, maximizing floor layout flexibility
• Q355B Portal Frame: High-strength low-alloy steel with 355 MPa yield strength, optimized for heavy crane loads and wide spans
• Overhead Crane Ready: Crane runway beams and bracket systems pre-integrated for 5T-20T overhead bridge cranes
• Automatic Ventilation: Ridge ventilators with thermostatic control and wall louvers maintain air quality and temperature

Technical Specifications

Component	Specification
Main Frame	Q355B Welded H-Section Portal Frame
Roof Purlin	Q235B Hot Dip Galvanized C/Z Section
Crane Beam	Q355B Welded H-Section with Stiffeners
Roof Cladding	0.6mm Standing Seam Aluminum-Zinc Coated
Wall Cladding	0.5mm Color Steel Corrugated Sheet
Fire Coating	Intumescent 2-Hour Fire Rated Paint System
Skylight	1.5mm FRP Translucent Sheet 10% Coverage

Product Tags:

Fire Rated Grade A steel workshop

      

Large clear span prefab factory

      

Q355B portal frame steel building

      

Fire Rated Grade A Large Clear Span Prefab Steel Structure Workshop Factory 60m Width Q355B Portal Frame Images