Frequently Asked Questions (FAQ)
Clear, direct, and verifiable answers to common engineering, material, installation, and commercial inquiries about self-supported roofing systems.
What is the maximum clear-span achievable without intermediate trusses?
Direct Answer: Self-supported arch roofing systems typically achieve clear spans up to 35 meters (and higher with specialized engineering analysis) with zero intermediate trusses or internal columns.
How are self-supported arch panels joined without leaking?
Direct Answer: Adjacent panels are interlocked and permanently double-folded using a motorized mechanical seaming machine on-site. This eliminates the thousands of piercing screws and drill holes required in conventional sheet roofing.
What raw material and coating standard does Sairaj Roofing use?
Direct Answer: We use prime Galvalume steel conforming to ASTM A792 Grade D (or IS 15965) with high tensile yield strength (550 MPa) and an AZ150 coating (150 g/m² Aluminium-Zinc alloy).
Does Sairaj Roofing execute projects outside Pune?
Direct Answer: Yes. While headquartered in Pune, our specialized mobile roll-forming setups and installation crews routinely deploy for industrial projects across Western Maharashtra and pan-India.