Steel roofing JI 70-450

thermalribbed

Description
The JI 70-450 is a structural steel plate designed for double-skin roofing, providing uniform load distribution and secure cladding fastening. Its horizontal installation facilitates optimal integration of thermal insulation, improving the building's energy performance. Compatible with spacers to enhance insulation effectiveness, it is available in customizable lengths, widths and finishes to meet specific industrial and commercial project requirements.

Dimensions
Length: Min. 1,000.0 mm / max. 13,600.0 mm
Width: Max. 450.0 mm

Thickness and weight
0.75 mm: 8.5 kg/m²
0.88 mm: 9.98 kg/m²
1.00 mm: 11.34 kg/m²

Main features

• Material: Steel S320 GD
• Designed for double-skin roofing and secure cladding fixation
• Horizontal installation that supports integration of thermal insulation
• Compatible with spacers to improve insulation performance
• Customizable dimensions and finishes according to project needs

Coatings available

• Interieurcoating 912 (15 µ) — Base coating for interior construction applications only
• Galva (galvanized)

Reference standards
Galvanized steel: NF EN 10346:2015 - tolerances according to NF EN 10143:2006 - NF P34-310:2017
Coil coating: NF EN 10169:2022 - NF P34-301:2017
Tolerance: NF EN 14782:2006 – NF EN 508-1:2021
Calculations: Tests according to NF P 34-503-1:2024 interpreted according to NF P 34-205-1:1997 (DTU 40.35) for cladding application and NF DTU 43.3 P1-2:2008 and Cahier CSTB 3537_v2:2009 for roofing application

Technical characteristics / specifications

• Model: JI 70-450
• Material: Steel S320 GD
• Length: 1,000.0 mm to 13,600.0 mm
• Maximum width: 450.0 mm
• Thicknesses and masses: 0.75 mm = 8.5 kg/m²; 0.88 mm = 9.98 kg/m²; 1.00 mm = 11.34 kg/m²
• Coatings available: Interieurcoating 912 (15 µ), Galva
• Applications: double-skin roofing, cladding (secure fixation)
• Compatibility: use with spacers to improve insulation
• Compliance with standards: NF EN 10346, NF EN 10169, NF EN 14782 / NF EN 508-1 and other references indicated for calculations and tests