Steel Ceiling System
Core Data
E Expert Experience
For the Dubai Metro Green Line underground stations, we supplied a combined aluminum-steel ceiling system where the visible center span used aluminum baffles (for aesthetics and acoustic absorption) but the side wall sections—prone to maintenance crew impact from equipment handling—used 2.0mm steel with a high-build epoxy coating. The steel sections were designed to survive repeated impacts from 50kg maintenance carts at 5km/h without deformation. For a highway tunnel in Oman, the client needed a ceiling system that could withstand a 500kg concrete spall falling from 8 meters height. Our 4mm steel ceiling system with cross-bracing and backup safety netting passed the full-scale impact test per EN 14487. The engineering also included access hatches at 10-meter intervals for inspection crews.
T Technical Specifications
**Core Specifications:** • Materials: Hot-dip galvanized steel (Z275) / Pre-painted galvanized / Stainless steel SS304 • Grid profiles: 25×25mm / 38×38mm / 50×50mm / Custom heavy-duty (up to 100×50mm) • Wall thickness: 0.8mm – 4.0mm (based on load and span requirements) • Grid spacing: 300mm / 400mm / 600mm (based on ceiling panel size) • Fire rating: A1 (non-combustible, EN 13501-1) / 120-min fire barrier (EN 1364-1) • Impact resistance: 50kg cart at 5km/h / 500kg spall fall test (per EN 14487) • Corrosion protection: HDG 275g/m² (Z27) / 2-component epoxy (500μm DFT for tunnel use) • Surface finish: Mill / Powder coat / Pre-painted (RAL colors) • Access panels: Standard / Heavy-duty / Watertight / Fire-rated (per project spec) • Seismic: Designed per UBC Zone 4 / Eurocode 8