1. Wind Deflection Limits for Aircraft Hangar Portals
Standard warehouse rolling shutters bind and buckle at wind speeds exceeding 80 km/h. For large aircraft hangars spanning 40m to 80m, the structural door portal must withstand positive wind pressure and violent leeward suction up to 185 km/h.
Under **ASCE 7-16 Chapter 26 & 27**, the design wind suction ($P_{door}$) acting on the closed megadoor leaf is:
$$P_{door} = q_z cdot G cdot C_p - q_i cdot (GC_{pi})$$
Where the external pressure coefficient ($C_p$) along the windward side ranges from +0.8 to -1.2 on the leeward suction face. Champion vertical lifting fabric megadoors utilize heavy-duty extruded aluminum horizontal wind mullions spaced at 1.5m intervals to transfer dynamic wind loads directly into perimeter structural jamb columns.