The transition to fundamentally changes how temporary, modular, and relocatable structures are engineered for environmental hazards . Under the updated ASCE 7 standard , portable buildings are no longer granted blanket exemptions or relaxed design criteria based solely on their transient status. Instead, engineers must strictly evaluate these structures against modernized wind maps, digital hazard tools, and newly introduced tornado provisions.
Portable buildings are highly sensitive to Component and Cladding (C&C) pressures because their exterior skin (siding, roofing panels, fasteners) transfers wind loads directly to the light-gauge steel or wood framing. ASCE 7-22 refined the external pressure coefficients ( GCpfcap G cap C sub p f end-sub GCpcap G cap C sub p ) for low-rise buildings.