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Structural Design Criteria Development Services Division 1055 South Grady Way – Renton, WA 98057 Phone: 425-430-7200 www.rentonwa.gov STRUCTURAL DESIGN CRITERIA SNOW LOAD - 25 PSF Roof - 25 psf. uniform load. Note: uniform snow load does not require design for snow drift. GROUND SNOW LOAD - 20 PSF ULTIMATE DESIGN WIND SPEED VULT - 110mph. FOR RISK CATEGORY II BUILDINGS AND OTHER STRUCTURES Exposure factor - B applicable in most areas Exposure factor - C wind over open water for one mile. SEISMIC DESIGN CATEGORY - D Frost Depth one story 12”, two story 18”, three story 24”