6920 SEAWAY BLVD 2024-03-05 - Laserfiche WebLink

Wind Pressures for Roofs (gable roofs. & hip roofs) with h <_ 60' 'Note: Design wind pressures shall not be less than a net pressure of 16psf (ult) acting in either direction normal to the surface. Wind Pressures Acting Toward Surface Roof Surface 1, 2 & 3 = 7.4 psf (LRFD) = 4.4 psf (ASD) Wind Pressures Acting Away From Surface Roof Surface 1 = -21 psf (LRFD) _ -12.6 psf (ASD) Roof Surface 2 = -24.9 psf (LRFD) _ -14.9 psf (ASD) Roof Surface 3 = -24.9 psf (LRFD) _ -14.9 psf (ASD) Wind Pressures Acting Away From Surface (Overhang) Roof Surface 1 = -27 psf (LRFD) _ -16.2 psf (ASD) Roof Surface 2 = -27 psf (LRFD) _ -16.2 psf (ASD) Roof Surface 3 = -15.6 psf (LRFD) _ -9.4 psf (ASD) 7— 2— 32 _ L3 I I I I I I I I I I I I I I I I I I I 8 �1 5. If a parapet equal to or higher than 3 ft (0.9m) is provided around the perimeter of the roof with 0 <_ 7e, the negative values ofGC, in Zone 3 shall be equal to those for Zone 2 and positive values of GCp in Zones 2 and 3 shall be set equal to those for wall Zones 4 and 5 respectively in Figure 30.4- I. Wind Pressures for Parapets (gable roofs. & hip roofs) with h <_ 60' 'Note: Design wind pressures shall not be less than a net pressure of 16psf (ult) acting in either direction normal to the surface. pp = gp[(GC,) - (GCpi)l (lb/ftZ) Velocity pressure, qp = 20.9 psf Parapet Load Case A Wind load @ corner, pp = 37 psf (LRFD) = 22.2 psf (ASD) Wind load not @ corner, pp = 37 psf (LRFD) = 22.2 psf (ASD) Parapet Load Case B Wind load @ corner, pp = 30.8 psf (LRFD) = 18.5 psf (ASD) Wind load not @ corner, pp = 29.9 psf (LRFD) = 17.9 psf (ASD) Windward parapet Load Case A F19 M0 1 PosiMe WL Fg_ 30,i2A-2e Ressure napatr+e Mt Zone a 85 Vraseure 2one283 r Leeward parapet Load Case B Top of parapet