Question

2X8 a 16" O.C. CONCRETE TILE 950 LB/SQUARE 2x6 16" O.C. 15/32" WOOD STRUCTURAL PANEL 10" FIBERGLASS LOOSE INSULATION 1/2" GYPSUM WALLBOARD

For the building shown above, calculate the sloped roof snow load, p_s, to be used for the design of the roof rafters. The building has a sheltered roof and will be used for a standard residential occupancy. In addition, the building is located in an area that is categorized as Exposure Category B and has a specified 90 psf ground snow load based on the local building code.

Answer 1

GIVEN DATA Ground Snow Load, 90 psf Pg = Roof Slope 8 in 12 Standard residential Occupancy Category Terrain Category В 3 (1-Fully Exposed, 2- Partially Exposed 3- Sheltered) Exposure : No Heating of building CALCULATIONS Flat Roof Snow Load, p Risk Category II Exposure Factor, Ce 1.1 Thermal Factor, C, = 1 Importance Factor, 1 Risk Cat 0.8 1 1.1 IV 1.2 Pf= 0.7 C C,IP Flat Roof Snow Load, 69.3 psf - Sloped Roof Snow Load, p . 8 12 Roof Slope 0tan 33.70 0.9 (obstructed surface) C Roof Slope Factor = Р, 3 С,р Sloped roof snow load, 62.4 psf