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<br />ROOF LOADING--Roof Number 1 <br /> <br />(pounds per square foot) <br /> <br />Roof cross slope = 3 inches per foot <br /> <br />Fiberglass shingles 90 # per square and 2 layer of 15 # felt = 1.2 <br />No insulation <br />1/2 in. roof sheathing = 1.5 <br /> <br />-------------------------------------------------------------------------- <br /> <br />Total roof unit weight on slope <br />Cosine of roof cross slope <br /> <br />= 2.7 <br />= .9701425 <br /> <br />-------------------------------------------------------------------------- <br /> <br />Roof unit weight on horizontal <br />2 in. x 4 in. wood trusses at 24 in. spacing <br />1 layer of 1/2 in. gypsum board ceiling--plain <br />Ceiling insulation R-30 <br />Air-conditioning ductwork <br />Full lighting <br />Miscellaneous <br /> <br />2.783096 <br />2.16043 <br />2 <br />.5 <br />1 <br />.3 <br />o <br /> <br />Total <br /> <br />-------------------------------------------------------------------------- <br />------------------------------------------------------------------------- <br /> <br />= 8.743526 <br /> <br />Roof Unit Dead Load = 9 psf <br />Roof dead load supported generally by wall <br /> <br />107.6788 plf <br /> <br />ROOF LOADING--Roof Number 2 <br /> <br />(pounds per square foot) <br /> <br />Roof cross slope = 3 inches per foot <br /> <br />--------------------------------------- <br /> <br />Fiberglass shingles 90 # per square and 2 layer of 15 # felt = 1.2 <br />No insulation <br />1/2 in. roof sheathing = 1.5 <br /> <br />------------------------------------------------------------------------- <br /> <br />Total roof unit weight on slope <br />Cosine of roof cross slope <br /> <br />= 2.7 <br />= .9701425 <br /> <br />------------------------------------------------------------------------- <br /> <br />Roof unit weight on horizontal <br />2 in. x 4 in. wood trusses at 24 in. spacing <br />1 layer of 1/2 in. gypsum board ceiling--plain <br />Ceiling insulation R-30 <br />Air-conditioning ductwork <br />Full lighting <br />Miscellaneous <br /> <br />2.783096 <br />2.16043 <br />2 <br />.5 <br />1 <br />.3 <br />o <br /> <br />Total <br /> <br />========================================================================= <br /> <br />= 8.743526 <br /> <br />Roof Unit Dead Load = 9 psf <br />Roof dead load supported generally by wall <br /> <br />107.6788 plf <br />