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JOB NO.: U2782.1095.201 <br /> EC' T 0 <br /> R SUBJECT: GRAVITY LOADS <br /> E n o i n E E R S <br /> PROJECT: Alfonso Aguirre Residence <br /> CALCULATE ESTIMATED GRAVITY LOADS Roof Pitch: 4.1 :12 <br /> Design material Increase due to Material weight <br /> ROOF DEAD LOAD (D) weight [psf] pitch [psf] <br /> Composite Shingles 2.1 1.06 2.0 <br /> 1/2" Plywood 1.1 1.06 1.0 <br /> Framing 3.0 3.0 <br /> Insulation 0.5 0.5 <br /> 1/2" Gypsum Clg. 2.1 1.06 2.0 <br /> M, E & Misc 1.5 1.5 <br /> Total Original Roof DL 10.3 <br /> PV Array DL 3.2 1.06 3 <br /> ROOF LIVE LOAD (Lr) <br /> Existing Design Roof Live Load [psf] 20 ASCE 7-10, Table 4-1 <br /> Roof Live Load With PV Array [psf] 0 2015 WBC, Section 1607.12.5 <br /> SNOW LOAD (S): Existing w/ Solar Array <br /> Roof Slope [x:12]: 4.1 4.1 <br /> Roof Slope [°]: 19 19 <br /> Snow Ground Load, pg [psf]: 20 20 ASCE 7-10, Section 7.2 <br /> Terrain Category: C C ASCE 7-10, Table 7-2 <br /> Exposure of Roof: Fully Exposed Fully Exposed ASCE 7-10, Table 7-2 <br /> Exposure Factor, Ce: 0.9 0.9 ASCE 7-10, Table 7-2 <br /> Thermal Factor, Cf: 1.1 1.1 ASCE 7-10, Table 7-3 <br /> Risk Category: II II ASCE 7-10, Table 1.5-1 <br /> Importance Factor, Is: 1.0 1.0 ASCE 7-10, Table 1.5-2 <br /> Flat Roof Snow Load, pf [psf]: 14 14 ASCE 7-10, Equation 7.3- <br /> Minimum Roof Snow Load, pm [psf]: 0 0 ASCE 7-10, Section 7.3.4 <br /> Unobstructed Slippery Surface? No No ASCE 7-10, Section 7.4 <br /> Slope Factor Figure: Figure 7-2b Figure 7-2b ASCE 7-10, Section 7.4 <br /> Roof Slope Factor, Cs: 1.00 1.00 ASCE 7-10, Figure 7-2 <br /> Sloped Roof Snow Load, ps [psf]: 14 14 ASCE 7-10, Equation 7.4- <br /> Design Snow Load, S [psf]: 14 14 <br />