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VECTOR STRUCTURAL ENGINEERS <br />JOB NO.: U3998.0066.231 <br />SUBJECT: GRAVITY LOADS <br />PROJECT: West Alton Residence <br />GRAVITY LOADS Roof Pitch: 2.0 :1 2 <br />ROOF DEAD LOAD (D) <br />Increase due to <br />pitch <br />Material weight <br />[psf] <br />Composite Shingles 1 .01 2.0 <br />1 /2" Plywood 1 .01 1 .0 <br />Framing 1 .00 3.0 <br />Insulation 1 .00 0.5 <br />1 /2" Gypsum Clg.1 .01 2.0 <br />M, E & Misc 1 .00 6.5 <br />Total Existing Roof DL <br />PV Array DL 1 .01 3 <br /> DL:1 .01 <br />ROOF LIVE LOAD (Lr) <br />Existing Design Roof Live Load [psf]20 ASCE 7-1 6 Table 4.3-1 <br />Roof Live Load With PV Array [psf]0 <br />SNOW LOAD (S):w/ Solar Array <br />Roof Slope [x:1 2]:2.0 <br />Roof Slope [°]:9 <br />Ground Snow Load, pg [psf]:0 ASCE 7-1 6, Section 7.2 <br />Terrain Category:C ASCE 7-1 6, Table 7.3-1 <br />Exposure of Roof:Fully Exposed ASCE 7-1 6, Table 7.3-1 <br />Exposure Factor, Ce:0.9 ASCE 7-1 6, Table 7.3-1 <br />Thermal Factor, Ct:1 .1 ASCE 7-1 6, Table 7.3-2 <br />Risk Category:II ASCE 7-1 6, Table 1 .5-1 <br />Importance Factor, Is:1 .0 ASCE 7-1 6, Table 1 .5-2 <br />Flat Roof Snow Load, pf [psf]:0 ASCE 7-1 6, Equation 7.3-1 <br />Minimum Roof Snow Load, pm [psf]:0 ASCE 7-1 6, Section 7.3.4 <br />Unobstructed Slippery Surface?Yes ASCE 7-1 6, Section 7.4 <br />Slope Factor Figure:Figure 7-2b ASCE 7-1 6, Section 7.4 <br />Roof Slope Factor, Cs:1 .00 ASCE 7-1 6, Figure 7.4-1 <br />Sloped Roof Snow Load, ps [psf]:0 ASCE 7-1 6, Equation 7.4-1 <br />Design Snow Load, S [psf]:00 <br />2.0 <br />9 <br />0 <br />C <br />Fully Exposed <br />0.9 <br />1 .1 <br />II <br />1 .0 <br />0 <br />0 <br />No <br />Figure 7-2b <br />1 .00 <br />0 <br />Design material <br />weight [psf] <br />2.0 <br />1 .0 <br />3.0 <br />0.5 <br />2.0 <br />6.5 <br />1 5.1 <br />3.0 <br />#VALUE! <br />2022 CRC, Section R324.4.1 .1 <br />Existing <br />941 W Alton Ave - <br />201 7966906/27/23