Laserfiche WebLink
VECTOR STRUCTURAL ENGINEERS <br />JOB NO.:U3594.0103.251 <br />SUBJECT:GRAVITY LOADS <br />® <br />Roof 1 <br />PROJECT:Suzanne Stauduhar Residence <br />GRAVITY LOADS Roof Pitch: 3.8 :12 <br />ROOF DEAD LOAD (D) <br />Increase due to <br />pitch <br />Material weight <br />[psf] <br />Asphalt (Composite) Shingles 1.05 2.0 <br />1/2" Plywood 1.05 1.0 <br />Framing 1.00 3.0 <br />Insulation 1.00 0.5 <br />1/2" Gypsum Clg.1.05 2.0 <br />M, E & Misc 1.00 6.5 <br />Total Existing Roof DL <br />PV Array DL 1.05 3 <br /> DL:1.05 <br />ROOF LIVE LOAD (Lr) <br />Existing Design Roof Live Load [psf]20 ASCE 7-16 Table 4.3-1 <br />Roof Live Load With PV Array [psf]0 <br />SNOW LOAD (S):w/ Solar Array <br />Roof Slope [x:12]:3.8 <br />Roof Slope [°]:18 <br />Ground Snow Load, pg [psf]:50 ASCE 7-16, Section 7.2 <br />Terrain Category:C ASCE 7-16, Table 7.3-1 <br />Exposure of Roof:Fully Exposed ASCE 7-16, Table 7.3-1 <br />Exposure Factor, Ce:0.9 ASCE 7-16, Table 7.3-1 <br />Thermal Factor, Ct:1.1 ASCE 7-16, Table 7.3-2 <br />Risk Category:II ASCE 7-16, Table 1.5-1 <br />Importance Factor, Is:1.0 ASCE 7-16, Table 1.5-2 <br />Flat Roof Snow Load, pf [psf]:35 ASCE 7-16, Equation 7.3-1 <br />Minimum Roof Snow Load, pm [psf]:0 ASCE 7-16, Section 7.3.4 <br />Unobstructed Slippery Surface?Yes ASCE 7-16, Section 7.4 <br />Slope Factor Figure:Figure 7-2b ASCE 7-16, Section 7.4 <br />Roof Slope Factor, Cs:0.87 ASCE 7-16, Figure 7.4-1 <br />Sloped Roof Snow Load, ps [psf]:30 ASCE 7-16, Equation 7.4-1 <br />Design Snow Load, S [psf]:30 <br />1.00 <br />35 <br />Design material <br />weight [psf] <br />2.1 <br />1.0 <br />3.0 <br />0.5 <br />2.1 <br />6.5 <br />15.2 <br />3.1 <br />#VALUE! <br />2020 MRC, Section R324.4.1.1 <br />Existing <br />35 <br />3.8 <br />18 <br />50 <br />C <br />Fully Exposed <br />0.9 <br />1.1 <br />II <br />1.0 <br />35 <br />0 <br />No <br />Figure 7-2b