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0SolarMount Unirac Code-Compliant InstaUation Manual :i'UNIRAC <br />Table 7. ASCE 7 ASD Load Combinations <br />Description Vbrfoble Downtbrce Case I D-,*ce Cose 2 Do»nforce Case 3 Upift unim <br />Dead Load D 1.0 x 1.0 x 1.0 X 0.6 x psf <br />Snow Load S 1.0 x +0.75 x + w <br />Design Wind Load Pnet 1.0 X +0.75 x +1.0 x - psf <br />Total Design Load P psf <br />Note: Table to be filled out or attached for evaluation. <br />Step 2: Determine the Distributed Load on the rail <br />W (pW <br />Determine the Distributed Load, w (plf), by multiplying the <br />module length, B (ft), by the Total Design Load, P (psf) and <br />dividing by two. Use the maximum absolute value of the three <br />downforce cases and the Uplift Case. We assume each module <br />is supported by two rails. <br />w = PB/2 <br />w = Distributed Load (pounds per linear foot, pif) <br />B = Module Length Perpendicular to Rails Ut) <br />P = Total Design Pressure (pounds per square foot, psf) <br />Table 8. L-Foot SolarMount Series Rail Span <br />SM - SolarMount HD - SolarMount Heavy Duty <br />Step 3: Determine Rail Spa,VL-Foot Spacing <br />Using the distributed load, w, from Part II, Step 2, look up the <br />allowable spans, L, for each Unirac rail type, SolarMount (SM) <br />and SolarMount Heavy Duty (HD). <br />The L-Foot SolarMount Series Rail Span Table uses a single <br />L-foot connection to the roof, wall or stand-off. Please refer to <br />the Part III for more installation information. <br />Span Disuibuted Load (poundsmneor foot) <br />m) 20 25 30 40 50 60 80 100 120 140 160 180 200 220 240 260 <br />2 SM SM SM SM SM SM SM SM SM SM SM SM SM SM SM SM <br />2.5 SM SM SM SM SM SM SM SM SM SM SM SM SM R:1* 8$ 4* <br />3 SM SM SM SM SM SM SM SM SM SM SM F..1 *. ·..4 44 :* ti® <br />3.5 SM SM SM SM SM SM SM SM SM SM 7*IF .ie 4,0.40 |4 SM SM SM SM SM SM SM SM SM 3-¥4:9* - · HO tb 1- <br />4.5 SM SM SM SM SM SM SM SM ' 'Uh i.:., 440 1 <br />5 SMSMSMSMSMSM St·1 SM l.j*1 -100 ,. 14*2 1 <br />55 SM SM SM Stl SM SM SM Flihifib HO 1 <br />6 SM SM SM SM SM SM SM ' AiD .JHD <br />6.5 SM SM SM SM SM SM SM ·. #10 HO | <br />7 SM SM SM SM SM SM +ID "HO 7.5 SIt SM SM SM SM SM 21· HE) <br />8 SM SM SM SM SM SM 1 HD __Hal <br />8.5 SM SM SM SM SM L *P- HD <br />9 1 SM SM SM SM F 'AD HD HD <br />9.5 SM SM SM SM * HO HD HD <br />10 SM SM SM -HiS HD HD HD <br />10.5 SM SM SM HD HD HD <br />11 SM SM j HD HD HD HD <br />11.5 SM ' HD HD HD HD HD <br />12 SM HD HD HD HD HD <br />..... <br />11