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Sht # 3 of 3
<br />2019-1529 Solar Journey David Lewis - Battery Backup Date: June 4, 2019
<br /> 9924 Universal Boulevard #224406 Orlando, FL 32819 Tel:1.310.464.1804
<br /> Email: loydwmartin@gmail.com www.loydwmartin.com
<br />Loyd W. Martin Professional Engineer, Inc.
<br />2020-1158 Solar Journey Craig Larsen - Battery Backup Date: June 4, 20202020-1527 Solar Journey Johnathan Valdivia - Battery Backup Date: June 14, 20202020-1697 Sasha Intl Jill Black Zalben - Battery Backup Date: August 3, 20202020-2940 Axis Solar Shook - Battery Backup Date: October 30, 2020
<br />Load per bolt per strut
<br />P = Rx / 2
<br />P = 54.6 lbs / 2 = 27.3 lbs
<br />Determine Applied Loads (cont...)
<br />Fpmax =1.6 SDS Ip Wp =231 lbs
<br />Fpmin =0.3 SDS Ip Wp =43 lbs
<br />Fpmin <Fp <Fpmax OK
<br />F p =0.4 (1.0) (0.83) (174 lbs)
<br />(2.5 / 1)
<br />[1 + 2(1)]x
<br />F p =70 lbs
<br />R1x (33.5") F y (3.75") Fp (16.75") = 0
<br />Check Moment at R2:
<br />R1x = (Fp x 16.75" + Fy x 3.75") / 33.5"
<br />R1x = (1,172.5 lbf-in + 656 lbf-in) / 33.5 in
<br />R1x = 54.6 lbs
<br />Determine allowable load per 5/16" lag screw w/ 3" min. embedment into 2x4 stud per
<br />2018 NDS.
<br />W ' = W x Cd x Ct Table 10.3.1 2018 NDS
<br />where:
<br />W = 266 lbs / in. of embedment per Table 12.2a
<br />Cd = 1.6 per Table 2.3.2 of 2018 NDS
<br />Ct = 1.0 per Table 10.3.4 of 2018 NDS
<br />W ' = 266 lbs/ in. x 3 in. x 1.6 x 1.0 = 1,277 lbs > 27.3 lbs OK
<br />Check for withdrawal of each bolt:
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<br />AG
<br />Exp. 3-31-19
<br />No. C58724 NITRAMW.DYO
<br />REGISTEREDPROFESSIONALENGINEER
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<br />FOETATS
<br />ALIFORNIAICIL
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<br />2321 W St Anne Pl -
<br />201824535/23/2024
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