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Check attachment of Support to Existing Structure for Wind Uplift - Cont'd <br />Note: Section 2.4.1 of ASCE 7-16, Basic Load Combinations for Allowable Stress <br />Design. Note: Applicable Load Combination #5 (D + 0.6W) <br />Dead Load = 3.0 psf <br />Wind Load = 25.6 psf <br />Design (Factored) Load at each support: <br />3 psf + (0.6 x 25.6 psf) = 18.36 psf <br />where: <br />Y =Distance between 2 lag screws <br />=1" <br />Y'=Moment arm to 1st lag screw <br />=5.5" <br />Moment due to Load =(18.36 psf x 11 sq. ft.) x 5.5" inches <br />=1,111 in-lb <br />Load to lag screw =1,111 in-lb / 1 in <br />=1,111 lbs <br />Determine allowable load per 5/16" lag screw w/ 3.25" embedment into wood below <br />according to the 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 2.3.3 of 2018 NDS <br />W ' = 266 lbs/ in. x 3.25 in. x 1.6 x 1.0 = 1,383 lbs > 1,111 lbs OK <br />Sht # 5 of 7 <br />2025-1634 Calzona Solar Paul Nguyen July 16, 2025 <br />      Loyd W. Martin Professional Engineer, Inc.       <br />9924 Universal Boulevard #224-406 Orlando, FL 32819 Tel:1.310.464.1804 <br /> Email: loydwmartin@gmail.com www.loydwmartin.com <br />Use Support connected to 2x Min. Roof Member w/ <br />(2) 5/16" x 3.5" lag screws per connection minimum. <br />Exp. 3-31-19 <br />C L <br />­2187