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Check attachment of Support to Existing Structure for Wind Uplift - Cont'd <br />Nominal (Unfactored) Uplift at each support = 37.1 psf x 22.5 sq. ft. = 834.75 lbs <br />Note: Section 2.4.1 of ASCE 7-22, Basic Load Combinations for Allowable Stress <br />Design. Note: Applicable Load Combination #5 (D + 0.6W) <br />Design (Factored) Uplift at each support = 0.6 x 834.75 lbs = 501 lbs <br />Load per lag screw = 501 lbs / 2 = 250.5 lbs <br />Determine allowable load per 1/4" lag screw w/ 2.5" embedment into wood below <br />according to the 2024 NDS. <br />W ' = W x Cd x Ct Table 10.3.1 2024 NDS <br />where <br />W = 225 lbs / in. of embedment per Table 12.2a <br />Cd = 1.6 per Table 2.3.2 of 2024 NDS <br />Ct = 1.0 per Table 2.3.3 of 2024 NDS <br />W' = 225 lbs/ in. x 2.5 in. x 1.6 x 1.0 = 900 lbs > 250.5 lbs OK <br />Sht # 5 of 7 <br />2026-0084 Carlsbad Solar 3080 S Harbor Blvd February 19, 2026 <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 />OK. Only 2 screws shall be embedded into 2x framing below. The other 2 <br />screws need to be connected to the sheathing only. Only the screws <br />connected to the framing shall be pre-drilled. Screws connected into <br />plywood sheathing shall NOT be pre-drilled. Install per manufacturer's <br />instructions. Wood screws have been analyzed and determined to be <br />sufficient for this application. <br />Exp. 3-31-19 <br />C L <br />­2187