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<br /> <br />ARRAY ANCHOR ATTACHMENT CALCULATION: <br />Withdrawal Load = 316 lb (See PanelClaw Construction Document, PC - 16) <br />Shear Load = 359 lb (See PanelClaw Construction Document, PC - 16) <br />Use: OMG Powergrip Plus w/ 8 numbers of #14 HD Screws (See Attached Test Report) <br />Tensile Capacity = (2013 lb / 3) = 671 lb <br />Shear Capacity = (1077 lb / 3) = 359 lb <br />Withdrawal Check D/C = (316 lb /671 lb) = 0.47 < 1 Hence Okay. <br />Shear Check D/C = (359 lb / 359 lb) = 1 Hence Okay. <br />Hence the anchor is safe in shear and tension. <br /> <br /> <br />EXISTING ROOF DECK CAPACITY CHECK: <br />Verco HSB-36 1 ½” x 22 GA. Roof deck [From As-Built Structural Drawing by the Client, Sheet S3.0] <br />Governing Uplift Force = 316 lbs [See PanelClaw Construction Document Sheet, PC-16] <br />Deck Span = 6’-6” <br />Deck Max. Bending Moment = 316 lbs x 6.5’ /4 = 514 lb-ft <br />Section Modulus = 0.188 in^3 [See Attached B Deck Report] <br />Yield strength = 50 ksi [See Attached B Deck Report] <br />Bending Capacity M = (0.188 in^3 x 50 ksi x1000) / (1.5 x 12”) = 522.2 lb-ft > 514 lb-ft <br />Hence OK <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br /> <br />4 <br />B