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STRUCTURAL CALCULATIONS <br />LATERAL ASSUMPTIONS: <br />Vercal & Lateral Analysis of Hood <br />SEISMIC DESIGN <br />Site Class:D <br />Seismic Design Value:≔SDS 1.04 <br />Component Amplificaon Factor:≔ap 6.5 <br />Response Modificaon Factor:≔Rp 6.5 <br />Importance Factor:≔Ip 1.0 <br />Aachment Point/Roof Height (z/h):≔z 1 <br />Operang Weight:≔Wp 311 lbf <br />Horizontal Force:≔Fp ⋅0.7 <br />⎛ <br />⎝ <br />⋅⋅⋅0.4 ap SDS Ip <br />Rp <br />⎛⎝+1 2 ⎛⎝z⎞⎠⎞⎠ <br />⎞ <br />⎠ <br />Wp <br />Horizontal Force (minimum):≔Fpmin ⋅⋅⋅⋅0.7 0.3 SDS Ip Wp <br />=Fp 271.69 lbf <br />=Fpmin 67.922 lbf <br />Hood to be aached with 7x19 <br />min. aircra cable ea. corner <br />Tension in cable <br />≔Tmax =―――Fp <br />cos ⎛⎝45 °⎞⎠384.23 lbf Use 7x19 min. aircra cables <br />each corner w/ 1/4" bent plate <br />w/ 2-1/2" dia. M.B. <br />Gravity Analysis <br />≔Ph =――Wp <br />2 <br />155.5 lbf Hood load to each side <br />≔Panchor =―Ph <br />4 <br />38.88 lbf Load to each corner <br />Use 2-#10 x 3 1/2" wood <br />screws ea. stud to wall & 1/2" <br />dia. hanger rod w/ 1/4" bent <br />plate w/ 1/2" dia. M.B. ea. rod <br />Allowable Values for Single Shear 1/4" Steel Plate (NDS 11D) <br />≔Fmb 490 lbf <br />≔Fplate =⋅2 Fmb 980 lbf > Panchor <br />2-1/2" M.B. w/ 1/4" PL is <br />San Diego -14288 Danielson Street, Suite # 200, Poway, CA 92064, (858) 679-8989, Fax (858) 679-8959 <br />2841 W MacArthur Blvd <br />Unit# E12/11/2024