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Anchorage of Rooftop Equipment <br />ME Unit Parameters <br />Unit: <br />Unit Length, L =48 in <br />Unit Width,=44 in <br />Top of Unit (Height)=49 in <br />Unit & Curb Weight =455 lbs <br />Max Tension Force: (From Previous Sheet) <br />Tult (ASD)= 202 lbs (ASD) <br />Withdraw Capacity 1/2" dia. Lag Screw =378 lbs/in <br />Penetration =3.0 <br />Number of Lag Screws (long. side)=1 <br />Capacity of Lag Screws =1134 lbs OK <br />Max Shear Force: (From Previous Sheet) <br />Vult (ASD)= 121 lbs (ASD) <br />Shear Capacity 1/2" dia. Lag Screw =290 lbs <br />Number of Lag Screws (total)=1 <br />Capacity of Lag Screws =290 lbs OK <br />Combined Lateral & Withdrawal Loading <br />P (penetration)=3.0 in <br />Z = sqrt(V2 + T2)= 236 lbs <br />α (angle) = tan-1 (T/V) = 59 deg <br />Wp = W1 x P = = 1134 lbs <br />Wp' = CD x Wp = 1.6 x 1701#= 1814 lbs <br />Z (single shear)=290 lbs <br />Z' = CD x Z = 1.6 x 290# = 464 lbs <br />Zα' = Wp' x Z' / Wp'cos(α)2 + Z'sin(α)2 = 1027 lbs OK <br />AC-2 <br />H:\2024\240417\4_Engineering\240417.Equip Anchorage <br />3900 Cover Street, Long Beach, CA 90808 562.985.3200 P 562.985.1011 F www.mhpse.com <br />9.0 <br />OCT 2024