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ANDERSON & ASSOCIATES CONSULTING ENGINEERS, INC. <br />3902 VILLA SAN JOSE DRIVE, JACKSONVILLE. FLORIDA 32217 (904) 731.7978 Fai (904) 731-7771 <br />12" x 12" TOWER SECTION <br />STRUCTURAL CAPACITY <br />B. Check Capacity of Head Block at Top of Tower <br />P = VerUcal Load <br />Based on above calculations, the Maximum Allowable Adal Load for the Tower will be Controlled by the Weld atthe Chord to Vertical and Horizontal Members, Therefore: <br />Pa:= Fcw·A3 Pa=31.815 kips <br />The Pulley is supported by al' Dia. High Strenglh Steel Pin in a3" Wide x6" Deep Aluminum Channel with 1/4"Thick Flange and 1 /4" Web w/ 1/4" Reinforcing Plate at Pin Hole <br />rHEAD BLOCK <br />] [ 2-AL. (6 (152 mm) <br />r- TRUSS <br />TOWER <br />9/1 <br />Check Bearing of Pin on Channel Web <br />Dp := 1.000 in.tp := 0.500 in.Ap:= Dp·tp·4 Ap=2 in2 <br />Fp := 23 ksi Pp:= Fp·Ap Pp = 46 kips >Pa=31.815 kips O.K.