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THOMAS <br /> SIGN &AWNING COMPANY, INC. <br /> Sample Calculations <br /> Geometry - Letters qh = 0.00256*Kz*Kzt*kd*VultZ <br /> Channel Letter Length = 2 ft q_face = p = qh * (GCp-GCpi) <br /> Channel Letter Height = 4 ft T = 0.6*p*Sign Height*Sign Length <br /> Channel Letter Depth = 0.42 ft V = 0.6*p*Sign Height*Sign Depth <br /> Dist. to Top of Letters = < 29 ft M = Force * Eccentricity <br /> Letter Weight = 4 psf (Ta/Tn) + (Va/Vn) <= 1.0 <br /> Location on Building = Wall <br /> Zone = Edge <br /> Wind Loads <br /> Wind Speed = 140 mph <br /> Expsoure Factor = B <br /> Kzt = 1.00 GCp = 1.40 <br /> Kz = 0.70 GCpi = 0.18 <br /> Kd = 0.85 (GCp-GCpi) = 1.58 <br /> qh = 29.85 psf q_face = 47.2 psf <br /> Anchor Design <br /> Load Source Ecc (in) Tension Shear Moment <br /> (Ibs) (Ibs) (Ib-in) <br /> Wind Suction 0 226 0 0 <br /> Wind Shear 3 0 48 119 <br /> Letter Weight 3 0 32 80 <br /> TOTAL = 226 57 199 <br /> No. of Anchors = 5 Ta = 336 Ibs <br /> Tension/Anchor = 49 Ibs Va = 38 Ibs <br /> Shear/Anchor = 11 Ibs Interaction = 0.45 < 1 OKAY <br /> Substrate = Wood_Backing <br /> Anchor Type = Liberty_Bolt Channel Letters to be mounted to using 3/8 inch <br /> Diameter = 3/8 in diameter anchors per attached drawing anchor <br /> schedule as dictated by substrate. <br /> TSA Sales Acknowledgment #: 94618 <br /> Page 2 of 2 <br />