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<br />c' <br /> <br />ROBSON CORPORATION <br />2231 Whitfield Park Loop <br />Sarasota, Fl. 34243 <br /> <br />Sign For: Daugherty Rd. Professional Center <br />38306 Daugherty Rd. <br />Zepherhills, Fl. <br /> <br />DESIGN TO ASCE -7-98 SIMPLIFIED PROCEEDURE <br />WIND DESIGN VELOSITY 130 MPH, 1=0.77, EXPOSURE "C" FACTOR 1.4 <br />DESIGN WIND PRESSURE 29*0.77* 1.4 = 31.3#/SF USE 35#/SF <br />11' x 14'-4" Polystone Sign with extruded alluminum inlay <br /> <br />CALCULATION FOR ATACHMENT OF ALLUMINUM SIGN PORTION TO POLYS TONE <br />STRUCTURE <br /> <br />WIND LOAD 35# S.F. <br /> <br />SIGN LOADING ALUMINUM EXTRUDED FRAME AREA <br /> <br />8.08' X 5'-11" = 48 SF. X 35#SF = 1.680 KIPS <br /> <br />USE MIN. (15) 1/4"DIAM TECH SCREWS TO FASTEN EXTRUDED FRAME TO 1" <br />X 4" X 1/4" ALLUMINUM TUBING CAST IN POLYSTONE SIGN. <br /> <br />SHEAR PER BOLT = 1680#/15 = 112# <br />SHEAR STRESS = .112 /0.25^2x 3.14/4 = 2.284 KSI for 1/4" DIAM <br />TECH SCREW <br />~ KSI >2.284 KSI OK. <br /> <br /> <br />Hendrik Ooms P.E. <br />#17479 <br />Feb. 17, 2005 <br />