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<br />Calculatiofls for ART KRAFT SIGN CO. <br />"SUllbeit Health Care Center" 15' 3" OAH sign foundation and pole size calculation <br />To be installed at 7350 Dairy Road, Zephyrills, FL <br /> <br />Definition of terms: <br />M=larger sign dimension (ft), N=smaller sign dimension (ft) <br />Cf=Force Coefficient, Vp=Velocity Pressure (#/sf) <br />Vf=Velocity pressure corrected by force coefficient (#/sf) <br />F=Wind Load (#), I-:l=Height where an equiv. point force is applied (ft) <br />Mw=Turning moment at base (1t#), P=Load per post (#) <br />b=Width of concrete embedment (ft), S1 =allowable soil stress (psf) <br />D=Depth of concrete embedment (ft) <br /> <br />1 _ Determine wind load and turning moment <br />_ 94 Rev. to Southern Standard Building Code <br />Design wind velocity (V) = 110 mph <br />M/N= 1.1 Cf= 1.2 <br />At base: <br />Height Hor Dim Vert Dim Ft^2 Vp(#/sf) C1 Vf(#/sf) F(#) <br /> (ft) (ft) <br />0-15 0.0 25 1,2 30 0 <br />0-15 0.0 25 . 1,2 30 0 <br />0-15 4 8 32.0 25 1.2 30 960 <br />15-20 13.5 7 94.5 26.5 1.2 31,8 3005 <br />20-25 0.0 29.5 1,2 35.4 0 <br />25-30 0.0 31 1.2 37.2 0 <br />30-35 0.0 31 1.2 37.2 0 <br />Total 126.5 3965 <br /> <br />2. Determine depth of embedment, D in feet <br />_ design is based on poor soil with an allowable soil stress (S 1) <br />of 2000 pst, Le, loose fine and coarse sand <br />_ number of posts~ 2 Load per post (P)= <br />- from p. 5-81, Structural Engineering Handbook: <br />D=((1.18"'P}/(b*S1 }}*(1 +(SQRT(1 +(1.88*b*S1*H/P}}}) <br />assume b (ft)= 2 <br />D (ft) = 4,2 <br /> <br />H(ft) Mw(ft#} <br /> <br />o <br />o <br />4 3840 <br />12 36061 <br />o <br />o <br />o <br />10.1 39901 <br /> <br />1983 <br /> <br />3, Determine required section modulus in inches cubed d J <br />_ from p. 5-82, Structural Engineering Handbook ~f) /\ A IJ ~. ~.... <br />max stress::: (P*(H+O.34D)*12)/section modulus ~ C;./ I~ <br />max stress < allowable stress <br />allowable stress < 0.66(yield strength) B ('1./77 <br />- from the Southern Building Code, p.526, for outdoor signs <br />allowable stress < (O.66)(1.33)(yield strength) <br />for ASTM A37 steel, yield strength = 36000psi <br />required section> (P*H*12)/31600 <br />Minimum section modulus::: 7.5 in^3 <br />Use 8" diameter SCH40 steel pipe, sect. modulus = 16.8 in^3 <br /> <br />References: Structural Engineering Handbook, Gaylord&Gaylord editors, <br />Eigth edition, McGraw Hill, NY 1997 <br />Ryerson Stock List and Data Book, 1992-93 edition <br />Southern Standard Building Code, 1994 Rev. <br />Mechanics of Materials, Beer and JOhnston. McGraw Hill, NY 1981 <br /> <br />John J. Orlando, P.E. No. 0044089 <br />State ot Florida <br /> <br />sheet 2 of 2 <br />