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Job name ,Brewer Law Firm PA _.. <br /> Job# 10419C4S <br /> Company: Crazy 4 Signs <br /> Installation location: ;5537Ga►I►I Blvd.,Zephyrh ills FL 33542 j <br /> Section 3107 and 1609 of Florida Building Code 2017 applies: <br /> Chapter 29 of ASCE 7-10(Wind Loads on Other Structures and Building Appurtances)applies: <br /> Type of structure: pylon <br /> Risk Category: II <br /> Ultimate design wind speed,figure C,FBC 2017,section 1609: 140 - mph <br /> Wind stagnation pressure(qz)per 1609.6.3 FBC 2017 34.4 psf <br /> Design wind pressure conversion factor 0.77 <br /> Gust effect factor(G)ASCE 7-10 26.9.1 0.85 <br /> Widest part of sign face(B) 8.00 <br /> Height of sign face(s) 4.00 <br /> Overall height of sign(H) 6.00 <br /> Aspect ratio(B/s) 2.00 <br /> Clearance ratio(s/H) 0.67 <br /> Force Coefficient Cf from Figure 29.4-1,ASCE 7-10 1.4 <br /> Wind pressure(p)multiplied by design wind pressure conversion factor and Cf 31.5 psf <br /> 2.Calculate wind load and turning moments at base by the provisions of the alternate all-heights method <br /> in Section 1609.6. Wind shall be assumed to come from any horizontal direction and <br /> wind pressures shall be assumed to act normal to the surface considered. <br /> Hor Dim Vert Dim=ill Facto Af p F H M(base) <br /> (ft) (ft) (sf) (Ibs) (ft) (ft-Ibs) <br /> 8.00 4.00 1.0 32.0 31.5 1009 4.0� 4035 <br /> 6.0 2.0 1.0 6.0 31.5 189 1.0 189 <br /> 0.0 31.5 0 0 <br /> 0.0 31.5 0 0 <br /> Total 38.0 1198 3.5 4224 <br /> 3.Determine depth of embedment,D in feet <br /> From Table 1806.2,class 4,sandy soil,lateral bearing pressure below grade= 150 psf/ft <br /> Per 1806.3.4 Increase for poles,tabular value time 2 = 300 psf/ft <br /> Assume depth of hole(D): 3.5 ft (Si)= 1050 psf <br /> -number of posts= 1 Load per post(P)= 1198 <br /> -from p.5-81,Structural Engineering Handbook: <br /> D=((1.18*P)/(b*S 1))*(1+(SQRT(1+(1.88*b*S 1*H/P)))) <br /> assume b(ft)= 2 <br /> D(ft)= 3.1 <br /> Alternatively,Section 1807.3.2.1,Equation 18-1 <br /> A=2.34P/S1*b= 1.33 <br /> D=0.5A((1+(1+(4.36h/A))^0.5)= 3.0 feet <br /> 4.Determine required section modulus(in^3)at base <br /> max stress=(P*(H)*12)/section modulus <br /> max stress<allowable stress <br /> for outdoor signs,allowable stress<(0.66)(yield strength) +40112!l11801"1#1 <br /> material A53GrB �.. j 0R��®®® <br /> field strength modulus of rupture) 35000 psi •'�' <br /> required section>(P*(H)*12)/((0.66*ys)) 'S �' F® ®o® <br /> At base,minimum section modulus= 2.19 in^3 _ ® CVO 0044089 ®� <br /> Use existing 5'SCH40 steel pipe, section modulus(Wx)= 5.45 in^3 ~ : <br /> d <br /> References:Structural Engineering Handbook,Gaylord&Gaylord editors, <br /> Fourth edition,McGraw Hill,NY 1997 <br /> ASCE 7 10 <br /> The 6th Edition(2017)of the Florida Building Code <br /> Mechanics of Materials,Beer and Johnston,McGraw Hill,NY 1981 �� L <br /> ICBO Evaluation Report No.4016 ®��p®��➢�'���4� <br /> SBCCI Compliance Report No.9368 <br /> Standard Handbook for Mechanical Engineers,T.Baumeister and <br /> L.S.Marks,editors,Seventh edition,McGraw Hill,NY 1967 sheet 5 of 5 <br /> John J Orlando PE 0044089 <br /> 165 Old Ridge Road <br /> Macon GA 31211 <br /> (478)784-2226 <br />