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• � ��� ���� C�LCULi�TIONS FOR FREESTi�NDING SIGNS <br /> '�� � �sysea�5.wm <br /> � Foo�ing Design for Freestanding Signs and Flagpole� <br /> Structure Dimensfions & �oa¢ling <br /> Design wind pressure: P= 24.7 psf � <br /> Overturning Safety Factor: f2= 1.5 ...FBc sao�.2.3 � <br /> Sign area 1: A1= 16.0 sq ft ...tributary area 1 for each footer(e.g.sign) <br /> Height of applied force above grade: h1= 5.0 ft ...height of area 1 centroid <br /> Sign area 2: A2 = 4.5 sq ft ...tributary area 2 for each footer(e.g.post) <br /> Height of applied force above grade: h2 = 1.5 ft ...height of area 2 centroid <br /> Overturroirag ti�oment: Mn = P*(A1*h1+A2*h2) <br /> Mn= 2.1 kip-ft <br /> Sq/Rect Footing dimensions: B= 2.58 ft L= 2.58 ft <br /> Footing depth: d = 2.5 ft Soil cover: ds= 0 ft <br /> Superstructure weight: Dr= 200 Ib <br /> Soil cover weight: Ds= 0 Ib ...=100pcf*B*L*ds <br /> Footing weight: Df= 2496 Ib ...=150pcf*B*L*d <br /> Total weight: D= 2696 Ib ...=Dr+Ds+Df <br /> Soal Strength ...FBcrpb�es�so6.z,1819.6 <br /> Soil class: 4.Sand,silty sand,silty gravel� <br /> Lateral bearing strength: Plat= 1`50 psf/ft <br /> Vertical bearing strength: Pbrg= 2000 psf <br /> Check Vertical Soil Bearing Pressures <br /> e= 0.79 ft ..._(P)*(A�*hs+az*hz)/� ... > B/6 <br /> qtoe= 2*D/[3*L*(B/2-e)) ...reaction belowfooterattoe <br /> qtoe= 1405 psf qtoe< Pbrg OIC <br /> Resisting moment due to Dead Load: Mv= D*B/2 <br /> Mv= 3.5 kip-ft <br /> Total Resisting 1�loment: Mtot= Mv/�2 <br /> Mtot= 2.3 kip-ft Mtot>Mn OK <br /> Page 3 <br />