Laserfiche WebLink
EdsySeaLs CALCULATIONS FOR FREESTANDING SIGNS <br /> w.. easyseals.com <br /> Footing Design for Freestanding Signs and Flagpoles <br /> Structure Dimensions & Loading <br /> Design wind pressure: P= 24.7 psf <br /> Overturning Safety Factor: Q= 1.5 ...FBC 1807.2.3 <br /> Sign area 1: A1= 12.0 sq ft ...tributary area 1 for each Tooter(e.g.sign) <br /> Height of applied force above grade: h1= 3.4 ft ...height of area 1 centroid <br /> Sign area 2: A2= 0.0 sq ft ...tributary area 2 for each footer(e.g.post) <br /> Height of applied force above grade: h2= 0.0 ft ...height of area 2 centroid <br /> Overturning Moment: Mn= P*(A1*h1+A2*h2) <br /> Mn= 1.0 kip-ft. <br /> Sq/Rect Footing dimensions: B= 1.25 ft L= 4 ft <br /> Footing depth: d= 3 ft Soil cover: ds= 0 ft <br /> Superstructure weight: Dr= 200 lb <br /> Soil cover weight: Ds= 0 lb =100pcf*B*L*ds <br /> Footing weight: Df= 2250 lb ...=150pcf*B*L*d <br /> Total weight: D= 2450 lb ...=Dr+Ds+Df <br /> Soil Strength ...FBC Tables 1806.2,1819.6 <br /> Soil class: 4.Sand, silty sand, silty gravel <br /> Lateral bearing strength: Plat= 150 psf/ft <br /> Vertical bearing strength: Pbrg= 2000 psf <br /> Check Lateral Soil Bearing Pressures (Empirical Method) ...FBC Sect 18o7.3.2.1 <br /> Unconstrained (No rigid floor or pavement at ground surface) <br /> Allowable lateral soil bearing pressure at 1/3 depth: <br /> S1= 2*Plat* (d+ds)/3 <br /> S1= 300 psf <br /> Total applied lateral load: Ptot= 0.30 kips <br /> Equiv ht of applied load: heq = 3.40 ft <br /> As= 2.34*Ptot/(S1*L) <br /> As= 0.6 ft <br /> dreq= As/2 * [ 1+V(1+4.36*heq/As) ] <br /> dreq = 1.78 ft dreq <d OK <br /> Page 3 <br />