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EdsySeaLs CALCULATIONS FOR FREESTANDING SIGNS <br /> •..... easyseals.com <br /> Cast-In- 'lace Concrete Anchor Bolts <br /> ACI 318-11,Appendix"D" <br /> Required Strength: <br /> Wind pressure: W= 24.7 psf Tributary area: A= 6.4 sqft <br /> Dead load: D= 0 lb Load eccentricity: e = 7.4 ft <br /> ASCE 7-10,2.3.2: U'= (1.2)D+ (1.0)W Mu= 1.17 kip-ft ..._[(1.2)D+(1.0)W]*A*e <br /> Anchor & Concrete Specs: Concrete: Pc= 2500 psi <br /> Anchor bolt size: 3/4" da= 0.75 in nt= 10 threads/in <br /> Anchor material: SAE Grade 2/A307 futa = 74 ksi <br /> Embedment: hef= 12 in Edge distance: ED= 6.5 in <br /> Qty anchors in group: Q= 2 anchors Anchor group offset: a = 5 in <br /> Anchor Strength: Steel: (�s= 0.75 <br /> Tension: U <_ 0.75 (� Nn Conc, no suppl reinf: #= 0.70 <br /> Steel Strength: <br /> Ase= n/4*(da-0.9743/nt)2 Nsa = Ase*futa <br /> Ase= 0.33 in Nsa = 24.8 kips (0s*Nsa= 18.6 kips <br /> Concrete Breakout: <br /> Anc= [ED+s+1.5*hef]*[ED+1.5*hef] Anco= 9*hefA2 <br /> Anc= 600 in' Anco= 1296 in <br /> Nb= kc*X*Vf'c*hefA1.5 Cracked Concrete: 4pc= 1.0 <br /> Nb= 49.9 kips Cast-in anchors: Wcp= 1.0 <br /> Limit=16*a*Uf'c*hefA(5/3) = 50.3 kips LPed =0.7+0.3*ED/(1.5*hef) LUed = 0.81 <br /> kc= 24 ...cast-in anchors No eccentricity between anchors: LPec= 1.0 <br /> X= 1.0 ...normal weight concrete <br /> Concrete breakout strength: Ncb= (Anc/Anco)*LPc*LPcp*LPed*Wec*Nb <br /> Ncb= 18.7 kips 4�c*Ncb= 13.1 kips <br /> Concrete Pullout: <br /> Headed Stud/ Bolt: Head diameter: dh = 1 in <br /> Np= 8*Abrg*f'c Abrg= 0.8 in <br /> Np= 15.7 kips Cracked Concrete: 4Uc,p= 1.0 <br /> Concrete pullout strength: Npn= LPc.p*Np <br /> Npn = 15.7 kips coc*Npn= 11.0 kips <br /> Concrete Blowout: <br /> Headed Stud/ Bolt: i Nsb= 160*ED*VAbrg*X*df'c <br /> Concrete blowout strength: Nsb= 46.1 kips 4)c*Nsb= 32.3 kips <br /> Critical Anchor Strength: <br /> (�Nn = min(4)s*Nsa,4)c*Ncb,4)c*Npn,(�c*Nsb) 4)Nn = 11.6 kips <br /> 4)Mn = Q*(�Nn*a <br /> 4)Mn= 9.2 kip-ft Mu <_ 0.75 4) Mn 1.17 kip-ft < 6.9 kip-ft OK <br /> Page 5 <br />