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EdssySeaLs CALCULATIONS FOR FREESTANDING SIGNS <br /> earysmis.mm <br /> Cast-in-Place Concrete Anchor Bolts <br /> ACI 318-11,Appendix"D" <br /> Required Strength: <br /> Wind pressure: W= 24.7 psf Tributary area: A= 12.0 sgft <br /> Dead load: D= 0 lb Load eccentricity: e = 3.4 ft <br /> ASCE 7-10,2.3.2: U = (1.2)D+ (1.0)W Mu= 1.01 kip-ft ..._[(1.2)D+(1.0)W]*A*e <br /> Anchor & Concrete Specs: Concrete: fc= 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= 11 in Edge distance: ED= 5.5 in <br /> Qty anchors in group: Q= 2 anchors Anchor group offset: a = 4 in <br /> Anchor Strength: Steel: (�s= 0.75 <br /> Tension: U <_ 0.75 (� Nn Conc, no suppl reinf: 4)c= 0.70 <br /> Steel Strength: _ <br /> -Ase= 7[/4*(da-0.9743/nt)Z Nsa = Ase*futa <br /> Ase= 0.33 in' Nsa = 24.8 kips 4)s*Nsa= 18.6 kips <br /> Concrete Breakout: <br /> Anc= [ED+s+1.5*hef]*[ED+1.5*hef] Anco= 9*hef^2 <br /> Anc= 484 in' Anco= 1089 in <br /> Nb= kc*X*Vfc*hef^1.5 Cracked Concrete: Lpc= 1.0 <br /> Nb= 43.8 kips Cast-in anchors: 4Jcp= 1.0 <br /> Limit=16*A*✓fc*hef^(513) = 43.5kips LPed =0.7+0.3*ED/(1.5*hef) LPed = 0.8 <br /> kc= 24 ...cast-in anchors No eccentricity between anchors: 4Pec= 1.0 <br /> A= 1.0 normal weight concrete <br /> Concrete breakout strength: Ncb= (Anc/Anco)*4Jc*LPcp*LPed*LPec*Nb <br /> Ncb= 15.6 kips 4)c*Ncb= 10.9 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: LPC,p= 1.0 <br /> Concrete pullout strength: Npn= LPc.p*Np <br /> Npn= 15.7 kips 4)c*Npn = 11.0 kips <br /> Concrete Blowout: <br /> Headed Stud/Bolt: Nsb= 160*ED*VAbrg*X*Vf'c <br /> Concrete blowout strength: Nsb= 39.0 kips 4)c*Nsb= 27.3 kips <br /> Critical Anchor Strength, <br /> (�Nn= min(4)s*Nsa,(�c*Ncb,(�c*Npn,(�c*Nsb) 4)Nn= 10.9 kips <br /> (OMn= Q*(�Nn*a <br /> 4)Mn= 7.3 kip-ft Mu < 0.75 4) Mn 1.01 kip-ft < 5.4 kip-ft OK <br /> Page 5 <br />