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� �� � ��� CALCULATIONS FOR FREESTANDING SIGNS <br /> easysealsmm <br /> Cast-on- 'lace Concrete Anchor Bolts <br /> ACI 318-11,Appendix"D" <br /> Required Strength: <br /> Wind pressure: W= 24.7 psf Tributary area: A= 70.7 sqft <br /> Dead load: D= 0 lb Load eccentricity: e= 4.2 ft <br /> ASCE 7-10,2.3.2: U = (1.2)D+(1.0)W MU= 7.27 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= 18 in Edge distance: ED= 6.855 in <br /> Qty anchors in group: Q= 2 anchors Anchor group offset: a = 14.25 in <br /> Anchor Strength: Steel: (�s= 0.75 <br /> Tension: U <_ 0.75 (� Nn Conc, no suppl reinf: (�c= 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 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= 1146 in' Anco= 2916 in' <br /> Nb= kc*A*Vf'c*hef^1.5 Cracked Concrete: 4pc= 1.0 <br /> Nb= 91.6 kips Cast-in anchors: LUcp= 1.0 <br /> Limit=16*A*✓f'c*hef^(513) = 98.9kips 4Jed =0.7+0.3*ED/(1.5*hef) t4Jed= 0.78 <br /> kc= 24 ...cast-in anchors No eccentricity between anchors: 4Jec= 1.0 <br /> A= 1.0 ...normal weight concrete <br /> Concrete breakout strength: Ncb= (Anc/Anco)*Wc*LPcp*LUed*Wec*Nb <br /> Ncb= 28.0 kips cWNcb= 19.6 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 (oc*Npn= 11.0 kips <br /> Concrete Blowout: <br /> Headed Stud/Bolt: Nsb= 160*ED*VAbrg*1L*Vf'c <br /> Concrete blowout strength: Nsb= 48.6 kips coc*Nsb= 34.0 kips <br /> Critical Anchor Strength: <br /> (�Nn = min((�s*Nsa,(�s*Ncb,(Oc*Npn,4)c*Nsb) 4�Nn= 11.0 kips <br /> (�Mn = Q*(�Nn*a <br /> 4)Mn= 26.1 kip-ft Mu _< 0.75 4) Mn 7.27 kip-ft < 19.6 kip-ft OK <br /> Page 5 <br />