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<br />G.) Shear Capacity of Reinforced Masonry Bond Beam: <br /> <br />Fv (max) = fm^I/2 < or = 50 psi <br /> <br />(ACI 530, 7.5.2.2) <br /> <br />fin^ 1/2 = <br /> <br />42.4 pSI <br /> <br />Therefore, fv = 1.333 x Fv(max) = 56.4 pSI <br /> <br />(ACI 530, 5.3.2) <br /> <br />Shear force (V) = uplift - dead load per ft. x 1/2 column spacing, <br /> <br />v = ( U - D ) x L/2 <br /> <br />Also, <br /> <br />fv = V I bjd <br /> <br />(ACI 530, 7.5.2.1) <br /> <br />Therefore, <br /> <br />L = fv x bjd x 2 I (U - D) =1 38.2 1ft <br /> <br />H.) Check Bond Beam Deflection: <br /> <br />Maximum Bond Bm. Deflection = 0.75 In <br /> <br />(Two mortar joints) (ACI 530, 5.6: D+W) <br /> <br />Cracked Moment of Inertia: <br /> <br />Ic = b(kd)^3 I 3 + (nAs) (d - kd)^2 <br /> <br />(Reinf Msnry Des., Dickey) <br /> <br />Ic= 81.2 <br /> <br />Delta = w x L ^4 I 384 E Ie <br /> <br />(Continuous) <br /> <br />Therefore, L = (Delta x 384 x E x Ic I (U-D))^1/4 = 145.1 In <br /> <br />or <br /> <br />12.1 1ft. <br /> <br />Page 13 <br /> <br />