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Structural Calculations - Internal Silencer <br /> Zephvrhaven Replacement <br /> Critical Loads and Dimensions <br /> Silencer Weight = 450 Ibs <br /> Number of Silencer Mounts = 2 <br /> Silencer Weight per Mount = 225 Ibs <br /> Support Span Length = 23 in <br /> Dist.-Roof to Bottom Support = 15 in <br /> Distance-Mount to Silencer = 4 in <br /> Horizontal Seismic Force = 4.5 Ibs <br /> Veritcal Seismic Force = 6.72 Ibs <br /> Section Properties <br /> Vertical Support <br /> 3/4"- 10 Rods Grade 5 Zinc Plated <br /> 3/4"- 10 Hex Nut Grade 5 Zinc Plated <br /> Nominal Bolt Diameter NO = 0.627 in <br /> Nominal Bolt Area (A b) = 0.442 in' <br /> Single Thread Contact Area = 0.133 in <br /> Threads per Inch (n) = 10 <br /> Width of Nut NJ = 0.625 In <br /> Diameter of Washer (D W) = 1.469 in <br /> Ultimate Tensile Strength (Ftj = 120 ksi <br /> Horizontal Support <br /> C3 x 4.1 Horiz. x C3 x 4.1 Vert. C-Channels A36 Steel <br /> Cross Sectional Area (A) = 2.420 in <br /> Moment of Inertia-x (IX) = 2.700 in <br /> Moment of Inertia-y (l y) = 3.20 in <br /> Radius of Gyration-x (rx) = 1.35 in <br /> Radius of Gyration-y (ry) = 1.30 in <br /> Section Modulus-x (SX) = 2.400 in <br /> Section Modulus-yj (Syl) = 2.700 in <br /> Section Modulus-y2 (Sy2) = 2.000 in <br /> Modulus of Elasticity (E) = 2.9E+04 ksi <br /> Weight of Beam (w) = 0.68 Win <br /> Tensile Ultimate Strength (Ftj = 58 ksi <br /> Tensile Yield Strength (Fty) = 36 ksi <br /> Silencer Mount Calculated Forces <br /> Vertical Support <br /> Weight of Beam = 7.9 Ibs <br /> Silencer Tensile Force = 112.5 Ibs <br /> Vertical Seismic Force = 3.36 Ibs <br /> Rod Tensile Desiqn Force (Art) = 123.7 Ibs <br /> Horizontal Support 10/2/2018 <br /> Shear Forces <br /> Beam Weight Shear (Vb) = 7.9 Ibs <br /> Silencer Weight Shear (V,) = 112.5 Ibs Matthew T. Baldwin, P.E. <br /> Silencer Seismic Shear (VE) = 3.4 Ifdpaes Florida License#64608 <br />