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Structural Calculations - Roof <br /> Zephyrhaven Replacement <br /> Critical Loads & Pressures <br /> Wind Pressures Snow Pressure Seismic Load <br /> Downforce 1.528 psf = 0.01 psi 0 psf = 0.000 psi Horizontal = 30lbs <br /> Uplift -121.7 psf = -0.84 psi Vertical Factor = 0.03 <br /> Roof Live Load <br /> Downforce 30.0 psf = 0.2083 psi or 300 Ibs Concentrated Load <br /> Pressures&loads are the numerical maximums to be analyzed for shear,bending tension,and compression. <br /> Section Properties <br /> 3"x4"x1/4" Extruded Aluminum Tubing-6061-T6 <br /> Cross Sectional Area (A) = 3.25 in <br /> Moment of Inertia-x (/x) = 7.07 in <br /> Moment of Inertia-y (/,) = 4.44 in <br /> Section Modulus-x (Sx) = 3.53 in3 <br /> Section Modulus-y (Sy) = 2.96 i n 3 <br /> Radius of Gyration-x (rx) = 1.47 in <br /> Radius of Gyration-y (ry) = 1.17 in <br /> Polar Moment of Inertia (J) = 8.18 in <br /> Weight of Beam (w) = 0.32 Ibs/in <br /> Modulus of Elasticity (E) = 1.01E+04 ksi <br /> Safety Factor (nu) = 1.95 <br /> Safety Factor (ny) = 1.65 <br /> Coefficient (kt) = 1.00 <br /> Welded Tensile Ultimate Strength (FN) = 24 ksi Non-Welded = 42 ksi <br /> Welded Tensile Yield Strength (Fty) = 15 ksi Non-Welded = 35 ksi <br /> Welded Compressive Yield Strengi(F�y) = 15 ksi Non-Welded = 35 ksi <br /> Welded Shear Ultimate Strength (Fs„) = 15 ksi Non-Welded = 27 ksi <br /> Roof Frame Calculations <br /> Member Designed for Forces Acting on the Weak Axis <br /> Interior Beam Critical Member Dimensions <br /> Interior Beam Length (L d = 71 in <br /> Load Spanned Width (Wd = 24 in <br /> Silencer Mounting Locations <br /> Distance from end to: <br /> Silencer Mount# 1 (ms9) = 24 in <br /> Silencer Mount# 2 (ms2) = 47 in <br /> 10/2/2018 <br /> Matthew T. Baldwin, P.E. <br /> Florida License#64608 <br /> Page 4-1 <br />