Simplified Design Of — Steel Structures Pdf

The W12x16 fails deflection (0.8" > 0.67"). Jump to the next size. Final Selection: W12x19 (Ix = 130 in⁴). Deflection is now 0.63 inches. Success.

$$ M_{max} = \frac{wL^2}{8} = \frac{2 \times (20)^2}{8} = 100 \text{ kip-ft} $$ (Convert to kip-in: 100 * 12 = 1,200 kip-in) simplified design of steel structures pdf

$$ Z_{req} = \frac{M_{max}}{\phi F_y} = \frac{1,200 \text{ kip-in}}{0.9 \times 50 \text{ ksi}} = 26.7 \text{ in}^3 $$ The W12x16 fails deflection (0