(c) Bending-moment diagramFIGURE 3- Record the properties of the beam section
Refer to the AISC Manual, and record the following properties for the Wl 8 x 60; d =
18.25 in (463.550 mm); bf= 7.56 in (192.024 mm); tf= 0.695 in (17.653 mm); / = 984 in^4
(40.957 cm^4 ); S= 107.8 in^3 (1766.84 cm^3 ). - Select a trial section
Apply the approximation A = 1.05(5- SWF)ldWF, where A = area of one cover plate, in^2
(cm^2 ); S = section modulus required, in^3 (cm^3 ); SWF = section modulus of wide-flange
shape, in
3
(cm
3
); dwp = depth of wide-flange shape, in (mm). Then A = [1.05(170.2 -
107.8)]/18.25 = 3.59 in^2 (23.163 cm^2 ).
Try 10 x 3/ 8 in (254.0 x 9.5 mm) plates with.4 - 3.75 in^2 (24.195 cm^2 ). Since the beam
flange is 7.5 in (190.50 mm) wide, ample space is available to accommodate the welds.
(b) Shear diagram(a) Force diagram