Beams: 2e Two I-beams are bolted together as shown to form a single built-up beam loaded in the vertical direction. Each I-beam has a height of 14.48", moment of inertia with respect to the centroid I, = 1,380 in and a cross-sectional area of 35.3in. For an allowable bending stress o = 20 ksi, find the maximum moment M the built-up beam can sustain.

Fig: 1

Fig: 2