Question

2. A beam section is made by nailing together two 2X8 boards (actual size - 1.s inches by 7:25 inches, a board dimension exceeds 6 inches, the actual dimension is inch less) and two 2x4 boards (actual ize 1.5 inches by 3.5 inches) in the configuration shown to the right. when 1.50 75 7.25 A 12-foot long beam with the section described above is used in a deck as illustrated below. The ends can be considered to be simply supported, and the load transferred from each member resting on the top of the beam is shown in the idealized beam diagram at the bottom of the page 3.50 1.50 Find the maximum magnitudes of the tensile and compressive stresses in the beam. Beam 125 lb 250 lb 250 lb 250 lb 250 lb 250 lb 125 lb (ft) 0 2. 4. 10. 12.

Answer 1

upper most fibers will be im 270 3. 056 maỵ 132.2 ox132.2 956 Ksi(tension)