A wooden beam (1) is reinforced with steel plates (2) rigidly attached to its top and bottom surfaces, as shown in the f

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A Wooden Beam 1 Is Reinforced With Steel Plates 2 Rigidly Attached To Its Top And Bottom Surfaces As Shown In The F 1 (68.54 KiB) Viewed 37 times

A wooden beam (1) is reinforced with steel plates (2) rigidly attached to its top and bottom surfaces, as shown in the figure. Dimensions of the cross section are b₁ = 6.25 in., d₁ = 10.00 in., b₂ = 3.75 in., and d₂ = 0.40 in. The elastic moduli of the wood and steel are E₁ = 1, 250 ksi and E₂ = 30, 000 ksi, respectively. The allowable bending stresses of the wood and steel are 900 psi and 17000 psi, respectively. Determine the largest concentrated vertical load that can be applied at midspan if a simply supported beam with this cross section spans 17.4 ft. b₁ (1) N P = (2) |(2) b₂ i |d₂ d₁ Td₂ ! lb