Three boards each 50mm thick, are nailed together to form an I-Beam that will be subjected to a vertical shear. We know that maximum allowable shearing force for each nail is 600N. Calculate the maximum allowable shear if the spacing between each nail is 75mm.

A beam cross-section is limited to the size shown. Determine the required area of reinforcement for service load moments Mp = 400 ft-kips and ML = 250 ft-kips. Check crack control requirements f = 4000 psi (normalweight) f, = 60,000 psi d' = 2.5" b= 12" A's d₁= 32"

Figure 1.5 m E -2 m- 3 kN D B -2 m 1 of 1 Identify the zero-force members in the truss. Check all that apply. BE DE CD AB AE BD BC Submit Drouido Foodbook Request Answer

Answer the following for the section at Point D Only Calculate the distributed load "w" that: Will cause the section crack Will cause the reinforcement to yield. Material Properties: F'c = 5000 psi Fy = 60000 psi Es = 29000000 psi Ln = 27 ft L wl₂² 16 wl,² 14 CD L wl,2 vl₁² 10 11 win² 16 h: 28 in A=4 in² b=14 in n d: 25 in