Chapter 13, Problem 50RP

two 20 x 100-mm and two 20 x 180 mm boards are glued together as shown to form a 120 x 200 mm box beam. Knowing that the beams are subjected to a vertical shear of 3.625 kN.  Determin the average shearing stress in the glued joint at B

The built-up wooden beam shown is subjected to a vertical shear of 8 kN. Knowing that the nails are spaced longitudinally every 60 mm at A and every 25 mm at B, determine the shearing force in the nails (a) at A, (b) at B. (Given: Ix= 1.504 * 109 mm4)

Two 20 × 100-mm and two 20 × 180-mm boards are glued together as shown to form a 120 × 200-mm box beam. Know that the beam is subjected to a vertical shear of 3.625 kN. Determine the average shearing stress in the glued joint at B.

The built-up timber beam is subjected to a vertical shear of 1200 lb.Knowing that the allowable shearing force in the nails is 75 lb, determine the largest permissible spacing s of the nails.

Three 1 x 18-in. steel plates are bolted to four L6 x 6 x 1 angles to form a beam with the cross section shown. The bolts have a 78-in. diameter and are spaced longitudinally every 5 in. Knowing that the allowable average shearing stress in the bolts is 12 ksi, determine the largest permissible vertical shear in the beam. (Given: Ix= 6123 in4.)

The wooden members A and B are to be joined by plywood splice plates that will be fully glued on the surfaces in contact. As part of the design of the joint, and knowing that the clearance between the ends of the members is to be 8 mm, determine the smallest allowable length L if the average shearing stress in the glue is not to exceed 800 kPa.

Three boards are nailed together to form a beam shown, which is sub-jected to a vertical shear. Knowing that the spacing between the nails is s5 75 mm and that the allowable shearing force in each nail is 400 N, determine the allowable shear when w= 100 mm

An extruded beam has the cross section shown and a uniform wall thickness of 0.20 in. Knowing that a given vertical shear V causes a maximum shearing stress τ= 9 ksi, determine the shearing stress at the four points indicated. assuming that the beam is subjected to a horizontal shear V

The extruded aluminum beam shown has a uniform wall thickness of 1/8 in. Knowing that the vertical shear in the beam is 2 kips, determine the corresponding shearing stress at each of the five points indicated.