The double-web girder is construction from two plywood sheets that are secured to wood members at its top and bottom. If each fastener can support 600 lb in single shear, determine the required spacing s of the fasteners needed to support the loading P = 3000 lb. Assume A is pinned and B is a roller. Hint: Think carefully about the number of fasteners transferring stress from one piece of the cross- section to another. 2 in. 2 in. 10 in. A ||-6 in.|| 0.5 in. 0.5 in. 2 in. T2 in. 0000000000000000 000 4 ft- +4 ft B

The lap joint shown is fastened by 4 rivets of ¾ in. diameter. Find the maximum load P that can be applied if the working stress are 14000 psi for shear in the rivet and 18000 psi for bearing in the plate. Assume that the applied load is distributed evenly in the 4 rivets. The plate is 7/8 in. thick and 4 in wide.

Q: The compound wooden beam is connected together by a bolt at B. Assuming that the connections at A,B,C, and D exert only vertical forces on the beam, determine the required diameter of the bolt at B and the required outer diameter of its washers if the allowable tensile stress for the bolt is ot allow = 150 MPa and the allowable bearing stress for the wood is ob allow = 28 MPa. Assume that the %3D hole in the washers has the same diameter as the bolt. 2 kN 3 kN 1.5 kN -2 m--1.5 m--1.5 m--1.5 m--1.5 m- 2 m bolt washer

The lap joint is fastened with four 0.83-in.-diameter rivets. The working stress is 14.55 ksi for the rivets in shear. Find the axial load P (in lb) that can be applied to the joint. Assume that the load is equally distributed among the rivets.

TOR The assembly shown has pin support at E and roller support at V. A steel rod is connected at M and it is perpendicular to arm VM. The pin support at E is under single shear and is also made of steel. Determine the maximum force P that can be applied to the assembly. Show the free body diagram. Show all calculations. Steel Properties: Oallow = 36 ksi Tallow = 22 ksi E = 29,000 ksi M 3/4" diameter steel rod Rigid 5 ft 1" diameter steel pin Single shear E 5 ft 4 ft

The composite bar is firmly attached to unyielding supports. Compute the stress in each material caused by the application of the axial load P = 320 kN.

The lap joint is fastened with four 3/5 in-diameter rivets. The allowable normal stress in the plates is 30 ksi, allowable shearing stress is 24 ksi for the rivets and 28 ksi for the plates in bearing. Find the maximum safe axial load P that can be applied to the joint. Assume that the load is equally distributed among the rivets. Include the necessary FBDs showing the involved internal forces in the exploratory sections. Your solutions are invalidated without the required FBDs.

Three wood boards, each 4 inches wide, are joined by the 4-inch diameter bolt. If the working stresses for wood are 800 psi (pounds per square inch) in tension , find the value of the force P (Ibs) that maybe applied to the joint. I in. 2 in. 1 in. - Fin.

The rigid bar AB of negligible weight is supported by a pin at 0. When the two steel rods are attached to the ends of the bar, there is a gap D= 4 mm between the lower end of the left rod and its pin support at C. Compute the stress in the left rod after its lower end is attached to the support. The cross-sectional areas are 300 mm2 for rod AC and 250 mm2 for rod BD. Use E= 200 GPa for steel. lo/0 0.75 m 1.5m 2 m ANSWER: MPa

For the diagram shown, if the load P = 14 kips, determine: a. the normal force in the member Bar BD b. the shear stress in the pin at B if the diameter of the pin has a diameter = 0.5 in. and is a lap joint in single shear. 6 ft D B (1) 4 ft P