The simply supported wood beam, fabricated by gluing together four wooden boards, carries the three concentrated forces. The working bending and shear stresses for the wood are 1000 psi and 600 psi, respectively. Determine the largest allowable value of the force P in lbs.

4. The simply supported wood beam, fabricated by gluing together four wooden boards, caries the three concentrated forces. The working bending and shear stresses for the wood are 1000 psi and 600 psi, respectively. Determine the largest allowable value of the force P. 0.5 in. + 8 in. + 0.5 in. 2 in. P 2 ft -4 ft +4 ft- 2 ft 6 in. 12 in.

Determine the stress in the steel and in the wood if the beam is subjected to a moment of 750 lb-ft. Esteel=29,000 ksi Ewood=1600 ksi

The joist AB used in housing construction is to be made from 8-in. by 1.5-in. Southern-pine boards. The design loading on each board is placed as shown in the figure below. The allowable bending stress for the wood is Jallow 1.5 and the allowable shear stress is Tallow = 180 psi. Assume that the beam is simply supported from the walls at A and B. (Figure 1) Figure 1 ▾of 1 8 in. 150 lb L 150 lb L 150 lb L 1.5 in. Determine the largest room width I that the boards can span. Express your answer to three significant figures and include the appropriate units. L = 32.0 Submit μA ft My Answers Give Up ? Incorrect; Try Again; 3 attempts remaining

A simply supported wood beam of length L = 10 ft carries a concentrated load P at midspan, as shown. The cross-sectional dimensions of the beam are b=4 in. and h = 7 in. If the allowable shear strength of the wood is 100 psi, determine the maximum load P that may be applied at midspan. Neglect the effects of the beam's self-weight. A Answer: P = i B lb ہراب y b h

2. Two pieces of wood, 2in by 4in, are glued together along the 40 degree joint. Determine the maximum safe axial load P that can be applied if the failure normal stress and the failure shear stress are 250psi and 300psi, respectively. Use a factor of safety equal to 1.2. P P 2 in. 40°

Solve for set B.

E5

A rectangular concrete beam is 12 in. wide and has an effective depth (d) of 18 in. Compression steel is located 2.5 in. from the compression face of the beam and is two No. 8 bars. Calculate the design moment capacity of the beam, for f'c = 4,000 psi and fy = 60,000 psi. Solve for the following tension reinforcement amounts: a b C Three No. 10 bars in one layer Four No. 10 bars in two layers (Two No. 10 bars in each layer) Six No. 9 bars in two layers (Three No. 9 bars in each layer)

Question 22 A concrete floor slab 100 mm thick is cast monolithic with concrete beams 2.0 m on centers. The beams have a span of 4 m and have a web width of 250 mm, an effective depth of 400 mm and overall depth of 500 mm. The tensile reinforcement consists of 6-ϕ32 mm bars in two rows. Use material strengths f’c = 21 MPa and fy = 415 MPa. Calculate the ultimate bending moment strength of the T-beam in kN·m.