A beam has dimensions of b = 18 in., h = 28 in., and d = 25.5 in. and is reinforced with 3 No. 6 bars. The concrete strength is 8,800 psi, and the yield strength of the reinforcement is 60,000 psi. Assuming the reinforcement has yielded, determine the depth to the neutral axis, c.

A beam has dimensions of b = 16 in., h = 26 in., and d = 23.5 in. and is reinforced with 3 No. 7 bars. The concrete strength is 7,600 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the nominal moment capacity, Mn, of the beam.

A beam has dimensions of b = 16 in., h = 24 in., and d = 21.5 in. and is reinforced with 5 No. 7 bars. The concrete strength is 3,700 psi, and the yield strength of the reinforcement is 60,000 psi. Assuming the reinforcement has yielded, determine the tensile force T in the reinforcement.

Determine As,min for the following beam given that f’c = 2,750 psi and fy = 60,000 psi.

Simple stains that are commonly used are basic and they stain the cell membrane of the bacteria.

Determine β1 given that f’c = 7,900 psi.

A beam has dimensions of b = 18 in., h = 24 in., and d = 21.5 in. and is reinforced with 2 No. 7 bars. The concrete strength is 3,100 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 1.518027 in. and the strain in the reinforcement is εs = 0.033116, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

A beam has dimensions of b = 14 in., h = 22 in., and d = 19.5 in. and is reinforced with 3 No. 8 bars. The concrete strength is 7,600 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 1.572313 in. and the strain in the reinforcement is εs = 0.021928, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

Determine As,min for the following beam given that f’c = 2,500 psi and fy = 60,000 psi.

A beam has dimensions of b = 18 in., h = 24 in., and d = 21.5 in. and is reinforced with 4 No. 8 bars. The concrete strength is 4,900 psi, and the yield strength of the reinforcement is 60,000 psi. Assuming the reinforcement has yielded, determine the depth to the neutral axis, c.