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A beam has dimensions of b = 20 in., h = 12 in., and d = 9.5 in. and is reinforced with 4 No. 7 bars. The concrete strength is 3,800 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 2.622 in., does the reinforcement yield?

A beam has dimensions of b = 14 in., h = 30 in., d’ = 2.5 in., and d = 27.5 in. It is reinforced with 2 No. 5 bars on the compression side and 4 No. 8 bars on the tension side. The concrete strength is 4,000 psi, and the yield strength of the reinforcement is 60,000 psi. For the results given below, determine the strength Mn for this beam.a = 3.569 in. (depth of concrete stress block)Cc = 167.8 kips (compressive force in concrete)Cs = 21.8 kips (compressive force in steel)T = 189.6 kips (tensile force in steel)

A beam is singly reinforced with the reinforcement in two rows. The bottom row contains 10 No. 6 bars at a depth of 22 in. The top row contains 7 No. 6 bars at a depth of 19 in. Determine the effective (centroidal) depth, d, of the steel.

The maximum strain at the extreme concrete compression fiber shall be assumed equal to _______.

The largest column loads are due to factored dead load and live load applied to alternate spans.

Concrete forms must be strong enough to support the wet concrete plus sesmic loads.

More longitudinal reinforcement is required where bending moments have the smallest magnitude

A beam has dimensions of b = 16 in., h = 30 in., and d = 27.5 in. and is reinforced with 3 No. 5 bars. The concrete strength is 9,100 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.

Tributary area extends out from the member in question to the lines of zero shear on either side of the member.

Simply supported beams loaded with only gravity loads develop positive bending moments throughout the span.