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 5 No. 8 bars on the tension side. The concrete strength is 2,800 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 7.179 in., determine the force in the compression reinforcement, Cs.

A beam has dimensions of b = 18 in., h = 10 in., and d = 7.5 in. and is reinforced with 5 No. 8 bars. The concrete strength is 5,000 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 3.873 in., does the reinforcement yield?

The strength-reduction factor is multiplied by the factored design moment to account for possible variations in dimensions and material strengths and possible inaccuracies in the strength equations.

_______ stirrups are most commonly used in beams in North American.

If a designer wants to increase the moment capacity of a beam, he/she could reduce the amount of tension reinforcement and add compression reinforcement to keep the section compression-controlled.

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 5 No. 8 bars on the tension side. The concrete strength is 3,700 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 5.588 in., determine the force in the compression reinforcement, Cs.

The largest moments in a continuous beam or a frame occur when some spans are loaded with dead load and others are not. Influence lines are often used to determine which span should and should not be loaded.

The Mueller-Breslau principle is not helpful for structures that will be analyzed via computer software packages.

A beam has dimensions of b = 16 in., h = 28 in., and d = 25.5 in. and is reinforced with 2 No. 8 bars. The concrete strength is 7,000 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the strength Mn for this beam.

It is common to design beams where the b and h values are already known.