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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.

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

A beam has dimensions of b = 18 in., h = 26 in., and d = 23.5 in. and is reinforced with 3 No. 8 bars. The concrete strength is 4,300 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the strength Mn for this beam.

Simply supported beams loaded with only gravity loads develop tension cracks along the bottom of the beam.

The textbook author recommends using As’ ≤ 0.5As in doubly reinforced beam sections.

The thickness of concrete cover should be decreased for highly corrosive environments.