Enough space should be provided between the reinforcement to allow a vibrator to reach the bottom of the form in at least one place along the beam length.

A beam has dimensions of b = 18 in., h = 22 in., and d = 19.5 in. and is reinforced with 5 No. 7 bars. The concrete strength is 7,600 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.

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

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

Most concrete design codes specify a maximum usable compressive strain at which the nominal moment strength of the section is to be calculated. For ACI 318, this maximum usable strain value is 0.003.

The elastic beam theory is used in the design of reinforced concrete beams.

A beam has dimensions of b = 16 in., h = 24 in., and d = 21.5 in. and is reinforced with 2 No. 6 bars. The concrete strength is 9,100 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the strength Mn for this beam.

Determine As,min for the following beam given that f’c = 7,250 psi and fy = 60,000 psi.

In analysis, there are many possible answers. One determines the beam strength given several factors such as concrete strength, cross section, reinforcement size, location, and yield strength.

A’s represents the cross sectional area of reinforcement on the tension side of the beam, and AS represents the cross sectional area of reinforcement on the compression side of the beam.