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A beam has dimensions of b = 18 in., h = 22 in., and d = 19.5 in. and is reinforced with 3 No. 6 bars. The concrete strength is 3,400 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.

One of the four primary reasons for using compression reinforcement in beams is increased fatigue life.

A beam has dimensions of b = 14 in., h = 28 in., and d = 25.5 in. and is reinforced with 3 No. 6 bars. The concrete strength is 7,300 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the nominal moment capacity, Mn, of the beam.

One of the three basic assumptions in the theory of flexure for reinforce concrete is that the strain in the reinforcement is less than the strain in the concrete at the same level.

A beam has dimensions of b = 14 in., h = 24 in., and d = 21.5 in. and is reinforced with 4 No. 6 bars. The concrete strength is 10,000 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 0.887395 in. and the strain in the reinforcement is εs = 0.044245, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

Isolated beams with unsymmetrical cross sections cannot deflect vertically and laterally at the same time.

A simply supported beam with dimensions of b = 18 in., h = 26 in., d = 23.5 in., and L = 22 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.2 kips/ft and a uniform service (unfactored) live load of 1.5 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.      

Determine β1 given that f’c = 9,400 psi.

15. How is FDG trapped in the cell?

A one-way slab is assumed to act as a series of parallel, independent 1-ft wide strips of slab, continuous over the supporting beams.