Alternate span loading is the common loading pattern for determining maximum midspan positive moments due to live load.

A beam has dimensions of b = 18 in., h = 24 in., and d = 21.5 in. and is reinforced with 4 No. 8 bars. The concrete strength is 5,800 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 2.136579 in. and the strain in the reinforcement is εs = 0.019943, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

A beam has dimensions of b = 16 in., h = 28 in., and d = 25.5 in. and is reinforced with 3 No. 8 bars. The concrete strength is 6,400 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the strength Mn for this beam.

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.

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.

Which symbol represents the assumed maximum useable compression strain in concrete?

A simply supported beam with dimensions of b = 12 in., h = 28 in., d = 25.5 in., and L = 15 ft supports a uniform service (unfactored) dead load consisting of its own weight plus 1.8 kips/ft and a uniform service (unfactored) live load of 0.9 kips/ft. The concrete is normal-weight concrete. Determine the moment due to the factored loads, Mu.      

Adjacent span loading is the common loading pattern for determining maximum negative moments at supports due to live load.

To delay buckling of compression steel in a beam, _______.

A beam is singly reinforced with the reinforcement in two rows. The bottom row contains 10 No. 7 bars at a depth of 16 in. The top row contains 8 No. 7 bars at a depth of 12.5 in. Determine the effective (centroidal) depth, d, of the steel.