A beam has dimensions of b = 14 in., h = 24 in., and d = 21.5 in. and is reinforced with 5 No. 7 bars. The concrete strength is 5,500 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the nominal moment capacity, Mn, of the beam.

How many taxonomic categories did Linneaus develop? In the “easy method” that I give for learning the categories (the mnemonic device), what is the alternate name for “Kingdom” (starts with “K”)?    

José [lc].

If there is compressive reinforcement in a beam, you must assume in your calculations that this steel will yield.

For economic reasons, reinforced concrete should be designed to be _______.

A beam has dimensions of b = 16 in., h = 26 in., and d = 23.5 in. and is reinforced with 2 No. 7 bars. The concrete strength is 6,400 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.

A beam is singly reinforced with the reinforcement in two rows. The bottom row contains 6 No. 7 bars at a depth of 22 in. The top row contains 4 No. 6 bars at a depth of 16.5 in. Determine the effective (centroidal) depth, d, of the steel.

A beam has dimensions of b = 18 in., h = 28 in., and d = 25.5 in. and is reinforced with 2 No. 5 bars. The concrete strength is 5,500 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the compressive stress block is a = 0.442068 in. and the strain in the reinforcement is εs = 0.131114, determine the strength φMn for this beam. Assume the transverse reinforcement is not spirals.

A beam has dimensions of b = 18 in., h = 30 in., and d = 27.5 in. and is reinforced with 2 No. 8 bars. The concrete strength is 5,800 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth to the neutral surface is c = 1.405644 in., determine the strain in the reinforcement.

The most effective way of changing the nominal flexural strength of a beam would generally be by _______.