Determine the bar-spacing factor, cb, for a simply supported rectangular beam with b = 24 in. and No. 3 stirrups. This beam has three No. 7 bars as longitudinal reinforcement. The clear cover is 1.5 in.

Determine the transverse reinforcement index, Ktr, for a rectangular beam with b = 18 in. and d = 24 in., five galvanized No. 7 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 3 Grade 40 stirrups located every 8 in. along the span. Assume 4,000-psi lightweight concrete and a clear cover of 1.5 in.

If the bond between concrete and steel in a beam disappears, the steel will pull out of the concrete and cause the beam to fail.

Determine the epoxy modification factor, ψe, for a rectangular beam with b = 16 in. and d = 20 in., five uncoated No. 6 Grade 60 tension-reinforcement bars placed in the bottom of the beam, and No. 4 Grade 60 stirrups located every 6 in. along the span. Assume 6,000-psi lightweight concrete and a clear cover of 1.5 in.

Hooks are used to provide additional anchorage when there is insufficient _______ available to develop a bar.

Bond stress values may vary from point to point between cracks.

A rectangular beam has a cross section of b = 16 in., h = 24 in., and d = 21.5 in. It is reinforced with five No. 5 Grade 60 bars. The concrete strength is 9,400 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the neutral axis location of the cracked beam (measured from the top of the beam).

In a pull-out test, a concrete cylinder containing the bar is placed on a stiff plate and a jack is used to pull the bar out of the cylinder.

Per ACI 318 standards (Section 25.4.2.3 in 2014 edition) and the homework, when calculating the development length of deformed bars, what is the maximum value (cb + Ktr)/db should be taken as?

The development lengths will be the same whether a reinforcing bar is in compression or tension.