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

A continuous beam’s flexural reinforcement must extend at least _____ from the point where it is no longer needed to resist tension. Assume f’c = 4,000 psi, fyt = 40,000 psi, b = 13 in., d = 17 in., and that there are four No. 7 longitudinal tension bars and No. 3 stirrups at 7 in. o.c. The stirrup hooks are 135°.

A simply-supported beam has a 1 kip/ft uniformly-distributed load over the left half of its 11-ft span. What is the magnitude of the maximum shear force in the beam?

If φVc = 50 kip and Vu = 58 kip, are stirrups required?

The “Innovation Space” module is a place to share your thoughts, ask course-related questions, and share entrepreneur events.

Assuming Vs exceeds 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let d = 57 in., w = 49.5 in., and t = 5 in. There are five No. 9 longitudinal tension bars and No. 3 stirrups at 7 in. o.c.

You are considering a beam design that has dimensions of b = 16 in., h = 28 in., and d = 25.5 in. The beam is singly reinforced with all of the reinforcement in a single row. The concrete strength is 8,800 psi, and the yield strength of the reinforcement is 60,000 psi. What cross-sectional area of reinforcement is needed to achieve a strain in the reinforcement of 0.0075?

The shear failure of a slender beam without stirrups is slow and predictable.

If a beam is supported by a girder of essentially the same depth, the compression fans that form in the supported beam tend to push the bottom off the supporting beam.

For a beam with stirrup hooks, the free end of the bar must extend at least _____ from the hook. Assume b1 = 25 in., b2 = 15 in., d1 = 4 in., d2 = 25 in., and that there are three No. 8 longitudinal tension bars and No. 5 stirrups at 12 in. o.c. The stirrup hooks are 90°.