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Assuming Vs does not exceed 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let d = 47 in., w = 37.5 in., and t = 6 in. There are five No. 8 longitudinal tension bars and No. 3 stirrups at 8 in. o.c.

For a beam with stirrup hooks, the free end of the bar must extend at least _____ from the hook. Assume b1 = 35 in., b2 = 15 in., d1 = 6 in., d2 = 27 in., and that there are three No. 6 longitudinal tension bars and No. 4 stirrups at 9 in. o.c. The stirrup hooks are 90°.

Mis hermanos van a [q10] al fútbol americano.

A simply-supported beam has a 5 kip/ft uniformly-distributed load over the entire 12-ft span. What is the magnitude of the maximum shear force in the beam?

Compute φVn for the cross section shown. Assume f’c = 3,500 psi, fyt = 40,000 psi, b1 = 24 in., b2 = 12 in., d = 28 in., h1 = 5 in., h2 = 19 in., h3 = 9 in., t = 8 in., and that there are six No. 8 longitudinal tension bars and No. 3 stirrups at 9 in. o.c.

Actual bond stresses remain constant between cracks.

In regards to shear cracks, larger aggregate _______.

Use ACI 318-14 Table 25.4.2.2 to determine the development length for the straight tension bars (no hooks) in a rectangular beam with b = 17 in. and d = 22 in., three uncoated No. 7 Grade 60 bars placed in the top of the beam, and No. 3 Grade 60 stirrups located every 10 in. along the span. Assume 6,000-psi lightweight concrete and a clear cover of 2 in.

Which symbol represents the lightweight-concrete-aggregate factor?

Due to Poisson’s ratio, the diameter of the reinforcing bar decreases as it is loaded in tension and both the bond the adhesion and the friction between it and the concrete are lost.