A 115-mm-long beam supports a load of P = 26 N at midspan. The cross section is rectangular with width b = 30 mm and height h = 45 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

The easiest way to test the bond strength of bars in a laboratory is by the pull-out test.

A 124-mm-long beam supports a load of P = 48 N at midspan. The cross section is rectangular with width b = 25 mm and height h = 40 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

For a beam with stirrup hooks, the free end of the bar must extend at least _____ from the hook. Assume b = 16 in., d = 25 in., and that there are four No. 8 longitudinal tension bars and No. 4 stirrups at 10 in. o.c. The stirrup hooks are 135°.

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The shear failure of a slender beam without stirrups is _______.

When the steel ratio, ρw, is small, flexural cracks extend _______ into the beam and open _______ than would be the case with large values of ρw.

Assuming Vs exceeds 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let b1 = 28 in., b2 = 12 in., d1 = 8 in., and d2 = 49 in. There are three No. 8 longitudinal tension bars and No. 3 stirrups at 11 in. o.c.

Assuming Vs does not exceed 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let b1 = 31 in., b2 = 15 in., d1 = 4 in., and d2 = 53 in. There are three No. 7 longitudinal tension bars and No. 5 stirrups at 10 in. o.c.

If the depth of the beam varies, the compressive and tensile forces due to flexure will have vertical components.