Shear stresses will exist in those parts of a beam where the moment changes from section to section.

Assuming Vs does not exceed 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let b1 = 23 in., b2 = 11 in., d1 = 6 in., and d2 = 53 in. There are three No. 6 longitudinal tension bars and No. 4 stirrups at 10 in. o.c.

Compute φVn for the cross section shown. Assume f’c = 3,500 psi, fyt = 60,000 psi, d = 30 in., w = 20.5 in., t = 6 in., and that there are four No. 6 longitudinal tension bars and No. 5 stirrups at 9 in. o.c.

When a beam is supported by a girder or other beam of essentially the same depth, hanger reinforcement should be provided in the joint.

Assuming Vs does not exceed 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let b = 15 in. and d = 43 in. There are four No. 9 longitudinal tension bars and No. 4 stirrups at 7 in. o.c.

When a beam is supported by a girder or other beam of essentially the same depth, hanger reinforcement should not be provided in the joint.

A 116-mm-long beam supports a load of P = 43 N at midspan. The cross section is rectangular with width b = 29 mm and height h = 45 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

Is the strength reduction factor greater for shear or flexure?

Determine the lightweight modification factor, λ, for a rectangular beam with b = 16 in. and d = 22 in., five galvanized No. 7 Grade 60 tension-reinforcement bars placed in the top of the beam, and No. 4 Grade 40 stirrups located every 8 in. along the span. Assume 8,000-psi normal-weight concrete and a clear cover of 1.5 in.

Aggregate interlock is when aggregate particles on two faces of a crack are interlocked. This encourages sliding of the faces past each other.