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During serviceability calculations, it is common to ignore the presence of compression reinforcement.

Concrete covers less than 2 in. may be required for durability, for fire resistance, or in members such as footings.

Compute the maximum bar spacing, s, to control for cracks in a one-way slab with 1.5 in. of clear cover and f​y​ = 62 ksi.

A rectangular beam has a cross section of b = 18 in., h = 24 in., and d = 21.5 in. It is reinforced with five No. 6 Grade 60 bars. The concrete strength is 7,900 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the modulus of rupture of the concrete, fr.

Reinforced concrete structures normally do not crack when carrying service loads.

The fatigue strength of longitudinal bars is greater than that of stirrups.

What does the symbol M​cr ​represent in the transition from I​g​ to I​cr ​equation?

There are universally accepted rules for maximum crack widths.

For the first few years, the time required for a corrosion cell to be established in the reinforcement is a function of concrete crack width.

A rectangular beam has a cross section of b = 14 in., h = 24 in., and d = 21.5 in. It is reinforced with two No. 7 Grade 60 bars. The concrete strength is 7,900 psi (normal weight). The beam has Grade 60 No. 3 stirrups. Determine the gross moment of inertia, Ig, for the beam.