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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.

A simply supported beam with dimensions of b = 16 in., h = 28 in., d = 25.5 in., and L = 17 ft supports a uniform service (unfactored) dead load of 2.166667 kips/ft including its own self weight plus a uniform service (unfactored) live load of 0.8 kips/ft. The concrete is normal-weight concrete. The beam is reinforced with 3 No. 6 bars. The concrete strength is 5,800 psi, and the yield strength of the reinforcement is 60,000 psi. Determine the maximum applied bending moment due to the combined service loads (dead plus live), Ma.