Moment Capacity of Rectangular Concrete Beam:

Problem 1) Problem 3.7 (page 80, McCormac and Brown, 9th Ed.) Note: Change the steel to 3 #8 bars, d

= 21 in and h = 24 in.

(a) Find the depth of the compression block, 'a',

(b) Determine the strain in the tensile steel (&) and the reduction factor (ø).

(c) Determine the nominal moment capacity and the design moment capacity (OM).