Design of T-beam

Problem 2) Use problem 5-22 (McCormac and Brown, 9th Ed., page 147) but:

• change the live load to 400 lbf/ft² and use the dimensions shown in figure below

# 10

10'0"

18"

100

# 10

18"

# 10

18"

A

21.5" 307

4.5"

100

(a) Calculate the maximum factored moment (note: remember to include the self weight of slab

and beams)

(b) Determine the effective flange width

(c) Check if a

(d) Determine the minimum steel area required using trial-and-error approach. Assume moment

arm for initial trial equal to 0.9d. Limit the selection of reinforcing steel to # 10 bar only and

determine the number of bars required to carry the factored moment.

(e) Check strain in tensile steel (e,) and determine reduction factor ($).

(f) Select minimum bar size to be used as stirrup. Provide minimum side cover if the concrete is not

exposed to weather or ground contact and check the spacing of the # 10 bars. Check the bottom

cover of the beam against minimum cover requirement. Sketch and label your final design.

(g) Calculate the actual design moment capacity, M, and verify that it is greater than M.