For a flanged beam (T-beam) where the neutral axis lies within the flange (x_u ≤ D_f), the beam is designed as:
Choose the correct answer
A doubly reinforced beam
A simply supported beam with additional steel
A rectangular beam of width b_f (flange width) and depth d
A plain concrete beam
Correct Answer
C. A rectangular beam of width b_f (flange width) and depth d
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When x_u ≤ D_f, the entire compression zone lies within the flange (rectangular compression block within flange). The T-beam behaves as a rectangular beam of width b_f (effective flange width) and effective depth d.
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