Civil Engineering MCQAE Level Civil Engineering
A rectangular RCC beam has b=300 mm, effective depth=400 mm and tension steel=1.0% of bd. Steel area is
RCCOriginal practiceMEDIUM
Choose the correct answer
A
2400 mm²
B
1200 mm²
C
120000 mm²
D
600 mm²
Correct Answer
B. 1200 mm²
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Tensile reinforcement area Ast = (pt / 100) * b * d, where pt = steel percentage (%), b = beam width (mm), d = effective depth (mm). IS 456 limits: minimum pt = 0.85*100/fy (for beams); maximum pt = 4% for beams. Ast governs moment capacity and must satisfy both strength and serviceability requirements. Ast = 1.0/100 × b × d = 1200 mm².
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