Design of Beams: Learn about Singly Reinforced Beams and Doubly Reinforced Beams here!

Last Updated on May 15, 2025
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What is Design of Beams?

Design of Beams FAQs

H-beams are considered to be the strongest as compared to other shapes of beams.

The maximum area of tension reinforcement shall not exceed 4% of the gross cross-sectional area of the beam.

Maximum shear reinforcement spacing measured along the axis of the member shall not exceed 0.75d for vertical stirrups and d for inclined stirrups at 45 degrees. The spacing must never be greater than 300 mm.

Codes do not provide requirements related to the width-depth ratio of reinforced concrete beams. However, as a thumb rule, it is preferable to use a depth that is two and a half to three times the width of the beam. It is more cost-effective to use deep and narrow sections for long-span beams.

The standard size in a residential building is 9’’ x 12’’ or 225 mm x 300 mm (According to IS codes). The minimum RCC beam size should not be less than 9’’ x 9’’ or 225mm x 225mm with a slab thickness of 125mm.

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