What is Hidden Beam?

A hidden beam is an RCC (Reinforced Cement Concrete) beam that is integrated within the slab. It has the same depth as the slab itself. This beam serves the purpose of transferring loads, such as from a brick wall, without compromising the height of the floor.


Why is it Used?

The concept of a hidden beam stems from flat slabs. Its primary function is to transfer concentrated loads from walls onto the slab, which is then further directed to the supporting beam and column.


Where is it Used in Buildings?

Concealed beams find their application in suspended slabs of considerable thickness, especially when the span of the slab is substantial. They are also used when architectural considerations prohibit the use of deeper beams. They are typically placed between living and dining areas, creating a clean and level ceiling surface for a polished appearance.


Designing a Hidden Beam

Designing a concealed beam follows similar principles to regular beams, with one key difference – its depth matches that of the slab. To accommodate this restriction, the ratio of reinforcement and width needs adjustment. Once cast, the concealed beam seamlessly blends into the structure.


Purpose of Hidden Beam

Concealed beams serve various essential purposes:

  • Distributing concentrated wall loads on the slab
  • Allowing for a greater span in slab usage
  • Meeting architectural aesthetic requirements
  • Breaking up extensive slab panels into manageable sizes
  • Achieving desired floor heights
  • Facilitating brickwork over the slab
  • Providing a convenient path for ductwork installation

Advantages of Hidden Beams

Hidden beams offer several advantages:

  • Space-saving, as they don’t compromise floor height clearance
  • Economical, reducing costs related to formwork, labor, and materials
  • Provide a smooth ceiling surface for a pleasing interior finish
  • Simplify installation of electromechanical ductwork

Disadvantages of Hidden Beam

While concealed beams have their benefits, there are some drawbacks to consider:

  • Limited flexibility due to high reinforcement ratios
  • Potential spanning issues, especially at column connections
  • Inadequate for handling lateral loads