Flat Slab
Flat slab is a reinforced concrete slab supported directly by concrete columns or caps. Flat slab doesn't have beam so it is also called a beam-less slab. Flat slab is defined as one sided or two-sided support system with sheer load of the slab being concentrated on the supporting columns and square slab called drop panels.
Flat slab construction is less popular in recent years because of the limit on economical spans of about 9.5 m for reinforced slabs about 12 m for pre-stressed slabs. A flat slab is a thick plate or shell where stiffness is high.It resists the loads because of stiffness. The thickness of flat is minimum 8 inches or 0.2 m.The plain dimensions of the drop panels are minimum of 1/3 of the span in the direction under consideration. Flat slab are highly versatile elements widely used in construction, providing minimum depth, fast construction and allowing flexible column grids. Flat slab is easier to construct and required less formwork.
Types Of Flat Slab
- Flat slab with drop panel.
- Flat slab with column head.
- Flat slab with drop panel and column head.
- Flat slab without drop panel and column head.
Uses Of Flat Slabs
- It is mostly used in industrial structures.
- It is used in parking garages, ramps, warehouses, hotels etc.
- They are also used where uses of beams are not required.
Advantages Of Flat Slab
- Fast construction.
- Better quality control.
- Required less formworks.
- It is capable of to carry concentrated loads.
- It reduces the overall height of the structure.
- It gives better fire resistant than other floor systems.
- It gives better appearance and better diffusion of light.
- Reduce the moment in the slab by reducing the clear or effective span.
Disadvantages Of Flat Slab
- Higher slab thickness.
- Not suitable for masonry partitions.
- In flat slab larger span is not possible.
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