Beam and Slab Floor System

beam column slab construction
beam column slab construction

Beam and Slab Floor System

This system consists of beams framing into columns and supporting slabs spanning between the beams. It is a very traditional system. The relatively deep beams provide a stiff floor capable of long spans, and able to resist lateral loads. However, the complications of beam formwork, co-ordination of services, and overall depth of floor have led to a decrease in the popularity of this type of floor.

beam column slab construction
beam column slab construction

The traditional reinforced concrete beam-and-slab floor has an economical span ‘L’ of D x 15 for a single span and D x 20 for a multi-span, where D is the depth of the slab plus beam. The depth of slab between the beams can be initially sized using the span-to-depth ratios for a flat plate. Prestressing is not normally used with this system.

Advantages:

  • Traditional effective solution
  • Long spans.

Disadvantages:

  • Penetrations through beams for large ducts difficult to handle
  • Depth of floor
  • Greater floor-to-floor height.