The Constructor

Types of Precast Components in a Building

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Types of Precast Components in a Building:

The figure below shows the building structure with basic precast components. The number of different types of precast components in these structures over the years have become very large. But following figure shows the major types of precast components in a building.

Precast Beams:

There are two main categories of beams:
  1. Internal beams – where floor loading is approximately symmetrical
  2. External beams – where floor loading is predominantly non-symmetrical.

Fig: Internal beams

Fig: External beams

Precast Columns:

For structures of five storeys or less, each column will normally be continuous to the full height of the building. For structures greater than five storeys two or more columns are spliced together. The main typesΒ  of precast columns are:
  1. Edge columns – symmetrical in one direction.
  2. Internal columns – symmetrical in all directions.
  3. Corner columns – not symmetrical at all.

Precast floor slabs:

The main types of slabs are used in the precast frames are:
  1. Hollow cored slab
  1. Double tee slab

Precast walls:

Precast concrete walls serve two functions: Walls may be classified as infill or cantilever:

Precast staircases:

Three options are available for precast staircases:
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