Precast concrete is used extensively in building structures, for
e.g. structural frames, floors and roofs, claddings etc. Use of
Precast Concrete in frames: There are two main types of precast
building frame. The structural frame consists of slabs, beams
and columns. Structural frames are mainly used for offices, car
parks and retail developments. The cross-wall frame consists of
floor slabs and solid walls. It is used mainly for hotels,
schools and hospitals. Use of Precast Concrete for Floors: Each
year the industry makes about 5 million square meters of precast
floor slabs. That’s equivalent in area to 714 football pitches.
The main types of floors are shown in figure below: The reason
for their success is: - Fast construction - Economic production
- Standardized cross=section - Good strength to weight ratio -
Smooth surface finishes Use of Precast concrete in Cladding:
Precast concrete cladding may be used as a structural element.
However, it is used more frequently as a non-structural
decorative façade.