Categories of Precast Components in a Building
Given below, the detailed lists of various types of precast components found in a building developed with precast structure.
Precast Beams: Precast beams are classified as follow :-
Internal beams Here floor loading is almost equal
External beams Here floor loading is largely irregular.
In case of five storied or less structures, each column will generally be constant to the complete height of the building.
In case of structures having in excess of five storys two or more columns are merged jointly.
The core types of precast columns range from:
Edge columns proportionate in one direction.
Internal columns proportionate in all directions.
Corner columns disproportionate at all.
Precast floor slabs: The following major types of slabs are applied in the precast frames:
Hollow cored slab
Double tee slab
Precast walls: Precast concrete walls offer the following functionalities:
As walls or boxes adjacent to staircases and lift shafts.
Walls are categorized as infill or cantilever:
Infill walls are based on coherent combined action with the beam and column frame.
Cantilever walls or boxes operate as deep beams to which the frame is affixed.
Precast staircases: There are three options for precast staircases:
A single precast unit having all the flights and landings
Individual precast flights and landings
Parts of the flights and landings are formed with one piece.