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.

Precast Columns:

. 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 story's 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:

. Constancy
. 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.

Ref.: theconstructor.org

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.