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🕑 Reading time: 1 minuteContents:Types of Precast Components in a Building:Precast Beams:Precast Columns:Precast floor slabs:Precast walls:Precast staircases: 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 .... 1987. 7. 1. · There are three types of cast-in-place walls: gravity, cantilever, and counterfort. Each of these walls is constructed with a base slab or footing. The gravity wall relies mostly on its own weight to resist earth pressure. The wall portion (or stem) of a cantilever wall cantilevers from the base slab. The wall is thinner than a gravity wall. Precast concrete is poured into a wooden or steel mold with wire mesh or rebar. This mold may also have prestressed cable, if needed. It is cured in a controlled environment — usually at a plant. Once finished, the precast concrete is transported to a construction site and put into place..