8 Precast Construction Overview

A system where building components are produced in a factory and then transported to the construction site for assembly.

A precast system with high flexibility, where components are custom-made for each project, but may be less efficient due to the lack of standardization.

A system where components are pre-designed and standardized, making production efficient, but limiting flexibility.

A type of precast system using large wall and floor panels to create buildings, suitable for multi-story structures.

A precast system utilizing pre-cast frames as the load-bearing structure, designed for efficient and quick assembly.

A type of precast system where slabs and columns are combined with pre-cast walls, creating a complete structure.

A precast system that combines elements from different systems like large panels and frames, providing flexibility and efficiency.

A precast system designed for a specific project and its elements are customized, leading to higher production efficiency.

Precast frames can be built using linear components or spatial beam-column assemblies.

Linear elements are generally preferred for precast frames due to their ease of forming, handling, and erection compared to spatial elements.

In precast frames, beam-column connections are often hinged, allowing the beams to be positioned on corbels for shear transfer.

Precast frames can also use rigid beam-column connections, ensuring continuity of reinforcement through the joint.

Slab-column systems rely on shear walls for lateral load resistance and columns and slabs for gravity loads.

The lift-slab system uses precast columns and slabs, where slabs are lifted and positioned on top of columns.

Prestressed slab-column systems involve precast slabs poured on the ground and lifted to the final position.

Plant-cast precast concrete elements are manufactured in a factory and transported to the construction site.

A long, narrow, rectangular concrete element used in construction for spanning openings, supporting loads, and creating floors or roofs.

A specialized type of reinforcing steel that is stretched tight before concrete is poured, adding strength to the concrete element.

A process where concrete is poured over pre-stretched steel strands, resulting in a very strong, lightweight concrete element.

A process where concrete is poured over steel bars that are permanently embedded in the concrete to provide strength.

Concrete elements made in a factory and then transported to the building site for assembly. These elements can be beams, columns, walls or slabs.

A manufacturing method where precast concrete elements are constructed on long, horizontal beds called casting beds.

A type of concrete used in making hollow core planks. It's designed to flow easily and fill the molds for the planks.

Concrete elements that are used in the vertical support of a building, along with wall panels and beams.

The process of stretching steel strands within concrete elements to increase their structural strength and efficiency.

Precast concrete structural elements designed to support floors and roofs. Their depth determines their spanning ability, with deeper elements spanning greater distances.

Precast concrete elements used to support slabs, typically with projecting reinforcing bars to connect to concrete cast on-site.

Precast concrete elements designed to carry vertical loads and support beam and slab elements, often reinforced with steel to withstand bending forces during handling and erection.

Precast concrete wall panels used to create walls, available in solid, hollow, or sandwich designs with insulation cores.

A technique used to lift and place precast concrete elements during construction, employing a vacuum device for precise control and safety.

The process of using precast concrete elements for framing systems, resulting in faster construction with reduced weather dependence.

Reinforcement in concrete structures used to resist shear forces. They are made of conventional steel bars bent into specific shapes.

Metal plates that provide a surface for transferring loads between precast concrete elements. They are typically cast into the ends of columns or beams.

Rods that connect precast concrete elements, embedded in the concrete and providing a strong connection between elements.

A strong connection between precast concrete elements like columns and beams, made by filling the space between them with grout. It provides structural support and prevents fire damage.

A connection between precast concrete beams and columns, using precast corbels as supports. Steel angles are welded to metal plates embedded in the beams and columns, and the joint is grouted solid.

A connection between precast concrete slabs and beams, using bearing pads and steel bars. The joint is grouted solid to provide a strong, stable connection.

A layer of concrete poured on top of precast concrete slabs to provide additional strength, fire resistance, and improve acoustic isolation.