Precasted Construction

Precast Construction means a panel or members are casted and cured at a location other than its final designated location. The use of reinforced concrete is a relatively recent invention, usually dated to 1848 when jean-Louis Lambot became the first to use it. Joseph Monier, a French gardener, patented a design for reinforced garden tubs in 1868, and later patented reinforced concrete beams and posts for railway and road guardrails.

 

Advantages of Precast Concrete Construction

  • Very rapid speed of erection

  • God quality control

  • Entire building can be precast-walls, floors,beams,etc.

  • Rapid construction on site

  • High quality because of the controlled conditions in the factory

  • Prestressing is easily done which can reduce the size and number of the structural members. 

Disadvantages of Precast Concrete Construction

  •      Very heavy members

  •      Camber in beams and slabs

  •      Very small margin for error

  •      Connections may be difficult

  •      Somewhat limited building design flexibility

  •     Because panel size is limited, precast concrete cannot be used for two-way  structural systems.

  •      Economics of scale demand regularly shaped buildings.

  •      Need for repetition of forms will affect building design.

  •      Joints between panels are often expensive and complicated.

  •      Skilled workmanship is required in the application of the panel on site.

  •      Cranes are required to lift panels.

Popular Uses of Precast Construction

  •       Concrete curtain walls

  •        As an exterior cladding (may include exposed aggregate)

  •        For structural walls

  •        Ability to precast in three dimensions allows precast panels to form parts of mechanical systems