State any four advantages and four disadvantages of precast concrete.

State any four advantages and four disadvantages of precast concrete.
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1 Answer

Answer :

Advantages:

1. Very rapid speed of erection

2. Good quality control

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

4. Rapid construction on site

5. High quality because of the controlled conditions in the factory

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

 Disadvantages:

1. Very heavy members.

2. Camber in beams and slabs.

3. Very small margin for error.

4. Connections may be difficult.

5. Somewhat limited building design flexibility.

6. Because panel size is limited, precast concrete cannot be used for twoway structural systems.

7. Economics of scale demand regularly shaped buildings.

8. Need for repetition of forms will affect building design.

9. Joints between panels are often expensive and complicated.

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

11. Cranes are required to lift panels.
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