Disadvantages

There are certain aspects that discourage the use of precast concrete units under the following conditions:

1. Special equipment are needed for handling, transportation and erection. This is of particular concern for large-size units like beams, slabs, columns, etc.
2. Cost of construction may increase due to the employment of skilled labour and due to mechanized construction.
3. There is more chance of damage to the precast units while loading, transporting and erecting.
4. Combining different units and making them function as per the design is really difficult, particularly if different types of units are involved.
5. Future modification to the building constructed using precast units is difficult.