Figure 6-9.-Precast panels being erected by use of crane and spreader bars.

place by cranes, using spreader bars (figure 6-9). Figure 6-10 shows erected panels in final position

CASTING

The casting surface is very important in making with precast concrete panels. In this section, we will cover two common types: earth and concrete. Regardless of which method you use, however, a slab must be cast in a location that will permit easy removal and handling.

Castings can be made directly on the ground cement poured into forms. These "earth" surfaces are

Figure 6-10.-Precast panels in position.