Point Pickup Methods

Once the concrete has reached the desired strength, the panels are ready to be lifted. The strength of the inserts is governed by the strength of the concrete.

CAUTION

An early lift may result in cracking the panel, pulling out the insert, or total concrete failure. Taking the time to wait until the concrete has reached its full strength prevents problems and minimizes the risk of injury.

There are several pickup methods. The following are just some of the basics. Before using these methods on a job, make sure that you check plans and specs to see if these are stated there. Figure 86 shows four different pickup methods: 2, 2-2, 4-4, and 2-2-2.

The 2-point pickup is the simplest method, particularly for smaller panels. Fasten the pickup cables or chains directly from the crane hook or spreader bar to two pickup points on or near the top the precast panel.

The 2-2 point pickup is a better method and is more commonly used. Variations of the 2-2 are the 4-4 and 2-2-2, or combinations of pickup points as designated in the job site specifications. These methods use a combination of spreader bars, sheaves, and equal length cables. The main purpose is to distribute the lifting stress throughout the panel during erection. Remember, the cables must be long enough to allow ample clearance between the top of the panel and the sheaves or spreader bar.