Erecting, Bracing, and Jointing Panels

Erecting is an important step in the construction phase of the project. Before you start the erecting phase, and for increased safety, make sure all your tools, equipment, and braces are in proper working order. All personnel must be well informed and the signalman and crane operator understand and agree on the signals to be used. During the erection of the panels, make sure that the signalman and line handler are not under the panel and that all unnecessary personnel and equipment are away from the lifting area. After the erection is done, make sure that all panels are properly braced and secured before unhooking the lifting cables.

Bracing is an especially important step. After all the work of casting and placing the panels, you want them to stay in place. The following are some steps to take before lifting the panels:

• Install the brace inserts into the panels during casting if possible.
• Install the brace inserts into the floor slab either during pouring or the day before erection.
• Install solid brace anchors before the day of erection.
• If brace anchors must be set during erection, use a method that is fast and accurate.

Although there are several types of bracing, pipe or tubular braces are the most common. They usually have a turnbuckle welded between sections for adjustment. Some braces are also made with telescoping sleeves for greater adaptability. Figure 80 shows tube type braces used to hold up panels. Cable braces are normally used for temporary bracing and for very tall panels. Their flexibility and tendency to stretch make them unsuitable for most projects. Wood bracing is seldom used except for low, small panels or for temporary bracing.

Jointing the panels is simple. Just tie all the panels together, covering the gap between them. You can weld, bolt. Or pour concrete columns or beams. Steps used to tie the panels should be stated in the plans and specs.