AT ATLAS Induced Draft Counterflow Cooling Towers
5
Rigging Basin Sections
Lifting devices are located along the inside edges of the bottom section for lifting and final positioning purposes as shown in Figure 2.
The hook of the crane must be a minimum dimension of 26’ above the top of the basin section to prevent undue strain on the lifting
devices. If applicable, see “Extended Lifts” on page 15 for proper arrangement.
Bolt the bottom sections to the steel support before rigging the top sections.
Figure 2 - Rigging Unit Bottom Section - 1 Basin
26' (7.9m)
Joining Bottom Sections
Each 24’ x 30’ ATLAS basin is composed of two (2) 12’ x 30’ sections, connected by three (3) flume boxes for equalization.
In addition to the equalizer flumes, these units are provided with horizontal drip channels and vertical splash guards to keep water
from splashing out from between the cells.
The equalizer flume boxes are shipped loose for field assembly. It is important to connect the equalizer flumes to balance the water
level in the basins for proper pump suction operation. The procedures that follow should be performed in sequence.
ATLAS Flume Box Installation Instructions:
1. Rig one of the bottom sections of the cooling tower. Bolt to steel support.
2. One face of the flume box is provided with 3/8” (10mm) welded bolts. Clean the mating flume opening on the rigged bottom
section and apply a layer of sealer tape on this surface, centered between the hole centers and the outside edge. Remove
paper backing strip from sealer tape.
3. Align the bolt holes in the rigged bottom section with the welded 3/8” (10mm) bolts on the flume box.
4. Install 3/8” (10mm) nuts and washers on every bolt around the flume opening and tighten.
