CWLP precipitator foundation design

Two electronic precipitators designed to remove particulate matter from flue gas were required at CWLP's Dallman Plant to bring the plant into compliance with EPA emission standards. These units were designed to replace existing units still in use.

Hanson served as structural engineers on the design of temporary and permanent foundations for the precipitators.

Here are the highlights:

• Drilled piers were selected for the foundation support of the 600-ton precipitator based on recommendations from our geotechnical engineers.
• Concrete grade beams were designed and detailed to transfer equipment loads to the drilled piers.
• All of the drilled piers and grade beams were constructed while keeping the existing precipitator units in operation.
• Site access allowed a lateral roll-in for one unit but required a diagonal roll-in for the second unit.
• The precipitator units were successfully built and rolled into final location.
• They were then connected to a new 450-foot-tall concrete smokestack to complete the $22-million-dollar project.
• Hanson's structural and geotechnical engineers assisted CWLP in developing the specifications and quality control for the new smokestack.