In this case study, we will delve into the process of how A.T. Chadwick was able to stack multiple air handling units in a tight space. These massive units required some creative rigging solutions. But just like melted cheese whiz on a Philly cheesesteak, LGH was the perfect complement to help it all come together. We’ll explore how LGH’s equipment and expertise played a crucial role in getting the job done.

A.T. Chadwick is a mechanical contracting firm that has served the Delaware Valley area for over 50 years. Mike Prendergast, a member of Steamfitters Local 420, and A.T. Chadwick recently undertook the complex project of installing these air handling units in a Philadelphia high-rise. There were two sets of identical units on either end of the building. The trick was to get both sets stacked with very limited headroom. These units also had to be installed before the curtain wall and windows were placed.

While planning for the project, Prendergast relied on LGH’s commitment to safe equipment. He says, “Safety requires pre-task planning of what you’re going to use and then having the documentation to be able to do it. It requires certification for each piece of equipment. LGH has that [certification]”.

To address these challenges, A.T. Chadwick engineered their own trolley beams. They then implemented beam trolley hoists and manual chain hoists from LGH. They strategically placed these trolley beams before constructing the lower units. Using LGH’s equipment, they carefully lifted and trolleyed the upper units into position, setting them onto the lower units (see video below). The heaviest section of this unit was nearly 12,000 pounds. LGH rep Steve Klein was also able to quickly get a manbasket to the jobsite. This allowed the team to safely work on the building’s steep edge.

This case study showcases a successful collaboration between A.T. Chadwick and LGH. A.T. Chadwick’s meticulous planning and LGH’s specialized equipment and expertise were instrumental in overcoming complex rigging challenges. The project was completed under budget and on schedule. Regarding the budget, Prendergast commented, “There is always a money factor. The billing system [LGH] uses is very good. If we ask to use something for a month and then it winds up being a week, it’s never an issue.”

For Prendergast, if a project is planned well, the bulk of the job is already mentally done before you even get to the job site. In his words, “Rigging is a science, and it’s all about experience and planning. LGH and Steve Klein have been a valuable part of our team, providing not only the right equipment but also the certifications and support needed for safe and efficient rigging.”