workspace while navigating the misaligned building columns. The second goal required us to custom engineer a “coped” end truck on the bridge cranes to improve the standard hook height and clearance of the underhung bridge. We implemented another “cope” in the runway system at the point where the two buildings were joined. Neither of these design features are a standard for us but they helped us squeeze every inch of height out of the system to maximize the hook height. To meet the demand of the third goal. PWI implemented a custom quad end truck design for the bridge to minimize the loading across the building’s roof structure. Had we used a standard dual or triple end truck design, the loading would have been at the center of the roof span. This would have required a ton of additional steel from the building manufacturer, driving up the cost. The additional design challenge of the quad end truck was that we needed to make sure that the bridge was perfectly straight across all of the runway beams to minimize the wear and tear on the end truck drive components. We designed the bridge cranes with a bolt together truss so that they were easily transported to the jobsite for installation and maintained a perfectly straight bridge beam to reduce the risk of wear.
OCH: Did PWI collaborate with any other companies on this project? BH: Yes, a general contractor and the building supplier. PWI had to work with both companies to ensure that the building was adequately reinforced for the crane loads in the correct locations. This meant that our planning for runway mounting bracket locations had to be executed perfectly during the design and installation phases.
OCH: In your opinion, what made this project so unique and rewarding to PWI? BH: Underhung motorized cranes of this size have become a rare occurrence for us. It was fun for us to utilize a new design concept to achieve so many conflicting goals.
PWI's tagline is Smart Solutions Delivered. When
projects like these come around, we are passionate about helping customers accomplish their unique goals and flexing our teams capabilities.
ochmagazine.com | Fall 2024 53
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