The Las Vegas Stadium Roof Cable Net Lift

Design

Equipment used

Hebetec’s involvement in the project required meticulous planning and precision. The company provided 50 H-400 strand jacks and 13 hydraulic units, model PA-4-30, specifically chosen for their capacity to handle the substantial weight and complexity of the cable roof. These tools were instrumental in the pre-assembly of the roof on the ground, setting the stage for the final lift.

Strand jacks in heavy lifting

Strand jacks, a critical component in the lifting process, offer a combination of power and precision. The H-400 model used in this project is particularly noted for its robust performance in heavy lifting operations. The ability of these jacks to manage loads with minimal deviation was crucial in preventing any potential damage to the intricate cable roof structure.

Integration of hydraulic units

The PA-4-30 hydraulic units played a vital role in powering the strand jacks. These units were chosen for their reliability and efficiency, ensuring that the lifting process was smooth and consistent. The synchronization of these units with the overall lifting system was imperative to maintain the integrity of the roof’s structure.

Advanced control systems

A cornerstone of the project’s success was the integration of a computer-controlled PLC system. This system enabled precise control over the lifting process, ensuring that each phase of the lift was executed with exacting accuracy.

Monitoring and tensioning

The design specifications of the cable roof required constant monitoring of the loads applied by the strand jacks. This was accomplished by tensioning two jacks at a time along the vertical/horizontal axis during the final lift, a method that helped maintain balance and distribution of weight across the roof’s surface.

Safety and precision in load management

To avoid exceeding the design loads—which could potentially cause permanent damage to the roof—the PLC control system was configured to monitor and limit the maximum pressure exerted by the jacks. The precision of the pressure sensors, with an accuracy of 0.05 bar ~ 0.5t of a 400 ton jack, was pivotal in maintaining the safety margins specified by the roof’s designers.

Additional technological supports

Aside from the primary lifting mechanisms, the project also utilized a separate laser measuring system with six points to accurately survey the position of the cable net. This additional layer of precision ensured that the roof was aligned correctly throughout the lifting process.

The roof lift at Allegiant Stadium was completed successfully and on schedule, adding another successful stadium roof project to Hebetec’s portfolio.