Allegiant Stadium in Las Vegas
- Las Vegas, Nevada, United States
- 32,516 m²
- Cable, Steel
Manica Architecture, HNTB
Allegiant Stadium in Las Vegas, Nevada, is the new home of NFL’s Raiders, and is also the future home of UNLV football.
The new, 65,000-seater stadium has raised the bar when it comes to design, particularly with its fully enclosed roof, which consists of 107 ETFE cushions, covering 350,000ft2 (32,516m2), and the engineering of a structural cable net system required to support this unique and intelligent roofing system.
The stadium’s initial design concept of futuristic visual approaches combined with an ETFE roof had never been constructed before on this scale, but it was a non-negotiable specification the design team had to deliver on, as the Raiders organization is famous for saying they would always play home games on natural turf.
This presented a big challenge as the fans and players inside the stadium needed to be shielded from the hot desert sun. Therefore, light transparency needed to be controlled with a very unique ETFE system. However, with the amount of tinting to achieve this it would hinder the ideal amount of light allowed in required to grow and maintain the natural turf. As a result, the configuration of this ETFE system would have done the opposite. In the end, the decision was made to have a retractable turf field, to ensure the comfort of the fans in the hot Las Vegas climate and to keep the turf healthy.
Vector Foiltec recognized from the beginning of the project that the success and implementation of the design of the roof was going to be dependent upon creative collaboration, and flawless execution of all of the contractors involved on this large-scale design build project. Vector Foiltec’s design and delivery was divided into five phases starting with design assist, where the overall concept, cushion sizes, and structural system were defined. This was followed by the design process where its highly experienced in-house team turned the architect’s vision into a feasible solution.
The fabrication of the ETFE materials took place in Bremen, Germany, and the steel was fabricated near Venice, Italy. To mitigate any delivery risk, both the ETFE and steel system were delivered six months ahead of their scheduled installation (these were considerations taken pre-Covid). This allowed Vector Foiltec to use the pre-installation phase to start coordinating logistics and building mechanisms.
All of these components and pre-planning, were essential to on-time completion of the ETFE roof, which was an exceptional feat during such a unprecedented time in history. Time is always of the essence in stadium construction. Aside from the normal constraints, the installation of the ETFE roof began just before the Covid-19 pandemic was shutting down project sites throughout North America, and continued as uncertainties grew and new challenges were placed to keep everyone on site safe.
Vector Foiltec leads in innovation and development of ETFE technology, assisting clients with their building envelopes for projects ranging from small atria enclosures and office skylights to large-scale landmark buildings, shopping malls and stadia.
Pictures © Michael Clemens, Las Vegas Raiders