The Mercedes Benz Stadium is 2,000,000 SF and 30 stories high, with a 14.5 acre roof. It can seat up to 75,000 spectators for the Super Bowl and has a 63,000 sq. ft. score board. Morrison Hershfield provided building envelope commissioning (BECx) services including design recommendations and on-site construction review. The unique “petal roof” closing mechanism (similar to a camera shutter) was made possible due to the light-weight ETFE roofing materials. Traditional roofing materials would have added too much weight for the moving trusses to function properly. Additionally, the translucent nature of the ETFE material allows enough light to reach the field for natural grass to grow. (Mercedes Benz Stadium – Atlanta, GA)
The 1.5 million SF home of the Vikings includes 65,400 seats, with room to accommodate 72,000 for the Super Bowl. The lightweight, asymmetrical ETFE roof lets in natural light while protecting players and fans from the elements. Morrison Hershfield provided building envelope consulting services to the general contractor including reviews of the ETFE roofing, cladding, glazing and waterproofing systems. The integrated approach allowed for one field technician to review multiple systems concurrently, reducing time and costs. (U.S. Bank Stadium – Minneapolis, MN)
The Red Wing’s Little Caesars Arena is 650,000 sq. ft. and eight stories. The ETFE-topped concourse connects the arena to adjacent offices and shops. Morrison Hershfield provided building envelope consulting services including design assistance, shop drawing reviews, and construction reviews of the enclosure assemblies. Interfacing with the ownership, design, and construction teams in a seamless manner, we provided clear direction that helped streamline any modifications needed. (Little Caesars Arena– Detroit, MI)
ETFE is quickly gaining popularity in North America. It has been used on innovative and prominent projects, including the U.S. Bank Stadium in Minneapolis and Mercedes Benz Stadium in Atlanta.
The material has many attractive attributes, combining design practicality and structural cost saving with an aesthetic appeal to broaden creative possibilities.
What is ETFE?
ETFE (ethylene tetrafluoroethylene) is a fluorocarbon-based polymer originally developed by the aeronautics industry for its high resistance to corrosion and temperature variations. Architects have discovered ETFE as a viable building material and are leveraging its light weight and unique transparency properties.
Transparency in Performance
The material allows for up to 95% transparency and the passing of ultraviolet light, which is responsible for the promotion of photosynthesis and plant growth, making it an ideal material for stadia. ETFE is also customizable. The amount of solar shading and transparency can be adjusted by modifying the translucency, density, number of layers, and design patterns.
ETFE systems use air-filled pneumatic panels, which significantly reduces the roofing load, and in turn cost, of the structural support systems necessary compared to traditional roofing, especially for large-span roofs.
ETFE allows owners and architects to create stunning buildings that provide greater natural light while reducing structural loads. Project teams see an increased benefit in the early engagement of ETFE Specialists to provide detailed design input. In construction, specialists support the team through a diligent review of the installation.
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Read the Latest From Our Blog on ETFE
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