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U.S. Bank Stadium In Minnesota Has Interesting Technology

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With construction now complete, U.S. Bank Stadium will soon open its doors.

Those doors might not be what the stadium is most known for, but maybe they should be.

Since the beginning, all the way from design through construction, the stadium’s clear, see-through roof has been the headliner grabbing all the attention.

Which has caused the stadium’s doors to sort of slip under the radar. Which is kind of incredible.

Because on any other stadium, they’d be the star.

Passing through a door like this is like nothing else you’ve ever experienced,” Berg said.

Doors are about transition. You go from a bright sunny day like today, to a dark interior. [But] that’s not what these doors are like. You don’t know whether you’re inside or outside.

“It’s the absolute absence of contrast. That confuses you.

Rotating on hydraulic pistons, they are the five largest pivoting glass doors in the world, 55 feet wide and ranging from 75 to 95 feet high, consisting of 30,000 square feet of glass from Owatonna, attached to door frames manufactured in Tennessee, and weighing, altogether, 40,000 tons.

The Vikings initially thought the NFL might need to create a new policy for their first-in-the-league doors, similar to the one for opening and closing retractable roofs.

But the NFL informed the Vikings in May that its existing retractable roof and wall policy applies: The Vikings must make a decision — doors open or doors closed — at least 90 minutes before kickoff.

As for the factors that will go into that decision? The Vikings are planning to do some testing to determine what happens when the doors are open. Any wind, or other impact?

I think they might have an effect,” Berg said. “Certainly the architects know that there’s a ventilation effect, to having the doors open.

“I suppose there’s a chance that that might affect the game, [for example] the flight of a field goal kick.”

If that ever happens, no doubt the doors would surpass the roof as the U.S. Bank Stadium’s most famous feature.

Well the doors are a little underrated,” Berg said.

Berg’s book is available for pre-order right now from the Minnesota Historical Society Press, or the Vikings website.

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