The winning design, submitted by HOK,[35] featured an eight-panel retractable roof that resembles a pinwheel, and a glass wall that opens with the roof, to allow in fresh air.[36]
The roof design included eight triangular translucent panels, that when open would create the illusion of a birds wings extended. Surrounding the opening of the roof would be a halo video board that will enclose the playing surface, stretching from one of the 10 yard lines to the other and then curving around the end zones to complete the oval.[37]
In January 2015, the Falcons announced the hiring of Daktronics, a South Dakota-based firm, to build the stadium's electronics display. The announced features include a circular 58-foot-by-1,100-foot circular LED board that would ring the opening of the stadium's roof, and would be "three times as large as the current largest single display board in the NFL" installed at EverBank Field in Jacksonville (also built by Daktronics). In addition, the company plans to install more than 20,000 square feet of other LED boards, including field-level advertising boards for soccer games.[38]
The venue will include a 100-yard bar that will stretch the length of the football field in the upper concourse, along with a fantasy football lounge and premium club seating at field level, behind the teams benches.[39]
The mechanical curtains close off the upper bowl from the rest of the stadium for lower-capacity Atlanta United FC matches.
Architect Bill Johnson said the circular opening in the roof was inspired by the Roman Pantheon ("Pantheon" was also the working name for the building design). The roof was designed to be made of a clear, lightweight polymer material that can adjust its opacity to control light, and much of the exterior will be clear polymer or glass to allow views to the outside. The middle concourse and upper bowl were eliminated in the east end zone to allow for an unobstructed view of the Atlanta skyline.[36]
Atlanta United FC General Manager Jim Smith said the design had "soccer in mind from the very beginning", pointing to the retracting lower bowl seats to widen the field, and mechanized curtains that limit the capacity to about 29,000 and makes the stadium feel more intimate.[40]
https://en.m.wikipedia.org/wiki/Mercedes-Benz_Stadium