High-speed rolling door
The Spiral HZ high-performance rolling door is engineered to withstand Category 4 hurricane-force winds. It features rigid, double-walled aluminum slats with integral rubber weather seals between each panel and reinforced hinges combined with galvanized-steel side columns. The door opens at speeds of up to 60 ips and is available in standard sizes up to 16×21 feet.
Rytec Corp. : www.rytecdoors.com