All photos courtesy Westgate/Entrematic
By Richard Sivertsen, CTR
Often specified for commercial and industrial applications, sectional overhead and coiling door systems have long been relatively static as far as the speed of which they open and close. These doors have been able to increase their opening speeds by changing the sprockets in the motors, using wall-mounted jackshafts. This increase amounts to a few more inches-per-second opening speed, maxing out at about 406 mm (16 in.) per second. Conversely, newer ‘high-speed, high-performance’ doors can achieve up to 2540 mm (100 in.) opening speed depending on model, material, and opening size.
Over three decades of industry experience, this author has witnessed an evolution in hardware components and changes in sectional overhead door system product designs—from sections of wood to steel to insulated steel that looks like wood. Most of the changes have been well-received, but the systems have remained as multiple components comprising sections or slats, tracks, shafts, torsion springs, cables, hinges, rollers, ropes, and chains. This means long installation times (in the case of sectional doors), high maintenance costs, and expensive repair costs. Additionally, when hit by vehicles and equipment, these traditional overhead or coiling doors are often costly in terms of replacement parts.
High-speed, high-performance doors can be found in the facility’s interior, separating two rooms with varying temperatures….