Manufacturer page.

Ives Continuous Hinges are designed to last the life of the building. The unique design distributes the weight of the door along the entire length of the frame, reducing the high amount of stress normally associated at top of door and frame on traditional hinge applications. Not only does this reduce hinge failure, it also keeps your door in constant alignment, eliminating the chance of door sag. These characteristics make continuous hinges suitable for high use/high traffic doors. Continuous Hinges are available in two styles; aluminum geared steel or stainless steel pin and barrel. Aluminum geared continuous hinges utilize a single gear section for the door side and a separate gear section for the frame side of the door opening. The two are held in place together by a full length cover channel and rotate on a series of bearings. Steel Pin and Barrel continuous hinges share many of the same characteristics of a traditional hinge. Both have a center pin and rolled knuckles. However, a continuous Pin and Barrel hinge stretches along the entire length of the frame. The standard application is one hinge per standard 3 x 7 door leaf. This LCA presents results for this application.