The special requirements of special purpose doors and windows may need a custom engineered model to meet your performance demands. With Krieger's years of experience and knowledge, our engineering department can create a product to meet your specifications.
Hinge type on tested door for UL level 1, 2, 3, and 6 is a standard mortise butt hinge. Hinge type on tested door for UL level 4, 5, 7, 8 and 9 is a Continuous Heavy Duty Hinge, prepared on door only, field drilling and tapping on frame by others.
KSP's Bullet Resistant Doors are available with up to 3 hour UL label. We also offer positive pressure tests in accordance with Standards: UL 10C and UBC 7-2 and 7-4. (Standard testing restrictions apply)