Door Glazing and Rollup Doors

Doors that must resist forced entry should not contain any glazing. Nor should glazing be used beside the strike jamb of any door that needs to be resistant to forced entry. An attacker should not be able to break the glazing, reach inside, unlock the door, and release the latchbolt. If glazing is used, it should be reinforced with expanded steel mesh and monitored with a glass-breakage sensor tied into the alarm system.

Vehicle and storage area door assemblies, usually rollup or sliding doors, also require attention. These doors are particularly vulnerable to attack if they are intended to be unlocked and opened from outside (rather than being positively locked inside to prevent them from being opened from the outside). The vulnerabilities and solutions mentioned earlier for vehicle gates apply to vehicle and storage area door assemblies. Additionally, vehicle and storage area doors should be locked closed using a cremone bolt mounted on the inside of a lower section of a sectional overhead door or on the lowest section of a vertical lift door. The cremone bolt linkage must be rigid steel bar; chain is not acceptable. The cremone bolt must engage the steel track on both sides and must protrude through the track opening far enough to preclude disengaging the bolt on either side by sliding the door to the side.