That might be a key or access-control credential in the key box or a tool, depending on what type of hardware is on the door. Their method for access on a door with a mechanical lockset can still be used. I have been asked, “What about firefighter access?” The use of an electric strike really doesn’t change anything in regard to firefighter access. There are very limited situations where access upon fire alarm is required (see below regarding stairwell re-entry). I specify fail secure strikes in almost all applications, except when access is required upon fire alarm. And because the lock or panic hardware functions independently of the electric strike, you can exit by turning the lever or pushing the touchpad of the panic hardware, regardless of whether the electric strike is fail safe or fail secure.įor electric strikes on fire-rated doors, fail secure strikes must be used because fail safe strikes do not provide the positive latching and the listings required by NFPA 80–Standard for Fire Doors and Other Opening Protectives. In most cases, a key can be used to retract the latchbolt from the secure side of the door to allow access if a manual override is needed. When the strike is secure, the keeper secures the latchbolt and prevents the door from being opened from the outside. When access is allowed, the keeper is free and the latchbolt can be pulled through the keeper so the door can be opened. The spring-loaded keeper on the electric strike controls the latchbolt of the lock or panic hardware. The lockset or panic hardware still functions as it normally would-free egress is available at all times, except in the case of double-cylinder institutional function locks. For a single door, it mounts in the frame and for a pair, it mounts in the inactive leaf or on a mullion. Most products provide free egress whether they are fail safe or fail secure (see below).Īn electric strike replaces the regular strike for a lockset or panic hardware.Fail safe/fail secure refers to the status of the secure side (key side, outside) of the door.Fail secure products are locked when power is removed.Fail safe products are unlocked when power is removed.Fail Secure – When and Where? By Lori Greene Understanding the basics:
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |