Institutional (school) locksmiths know the types and functions of locks that are installed. Other locksmiths not specializing in education facilities may not be aware of these special function locks. Even in the era of bit keyed locks, specific locks were made for schools and institutions. This...
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Institutional (school) locksmiths know the types and functions of locks that are installed. Other locksmiths not specializing in education facilities may not be aware of these special function locks. Even in the era of bit keyed locks, specific locks were made for schools and institutions. This article is dedicated to the typical school, college and university of the 21st century.
The classroom functions place the control in hands of the instructors and staff. Only they can lock and unlock the room. Students cannot lock their instructors or anyone else out, but they can always exit.
Special functions dedicated to the educational facilities are, and always have been available in Unit and Mono locks, Cylindrical, Mortise, Tubular and Mortise Dead Locks. They are made in Grade's 1, 2 and 3. Depending on the installation, Grade 1, heavy duty, is found on most major institutions. Grade 2 on the other hand, may be found in schools if there was a cost factor involved. They may also be used on doors to control the outside knob for access into and out of an area.
Grade 3 is residential, so the question arises, “Why is the classroom function offered?” A possible answer to that would be a storeroom or large walk-in closet within the residence that the owner would leave open at times and locked when necessary. The inside is always free to exit without the mechanism to lock or unlock the outside knob.
Classroom locks are offered by United States as well as other manufacturers. Some locks have been private labeled. The original government numbering system used letters after their numbers, using the letter “S” suffix to indicate the classroom function. A number of manufacturers still use these letters after their product number as a designation of the function. The American Institute of Standards (ANSI) specifies a standard “E” or “F” with a number to designate door lock functions.
ANSI's basic function for the standard bore-in locks is F05. (Figure 1) To operate the lock, the key locks or unlocks the outside knob. The inside knob has no mechanism to lock or unlock. Locks come standard with deadlocking latch bolts.
Full mortise lock sets have a F05 designation and share the same function as the bored-in lock family. With mortise locks, there are additional functions to enhance more secure variations to the F05, including a F06 latch holdback feature.
ANSI F05 CLASSROOM Function (Figure 2): Key outside locks and unlocks outside lever/knob. Inside lever/knob always free to exit.
ANSI F06 CLASSROOM With Holdback (Figure 2): Key outside locks and unlocks outside lever/knob. Latch bolt can also be held withdrawn by outside key. When latch bolt is not in the holdback position, inside lever/knob always free to exit.
There are a number of Classroom auxiliary locks with different variations that will be discussed at the end of this article.
SECURITY INTRUDER CLASSROOM LOCKS
Over the past decade, tragic events in our schools have mandated higher standards than the ones in use over the past 100 years. Several years ago the industry introduced a new series of Classroom functions using the words “Security Intruder Locks.” These locks are only offered in Grade 1. Several manufacturers offer both the Grade 1 heavy duty and Extra Heavy Duty Institutional Hardware. In addition, some manufacturers offer slightly modified versions of the Security Intruder functions that may or may not carry an ANSI rating. Not all manufacturers in this category make all the functions. Therefore when keying systems are a factor, in order to apply a specific function that is not made by the primary product in the building, a secondary keying system may have to be installed. It is extremely important for everyone involved in any school project to study and maintain this information for service and installation.