MimosaMornings
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“Safe Door Locking
What is code-compliant door locking?
Starting with the 2018 edition of NFPA 101, the Code provides two options for locking classroom doors from the inside. While the 2018 edition of the Code originally allowed for one door locking option, the NFPA Standards Council issued a Tentative Interim Agreement (TIA), which—for existing installations only—allows for a second type of door lock/latch combination that continues to deliver a high level of safety to students and staff.
Option One
The hardware for the first option is sometimes called an interconnected latch or lock, and is similar to what you might see in a hotel room. This type of locking mechanism can be used for newly installed doors. It can also be retrofitted on existing doors.
Option Two
The second option enables existing school classroom doors to be retrofitted with secondary hardware, which might include items such as a thumb turn lock. For existing classroom doors only, this option can be used in lieu of single operation hardware, which combines a latch and lock together.
This is one example of the second door locking option; it’s called a dead bolt lock with a thumb turn:
Performance requirements related to these fixed locking devices include the following criteria regardless of the approach taken:
• The door must be lockable from the egress side without having to open it.
• The lock cannot require special knowledge, a key, or tool to engage or disengage from the egress side of the door.
• The two releasing operations, where permitted, must not be required to be performed simultaneously to unlock/unlatch the door.
• The lock must be installed at an acceptable height— between 34 in. to 48 in. above the floor.
• The door must have the ability to be unlocked and opened from outside the classroom with the necessary key or credential.
• The staff must be drilled in the engagement and release of locks.”
Pictures of both door lock options shown in article.