active leaf

active leaf

[′ak·tiv ′lēf]
(building construction)
In a door with two leaves, the leaf which carries the latching or locking mechanism. Also known as active door.

active leaf, active door

In a door having a pair of leaves, that leaf to which the latching or locking mechanism is attached; usually the leaf that is permitted to open first; sometimes both leaves are active.
References in periodicals archive ?
Since it can be fitted into the active leaf, this prevents a collision with the shoot bolt, and therefore rules out any possibility of the door becoming jammed.

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