Multiple-family dwelling means a building or portion thereof designed for occupancy by two or more families living independently of each other, including hotels, motels, apartments, duplexes and townhomes. Panic hardware means a latching device on a door assembly for use when emergency access is required due to fire or other threat to life safety. Devices designed so that they will facilitate the safe egress of people in case of an emergency when a pressure not to exceed fifteen pounds is applied to the releasing device in the direction of exit travel. Primary locking device means the single locking system on a door or window unit whose primary function is to prevent unauthorized intrusion. Private or single-family dwelling means building designed exclusively for occupancy by one family.
Rail means the horizontal member of a window or door.
A meeting rail is one which mates with a rail of another sash or a framing member of the door or window frame when the sash is in the closed position. Sash is an assembly of stiles, rails, and sometimes, mullions assembled into a single frame which supports the glazing material. A fixed sash is one which is not intended to be opened. A movable sash is intended to be opened. Sill is the lowest horizontal member of a window frame.