RebatedLatchmortice lock/lock or latch which has the faceplate and strike shaped to match the rebated edge of a door, usually the meeting edges of two door leaves.Regular BoltA latchbolt with the bevel set to suit a door opening in. Removable Core Cylinder A cylinder containing an easily removable core assembly, which Incorporates the entire tumbler mechanism Including the barrel, tumblers and separate shell. The cores normally are removable and interchangeable by use of a special key (called a "control key").Removable MulllonA mullion doors separating vertically within a door frame. Required for the normal operation of doors but designed to permit Its temporary removal over the entire width of the opening can be utilised.Restricted KeyA key which can only be obtained through an authorisation system.Restricted ProfilesProfiles and broaches that are generally used in special keying systems.ReturnA moulding turned back to the wall on which it Is located.Reveal (ofa doorframe)a) That part of a back bend that projects out from the finished wall.b) The dimension from the inside face of a door, when In the closed position, to the face of the frame at the side opposite from the direction of the door swing.Reverse BoltA latchbolt with the bevel set to suit a door opening out. Reversible latchbolt A Bolt that can be adapted to suit doors of either hand, opening in or opening out.Reversible LockA lock with components that can be readily adapted to suit doors of either hand, opening in or out.RibA raised ridge or well-formed fold in sheet metal to provide stiffness. RIM Lock, Rim Latch A lock or latch which mounted to the surface of a door, rather than inserted into it.RiserThe vertical board of a step. Itforms the front of the stair step. Roller Bolt A spring-loaded, roller shaped bolt.Roller Strike A strike incorporating a roller at the point of contact bolt to minimise friction.Rose See Escutcheon.The Rotor See Barrels.SashA framing for windowpanes. A sash window is generally understood to be a double-hung, vertically sliding window.Satin Finish
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