CDW SYSTEMS LTD

Glossary of Common Terms

AFT:                     Abbreviation for anti-finger trap  

Access  Control:   Entry into the building  is controlled by means of hardware such as electric strikes magnetic locks or keypad locks.

Armoured Part:    Provides high security by means of a cosmetic trim plate and a long steel backing plate with a protective lip
                             to prevent forced entry.  

Backset:               The horizontal dimension from the front of the faceplate to the centre of the cylinder. 

Bottom pivot:       Dome shaped item fitted to the threshold for the door leaf to sit on.   (Centre hung doors). 

Bottom shoe:        Fitted to the bottom rail of a door leaf and locates onto the bottom pivot. 

BTB:                      Term used for door handles fitted both sides with back-to-back fixings. 

Cam:                     The part on the back of a cylinder that rotates when the key is turned and operates the lock mechanism. 

Centre Hung:        A door having a concealed overhead closer in the frame head and bottom pivot, with a pivoting action
                    for either single or double action.

CVR:                      Abbreviation for exit devices using Concealed Vertical Rods. 

Cylinder:               Used to operate the lock, generally supplied with a key both sides or key outside and thumbturn internally. 

Deadlatch:            A lock that operates on a spring return so that the latch may self lock either automatically or manually. 

Deadlock:              A lock having no spring action, actuated by cylinder or thumbturn. 

Dogging:              The means of retaining the lock bolt or exit device mechanism in the open position to allow the door to be free
          swinging.  (also known as snibbing facility).                           

Electric Strike:     A device which enables entry and egress without retraction of the deadlatch by mechanical means.  Normally
          activated by a push button or similar.

Entry Trim:           Lever or knob type handle which can be locked and unlocked with a key. 

Escutcheon:          A plate that fits over the cylinder, thumbturn, handle etc. and is fitted to the door stile.

External Access:   Simple means of effecting entry by use of a key and a pull handle. 

Exit device:           Horizontal bar running the full width of the door leaf where pressure on the bar releases the locking arrangement.                     (Also known as emergency escape device, touch bar and panic bar). 

Faceplate:             Fitted to the leading edge of the door after the cylinder has been installed. 

Hinge:                   Dorma two part adjustable component fitted to rebated doors only. 

Hook Lock:            A lock that hooks into the strike plate and can only be operated manually. 

KA:                        Term to indicate that cylinders are keyed alike. 

KD:                        Term to indicate that cylinders are keyed different

Latch lock:             A lock that operates on a spring return so that the latch may self lock. 

Lead Leaf:             The leaf on a pair of doors fitted with the main lock.  Also referred to as primary, first, master or active leaf. 

Lock:                      The part fitted into the door leaf, usually operated by a key or thumbturn. 

Pad Handle            Standard 300mm high broad faced push/pull handle for fixing one or both sides. 

Paddle Handle:      Also known as a push paddle handle, used to operate a deadlatch or latch lock to facilitate egress from inside
            the building. 

Pocket Glazed:      Gasket glazed framing system where the glass is shuffled into the aperture and generally with a bead on the        
                               horizontal member only.  Also known as shuffle glazing. 

RS:                         Abbreviation for Rebated Stiles. 

Rebated:                Single action doors which shut against a rebate and fitted with face fixed closers and hinges. 

Slave Leaf:             The second leaf on a pair of doors.  Also known as second, slave, secondary or inactive leaf. 

Strike plate:          The trim fitted to the jamb or slave leaf for the lock to locate into when locked. 

Top arm:                Fitted to the top rail of a door leaf and incorporating a square hole to locate onto the door closer (centre hung
            doors only). 

WS:                        Abbreviation for Wide Stile

Our policy is one of constant product development and we therefore reserve the right to change specifications without notice.