Active Leaf - The door on a double door set that is the first to be opened.

Acoustic - When approaching a noise control problem, the difference between sound absorption and sound insulation should be appreciated.

Sound Absorption refers to the attenuation of reverberant noise within the same room or area as the noise source. This normally involves lining all or part of the room surfaces with a material which absorbs sound.

Sound Insulation, otherwise known as sound reduction, is the prevention of noise being transmitted from one part of a building to another, for example by erecting a partition or wall. Plasterboard is an excellent form of sound proofing when used in conjunction with acousti-quilt together they provide a rating up to 55 db in a steel door.

Anti-Jemmy - A metal bar located on the passive leaf of a double door or a single frame to prevent levering from manual attack devices on the astragal lip (Not required on lipped flush door sets).

Astragal - The lipped edge of the door providing additional security whilst preventing unwanted intrusion.

Attack Resistant - Designed to resist typical attack points made by the average intruder, using normal equipment.

Back Check - This action provides resistance within the door closer to prevent the door leaf from being thrown open. This prevents damage to the door, door frame and door handles caused by people kicking or throwing the door open and also by the door being violently blown open by the wind. The angle and resistance of the back check can be varied according to your requirements.

Bathroom Lock - Latch bolt withdrawn by lever handles from either side, Deadbolt operated by turn or emergency release.

Bi Folding - A door set consisting of more than two leaves, which can have a concertina affect.    

Cill - Also know as a Threshold, the bottom most part of a doorway that one crosses to enter. We have a variety of cill’s to choose from ranging from A,B,C,D,F,H,J, which are free of charge. E & G are chargeable.

Corrosion Resistance - Offering resistance against corrosion, i.e. Electro Zinc coating to protect the underlying steel.

Customer Tick Sheet - A Design and Supply sheet of paper with drawings and boxes for you to indicate your requirements when ordering.   

Cylinder - A component part of a lock which accepts the key, held on by a cylinder ring secured internally by screws.

Dead Lock – A lock with Deadbolt only operated by a cylinder or thumb turn.

Decibel – (db) is the unit used to measure the intensity of a sound.

Delayed Action - This allows the door to remain open for a preset period of time before closing at an adjustable speed. Such a system will allow people in wheelchairs or the elderly to get through the door before it starts to close. This is also useful in areas where trolleys are used.

Dog Bolts - Case hardened steel dowels strategically positioned for extra security.

Drop Seal - A mortised or surface mounted mechanical seal which has a button on the side when pressed the seal contained inside drops to the floor creating a uniformed seal.

Electro- Zinc Coated - Coating used on mild steel to increase corrosion resistance.

Embossed Panels - A decorative pattern in square or rectangles with radius corner.

Escape Handle - Part of a panic exit system shaped as a handle where more commonly a bar would be used.

Etch Primer - Primer paint with special adhesion properties for use on coated steel.

External Access - Gaining entrance through a door set from the outside by means of a key or electronic device.

Extended Hinges - A hinge that projects past the door to allow the door open at 180°

Fire Rating - Having been tested in accordance with BS 476 part 22 1987, and given classification reflecting the resistance achieved in time.

Frame Caps - A three sided trim set which fits behind the vertical jamb legs, when used in conjunction with jacking screws can provide a neat appearance to the finish door set.

Handing - Which side the door is hung (hinged), (see handing diagram).

Inactive or Passive leaf - The door on a double door set that is the second to be opened.

Jacking Screws - A cylindrical threaded device used to aid in the fixing of the frame to wall, this does away with the traditionally used shim packs.

Kick plate - A plate usually made of stainless steel which covers the with of a door leaf, normally 150mm high to prevent the bottom of the door being damaged from shoe marks, etc.

Knobset - An Outside Access Device used in conjunction with panic hardware allowing access from outside (lockable by key).

Latch - A non locking latch bolt withdrawn by lever handles from either side.

Leading Edge - The edge of the door leaf farthest from the hinge side.

Leaf Selector - To ensure effective fire compartmentation in buildings, it is essential that the individual leaves of pairs of doors with rebated meeting stiles close in the correct sequence. This is achieved by the use of door coordinator devices.

Loss Prevention Certification Board - Part of BRE Certification Ltd, within the Foundation for the built Environment (FBE). The LPCB operates product certification for fire and security products and services.

Louvres – ventilation grill  

LPS 1175 - Specification for testing and classifying the burglary resistance of building components.

Manganese Steel - A hardened steel sheet material incorporating manganese which makes it almost impossible to drill through.

Maglock – A magnetic locking device which is able to be connected via a 12v/24v power supply to a variety of different sources to control the device via switches, fire alarms, intercoms, etc.

Nightlatch - A non locking latch bolt withdrawn by lever handle from the inside and by a key from the outside.

Outward Opening - When viewing the door from the outside the door would open towards you.

Over Panel – A panel in a frame which is attaché to the door frame to form an extension to the height.

Panic Hardware - A device to give emergency exit from a door set by retracting its locking mechanism when pushed.

Push Pad - A rectangular shaped pad which activates a panic escape system where more commonly a bar would be used.

Powder Coating - is a type of coating that is applied as a free-flowing, dry powder. The main difference between a conventional liquid paint and a powder coating is that the powder coating does not require a solvent to keep the binder and filler parts in a liquid suspension form. The coating is typically applied electrostatically and is then cured under heat to allow it to flow and form a "skin." The powder may be a thermoplastic or a thermoset polymer. It is usually used to create a hard finish that is tougher than conventional paint.

Radar Lock - RADAR is a national network of disability organisations and disabled people. Formed in 1977 as the Royal Association for Disability and Rehabilitation, RADAR is a national organisation run by and working for disabled people. The National Key Scheme (NKS) offers independent access to disabled people to around 7,000 locked public toilets around the country. RADAR would like all providers of accessible toilets to keep their toilets unlocked if at all possible.  The NKS is suggested for use only if the provider concerned has to keep the toilets locked to stop vandalism and misuse.

Ral - In 1927 the German Reichsausschuß für Lieferbedingungen und Gütesicherung (State Commission for Delivery Terms and Quality Assurance) invented a collection of 40 colors under the name of "RAL 840". Prior to that date manufacturers and customers had to exchange samples to describe a tint, whereas from then on they would rely on numbers.

Rockwool - Rockwool is used for fire rated doors and are effective in reducing the U value (thermal transmittance).
It consists of an un-faced, plain-edged slab manufactured from high-density mineral wool (rock) which is resin-bonded and water-repellent. The slabs do not prejudice the fire resistance properties of the floor and will not contribute to the development stages of a fire nor present a smoke or toxic hazard.

Sash Lock - A locking latch bolt withdrawn by lever handles from either side, Deadbolt operated by key or thumb turn

Seal - A self adhesive silicone or EPDM (Ethylene Propylene Diene Monomer) strip which creates a seal between the door and frame.

Security Rated - Having been tested and evaluated to LPS 1175 and given a security rating by the Loss Prevention Certification Board.

Side Panel - A panel in a frame which is attached to the door frame to form an extension to the width.

Stock Doors - A pre stocked door set in two sizes and two different hardware sets (see stock doors on the website for more info).

Three Point Locking - A bolting system which secures the leaf into the frame in three places, normally top, bottom and centrally on the leading edge. Auto bolting systems include catches and triggers to automatically re-secure in these places when the door is closed, without manually resetting the device.

Timber Core - Timber Core is used when additional security is required. As with all our range of, this doorset can be of bespoke design. The design of the door is of exact replica of our range, but for the core. This is in-filled with 44mm thick solid wood, thus giving you a 48mm thick leaf. This core now gives the door blade a very solid Anti Vandal proof defence. Typical locations where this doorset may be suitable includes: - Detention Centres, Schools, Safe Rooms, Storage Units containing valuables or Dangerous or Hazardous materials etc. This range of doorset is far the most solid deterrent to attack and to compliment its strength along with the finish of the highest standard. There are no restrictions regarding the use of door furniture, Single or Double Doors that the opening demands.

Timber Grain - A laminated steel sheet design incorporating a wood grain effect, (finishes subject to availability).

Tongue & Groove - A door design with vertical grooves.

Triple Lockset - A three point locking system comprising of top and bottom deadlocking and centre sash locks, all three locks are linked with a control rod.

Two Point Locking - A bolting system which secures the leaf into the frame in two places, normally top and bottom on the leading edge. Auto bolting systems include catches and triggers to automatically re-secure in these places when the door is closed, without manually resetting the device.

U Value - To put it simply, U-Value is the measure of the rate of heat loss through a material. So for example single glazed windows have a typical U-value of 5.6 while double glazed windows have a typical U-value of 2.8. The calculation of U-values can be rather complex - it is measured as the amount of heat lost through a one square meter of the material for every degree difference in temperature either side of the material. It is indicated in units of Watts per Meter Squared per Degree Kelvin or W/m2K. Note that Kelvin is used as the scale of temperature difference, but this is numerically equal to C (centigrade). So for example, one square meter of a standard single glazed window will transmit about 5.6 watts of energy for each degree difference either side of the window or a U-Value of 5.6. A double glazed window will be significantly better with a U-value of 2.8 i.e. only transmitting 2.8 watts of energy in similar conditions.

Uncertified - A door configuration containing elements outside the scope of the certification.

Vision Panel - A glazed aperture within a frame.

Wrap Around Frame - Also know as Clamp Frame; this frame comes in two parts, a front and a back. It wraps around the wall creating a self contained architrave.