Glossary

A

Acoustic Seal
Any seal designed to reduce airborne sound transmission.
ADE: Approved Document E
Approved Document E to the Building Regulations (England) - Resistance to the passage of sound.
ADM: Approved Document M
Approved Document M to the Building Regulations (England) - Access to and use of buildings.
Airborne sound
Sound waves carried through air rather than a solid medium.
Ageing resistance
The ability to withstand degradation in service, tested through exposure to a particular environment.
Ambient temperature (smoke)
Smoke encountered some distance from the origin of a fire, and which has cooled but remains toxic.
Anodised
A hard, highly durable, electrolytic finish applied to aluminium extrusions, which greatly enhances the appearance at the same time. It is naturally clear, giving a silver effect, but coloured tints such as bronze, gold or gunmetal may be incorporated, generally at extra cost.
Astragal
A face-fixed vertical cover strip designed to conceal the gap that would otherwise exist between the meeting stiles of single-acting, non-rebated, double leaf doors.
Automatic door bottom
A threshold seal that automatically retracts from the floor surface as soon as the door leaf is opened by a few millimetres, and generally requires no electrical connections.
Automatic threshold seal
A threshold seal that automatically retracts from the floor surface as soon as the door leaf is opened by a few millimetres, and generally requires no electrical connections.
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