The main terms used in the construction of floor plenums



The main terms used in the construction of floor plenums

We often get asked many questions regarding the construction of floor plenums.  To try and help our customers we have offered an explanation of the main terms used in floor plenums.
  1. Floor Panel – the load bearing, horizontal component of a Raised Access Floor system
  2. Floor Pedestal – the vertical, adjustable supporting component of a Raised Access Floor system
  3. Subfloor – the existing floor upon which a raised Access Floor System is installed.
  4. Plenum wall – the new and/or existing walls to the plenum, that compartments the plenum from the surrounding the other plenum zones.
  5. Finished Floor Height – the finished floor height from the subfloor, void height and panel thickness combined.
  6. Plenum Void – the space between the underside of a raised floor and the existing sub floor, sometimes referred to as a cavity or plenum.
  7. Service penetrations – these are usually ducts or cable trays that penetrate the plenum envelope, i.e. walls, floors or raised floor.
Detail of raised plenum floor construction



Supporting document BG65 / 2016 also contains lots of information on how to design, constructing and test floor plenums.

If you would like more information in regards to the most common air leakage paths visit our Plenum Testing page or call us on 01525 303905.

Location: London, UK

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