DEFINITIONS
Penetration 2 An aperture with one or more services passing through. Penetration seal 2 A system used to maintain the performance of a separating element at the position where one or more services pass through or where there is provision for services to pass through a fire-separating element. Principal designer An organisation or individual (on smaller projects) appointed by the client to take control of the pre- construction phase of any project involving more than one contractor. HSE CDM Principal Designer hse.gov.uk/construction/cdm/2015/principal-designers.htm Relevant buildings Defined in Regulation 7(4) of Approved Document B in England Fire Safety: Approved Document B gov.uk/government/publications/fire-safety-approved- document-b R-value R-value (also known as thermal resistance) is the measure of how well a particular thickness of material resists heat transfer through thermal conduction . System owner 2 Person or organisation who owns the performance evidence of a system.
of construction products and building elements - Part 2: Classification using data from fire resistance tests. Fire resistance classifications are usually quoted as a function of the time period for which fire resistance has been proven, together with the classification indices R (loadbearing capacity), E (Integrity) and I (insulation performance). Fire-separating element 2 A compartment wall, compartment floor or construction that encloses a protected escape route and/or a place of special fire hazard. Helping hand bracket A cladding support system that typically consists of ‘helping hand’ brackets fixed to the substrate at set vertical and horizontal separations. Intumescent 2 A reactive material that, when heated, expands to maintain the penetration seal. Reactive fire protection material 4 Reactive materials specifically formulated to provide a chemical reaction upon heating, such that their physical form changes to provide fire protection by thermal insulative and cooling effects. Loadbearing wall 5 Wall designed to support a vertically applied load.
Membrane 1 A thin layer of material.
Sheathing board A layer of board that forms the outer SFS wall assembly.
Non-loadbearing wall 1 Wall designed not to be subjected to any load other than its own weight. Passive fire protection 2 A product or system that provides protection to the building and occupants without further change or requirement for activation or motion – for example, fire-resistant drylining.
Through-wall A series of components that, when tested together, can provide evidence of compliance. Considered to be from the inner plasterboard lining to the sheathing board, fixed to a light gauge steel framing, sometimes this will include the insulation on the face of the sheathing board.
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