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Fire resistance definition
NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Fire resistance (of a component or construction) – a measure of its ability to withstand the effects of fire in one or more ways for a stated period of time. Provisions on determination of performance
fire-safetystructuralWall thickness for masonry and flue block chimneys
2.25NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
The thickness of the walls for a masonry chimney around the flue, excluding the thickness of any flue liner, should be in accordance with Diagram 2.4.
combustion-appliancesflue-systemschimneystructuralFire Wall Location and Construction
6.13, 6.14NI-wide·Technical Booklet L Combustion Appliances and Fuel Storage Systems
Where a fire wall is part of a building or a boundary wall it should be located in accordance with Diagram 6.1(c) and if part of a building it should be constructed in accordance with Diagram 6.1(d).
fire-safetyfuel-storagestructural