BS 1366-5:2021 pdf download – Fire resistance tests for service installations Part 5: Service ducts and shafts 7.2 Standard supporting construction Where the type of supporting construction to be used in practice is not known, one of the standard supporting constructions as described in detail in EN 1363-1:2020, 7.2 shall be used. The standard floor construction as described in detail in EN 1363-1:2020, 7.2 does not cover flexible floor constructions (e.g. containing timber joists). An appropriate flexible standard supporting construction floors should be developed to cover these service shafts. The choice for the fire rating of the standard supporting construction is to be made by the test sponsor. It is recommended to use a fire rating which is approximately the same at the product to be tested. 7.3 Non-standard supporting constructions When the test specimen is intended to be used in a form of construction not covered by the standard supporting constructions, it shall be tested in that supporting construction. 8 Conditioning 8.1 General Conditioning of the test construction shall be in accordance with EN 1363-1. 8.2 Water based sealing materials Water based sealing materials (like mortar or gypsum) used to seal the gap between the supporting construction and the specimen where the gap is ≤ 10 mm wide shall be conditioned for at least 1 day before fire testing. Water based sealing materials used to seal the gap between the supporting construction and the specimen where the gap is 10 mm < x ≤ 50 mm wide shall be conditioned for at least 7 days before fire testing. If a gap is > 50 mm wide and it is filled with non-water based sealing materials, but on both sides covered by an outer layer consisting of water based materials ≤ 10 mm it shall be conditioned for at least 7 days. Water based sealing materials used to seal the gap between the supporting construction and the specimen where the gap is > 50 mm wide shall be conditioned for at least 28 days before fire testing. 9 Application of instrumentation 9.1 Thermocouples 9.1.1 Furnace thermocouples (plate thermometers) Plate thermometers shall be provided in accordance with EN 1363-1 and shall be positioned as shown in Figure 10. On service ducts or service shafts with fire from outside 3 pairs of plate thermometers shall be positioned in equal distances on the sides of the specimen. On service ducts or service shafts...
Download Address
Download