DANSK DSF/ISO/FDIS 834-14 PDF

This Standard specifies a test and assessment method for determining the contribution of fire protection systems to the fire resistance of circular and rectangular solid steel bar. For other section shapes such as; angles, channels and flats reference should be made to ISO 834-10 and ISO 834-11. The standard cannot be used for twisted wire and is not suitable for cold or hot rolled steel bar primarily used for the reinforcement of concrete. The standard is applicable for the protection of solid bar up to a maximum diameter of 130 mm and in the case of rectangular bar the maxiumum side length shall be limited to 130 mm with a maximum aspect ratio of 2:1 against the shorter length side. Beyond these limits the dimensions are covered in ISO 834-10 and ISO 834-11. The standard may be used for any applied fire protection system including multi-layered systems provided they have demonstrated their integrity/ stickability when tested on floor beams and hollow sections under load, and assessed up to the maximum protection thickness in accordance with ISO 834-11. It is applicable to reactive fire protection materials (intumescent coatings) and passive materials which include sprays, board, slabs and preformed casings which are either in intimate contact with the bar, or which include an airspace between the bar and the protection system. The method used for applying/ fixing the fire protection to solid bar should be the same as that used in the protection of the steel floor beams or hollow sections. The standard contains the fire test methodology, which specifies the tests that shall be carried out to provide data on the thermal characteristics of the fire protection system when exposed to the standard temperature/time curve specified in ISO 834-1. It also contains the assessment, which prescribes how the analysis of the test data should be made and gives guidance on the procedures by which interpolation should be undertaken. This standard does not incorporate a loaded test on a tension member. The standard caters for testing in both the vertical and horizontal orientations at the discretion of the sponsor. Results from horizontally orientated bar may be applied to any orientaion, whilst results from vertically orientated bar shall only apply to that orientation.