This document specifies, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts of system HR suitable for preloaded joints with large widths across flats, thread sizes M12 to M36 and property classes 8.8/8 and 10.9/10. Bolt and nut assemblies toThis document have been designed to allow preloading of at least 0,7 fub×As 1) according to ENV 1993-1-1 (Eurocode 3) and to obtain ductility predominantly by plastic elongation of the bolt. ForThis purpose the components have the following characteristics: nut height according to style 1 (see EN ISO 4032) thread length of the bolt according to ISO 888 Bolt and nut assemblies toThis document include washers according to EN 14399-6 or to EN 14399-5 (under the nut only). NOTE Attention is drawn to the importance of ensuring that the bolts are correctly used if satisfactory result are to be obtained. For recommendations concerning proper application, reference to ENV 1090-1 is made. The test method for suitability for preloading is specified in EN 14399-2.
EN 14399-3:2005 history
2015EN 14399-3:2015 High-strength structural bolting assemblies for preloading - Part 3: System HR - Hexagon bolt and nut assemblies
2005EN 14399-3:2005 High-strength structural bolting assemblies for preloading - Part 3: System HR - Hexagon bolt and nut assemblies