DIN EN 14399-10:2009

High-strength structural bolting assemblies for preloading - Part 10: System HRC - Bolt and nut assemblies with calibrated preload; German version EN 14399-10:2009

This part of this European Standard specifies, together with EN 14399-1, the requirements for assemblies of high-strength structural bolts and nuts of system HRC suitable for preloaded joints, with hexagon head (large widths across flats) or cup head, thread sizes M12 to M30 and property class 10.9/10. Bolt and nut assemblies to this part of this European Standard have been designed to allow preloading of at least 0,7 fub As ) according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by plastic elongation of the bolt. For this purpose the components have the following characteristics: -nut according to EN 14399-3, or -nut with height m = 1d, -thread length of the bolt according to ISO 888. Bolt and nut assemblies to this part of thisEuropean Standard include washer(s) according to EN 14399-6 or to EN 14399-5 (under the nut only).