ÖNORM EN 14399-10

This document specifies, together with EN 14399-1 and EN 14399-2, the requirements for assemblies of high-strength structural bolts and nuts of system HRC suitable for preloaded joints, with hexagon head (large width across flats), cup head or countersunk head, thread sizes M12 to M36 and property class 10.9/10. Bolting assemblies in accordance with this document have been designed to allow preloading of at least 0,7 fub × As1) 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: - regular nut height according to style 1, see EN ISO 4032; or - nut with height m = 1 D; - thread length of the bolt according to ISO 888. Bolting assemblies in accordance with this document include washers according to EN 14399-6 or to EN 14399-5 (under the nut only).