BS EN 14399-8:2007

This standard BS EN 14399-8:2007 High-strength structural bolting assemblies for preloading is classified in these ICS categories:

• 21.060.01 Fasteners in general

This document belongs to the suite of European Standards EN 14399 and is designed to be read in conjunction with EN 14399-1 for:

• general requirements;

• testing for conformity evaluation;

• evaluation of conformity;

• regulatory marking;

for assemblies of high-strength structural fit bolts and nuts of system HV suitable for preloaded joints with, thread sizes M12 to M36 and bolt property class 10.9 and EN 14399-2 for suitability testing.

This part gives requirements for:

• dimensions;

• associated washer(s) according to EN 14399-6;

• performance and suitability tests

for assemblies with thread sizes M12 to M36 and bolt property class 10.9.

Assemblies of hexagon fit bolts with shaft diameter ( d + 1 mm) and nuts according to this part of this European Standard have been designed to allow preloading of at least 0,7 f_ub × A_s ¹⁾ according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by deformation of the engaged thread. For this purpose the components have the following characteristics:

• nut height approximately 0,8 d;

• hexagon fit bolt with short thread length.