BS EN 14399-9:2018 pdf free.High-strength structural boltingassemblies for preloading.
BS EN 14399-9 This document specifies，together with EN 14399-1 and EN 14399-2, the requirements for directtension indicators, nut face washers (HN) and bolt face washers (HB) as part of high-strength structuralbolting assemblies suitable for preloaded joints. These direct tension indicators are specified as part of high-strength structural bolting assemblies ofsystem HR or HV in accordance with EN 14399-3，EN 14399-4，EN 14399-7 or EN 14399-8,withnominal thread sizes M12 up to and including M36 and property classes 8.8/8 or 8.8/10 and 10.9/10.lt specifies two property designations H8 and H10 for direct tension indicators, together with generaldimensions, tolerances, materials and functional property/ies.
Bolting assemblies in accordance with this document have been designed to allow preloading of at least0.7 fub ×A1 according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by plasticelongation of the bolt for system HR in accordance with EN 14399-3 or EN 14399-7, or by plasticdeformation of the engaged threads for system HV in accordance with EN 14399-4 or EN 14399-8.Bolting assemblies conforming to this document may include washer(s) according to EN 14399-6 or toEN 14399-5 (under the nut only).NOTE1 Attention is drawn to the importance of ensuring that the bolting assemblies are correctly used ifsatisfactory results are to be obtained. For recommendations concerning proper application，reference toEN 1090-2 is made.
General requirements and requirements for suitability for preloading are specified in EN 14399-2together with Clause 5 of this document.NOTE2 Direct tension indicators are also known as load indicating washers.2Normative references
The following documents, in whole or in part, are normatively referenced in this document and areindispensable for its application.For dated references,only the edition cited applies. For undatedreferences, the latest edition of the referenced document (including any amendments) applies.
EN ISO 17668,Zinc diffusion coatings on ferrous products — Sherardizing —Specification (IS0 17668)EN14399-1,High-strength structural bolting assemblies for preloading — Part 1:General requirementsEN 14399-2,High-strength structural bolting assemblies for preloading – Part 2: Suitability forpreloading
EN 14399-3, High-strength structural bolting assemblies for preloading — Part 3:System HR 一 Hexagonbolt and nut assemblies
EN 14399-4, High-strength structural bolting assemblies for preloading —Part 4: System HV —Hexagonbolt and nut assemblies
EN 14399-5, High-strength structural bolting assemblies for preloading — Part 5: Plain washers
EN 14399-6,High-strength structural bolting assemblies for preloading – Part 6: Plain chamferedwashers.BS EN 14399-9 pdf download.