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BS EN 14399-4:2015

BS EN 14399-4:2015

$142.49

High-strength structural bolting assemblies for preloading – System HV. Hexagon bolt and nut assemblies

Published By Publication Date Number of Pages
BSI 2015 24
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This European Standard specifies together with EN 14399‑1 and EN 14399‑2 , the requirements for assemblies of high-strength structural bolts and nuts of system HV suitable for preloaded joints with large widths across flats, thread sizes M12 to M36 and property classes 10.9/10.

Bolting assemblies in accordance with this document 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 plastic deformation of the engaged threads. For this purpose the components have the following characteristics:

  • nut height approximately 0,8 d;

  • bolt with short thread length.

Bolting assemblies in accordance with this document include washers according to EN 14399‑6 .

NOTE

Attention is drawn to the importance of ensuring that the bolting assemblies are correctly used if satisfactory results are to be obtained. For recommendations concerning proper application, reference to EN 1090‑2 is made.

General requirements and requirements for suitability for preloading are specified in EN 14399‑2 .

Clamp lengths and grip lengths for the bolting assemblies are specified in the normative Annex A.

PDF Catalog

PDF Pages PDF Title
5 Foreword
6 Introduction
7 Table 1 — Composition of high-strength structural bolting assemblies and component marking
8 1 Scope
2 Normative references
9 3 Bolts
3.1 Dimensions of bolts
Figure 1 — Dimensions of bolts
10 Table 2 — Dimensions of bolts
12 3.2 Specifications for bolts and reference standards
Table 3 — Specifications for bolts and reference standards
3.3 Marking of bolts
13 Figure 2 — Example of bolt marking
4 Nuts
4.1 Dimensions of nuts
Figure 3 — Dimensions of nuts
14 Table 4 — Dimensions of nuts
15 4.2 Specification for nuts and reference standards
Table 5 — Specifications for nuts and reference standards
4.3 Decarburization of the nut thread
4.4 Marking of nuts
16 Figure 4 — Example of nut marking
5 Designation of the bolt/nut assemblies
6 Associated washers
7 Functional characteristics of the bolt/nut/washers assembly
7.1 General
17 7.2 Maximum individual value of the bolt force during fitness for purpose test (Fbi,max)
7.3 Values of angle Δθ1
Table 6 — Values for Δθ1
7.4 Values of angle Δθ2
Table 7 — Values for Δθ2
18 7.5 Individual values of the k-factor (ki), mean value of the k-factor (km) and coefficient of variation of the k-factor (Vk)
7.5.1 Individual values of the k-factor (ki) for k-class K1
7.5.2 Mean value of the k-factor (km) and coefficient of variation of the k-factor (Vk) for k-class K2
19 Annex A (normative) Clamp lengths and Grip lengths
Figure A.1 — Clamp length Σt and Grip length ts2
20 Table A.1 — Clamp lengths Σta
21 Table A.2 — Grip length ts2a
22 Bibliography

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BS EN 14399-4:2015
$142.49