BS EN 14399-4:2015 – TC:2020 Edition
$186.33
Tracked Changes. High-strength structural bolting assemblies for preloading – System HV. Hexagon bolt and nut assemblies
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 52 |
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 fub × As ) 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 |
|---|---|
| 33 | Foreword |
| 34 | Introduction |
| 35 | Table 1 — Composition of high-strength structural bolting assemblies and component marking |
| 36 | 1 Scope 2 Normative references |
| 37 | 3 Bolts 3.1 Dimensions of bolts Figure 1 — Dimensions of bolts |
| 38 | Table 2 — Dimensions of bolts |
| 40 | 3.2 Specifications for bolts and reference standards Table 3 — Specifications for bolts and reference standards 3.3 Marking of bolts |
| 41 | Figure 2 — Example of bolt marking 4 Nuts 4.1 Dimensions of nuts Figure 3 — Dimensions of nuts |
| 42 | Table 4 — Dimensions of nuts |
| 43 | 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 |
| 44 | 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 |
| 45 | 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 |
| 46 | 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 |
| 47 | Annex A (normative) Clamp lengths and Grip lengths Figure A.1 — Clamp length Σt and Grip length ts2 |
| 48 | Table A.1 — Clamp lengths Σta |
| 49 | Table A.2 — Grip length ts2a |
| 50 | Bibliography |
