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EN 14399 Specification
HIGH-STRENGTH structural BOLTING ASSEMBLIES FOR PRELOADING
Structural bolting in Europe comprises two technical solutions to achieve the necessary ductility of Bolt/nut/washer assemblies. These solutions utilize different systems (HR and HV) of bolt/nut/Washer assemblies, see table below. Both systems are well proved and it is up to the experts responsible for structural bolting whether they use the one or the other system.
Items | Bolt/Nut/Washer Assembly | Bolt/Nut/Washer Assembly |
System | System HR | System HV |
General Requirements | EN 14399-1 | |
Bolt/Nut Assembly | EN 14399-3 | EN 14399-4 |
Marking | HR | HV |
Property Class | 8.8/8 | 10.9/10 |
Washer(s) | EN 14399-5 or EN 14399-6 | EN 14399-5 or EN 14399-6 |
Marking | H | H |
Suitability Test for | EN 14399-2 | |
Preloading |
EN 14399 PARTS 1-10
There are currently 10 parts BS EN 14399 which are listed in the table below.
BS EN 14399 Part One | General Requirements |
BS EN 14399 Part Two | Suitability test for Preloading (assembly test)* |
BS EN 14399 Part Three | Hexagon Bolt and Nut Assemblies (HR 8.8 and 10.9) |
BS EN 14399 Part Four | Hexagon Bolt and Nut Assemblies (HV 10.9) |
BS EN 14399 Part Five | |
BS EN 14399 Part Six | Plain Chamfered Washers |
BS EN 14399 Part Seven | Countersunk Bolt and Nut (HR 8.8 and 10.9) |
BS EN 14399 Part Eight | Hexagon Fitted Bolt and Nut Assemblies (HV 10.9) |
BS EN 14399 Part Nine | Direct Tension Indicators |
BS EN 14399 Part Ten | Tension Control Bolt and Nut Assemblies (HRC 10.9) |
Note: The `8.8 HR, 10.9 HR' means that the product was manufactured to BS EN 14399-3
Note: The `10.9 HV` means that the product was manufactured to BS EN 14399-4
EN14399-3 Class 8.8HR MECHANICAL PROPERTIES BOLTS
Items | Stress Area | Proof Load | Ultimate Load | Hardness Rockwell HRC | |
2 | Min. kN | Min. kN | |||
Dia. | mm |
|
| Min. | Max. |
M12 | 84.3 | 50.7 | 70 | 22 | 32 |
M16 | 157 | 94.5 | 130 | 22 | 32 |
M20 | 245 | 147 | 203 | 23 | 34 |
M22 | 303 | 182 | 252 | 23 | 34 |
M24 | 353 | 212 | 293 | 23 | 34 |
M27 | 459.33 | 275 | 381 | 23 | 34 |
M30 | 561 | 337 | 466 | 23 | 34 |
M36 | 817 | 490 | 678 | 23 | 34 |
EN14399-3 Class 10.9HR MECHANICAL PROPERTIES BOLTS
Items | Stress Area | Proof Load | Ultimate Load | Hardness Rockwell HRC | |
2 | Min. kN | Min. kN | |||
Dia. | mm |
|
| Min. | Max. |
M12 | 84.3 | 70 | 87.7 | 32 | 39 |
M16 | 157 | 130 | 163 | 32 | 39 |
M20 | 245 | 203 | 255 | 32 | 39 |
M22 | 303 | 252 | 315 | 32 | 39 |
M24 | 353 | 293 | 367 | 32 | 39 |
M27 | 459.33 | 381 | 477 | 32 | 39 |
M30 | 561 | 466 | 583 | 32 | 39 |
M36 | 817 | 678 | 850 | 32 | 39 |
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