BS EN 14399-7:2018 – TC:2020 Edition
$186.33
Tracked Changes. High-strength structural bolting assemblies for preloading – System HR. Countersunk head bolt and nut assemblies
| Published By | Publication Date | Number of Pages |
| BSI | 2020 | 67 |
This draft European Standard specifies, together with EN 14399 1 and EN 14399 2, the requirements for assemblies of high-strength structural countersunk bolts and nuts of system HR suitable for preloaded joints with thread sizes M12 to M36 and property classes 8.8/8 or 8.8/10 and 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 elongation of the bolt. For this purpose the components have the following characteristics: – regular nut height according to (style 1) see EN ISO 4032; – thread length of the bolt according to ISO 888. Bolting assemblies in accordance with this document include washers according to EN 14399 6 or to EN 14399 5. NOTE Attention is drawn to the importance of ensuring that 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 |
|---|---|
| 39 | undefined |
| 45 | 1 Scope 2 Normative references |
| 46 | 3 Bolts 3.1 Dimensions of bolts |
| 50 | 3.2 Specification for bolts and reference standard 3.3 Marking of bolts |
| 51 | 4 Nuts 4.1 Dimensions of nuts |
| 53 | 4.2 Specification for nuts and reference standards |
| 54 | 4.3 Proof load values of nuts 4.4 Decarburisation of the nut thread |
| 55 | 4.5 Marking of nuts 5 Designation of the bolt/nut assemblies 6 Associated washers |
| 56 | 7 Functional characteristics of the bolt/nut/washer assembly 7.1 General |
| 57 | 7.2 Maximum individual value of the bolt force during fitness for purpose test (Fbi max) 7.3 Values of angle Δθ1 |
| 58 | 7.4 Values of angle Δθ2 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 |
| 60 | Annex A (normative)Clamp lengths and grip lengths A.1 Clamp lengths for countersunk head bolting assemblies |
| 63 | A.2 Grip lengths for countersunk head bolting assemblies |
