SIST EN 14399-7:2008
High-strength structural bolting assemblies for preloading - Part 7: System HR - Countersunk head bolt and nut assemblies
High-strength structural bolting assemblies for preloading - Part 7: System HR - Countersunk head bolt and nut assemblies
This document belongs to the suite of European Standards EN 14399 and is designed to be read in conjunction with EN 14399-1 for: general requirements; testing for conformity evaluation; evaluation of conformity; regulatory marking; for assemblies of high-strength structural countersunk bolts and nuts of system HR suitable for preloaded joints with thread sizes M12 to M36 and bolt property classes 8.8 and 10.9 and EN 14399-2 for suitability testing. This document gives requirements for: dimensions; associated washer(s) according to EN 14399-5 or to EN 14399-6; performance and suitability tests; for assemblies with thread sizes M12 to M36 and bolt property classes 8.8 and 10.9.
Hochfeste planmäßig vorspannbare Schraubenverbindungen für den Metallbau - Teil 7: System HR - Garnituren aus Senkschrauben und Muttern
Dieses Dokument gehört zur Reihe der Europäischen Normen EN 14399 und ist zusammen mit EN 14399-1
anzuwenden für
- allgemeine Anforderungen,
- die Prüfung für die Konformitätsbewertung,
- die Konformitätsbewertung,
- die vorschriftsmäßige Kennzeichnung
für Garnituren aus hochfesten Senkschrauben und Muttern des Systems HR, die für vorspannbare
Schraubenverbindungen geeignet sind, mit Gewindegrößen M12 bis M36, Schraubenfestigkeitsklassen 8.8
und 10.9 sowie EN 14399-2 für die Eignungsprüfung.
Dieses Dokument spezifiziert Festlegungen für
- Maße,
- die zugehörige(n) Scheibe(n) nach EN 14399-5 oder EN 14399-6,
- Funktions- und Eignungsprüfungen
für Garnituren der Gewindegrößen M12 bis M36 und der Schraubenfestigkeitsklassen 8.8 und 10.9.
Die Garnituren aus Senkschrauben und Muttern nach diesem Dokument wurden so gestaltet, dass sie ein
Vorspannen auf mindestens 0,7 fub × As
1) in Übereinstimmung mit EN 1993-1-8 (Eurocode 3) erlauben, und
dass sie ihr Verformungsvermögen vorwiegend durch Verlängerung der Schraube erreichen. Zu diesem
Zweck weisen die Komponenten folgende Merkmale auf:
⎯ Mutterhöhe entsprechend Typ 1 (siehe EN ISO 4032);
⎯ Gewindelänge der Schraube entsprechend ISO 888.
Boulonnerie de construction métallique à haute résistance apte à la précontrainte - Partie 7: Système HR - Boulons à tête fraisée (vis + écrou)
Le présent document fait partie de la série de Normes européennes EN 14399 et a été élaborée en vue d’être appliquée en association avec l’EN 14399-1 pour :
- les exigences générales ;
- les essais pour l’évaluation de la conformité ;
- l’évaluation de la conformité ;
- le marquage règlementaire ;
aux ensembles vis à tête fraisée et écrous de construction à haute résistance du système HR, de diamètre de filetage M12 à M36 et de classes de qualité 8.8 et 10.9, utilisables dans les assemblages précontraints et en association avec l’EN 14399-2 pour les essais d’aptitude à l’emploi.
Le présent document donne les prescriptions pour :
- les dimensions ;
- la (ou les) rondelle(s) associée(s) conformément à l’EN 14399-5 ou à l’EN 14399-6 ;
- les performances et les essais d’aptitude à l’emploi ;
- les ensembles de diamètre de filetage M12 à M36 et de classes de qualité 8.8 et 10.9.
Les ensembles vis à tête fraisée et écrous du présent document ont été conçus pour permettre une précontrainte d’au moins 0,7 fub As ) conformément à l’EN 1993-1-8 (Eurocode 3) et pour obtenir la ductilité principalement par l’allongement de la vis. A cet effet, les éléments constitutifs ont les caractéristiques suivantes :
- hauteur d’écrou conforme au style 1 (voir l’EN ISO 4032) ;
- longueur de filetage de la vis conforme à l’ISO 888.
Visokotrdnostne strukturne vijačne zveze za prednapetje - 7. del: Sistem HR - Zveze vijaka z vgrezno glavo in matice
General Information
Relations
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.High-strength structural bolting assemblies for preloading - Part 7: System HR - Countersunk head bolt and nut assemblies21.060.20MaticeNuts21.060.10Sorniki, vijaki, stebelni vijakiBolts, screws, studsICS:Ta slovenski standard je istoveten z:EN 14399-7:2007SIST EN 14399-7:2008en,fr,de01-marec-2008SIST EN 14399-7:2008SLOVENSKI
STANDARD
SIST EN 14399-7:2008
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 14399-7December 2007ICS 21.060.01 English VersionHigh-strength structural bolting assemblies for preloading - Part7: System HR - Countersunk head bolt and nut assembliesBoulonnerie de construction métallique à haute résistanceapte à la précontrainte - Partie 7: Système HR - Boulons àtête fraisée (vis et écrou)Hochfeste planmäßig vorspannbareSchraubenverbindungen für den Metallbau - Teil 7: SystemHR - Garnituren aus Senkschrauben und MutternThis European Standard was approved by CEN on 10 November 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 14399-7:2007: ESIST EN 14399-7:2008
EN 14399-7:2007 (E) 2
Contents Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.6 4 Bolts.6 5 Nuts.12 6 Designation of the countersunk head bolt/nut assembly.16 7 Associated washers.16 8 Functional characteristics of the bolt/nut/washer(s) assembly.17 Bibliography.21 Figures Figure 1 — Dimensions of bolts Table 2 — Dimensions of bolts a.7 Figure 2 — Example for marking of a bolt.12 Figure 3 — Dimensions of nuts.12 Figure 4 — Example for marking of a nut.16 Figure 5 — Adapter.17 Figure 6 — Test set-up.18 Tables Table 1 — Systems of bolt/nut/washer(s) assemblies.4 Table 2 — Dimensions of boltsa.8 Table 3 — Specifications for bolts and reference standards.11 Table 4 — Dimensions of nuts a.13 Table 5 — Specifications for nuts and reference standards.14 Table 6 — Proof load values of nuts.15 Table 7 — Hardness values of nuts, if specified.15 Table 8 — Characteristics of adapters.17 Table 9 — Values for ∆Θ1.19 Table 10 — Values for ∆Θ2.19
SIST EN 14399-7:2008
EN 14399-7:2007 (E)
3
Foreword This document (EN 14399-7:2007) has been prepared by Technical Committee CEN/TC 185 “Fasteners”, the se-cretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 2008, and conflicting national standards shall be withdrawn at the latest by June 2010. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following coun-tries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Den-mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. SIST EN 14399-7:2008
EN 14399-7:2007 (E) 4
Introduction This document for structural bolting reflects the situation in Europe where two technical solutions exist 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 1. 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. It is however important for the performance of the assembly to avoid mixing up the components of both systems. Therefore bolts and nuts for both systems are standardized in one single part of this European Standard each and the marking of the components of the same system is uniform. Table 1 — Systems of bolt/nut/washer(s) assemblies
Bolt/nut/washer(s) assembly System HR Bolt/nut/washer(s) assembly System HV General requirements EN 14399-1 Bolt/nut
assemblies EN 14399-3, EN 14399-7 EN 14399-4, EN 14399-8 Marking HR HV Property classes 8.8/8 or 8.8/10 10.9/10 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 preloading EN 14399-2 EN 14399-2
Preloaded bolted assemblies are very sensitive to differences in manufacture and lubrication. Therefore it is important that the assembly is supplied by one manufacturer who is always responsible for the function of the assembly. For the same reason it is important that the coating of the assembly is under the control of the manufacturer. Beside the mechanical properties of the components, the functionality of the assembly requires that the specified pre-load can be achieved if the assembly is tightened with a suitable procedure. For this purpose a test method for the suitability of the components for preloading was created which will demonstrate whether the function of the assembly is fulfilled. Attention is drawn to the importance of ensuring that the bolts are correctly used if satisfactory results are to be ob-tained. For recommendations concerning proper application, reference to prEN 1090-2 is made.
SIST EN 14399-7:2008
EN 14399-7:2007 (E)
5
1 Scope This document belongs to the suite of European Standards EN 14399 and is designed to be read in conjunction with EN 14399-1 for: general requirements; testing for conformity evaluation; evaluation of conformity; regulatory marking; for assemblies of high-strength structural countersunk bolts and nuts of system HR suitable for preloaded joints with thread sizes M12 to M36 and bolt property classes 8.8 and 10.9 and EN 14399-2 for suitability testing. This document gives requirements for: dimensions; associated washer(s) according to EN 14399-5 or to EN 14399-6; performance and suitability tests; for assemblies with thread sizes M12 to M36 and bolt property classes 8.8 and 10.9. Countersunk bolt and nut assemblies to this document have been designed to allow preloading of at least 0,7 fub × As1)
according to EN 1993-1-8 (Eurocode 3) and to obtain ductility predominantly by elongation of the bolt. For this purpose the components have the following characteristics: nut height according to style 1 (see EN ISO 4032), thread length of the bolt according to ISO 888. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1993-1-8, Eurocode 3: Design of steel structures — Part 1-8: Design of joints EN 10045-1, Metallic materials - Charpy impact test - Part 1: Test method EN 14399-1:2005, High-strength structural bolting assemblies for preloading - Part 1: General requirements EN 14399-2:2005, High-strength structural bolting assemblies for preloading - Part 2: Suitability test for preloading 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 chamfered washers
1) fub is the nominal tensile strength (Rm) and As is the nominal stress area of the bolt. SIST EN 14399-7:2008
EN 14399-7:2007 (E) 6
EN 20898-2, Mechanical properties of fasteners - Part 2: Nuts with specified proof load values - Coarse thread (ISO 898-2:1992) EN 26157-1, Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements (ISO 6157-1:1988) EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts, screws and studs (ISO 898-1:1999) EN ISO 3269, Fasteners - Acceptance inspection (ISO 3269:2000) EN ISO 4032, Hexagon nuts, style 1 - Product grades A and B (ISO 4032:1999) EN ISO 4759-1, Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C (ISO 4759-1:2000) EN ISO 6157-2, Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2:1995) EN ISO 10684, Fasteners - Hot dip galvanized coatings (ISO 10684:2004) ISO 148-1, Metallic materials - Charpy pendulum impact test - Part 1: Test method
ISO 261, ISO general purpose metric screw threads — General plan ISO 888, Bolts, screws and studs — Nominal lengths, and thread lengths for general purpose bolts ISO 965-2, ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general purpose ex-ternal and internal screw threads - Medium quality ISO 965-5, ISO general purpose metric screw threads - Tolerances - Part 5: Limits of sizes for internal screw threads to mate with hot-dip galvanized external screw threads with maximum size of tolerance position h before galvanizing 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 14399-1:2005 and 14399-2:2005 apply. 4 Bolts 4.1 General
The test method for suitability for preloading shall be as specified in EN 14399-2. 4.2 Dimensions of bolts See Figure 1 and Table 2. SIST EN 14399-7:2008
EN 14399-7:2007 (E)
7
The difference between lg and ls shall not be less than 1,5 P. a Incomplete thread u ≤ 2P
Figure 1 — Dimensions of bolts SIST EN 14399-7:2008
EN 14399-7:2007 (E) 8
Table 2 — Dimensions of bolts a Dimensions in millimetresThread d M12 (M14)b M16 (M18)b M20
Pc
1,75
2
2
2,5
2,5 d
30
34
38
42
46 e —
40
44
48
52
b (ref.) f — — — —
65
max.
12,70
14,70
16,70
18,70
20,84
ds
min.
11,30
13,30
15,30
17,30
19,16
max.
24,00
28,00
32,00
36
40
dk
min.
23,16
27,16
31,16
35
39
max.
16,5
19,5
22,5
25,5
28,5
i
min.
15,5
18,5
21,5
24,5
27,5
nom.
8,00
9,00
10,00
12,0
13,0
max.i
8,75
9,75
10,75
12,9
13,9
k
min.j
7,25
8,25
9,25
11,1
12,1
max. 1,6 1,6 1,6 2 2
r
min. 1,2 1,2 1,2 1,5 1,5
max.
3,0
3,0
3,0
3,5
3,5
n
min.
2,5
2,5
2,5
3,0
3,0
t
max. 4,5 4,5 4,5 5,0 5,0
min.
3,0
3,0
3,0
3,5
3,5 ls and lg g, h l nom. min. max. ls min. lg max. ls min. lg max. ls min. lg max. ls min. lg max. ls min. lg max.
45
43,75
46,25
14
19,25
50
48,75
51,25
14
19,25
18
24
55
53,5
56,5
16,25
25
18
24
60
58,5
61,5
21,25
30
16
22 18
24
23 30,5
65
63,5
66,5
26,25
35
21
31 18
24
23 30,5
7
...
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