SIST EN 14399-8:2018
(Main)High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon fit bolt and nut assemblies
High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon fit bolt and nut assemblies
This draft 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 (including fit bolts with nominal shank diameter d + 1 mm) 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.
Hochfeste vorspannbare Garnituren für Schraubverbindungen im Metallbau - Teil 8: System HV - Garnituren aus Sechskant-Passschrauben und Muttern
Dieser Europäische Norm-Entwurf legt zusammen mit EN 14399-1 und EN 14399-2 die Anforderungen für Garnituren aus hochfesten Schrauben und Muttern für den Metallbau des Systems HV mit Gewindegrößen M12 bis M36 und Schraubenfestigkeitsklassen 10.9/10 fest, die für vorspannbare Schraubenverbindungen geeignet sind.
Die Garnituren für Schraubverbindungen (einschließlich der Passschrauben mit einem Nenndurchmesser des Schafts d + 1 mm) nach diesem Dokument wurden so gestaltet, dass sie ein Vorspannen auf mindestens 0,7 fub × As) nach EN 1993-1-8 (Eurocode 3) erlauben, und dass sie ihre Duktilität vorwiegend durch plastische Verformung der eingeschraubten Gewinde erreichen. Zu diesem Zweck weisen die Komponenten folgende Merkmale auf:
- Mutterhöhe etwa 0,8 d;
- Schraube mit kurzem Gewinde.
Die Garnituren für Schraubverbindungen nach diesem Dokument enthalten Scheiben nach EN 14399-6.
ANMERKUNG Es wird darauf hingewiesen, dass zum Zwecke zufriedenstellender Ergebnisse sicherzustellen ist, dass die Garnituren für Schraubverbindungen sachgerecht eingesetzt werden. Für Empfehlungen zur richtigen Anwendung wird auf EN 1090-2 verwiesen.
Allgemeine Anforderungen und Anforderungen bezüglich der Eignung zur Vorspannung sind in EN 14399-2 festgelegt.
Klemmlängen und Paketdicken für Schraubengarnituren sind im normativen Anhang A festgelegt.
Boulonnerie de construction métallique à haute résistance apte à la précontrainte - Partie 8 : Système HV - Boulons ajustés à tête hexagonale (vis + écrou)
Le présent projet de Norme européenne, avec l’EN 14399-1 et l’EN 14399-2, spécifie les exigences applicables aux boulons de construction métallique à haute résistance du système HV (vis + écrou), destinés à être utilisés dans les assemblages précontraints, à surplats de série large, de diamètre de filetage M12 à M36 et de classe de qualité 10.9/10.
Les boulons (incluant les boulons ajustés de diamètre nominal de la tige d + 1mm) conformes au présent document ont été conçus pour permettre une précontrainte d’au moins 0,7 fub x As) conformément à l’EN 1993-1-8 (Eurocode 3) et à obtenir la ductilité principalement par allongement plastique de la vis. Pour ce faire, les composants doivent avoir les caractéristiques suivantes :
- hauteur d’écrou d’environ 0,8 d ;
- vis à filetage court.
Les boulons (vis + écrou) conformes au présent document comportent des rondelles conformes à l’EN 14399-6.
NOTE L’attention est attirée sur l’importance de veiller à ce que les boulons soient correctement utilisés si des résultats satisfaisants doivent être obtenus. Pour des recommandations relatives à une application adéquate, référence à la norme EN 1090-2 est faite.
Les exigences générales et les exigences pour l’aptitude à l’emploi sont spécifiées dans l’EN 14399-2.
Les longueurs de serrage des boulons et les épaisseurs serrées sont données dans l’Annexe A normative.
Visokotrdnostne strukturne vijačne zveze za prednapetje - 8. del: Sistem HV - Zveze prilagodnega vijaka s šestrobo glavo in matice
Ta osnutek evropskega standarda skupaj s standardoma EN 14399-1 in EN 14399-2 določa zahteve za zveze visokotrdnostnih strukturnih vijakov in matic sistema HV, ki so primerne za prednapetja, z velikimi širinami na ravninah, velikostmi navojev od M12 do M36 ter razredi trdnosti 10,9/10.
Vijačne zveze (vključno s prilagodnimi vijaki z nazivnim premerom stebla d + 1 mm), skladne s tem dokumentom, so bile zasnovane za prednapetje vsaj 0,7 fub × As v skladu s standardom EN 1993-1-8 (Evrokod 3) in ohranjanje duktilnosti predvsem s plastično deformacijo navojev. Za ta namen imajo sestavni deli naslednji značilnosti:
– višino matice približno 0,8 d;
– vijak s kratko dolžino navoja.
Zveze vijakov, skladne s tem dokumentom, vključujejo podložke v skladu s standardom EN 14399-6.
OPOMBA: Za doseganje zadovoljivih rezultatov je treba opozoriti na pomembnost zagotavljanja pravilne uporabe vijačnih zvez. Za priporočila glede pravilne uporabe je omenjen standard EN 1090-2.
Splošne zahteve in zahteve za primernost za prednapetje so določene v standardu EN 14399-2.
Dolžine objemk in dolžine oprijema za vijačne zveze so določene v normativnem dodatku A.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN 14399-8:2018
01-oktober-2018
1DGRPHãþD
SIST EN 14399-8:2008
9LVRNRWUGQRVWQHVWUXNWXUQHYLMDþQH]YH]H]DSUHGQDSHWMHGHO 6LVWHP+9
=YH]HSULODJRGQHJDYLMDNDVãHVWURERJODYRLQPDWLFH
High-strength structural bolting assemblies for preloading - Part 8: System HV - Hexagon
fit bolt and nut assemblies
Hochfeste vorspannbare Garnituren für Schraubverbindungen im Metallbau - Teil 8:
System HV - Garnituren aus Sechskant-Passschrauben und Muttern
Boulonnerie de construction métallique à haute résistance apte à la précontrainte - Partie
8 : Système HV - Boulons ajustés à tête hexagonale (vis + écrou)
Ta slovenski standard je istoveten z: EN 14399-8:2018
ICS:
21.060.10 Sorniki, vijaki, stebelni vijaki Bolts, screws, studs
21.060.20 Matice Nuts
SIST EN 14399-8:2018 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 14399-8:2018
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SIST EN 14399-8:2018
EN 14399-8
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2018
EUROPÄISCHE NORM
ICS 21.060.01 Supersedes EN 14399-8:2007
English Version
High-strength structural bolting assemblies for preloading
- Part 8: System HV - Hexagon fit bolt and nut assemblies
Boulonnerie de construction métallique à haute Hochfeste vorspannbare Garnituren für
résistance apte à la précontrainte - Partie 8 : Système Schraubverbindungen im Metallbau - Teil 8: System HV
HV - Boulons ajustés à tête hexagonale (vis + écrou) - Garnituren aus Sechskant-Passschrauben und
Muttern
This European Standard was approved by CEN on 15 October 2017.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC 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
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14399-8:2018 E
worldwide for CEN national Members.
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 6
2 Normative references . 6
3 Fit bolts . 7
3.1 Dimensions of fit bolts . 7
3.2 Specifications for fit bolts and reference standards . 10
3.3 Marking of fit bolts. 11
4 Nuts . 11
4.1 Dimensions of nuts . 11
4.2 Specification for nuts and reference standards . 13
4.3 Decarburization of the nut thread . 13
4.4 Marking of nuts . 13
5 Designation of the bolt/nut assemblies . 14
6 Associated washers . 14
7 Functional characteristics of the bolt/nut/washers assembly . 14
7.1 General . 14
) . 15
7.2 Maximum individual value of the bolt force during fitness for purpose test (Fbi max
7.3 Values of angle Δθ . 15
1
7.4 Values of angle Δθ . 15
2
7.5 Individual values of the k-factor (k ), mean value of the k-factor (k ) and coefficient
i m
of variation of the k-factor (V ) . 15
k
7.5.1 Individual values of the k-factor (k ) for k-class K1 . 15
i
7.5.2 Mean value of the k-factor (k ) and coefficient of variation of the k-factor (V ) for k-
m k
class K2 . 16
Annex A (normative) Clamp lengths and grip lengths . 17
Bibliography . 20
2
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
European foreword
This document (EN 14399-8:2018) has been prepared by Technical Committee CEN/TC 185
“Fasteners”, the secretariat of which is held by BSI.
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 January 2019 and conflicting national standards shall
be withdrawn at the latest by January 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN 14399-8:2007.
In comparison with EN 14399-8:2007, the following modifications have been made:
— Table 1 containing the overview of the composition of bolting assemblies and component marking
has been added;
— the coefficient of variation of the k-factor, V , was changed from 0,10 to 0,06;
k
— specifications for the designation of the bolting assemblies have been revised;
— Annex A with detailed specifications on clamp lengths and grip lengths has been added.
EN 14399 consists of the following parts, under the general title High-strength structural bolting
assemblies for preloading:
— Part 1: General requirements;
— Part 2: Suitability for preloading;
— Part 3: System HR — Hexagon bolt and nut assemblies;
— Part 4: System HV — Hexagon bolt and nut assemblies;
— Part 5: Plain washers;
— Part 6: Plain chamfered washers;
— Part 7: System HR — Countersunk head bolt and nut assemblies;
— Part 8: System HV — Hexagon fit bolt and nut assemblies;
— Part 9: System HR or HV — Direct tension indicators for bolt and nut assemblies;
— Part 10: System HRC — Bolt and nut assemblies with calibrated preload.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
3
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
Introduction
This document on structural bolting reflects the situation in Europe where two technical solutions exist
to achieve the necessary ductility of bolt/nut/washers assemblies. These solutions consist of two
different types (HR and HV) of bolt/nut/washer assemblies, see Table 1. Both types are well proven and
it is the responsibility of the experts using structural bolting whether they use the one or the other type.
It is, however, important for the performance of the assembly to avoid mixing up the components of
both types. Therefore, bolts and nuts for both types are standardized in one single part of this European
Standard each and the marking of the components of the bolting assemblies is uniform.
Preloaded bolted assemblies are very sensitive to differences in manufacture and lubrication.
Therefore, it is important that the bolting assemblies are supplied by one manufacturer, who is always
responsible for the functionality of the bolting assemblies as supplied.
For the same reason it is important that coating of the bolting assemblies is under the control of one
manufacturer.
Beside the mechanical properties of the components, the functionality of the bolting assemblies
requires that the specified preload can be achieved if the bolting assemblies are tightened with a
suitable procedure. For this purpose a test method for the suitability of the bolting assemblies for
preloading was created, which will demonstrate whether the functionality of the bolting assemblies is
fulfilled.
It should be pointed out that compared to ISO 272 the width across flats (large series) for M12 and M20
have been changed to 22 mm and 32 mm respectively. These changes are justified by the following
reasons.
Under the specific conditions of structural bolting, the compressive stresses under the bolt head or nut
for the sizes M12 may become too large with the width across flats of 21 mm, especially if the washer is
fitted eccentrically to the bolt axis.
For the size M20, the width across flats of 34 mm is very difficult to be produced. The change to 32 mm
is primarily motivated by economics but it should also be pointed out that the width across flats of
32 mm was already common practice in Europe.
4
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
Table 1 — Composition of high-strength structural bolting assemblies and component marking
Type of bolting assembly System HR System HV System HRC
General requirements EN 14399-1
Suitability for preloading EN 14399-2 and, if any, additional testing specified in the product standard
Bolt and nut EN 14399-3 EN 14399-7 EN 14399-4 EN 14399-8 EN 14399-10
Bolt HR8.8 HR10.9 HR8.8 HR10.9 HV10.9 HVP10.9 HRC10.9
HR8 HR8
Nut or HR10 or HR10 HV10 HV10 HR10 HRD10
HR10 HR10
a
EN 14399-5
a
Washer(s) EN 14399-5 or EN 14399-6 EN 14399-6
or EN 14399-6
b
H or HR
b b b
Marking H or H H or HV H or HR
c
or HD
Direct tension indicator
and nut face washer or EN 14399-9
bolt face washer, if any
Direct tension
H8 H10 H8 H10 H10
indicator
Not applicable
Nut face washer HN HN
Bolt face washer HB Not applicable HB
a
EN 14399-5 can only be used under the nut.
b
At the choice of the manufacturer.
c
Mandatory mark for washers with enlarged outer diameter according to EN 14399-5 only.
5
Marking Marking
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
1 Scope
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 width across flats, thread sizes M12 to M36 and property classes 10.9/10.
Bolting assemblies (including fit bolts with nominal shank diameter d + 1 mm) in accordance with this
1)
document have been designed to allow preloading of at least 0,7 f × A according to EN 1993-1-8
ub s
(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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 14399-1, High-strength structural bolting assemblies for preloading - Part 1: General requirements
EN 14399-2, High-strength structural bolting assemblies for preloading - Part 2: Suitability for preloading
EN 14399-6, High-strength structural bolting assemblies for preloading - Part 6: Plain chamfered washers
EN 14399-9, High-strength structural bolting assemblies for preloading - Part 9: System HR or HV - Direct
tension indicators for bolt and nut assemblies
EN 26157-1, Fasteners - Surface discontinuities - Part 1: Bolts, screws and studs for general requirements
(ISO 26157-1)
EN ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1: Bolts,
screws and studs with specified property classes - Coarse thread and fine pitch thread (ISO 898-1)
EN ISO 898-2, Mechanical properties of fasteners made of carbon steel and alloy steel - Part 2: Nuts with
specified property classes - Coarse thread and fine pitch thread (ISO 898-2)
EN ISO 3269, Fasteners - Acceptance inspection (ISO 3269)
EN ISO 4759-1, Tolerances for fasteners - Part 1: Bolts, screws, studs and nuts - Product grades A, B and C
(ISO 4759-1)
1) f is the nominal tensile strength (R ) and A is the nominal stress area of the bolt.
ub m s
6
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
EN ISO 6157-2, Fasteners - Surface discontinuities - Part 2: Nuts (ISO 6157-2)
EN ISO 10684, Fasteners - Hot dip galvanized coatings (ISO 10684)
ISO 261, ISO general purpose metric screw threads - General plan
ISO 965-2, ISO general purpose metric screw threads - Tolerances - Part 2: Limits of sizes for general
purpose external 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 Fit bolts
3.1 Dimensions of fit bolts
See Figure 1 and Table 2.
Key
a incomplete thread u ≤ 2P
b 15° to 30°
Figure 1 — Dimensions of fit bolts
The difference between l and l should not be less than 1,5 P.
g s
For coated bolts, the dimensions apply prior to coating.
7
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SIST EN 14399-8:2018
EN 14399-8:2018 (E)
Table 2 — Dimensions of fit bolts
Dimensions in millimetres
Thread d M12 M16 M20 M22 M24 M27 M30 M36
a
P 1,75 2 2,5 2,5 3 3 3,5 4
b (ref) 23 28 33 34 39 41 44 52
min. 0,4 0,4 0,4 0,4 0,4 0,4 0,4 0,4
c
max. 0,6 0,6 0,8 0,8 0,8 0,8 0,8 0,8
da max. 15,2 19,2 24,0 26,0 28,0 32,0 35,0 41,0
nom. 13 17 21 23 25 28 31 37
b
d min. 12,74 16,74 20,71 22,71 24,71 27,71 30,67 36,67
s
b
max. 12,85 16,85 20,84 22,84 24,84 27,84 30,83 36,83
min. 20,1 24,9 29,5 33,3 38,0 42,8 46,6 55,9
dw
c
max.
e min. 23,91 29,56 35,03 39,55 45,20 50,85 55,37 66,44
nom. 8 10 13 14 15 17 19 23
k min. 7,55 9,25 12,10 13,10 14,10 16,10 17,95 21,95
max. 8,45 10,75 13,90 14,90 15,90 17,90 20,05 24,05
k min. 5,28 6,47 8,47 9,17 9,87 11,27 12,56 15,36
w
r min. 1,2 1,2 1,5 1,5 1,5 2,0 2,0 2,0
max. 22 27 32 36 41 46 50 60
s
min. 21,16 26,16 31,00 35,00 40,00 45,00 49,00 58,80
y max. 6,5 7,5 8,5 8,5 10,0 10,0 11,5 13,0
d
l and l
s g
l
ls lg ls lg ls lg ls lg ls lg ls lg ls lg ls lg
nom. min. max. min. max. min. max. min. max. min. max. min. max. min. max. min. max. min. max.
50 48,75 51,25 20,5 27
55 53,50 56,50 25,5 32
60 58,50 61,50 30,5 37
65 63,50 66,50 35,5 4
...
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