iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
CEN

prEN 1337-7

(Main)

Structural bearings - Part 7: Spherical and cylindrical PTFE bearings

Structural bearings - Part 7: Spherical and cylindrical PTFE bearings

This document specifies rules for the design, manufacture and testing and of spherical and cylindrical sliding PTFE bearings.
It is applicable to spherical and cylindrical sliding bearings with an included angle up to 60° for spherical and 75° for cylindrical sliding bearings.
This document will be used in conjunction with the relevant parts of this standard series.

Lager im Bauwesen - Teil 7: Kalotten- und Zylinderlager mit PTFE

Dieses Dokument legt Regeln für die Bemessung, Herstellung und Prüfung von Kalotten- und Zylinderlagern mit PTFE fest.
Das Dokument gilt für Kalotten- und Zylinderlager mit einem enthaltenen Winkel von bis zu 60° für Kalottenlager und 75° für zylindrische Gleitlager.
Dieses Dokument wird in Kombination mit den anderen relevanten Teilen dieser Normenreihe verwendet.

Appareils d’appui structuraux - Partie 7 : Appareils d’appui cylindriques sphériques comportant du PTFE

Le présent document spécifie les règles de conception, d’essai et de fabrication d’appareils d’appui cylindriques et sphériques comportant du PTFE.
Il s’applique aux appareils d’appui cylindriques et sphériques avec un angle inscrit allant jusqu’à 60° pour les appareils d’appui sphériques et 75° pour les appareils d’appui cylindriques.
Ce document sera utilisé conjointement aux parties pertinentes de cette série de normes.

Konstrukcijska ležišča - 7. del: Sferična in cilindrična PTFE ležišča

General Information

Status
Not Published
Publication Date
02-Sep-2019
Withdrawal Date
02-Mar-2020
ICS
91.010.30 - Technical aspects
Technical Committee
CEN/TC 167 - Structural bearings
Drafting Committee
CEN/TC 167/WG 1 - Revision of EN 1337
Current Stage
4098 - Decision to abandon - Enquiry
Completion Date
18-Sep-2020
Directive
305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
89/106/EEC - Construction products
Mandate
M/104 - Mandate to CEN/CENELEC concerning the execution of standardization work for harmonized standards on structural bearings
Ref Project
oSIST prEN 1337-7:2018 - Structural bearings - Part 7: Spherical and cylindrical PTFE bearings

Relations

Revises
EN 1337-7:2004 - Structural bearings - Part 7: Spherical and cylindrical PTFE bearings
Effective Date
19-Jan-2023

Buy Standard

prEN 1337-7:2018prEN 1337-7:2018
PreviousNext
Draft
prEN 1337-7:2018
English language
24 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI STANDARD
01-marec-2018
.RQVWUXNFLMVNDOHåLãþDGHO6IHULþQDLQFLOLQGULþQD37)(OHåLãþD
Structural bearings - Part 7: Spherical and cylindrical PTFE bearings
Lager im Bauwesen - Teil 7: Kalotten- und Zylinderlager mit PTFE
Ta slovenski standard je istoveten z: prEN 1337-7
ICS:
91.010.30 7HKQLþQLYLGLNL Technical aspects
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

DRAFT
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM
January 2018
ICS 91.010.30 Will supersede EN 1337-7:2004
English Version
Structural bearings - Part 7: Spherical and cylindrical PTFE
bearings
Lager im Bauwesen - Teil 7: Kalotten- und
Zylinderlager mit PTFE
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 167.
If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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.
Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.

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. prEN 1337-7:2018 E
worldwide for CEN national Members.

Contents Page
European foreword . 4
1 Scope . 5
2 Normative references . 5
3 Terms , definitions and symbols . 5
3.1 Terms and definitions . 5
3.2 Symbols . 6
4 Types of spherical and cylindrical bearings . 7
4.1 General . 7
4.2 Spherical bearings . 7
4.3 Cylindrical bearings . 8
5 Materials . 9
6 Design . 9
6.1 General . 9
6.2 Design verification for curved sliding surfaces . 9
6.3 Eccentricities . 10
6.3.1 General . 10
6.3.2 Eccentricity due to frictional resistance . 10
6.3.3 Rotation . 11
6.3.4 Lateral forces . 11
6.3.5 Eccentricity along the cylindrical axis . 11
6.4 Compressive stress verification . 11
6.5 Rotation capacity . 12
6.6 Separation of sliding surfaces. 12
6.7 Design details . 12
6.7.1 Curved PTFE sheets . 12
6.7.2 Backing plates . 12
6.7.3 Restraining ring . 13
6.8 Combination with other bearings or elements . 13
7 Testing . 13
8 Manufacturing, assembly, tolerances, marking and labelling . 14
9 Transport, storage and installation . 14
10 In service inspection . 14
11 Maintenance . 14
12 AVCP . 14
Annex A (informative) Reduced area for curved sliding surfaces . 15
A.1 General . 15
A.2 Modelling assumptions . 15
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 18
ZA.1 Scope and relevant characteristics . 18
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 20
ZA.3 Assignment of AVCP tasks . 20

European foreword
This document (prEN 1337-7:2018) has been prepared by Technical Committee CEN/TC 167
“Structural bearings”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 1337-7:2004.
This document has been prepared under a mandate given to CEN by the European Commission and the
European Free Trade Association, and supports essential requirements of EU Regulation 305/2011.
For relationship with EU Regulation 305/2011, see informative Annex ZA, which is an integral part of
this document.
prEN 1337, Structural bearings, consist of the following 8 parts:
— Part 1: General;
— Part 2: Sliding elements;
— Part 3: Elastomeric bearings;
— Part 4: Roller bearings;
— Part 5: Pot bearings;
— Part 6: Rocker bearings;
— Part 7: Spherical and cylindrical PTFE bearings;
— Part 8: Guide bearings and Restraint bearings.
The major technical changes are listed below:
— Complete technical and editorial revision of the document; it is not possible to list all implemented
changes to this edition of EN 1337-7.
1 Scope
This document specifies rules for the design, manufacture and testing and of spherical and cylindrical
sliding PTFE bearings.
It is applicable to spherical and cylindrical sliding bearings with an included angle up to 60° for
spherical and 75° for cylindrical sliding bearings.
This document will be used in conjunction with the relevant parts of this standard series.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.
prEN 1337-1:2018, Structural bearings — Part 1: General
prEN 1337-2:2018, Structural bearings — Part 2: Sliding elements
prEN 1337-5:2018, Structural bearings — Part 5: Pot bearings
EN 1993 (all parts), Eurocode 3: Design of steel structures
3 Terms , definitions and symbols
3.1 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1.1
backing plate
metallic component which supports sliding materials
3.1.2
cylindrical PTFE bearing
bearing consisting of a backing plate with a convex cylindrical surface (rotational element) and a
backing plate with a concave cylindrical surface between which a PTFE sheet and the mating material
form a curved sliding surface (see Figure 3)
Note 1 to entry: Cylindrical PTFE bearings are also used in combination with flat sliding elements and guides to
form free or guided bearings (see Figure 4)
3.1.3
guide
sliding element which restrains a sliding bearing from moving in one axis
3.1.4
lubricant
special grease used to reduce the friction and wear in the sliding surfaces
3.1.5
mating surface
hard smooth metallic surface in contact with the sliding material (PTFE, CM1 or CM2)
3.1.6
Polytetrafluoroethylene
PTFE
thermoplastic material used for its low coefficient of friction
3.1.7
sliding materials
materials which form sliding surfaces
3.1.8
sliding surface
combination of a pair of flat or curved surfaces of different materials which allow relative
displacements
3.1.9
spherical PTFE bearing
bearing consisting of a backing plate with a convex spherical surface (rotational element) and a backing
plate with a concave spherical surface between which a PTFE sheet and the mating material form a
curved sliding surface (see Figure 1)
Note 1 to entry: Spherical PTFE bearings are also used in combination with flat sliding elements and guides to
form free or guided bearings (see Figure 2).
3.2 Symbols
The most frequently occurring symbols are defined below. Those that are local, and unique to a
particular clause, are defined at their first appearance.
A contact area 2
mm
d diameter, diagonal, depth mm
e eccentricity mm
f tensile or compressive strength MPa
l contact length of the PTFE in cylindrical bearings mm
N axial force; force normal to principal bearing surface N; kN
r radius of the curved contact surface mm
t thickness mm
V transverse or shear force N; kN
µ coefficient of friction —
α angle of rotation rad
β deviation angle from vertical axis of the line of action of the applied load
γ partial factor —
λ ratio, coefficient —
θ included angle of the spherical or cylindrical surface °
Indices
b backing plate
max maximum —
min minimum
red reduced
tot total —
x, y, z coordinates —
PTFE Polytetrafluoroethylene
4 Types of spherical and cylindrical bearings
4.1 General
Spherical and cylindrical bearings
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

CEN
EN 1337-8:2007(Main)
Structural bearings - Part 8: Guide Bearings and Restraint Bearings
SIST EN 1337-8:2008

This Part of this European Standard deals with the requirements for the design and manufacture of Guide Bearings and Restraint Bearings.
Guide Bearings and Restraint Bearings are not intended to transmit vertical loads but they may be combined in one unit with bearings in accordance. EN 1337-1:2000, Table 1.
NOTE 1   Guide Bearings and Restraint Bearings are shown in EN 1337-1:2000, Table 1, No. 8.1 and 8.2. For combined bearings see EN 1337-1:2000, Table 1, bearing Nos. 1.2, 1.3, 1.6, 1.7, 1.8., 3.1, 4.1, 4.2, 4.3, 7.1, 7.3, and 7.4 with restraints and Nos. 1.5, 1.7, 2.2, 3.3, 3.4, 5.2, 6.2 and 7.3 with guides.
NOTE 2   Examples of combined bearings are given in Annex B.
The minimum operating temperature depends on the materials’ properties used at the required temperature and the limitations given in the referenced parts of this European Standard.
NOTE 3   In certain circumstances the bearings described in this part of this European Standard may be required to operate in a plane inclined to the horizontal. In such circumstances the terms "vertical" and "horizontal" should be interpreted appropriately.

  • Standard
    26 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-4:2004/AC:2007(Corrigendum)
Structural bearings - Part 4: Roller bearings
SIST EN 1337-4:2004/AC:2007

TC - Modification to 6.7.1

  • Corrigendum
    2 pages
    English, French and German language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-5:2005(Main)
Structural bearings - Part 5: Pot bearings
SIST EN 1337-5:2005

This part of EN 1337 specifies the requirements for the design and manufacture of pot bearings which will be used for operating temperatures between - 40 °C and 50 °C.
This part of EN 1337 does not apply to pot bearings made with other materials than those specified in clause 5.
Bearings which are subjected to rotation ad greater than 0,030 rad (see Figure 2) under the characteristic combination of actions or which incorporate elastomeric pads larger than 1500 mm in diameter are beyond the scope of this document.
Depending on the climatic region where the construction work is located the bearings can be designed to one of the following classes related to minimum operating temperatures (the minimum shade air temperatures): - 25 °C or - 40 °C.
When required to accommodate translational movements, pot bearings may be combined with sliding elements in accordance with EN 1337-2.
NOTE   The minimum shade air temperature for a location should be obtained from meteorological data appropriate to a 120 year return period. Consideration should be given to adjustment of this temperature for height and local divergence such as frost pockets and sheltered low-lying areas if the data obtained applies to a general area rather than to a specific location.

  • Standard
    56 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-3:2005(Main)
Structural bearings - Part 3: Elastomeric bearings
SIST EN 1337-3:2005

This part of EN 1337 applies to elastomeric bearings with or without complementary bearing devices to extend their field of use such as flat sliding elements covered by EN 1337-2 or sliding surface described in 4.4.4, as used in bridge structures or any other structure with comparable support conditions.
This part of EN 1337 applies to elastomeric bearings with dimensions in plan up to (1200 x 1200) mm and does not cover elastomeric bearings made with other elastomers materials than those specified in 4.4.1. It applies to laminated bearings types A, B, C, laminated sliding bearings types E and D, plain pad and strip bearings type F.
This part deals with bearings for use in operating temperatures ranging from - 25 °C to + 50 °C and for short periods up to + 70 °C.
It is recognised that the air temperature in some regions of Northern Europe is lower than -25 °C.
In this case of very low operating temperature (down to - 40 °C), it is essential that bearing characteristics comply also with the shear modulus at very low temperature (see 4.3.1.3. and annex F)

  • Standard
    94 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-6:2004(Main)
Structural bearings - Part 6: Rocker bearings
SIST EN 1337-6:2004

This part of EN 1337 specifies the requirements for the design and manufacture of rocker bearings. In order to accommodate displacements rocker bearings can be combined with a sliding element in accordance with EN 1337-2. Bearings which are subjected to rotation greater than 0,05 rad resulting from the characteristic combination of actions are outside the scope of this part of EN 1337. This part of EN 1337 does not apply to rocker bearings made with materials other than those specified in clause 5.

  • Standard
    28 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-4:2004(Main)
Structural bearings - Part 4: Roller bearings
SIST EN 1337-4:2004

This part of EN 1337 specifies the requirements for the design and manufacture of single and multiple roller bearings, in which the roller axis is horizontal. In order to accommodate displacements parallel to the roller axis roller bearings can be combined with sliding elements in accordance with EN 1337-2.  To permit rotation about the axis perpendicular to the roller axis or about both axes, as for multiple roller bearings, the roller bearings can be combined with bearings from other parts of EN 1337.
This part of EN 1337 does not apply to roller bearings made with materials other than those specified in clause 5.
Bearings which are subjected to rotation greater than 0,05 rad resulting from the characteristic combination of actions are outside the scope of this part of EN 1337.

  • Standard
    31 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-2:2004(Main)
Structural bearings - Part 2: Sliding elements
SIST EN 1337-2:2004

This European Standard specifies the characteristics for the design and manufacture of sliding elements and guides which are not structural bearings but only parts of them for combination with structural bearings as defined in other Parts of this European Standard.
Suitable combinations are shown in Table 1 of EN 1337-1:2000.
Sliding surfaces with a diameter of the circumscribing circle of single or multiple PTFE sheets less than 75 mm or greater than 1500 mm, or with effective bearing temperatures less than -35°C or greater than 48°C are outside the scope of this European Standard.
Sliding elements for use as temporary devices during construction, for example during launching of the superstructure, are also outside the scope of this European Standard.
In this standard the specification is also given for curved sliding surfaces which are not part of separate sliding elements but which are incorporated in cylindrical or spherical PTFE bearings as per EN 1337.
NOTE     The general principles detailed in this European Standard may be applied for sliding elements outside this scope, but their suitability for the intended use should be proven.

  • Standard
    70 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-7:2004(Main)
Structural bearings - Part 7: Spherical and cylindrical PTFE bearings
SIST EN 1337-7:2004

This European Standard deals with the requirements for the design and manufacture of spherical and cylindrical PTFE bearings. The requirements and properties of the curved sliding surfaces are included in
EN 1337-2. Spherical and cylindrical bearings with an included angle 2 q > 60° and 2 q > 75° respectively are beyond the scope of this European Standard. (see Figure 6).
For the purpose of controlling the degree of freedom the bearings may be combined with flat sliding elements and guides according to EN 1337-2:2004 and restraining rings as per 6.3.4.
Cylindrical bearings are susceptible to unexpected moments about the transverse axis of the cylindrical surface.
Additional limitation of application to be taken into consideration is given in clause 1 of EN 1337-2:2004.

  • Standard
    25 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-10:2003(Main)
Structural Bearings - Part 10: Inspection and maintenance
SIST EN 1337-10:2003

This European Standard applies to the inspection and main-tenance of bearings designed in accord-ance with EN 1337-1, when used in the construction of bridges or struc-tures requiring similar bearing sys-tems. It presupposes the existence of guidelines for the regular inspection of the whole structure during its service life.
It may also be used as appropriate for the inspection and maintenance of bearings designed and/or installed before the intro-duction of this European Standard.
This European Standard specifies the aspects of each type of bearing that shall be inspected and recorded. It does not specify permissible values. For these reference shall be made to the relevant parts of this European Standard and to the drawings and design calculations for the bearing and the structure.
NOTE 1   Attention is drawn to the par-ticular necess-ity for regular inspection and main-ten-ance of bearings as, with-out such inspection and mainten-ance, premature failure may occur.
NOTE 2   National regulations may exist on the subjects covered by this European Standard and, therefore, they prevail on it.

  • Standard
    17 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CEN
EN 1337-1:2000(Main)
Structural bearings - Part 1: General design rules
SIST EN 1337-1:2001

This European Standard is applicable to structural bearings, whether used in bridges or in other structures. This European Standard does not cover: a) bearings that transmit moments as a primary function; b) bearings that resist uplift; c) bearings for moving bridges; d) concrete hinges; e) seismic devices. Although it is not intended to regulate temporary bearings, this standard may be used as a guide in this case (temporary bearings are bearings used during construction or repair and maintenance of structures).

  • Standard
    32 pages
    English language
    sale 10% off
    e-Library read for
    1 day