prEN 1337-3
(Main)Structural bearings - Part 3: Elastomeric bearings
Structural bearings - Part 3: Elastomeric bearings
This document specifies rules for the design, testing and manufacture of laminated elastomeric bearings, elastomeric plain pad bearings, elastomeric strip bearings and sliding elastomeric bearings.
It is applicable to laminated and plain pad bearings:
- of rectangular and circular shape in plan with a rectangular cross-section, with dimensions in plan up to 1 200 mm,
- subjected to temperatures between -25 °C and +50 °C or between -40 °C and +50 °C,
- subjected to temperatures below -25 °C due to climate changes,
- subjected to temperatures up to 70 °C for repeated periods of less than 8 h.
This document will be used in conjunction with prEN 1337-1:2018 and other relevant parts of the EN 1337 series.
Lager im Bauwesen - Teil 3: Elastomerlager
Dieses Dokument legt die Regeln für die Bemessung, Prüfung und Herstellung bewehrter Elastomerlager, unbewehrter Elastomerlager, Elastomerstreifenlager und Verformungsgleitlager fest.
Das Dokument gilt für bewehrte und unbewehrte Elastomerlager:
- mit rechteckiger oder runder Grundform mit rechteckigem Querschnitt und ebenen Abmessungen von bis zu 1 200 mm,
- die Temperaturen zwischen −25 °C und +50 °C oder zwischen −40 °C und +50 °C ausgesetzt sind,
- die Temperaturen unter −25 °C aufgrund klimatischer Veränderungen ausgesetzt sind,
- die für wiederholte Zeiträume von weniger als 8 h Temperaturen von bis zu 70 °C ausgesetzt sind.
Dieses Dokument wird in Kombination mit prEN 1337 1:2018 und anderen relevanten Teilen der Normenreihe EN 1337 verwendet.
Élément central - Partie 3 : Titre de la partie
Le présent document spécifie les règles de conception, d’essai et de fabrication d’appareils d’appui en
élastomère laminés, non frettés, en bande et avec éléments de glissement.
Il est applicable aux appareils d’appui laminés et non frettés :
- de forme rectangulaire et circulaire, dans un plan et de section droite rectangulaire, leurs
dimensions en plan pouvant atteindre 1 200 mm ;
- soumis à des températures comprises entre –25 °C et +50 °C ou entre –40 °C et +50 °C ;
- soumis à des températures inférieures à –25 °C par suite de changements climatiques ;
- soumis à des températures pouvant atteindre 70 °C pendant des périodes répétées durant moins de
8 h.
Le présent document sera utilisé en association avec le document prEN 1337-1:2018 et les autres
parties pertinentes de la série EN 1337.
Konstrukcijska ležišča - 3. del: Elastomerna ležišča
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-marec-2018
.RQVWUXNFLMVNDOHåLãþDGHO (ODVWRPHUQDOHåLãþD
Structural bearings - Part 3: Elastomeric bearings
Lager im Bauwesen - Teil 3: Elastomerlager
Ta slovenski standard je istoveten z: prEN 1337-3
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 1337-3:2005
English Version
Structural bearings - Part 3: Elastomeric bearings
Lager im Bauwesen - Teil 3: Elastomerlager
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 1337-3:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions, symbols and abbreviations . 8
3.1 Terms and definitions . 8
3.2 Symbols . 9
4 Types of elastomeric bearings . 13
4.1 General . 13
4.2 Laminated bearings . 13
4.2.1 General . 13
4.2.2 Type A . 14
4.2.3 Type B . 14
4.2.4 Type C . 15
4.2.5 Laminated bearings with sliding elements . 15
4.3 Plain pads or strip bearings . 17
5 Material properties . 17
5.1 General . 17
5.2 Characteristics of the elastomer . 17
5.3 Steel reinforcing plates . 19
6 Design . 19
6.1 General . 19
6.2 Parameters . 19
6.2.1 Shear modulus . 19
6.2.2 Bulk modulus . 20
6.3 Laminated bearings . 20
6.3.1 Basis of design . 20
6.3.2 Effective area . 20
6.3.3 Shape factor . 21
6.3.4 Behaviour under vertical load. 21
6.3.5 Behaviour under horizontal loads . 23
6.3.6 Behaviour under rotations . 24
6.3.7 Rotational limitation . 26
6.3.8 Strain combination criterion . 26
6.4 Design of plain pad and strip bearings . 26
6.4.1 Basis of design . 26
6.4.2 Effective thickness . 27
6.4.3 Reduced area . 27
6.4.4 Shape factor . 27
6.4.5 Behaviour under vertical load. 27
6.4.6 Behaviour under horizontal load . 28
6.4.7 Behaviour under rotations and design strain . 29
6.5 Combination with other bearings or elements . 30
7 Testing . 30
7.1 General . 30
7.2 Behaviour under shear . 30
7.2.1 General . 30
7.2.2 Shear modulus at ambient temperature . 30
7.2.3 Shear modulus at low temperature . 31
7.2.4 Shear modulus after ageing . 31
7.2.5 Shear modulus for plain pad bearings . 31
7.3 Shear bond strength . 31
7.3.1 General . 31
7.3.2 Shear bond strength at ambient temperature . 31
7.3.3 Shear bond strength after ageing . 31
7.4 Behaviour under compression . 32
7.4.1 Test procedures . 32
7.4.2 Type test (level 1 of testing method) . 32
7.4.3 FPC compression test (level 2 of the testing method) . 32
7.4.4 Quick production test (level 3 of the testing method) . 32
7.5 Resistance to repeated loading in compression . 33
7.6 Rotation behaviour . 33
8 Manufacturing, assembly, tolerances, marking and labelling . 33
8.1 External dimensions . 33
8.1.1 General . 33
8.1.2 Plan size of the bearing . 33
8.1.3 Thickness of the bearing . 33
8.1.4 Parallelism of external faces . 33
8.1.5 Flatness. 34
8.2 Internal dimensions . 34
8.2.1 General . 34
8.2.2 Internal elastomer layers . 34
8.2.3 External elastomer layers . 34
8.2.4 Steel reinforcing plates . 35
8.3 Marking and labelling . 35
8.4 Surfaces . 35
9 Transport, storage and installation . 35
10 In-service inspection . 36
11 Maintenance . 36
12 Assessment and verification of constancy of performance . 36
12.1 General . 36
12.2 Type Testing . 36
12.3 Factory production control . 36
12.4 Assessment of the performance of the construction product . 37
Annex A (informative) Shear modulus . 40
A.1 General . 40
A.2 Shear modulus and hardness . 40
A.3 Low temperature stiffening effects low temperatures . 40
Annex B (normative) Shear modulus test method . 41
B.1 General . 41
B.2 Low temperature test . 41
B.3 Very low temperature test . 41
B.4 Test after ageing . 41
B.5 Test methods . 41
B.5.1 General . 41
B.5.2 Method A. 42
B.5.3 Method B. 46
Annex C (normative) Shear bond test method . 50
C.1 General . 50
C.2 Test after ageing . 50
C.3 Test methods . 50
C.3.1 General . 50
C.3.2 Method A. 50
C.3.3 Method B. 52
Annex D (normative) Compression test method for laminated bearings . 55
D.1 General . 55
D.2 Equipment . 55
D.2.1 General . 55
D.2.2 Dimensions of the undeformed test specimen . 55
D.2.3 Conditioning of test specimen . 55
D.2.4 Testing procedure . 55
D.3 Results . 56
D.3.1 Visual examination . 56
D.3.2 Compressive strain (Levels 1 and 2) . 56
D.3.3 Compression stiffness . 56
D.3.4 Secant compression modulus (Level 1) . 57
D.4 Test report . 57
Annex E (normative) Repeated Loading Compression Test Method . 59
E.1 Scope . 59
E.2 Principle . 59
E.3 Equipment . 59
E.4 Test specimens . 60
E.4.1 Dimensions . 60
E.4.2 Temperature control . 60
E.4.3 Conditioning of test specimens . 60
E.4.4 Testing procedure . 60
E.5 Results . 60
E.6 Test report . 60
Annex F (normative) Eccentric loading test method . 62
F.1 General . 62
F.2 Test method . 62
F.3 Testing equipment . 62
F.4 Determination of Dimensions . 62
F.5 Conditioning of test specimens . 63
F.6 Testing procedure . 63
F.6.1 Contact area with a given eccentric loading . 63
F.6.2 Degree of eccentricity with full contact area . 63
F.7 Results . 63
F.8 Test report . 63
Annex G (normative) Restoring Moment Test Method . 65
G.1 General . 65
G.2 Test methods . 65
G.2.1 General . 65
G.2.2 Method A. 65
G.2.3 Method B. 67
Annex H (informative) Common sizes for bearings type B . 69
Annex I (informative) Force deflection relationship for laminated bearings . 71
Annex J (informative) Reaction to rotation for elastomeric bearings . 72
Annex ZA (informative) Relationship of this European Standard with Regulation (EU)
No.305/2011 . 73
ZA.1 Scope and relevant characteristics . 73
ZA.2 System of Assessment and Verification of Constancy of Performance (AVCP) . 77
ZA.3 Assignment of AVCP tasks . 77
Bibliography . 83
European foreword
This document (prEN 1337-3:2018) 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 1337-3:2005.
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, consists 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 whole document; it is not possible to list all
implemented changes to this edition of EN 1337-3.
1 Scope
This document specifies rules for the design, testing and manufacture of laminated elastomeric
bearings, elastomeric plain pad bearings, elastomeric strip bearings and sliding elastomeric bearings.
It is applicable to laminated and plain pad bearings:
— of rectangular and circular shape in plan with a rectangular cross-section, with dimensions in plan
up to 1 200 mm,
— subjected to temperatures between –25 °C and +50 °C or between –40 °C and +50 °C,
— subjected to temperatures below –25 °C due to climate changes,
— subjected to temperatures up to 70 °C for repeated periods of less than 8 h.
This document will be used in conjunction with prEN 1337-1:2018 and other relevant parts of the
EN 1337 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
EN 1990:2002 , Eurocode — Basis of structural design
EN 1993-2:2006, Eurocode 3 — Design of steel structures — Part 2: Steel Bridges
EN 1993 (all parts), Eurocode 3: Design of steel structures
EN 10025 (all parts), Hot rolled products of structural steels
EN 10029, Hot-rolled steel plates 3 mm thick or above — Tolerances on dimensions and shape
EN 10088 (all parts), Stainless steels
EN 10204:2004, Metallic products — Types of inspection documents
EN ISO 7500-1:2015, Metallic materials — Calibration and verification of static uniaxial testing
machines — Part 1: Tension/compression testing machines — Calibration and verification of the force-
measuring system (ISO 7500-1:2015)
ISO 34-1:2010, Rubber, vulcanized or thermoplastic — Determination of tear strength — Part 1: Trouser,
angle and crescent test pieces
ISO 37:2011, Rubber, vulcanized or thermoplastic — Determination of tensile stress-strain properties
This reference is currently impacted by EN 1990:2002/A1:2005 and EN 1990:2002/A1:2005/AC:2010.
ISO 48, Rubber, vulcanized or thermoplastic — Determination of hardness (hardness between 10 IRHD
and 100 IRHD)
ISO 188, Rubber, vulcanized or thermoplastic — Accelerated ageing and heat resistance tests
ISO 815-1:2008, Rubber, vulcanized or thermoplastic — Determination of compression set — Part 1: At
ambient or elevated temperatures
ISO 1431-1, Rubber, vulcanized or thermoplastic — Resistance to ozone cracking — Part 1: Static and
dynamic strain testing
ISO 1827:2011, Rubber, vulcanized or thermoplastic — Determination of shear modulus and adhesion to
rigid plates — Quadruple-shear methods
3 Terms, definitions, symbols and abbreviations
3.1 Terms and definitions
For the purposes of this document, the terms and definitions given in prEN 1337-1:2018 and the
following 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
batch
individual mix or blend of mixes of elastomer, if used for bearing production or a number of identical
components produced at the same machine setting
3.1.2
elastomer
macromolecular material, which returns to approximately its initial dimensions and shape after
substantial deformation by a weak stress and release of stress
3.1.3
elastomeric bearing
bearing comprising a element of vulcanised elastomer that may be reinforced with one or more steel
plates
3.1.4
laminated bearing
elastomeric bearing reinforced internally with one or more steel plates, chemically bonded during
vulcanisation
3.1.5
plain pad bearing
elastomeric bearing consisting of a solid element of vulcanized elastomer without internal cavities
3.1.6
sliding elastomeric bearing
laminated bearing which incorporates a sliding element
3.1.7
sliding plate
component which bears on and is immediately adjacent to the top sliding surface of a bearing
Note 1 to entry: It can be:
a) a single piece of austenitic steel,
b) a thin plate of austenitic steel fixed to a mild steel backing plate,
c) a thin plate of austenitic steel bonded to an elastomeric interlayer which is vulcanised to a mild steel backing
plate.
3.1.8
strip bearing
plain pad bearing acting as a linear support covered by the specifications given for plain pad bearings
3.1.9
sliding surface
external layer vulcanised onto an elastomeric bearing, in contact with the sliding plate which allows
relative translational displacement
3.1.10
effective area
plan area of the elastomer in common with the steel plate, including the area of any manufacturing
holes (which are later effectively plugged)
3.1.11
reduced area
common area of the effective area at the top reinforcing plate projected on the effective area of the
bottom reinforcing plate
3.2 Symbols
For the purposes of this document, the following symbols and abbreviations apply.
3.2.1 Latin upper case letters:
A Overall plan area of elastomeric bearing 2
mm
A Effective plan area of laminated bearing (area of the steel reinforcing plates 2
eff mm
excluding the area of any holes if these are not later effectively plugged)
A Reduced effective plan area of elastomeric bearing 2
eff;red mm
C Compressive stiffness of a bearing MPa
E Modulus of elasticity MPa
E Bulk modulus MPa
b
E Secant compression modulus MPa
cs
E Internal design load effects arising from actions and imposed deformations MPa
d
F Force MPa
F Internal Force, generated by shear deformation MPa
xy
V , Horizontal design forces N
x;d
V
y;d
V Resultant horizontal design force obtained by vectorial addition of forces in x N
xy;d
and y direction
N Vertical design force MPa
z;d
G Nominal value of conventional shear modulus of elastomeric bearing MPa
nom
G Conventional shear modulus of elastomeric bearing under dynamic actions MPa
dyn
G Shear modulus of elastomer MPa
el
G Design shear modulus of elastomer or shear modulus of elastomer for design MPa
d
purposes
G Conventional shear modulus of elastomeric bearing determined by testing MPa
exp
M Moment caused by the friction force in the cylindrical or spherical bearing Nmm
f
used for the restoring moment test
M Experimental value of restoring moment Nmm
rt;exp
M Design value of restoring moment Nmm
rt;d
R Design value of resistance
d
R Experimental minimum tear resistance N/mm
t,exp
S Shape factor –
V Resultant of the forces reacting to translational movements in x and y N
xy;Sd
direction
T Temperature °C
3.2.2 Latin lower case letters:
a Minor dimension of rectangular bearing mm
a Effective width of laminated bearing (width of the steel reinforcing plates) mm
eff
a Effective length of lever arm in restoring moment test mm
b Major dimension of rectangular bearing mm
b Effective length of laminated bearing (length of the steel reinforcing plates) mm
eff
c Compression stiffness N/m
d diameter of circular bearing mm
d Effective diameter of circular laminated bearing mm
eff
e Eccentricity of vertical force mm
f Tensile strength 2
u N/mm
f Yield stress 2
y N/mm
h Average total initial thickness of bearing ignoring top and bottom covers mm
m0;tot;ne
tto
h Mean total initial thickness of bearing mm
m0;tot
h Sum of the elastomer layer nominal thicknesses participating in the shear mm
m0;tot;eff
deformation, including the top and bottom layers in the unloaded condition
h Nominal total thickness of bearing mm
nom;tot
h Total nominal thickness of elastomer in a bearing mm
nom;tot;el
k Factor for dynamic behaviour of elastomer –
dyn
k Friction factor –
f
k Factor for induced tensile stresses in reinforcing plate –
N;t
k Moment factor –
M
k Stress correction factor for the steel reinforcing plates –
cor
k Rotation factor –
rot
k Correction factor related to the shear modulus –
G
k Shape factor for the internal layer –
Si
k Factor for restoring moment –
M;rt
k Factor for temperature effects on elastomer –
temp
u Force free perimeter of the steel reinforcing plates including that of any holes if mm
st
these are not later effectively plugged.
n Number of elastomer layers –
t Thickness of plain pad bearing mm
el
t Effective thickness of elastomer in compression mm
el;eff
t Thickness of an individual elastomer layer in a laminated bearing mm
el;i
t Thickness of PTFE sheet mm
PTFE
t Thickness of steel reinforcing plate mm
s
t Thickness of outer steel reinforcing plate mm
s;o
w Total vertical deflection mm
tot
u Horizontal relative displacement in direction of dimension a mm
a
u Horizontal relative displacement in direction of dimension b mm
b
u Vertical movement mm
z
w Deflection in vertical direction mm
w Vertical deflection of individual elastomer layer mm
i
u Resultant horizontal relative design displacement obtained by vectorial mm
ab
addition of u and u
a b
3.2.3 Greek letters:
α Angular rotation of a bearing rad
α Angular rotation about an axis parallel to side “a” of a rectangular bearing rad
a
α Angular rotation about an axis parallel to side “b” of a rectangular bearing rad
b
α Angular rotation about the diameter d of a circular bearing rad
d
γ Partial factor for the resistance of the material –
m
ε Design strain in elastomer slab due to angular rotation –
α;d
ε Design strain in elastomer slab due to compressive loads –
c;d
ε Design shear strain in elastomer slab due to translational movements in –
a;d;εb;d
direction of the a respectively b dimension
ε Elongation at break –
u
ε Shear strain of the bearing –
q
ε Compressive strain of a bearing –
z
μ Friction coefficient for elastomer –
el
σ Compressive stress for concrete 2
c N/mm
σ Average of the compressive stress for concrete 2
c;m N/mm
σ Tensile and compressive stress for steel 2
s N/mm
τ Shear stress 2
N/mm
3.2.4 Subscripts:
a in direction of side with dimension a, in the vertical plane through side a –
b in direction of side with dimension b, in the vertical plane through side b –
c concrete; compression –
d Design –
dyn Dynamic –
exp Experimental
min Minimum
max Maximum
tot Total –
u At Ultimate Limit State –
x, y, z In direction of x-, y-, z-axis –
3.2.5 Abbreviations:
CR Polychloroprene rubber
NR Natural rubber
pphm Parts per hundred million by volume
PTFE Polytetrafluoroethylene
SLS Serviceability Limit State
ULS Ultimate Limit State
4 Types of elastomeric bearings
4.1 General
Elastomeric bearings shall be designed and manufactured to transmit and resist the specified forces
(Load bearing capacity) and to accommodate translational movements in any direction (horizontal
distortion capability) and rotational movements about any axis (Rotation capacity) by elastic
deformation. They can be combined with complementary bearing devices to extend their field of use,
e.g. sliding or restraining elements.
Features of types A to E (see 4.2) can be combined.
The horizontal distortion capability is expressed as shear strain limit, see 6.3.5.1 and 6.4.6.1.
Although elastomeric bearings are designed to accommodate shear movements, they shall not be used
to provide resistance to a permanently applied external shear force.
NOTE Although elastomer is a nonlinear viscoelastic material, for some design rules a simplified but
conservative linear approach for the modelling of the bearing behaviour is used.
4.2 Laminated bearings
4.2.1 General
Usually bearings are rectangular or circular in plan.
The nominal thickness of the internal elastomeric layers shall be at least 5 mm and a maximum of
25 mm. All internal layers shall have the same nominal thickness. The nominal edge cover thickness
shall be 5 mm. The top and bottom cover thickness shall be at least 2,5 mm.
For laminated bearings it is permissible to reduce the loaded area, without changing the plan
dimensions, by including holes of uniform section in the loaded area.
Key
1 edge cover
2 top and bottom cover
Figure 1 — Example of a typical cross-section of an elastomeric bearing
4.2.2 Type A
This is a laminated bearing fully covered with elastomer comprising only one steel reinforcing plate
(see Figure 2).
Key
1 elastomeric material
2 reinforcing plate
Figure 2 — Type A
4.2.3 Type B
This is a laminated bearing fully covered with elastomer comprising at least two steel reinforcing plates
(see Figure 3). Common sizes for bearings type B are given in Annex H.
Key
1 elastomeric material
2 reinforcing plate
Figure 3 — Type B
4.2.4 Type C
Type B bearing with one or two outer steel plates vulcanised to the elastomer, which are profiled or
allow alternative methods of fixing (see Figure 4).
Key
1 outer steel plate
2 elastomeric bearing
Figure 4 — Examples of Type C
4.2.5 Laminated bearings with sliding elements
4.2.5.1 General
Elastomeric bearings may be combined with sliding elements to provide a movement range larger than
would be available solely from the shear deflection of the elastomer.
Elastomeric bearings may be combined with guides or restraints to restrain the movement in one or
two axes.
The sliding elements including guides and restraints shall be in accordance with prEN 1337-2:2018.
4.2.5.2 Type D
A Type A, Type B or Type C combined with a sliding element (see Figure 5). The sliding element shall be
in accordance with prEN 1337-2:2018. The PTFE sheet can be dimpled or undimpled.
a) Austenitic steel sheet connected to backing b) Austenitic steel sheet connected to backing
plate by means of vulcanization plate by means of screws, rivets, welds or
bonding agent
Key
1 backing plate for stainless steel,
2 elastomeric layer,
3 austenitic steel sheet,
4 bonded PTFE sheet
5 elastomeric bearing
Figure 5 — Examples of Type D
4.2.5.3 Type E
Type C with sliding element (see Figure 6). The sliding element shall be in accordance with
prEN 1337-2:2018.
Key
1 backing plate for stainless steel,
2 elastomeric layer,
3 austenitic steel sheet,
4 PTFE sheet
5 elastomeric bearing
6 backing plate for PTFE
Figure 6 — Examples of Type E
4.2.5.4 Fixed elastomeric bearing
With restraints the free elastomeric bearing becomes a fixed bearing. The restraints may be arranged
externally or internally of the elastomeric bearing and shall be mechanically fixed to a base plate.
WARNING — The internal restraint subjected to wear, corrosion, ageing and/or fatigue cannot be
inspected in service.
4.2.5.5 Guided elastomeric bearing
With guides the free elastomeric bearing becomes a guided elastomeric bearing. The guides may be
arranged externally or internally of the elastomeric bearing and shall be mechanically fixed to a base
plate.
4.3 Plain pads or strip bearings
Plain pads or strip bearings consist of a solid element of elastomer without reinforcing plates (see
Figure 7). These bearings are only suitable for low pressure and p
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.