EN 1337-6:2004

Structural bearings - Part 6: Rocker bearings

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.

Lager im Bauwesen - Teil 6: Kipplager

Dieser Teil von EN 1337 legt die Anforderungen an die Bemessung und die Herstellung von Kipplagern fest. Zur Aufnahme von Verschiebungen können Kipplager mit einem Gleitteil nach EN 1337-2 kombiniert werden. Lager, die unter den Einwirkungen der charakteristischen Kombinationen einer Verdrehung ausgesetzt sind, die größer ist als 0,05 Radian (rad), liegen außerhalb des Anwendungsbereichs dieses Teils von EN 1337. Dieser Teil von EN 1337 gilt nicht für Kipplager, die aus anderen Materialien als denjenigen nach Abschnitt 5 hergestellt sind.

Appareils d'appui structuraux - Partie 6: Appareils d'appui à balanciers

La présente partie de cette norme européenne traite des prescriptions relatives à la conception et à la fabrication des appareils d'appuis à balanciers.

Konstrukcijska ležišča – 6. del: Linijska in točkovna zasučna ležišča

General Information

• Status: Published
• Publication Date: 06-Apr-2004
• ICS: 91.010.30 - Technical aspects
• Technical Committee: CEN/TC 167 - Structural bearings
• Drafting Committee: CEN/TC 167/WG 4 - Roller, rocker and pot bearings
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 14-Mar-2008
• Completion Date: 14-Mar-2008
• 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
• Directive: 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: SIST EN 1337-6:2004 - Structural bearings - Part 6: Rocker bearings

Relations

• Revised: prEN 1337-6 - Structural bearings - Part 6: Rocker bearings
• Effective Date: 22-Dec-2008

Overview

EN 1337-6:2004 is the CEN (European) standard that specifies requirements for the design and manufacture of rocker bearings used in structural applications. Rocker bearings transfer vertical and horizontal loads between superstructure and substructure and permit controlled rotation. This part of EN 1337 covers both line rockers (partial cylindrical surface rolling on a flat plate) and point rockers (convex spherical surface on flat or concave spherical seating). Rocker bearings that experience rotation greater than 0.05 rad under the characteristic combination of actions are outside the scope. Only the ferrous materials listed in clause 5 are permitted.

Key Topics and Technical Requirements

• Functional requirements
  • Transfer of vertical and horizontal forces; line rockers allow rotation about an axis parallel to the curved surface; point rockers allow rotation about any axis.
  • Horizontal resistance must be by positive mechanical restraint (e.g., shear dowels).
• Rotation capability
  • Manufacturers must declare intrinsic rotation capacity; maximum permitted rotation for covered bearings is 0.05 rad.
• Load-bearing capacity
  • Design verifications based on geometry and steel properties determine bearing capacity.
• Materials
  • Only specified ferrous materials (carbon steel, stainless steel, cast steel, cast iron as per clause 5 and Annex A) are permitted.
• Design and detailing
  • Rules for curved contact surfaces, contact surface interactions, prevention of unintended sliding, eccentricity due to rotation/translation, and dimensioning of line and point rockers.
• Tolerances and surface quality
  • Requirements on flatness, surface profile, roughness and parallelism of contact surfaces to ensure correct load transfer and movement.
• Conformity & quality control
  • Factory Production Control (FPC), initial type testing, routine testing, traceability and CE marking obligations are addressed (Annex B and ZA).
• Installation & in-service inspection
  • Guidance on correct installation, storage and periodic inspection as part of lifecycle management.

Applications and Who Uses This Standard

• Primary users:
  • Bridge engineers and structural designers specifying bearing types and capacities.
  • Bearing manufacturers designing and certifying rocker bearings to European requirements.
  • Contractors and installers responsible for correct placement, alignment and commissioning.
  • Inspection and maintenance teams performing in-service checks and lifecycle management.
• Typical applications:
  • Bridge supports, viaducts and other civil structures where controlled rotation and load transfer are required and rotation limits fall within the standard’s scope.
  • Situations where rocker bearings are combined with sliding elements (per EN 1337-2) to accommodate displacements.

Related Standards

• EN 1337 series (Structural bearings): Part 1 (general rules), Part 2 (sliding elements), Part 7 (spherical/PTFE), Part 9 (protection), Part 10 (inspection), Part 11 (installation/storage).
• Normative references used for materials and testing: EN 1990 (Eurocode basis), EN 10025, EN 10083, EN ISO 4287, EN 10204, ISO standards for cast irons and cast steels.

Keywords: EN 1337-6:2004, structural bearings, rocker bearings, line rocker, point rocker, CEN, design requirements, manufacturing, rotation limit 0.05 rad, bearing materials, factory production control.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Structural bearings - Part 6: Rocker bearingsLãþDAppareils d'appui structuraux - Partie 6: Appareils d'appui a balanciersLager im Bauwesen - Teil 6: Kipplager91.010.30Technical aspectsICS:SIST EN 1337-6:2004enTa slovenski standard je istoveten z:EN 1337-6:200401-junij-2004SIST EN 1337-6:2004SLOVENSKI
STANDARD
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 1337-6April 2004ICS 91.010.30English versionStructural bearings - Part 6: Rocker bearingsAppareils d'appui structuraux - Partie 6: Appareils d'appui àbalanciersLager im Bauwesen - Teil 6: KipplagerThis European Standard was approved by CEN on 2 February 2004.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 Central Secretariat 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 Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, 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© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 1337-6:2004: E

Ferrous materials.17Annex B (informative)
Factory Production Control (FPC).18B.1General.18B.1.1Objectives.18B.1.2Documentation.18B.1.3Operations.18B.2Verifications and tests.19B.2.1General comments.19B.2.2Monitoring of conformity.19B.2.3Tests.19B.2.4Treatment of construction products which do not conform.19B.2.5Recording of verifications and tests (manufacturer’s register).19B.3Traceability.20Annex ZA (informative)
Clauses of this European Standard addressing the provisions of the EUConstruction Products Directive.21ZA.1 Scope and relevant characteristics.21ZA.2Procedure(s) for attestation of conformity of rocker bearings.22ZA.3CE marking and labelling.26Bibliography.28

V = e´(9)6.6.6 Total eccentricityTotal eccentricity ed is:ed = e2,d + e3,d(10)Where no provision is made for prestressing the fixing bolts the total eccentricity in any direction shall not exceed 1/6 ofthe plate dimension in that direction for a rectangular plate or 1/8 the plate diameter if circular, i.e the contact stress atthe extremities shall be greater than zero. At maximum design rotation ad there shall be a minimum clearance of 5 mmbetween opposing components as shown in Figure 5.6.6.7 Limiting rotation conditionThe dimensions of the curved surface shall be such that the contact line or point is at least 25 mm from anydiscontinuity in the curved surface at maximum rotation (see Figures 4 and 5). Rotation about an axis perpendicularto the rocker axis of a line rocker is not permitted.
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