BS 5400-9.2:1983

Foreword
Cooperating organizations
Specification
1. Scope
2. References
3. Materials
3.1 General
3.2 Steel
3.2.1 General
3.2.2 Hardened steel for rollers and rockers
3.3 Cast iron
3.4 Cast aluminium
3.5 Copper alloy castings
3.6 Polytetrafluoroethylene (PTFE)
3.6.1 General
3.6.2 Lubrication cavities
3.6.3 Lubricants
3.6.4 Adhesives
3.7 Elastomer
3.7.1 General
3.7.2 Mechanical properties
3.7.3 Methods of test
3.7.3.1 Hardness
3.7.3.2 Tensile strength and elongation at break
3.7.3.3 Ageing
3.7.3.4 Compression set
3.7.3.5 Low temperature brittleness
3.7.3.6 Low temperature stiffening
3.7.3.7 Low temperature crystallization
3.7.3.8 Ozone resistance
3.7.3.9 Shear modulus
3.7.4 Test pieces
3.7.4.1 General
3.7.4.2 Test samples from surface of bearing
3.7.4.3 Test samples from body of bearing
3.7.5 Frequency of tests
3.8 Fastenings
3.9 Locating keys and keyways
3.10 Other materials
4. Workmanship
4.1 Interchangeability of parts
4.2 Steel parts
4.3 Metal elements
4.3.1 Finished surfaces
4.3.2 Bolts and bolt holes
4.3.3 Welding
4.3.3.1 General
4.3.3.2 Aluminium
4.3.3.3 Stainless steel
4.3.4 Fixing of stainless steel sheet
4.3.4.1 Welding
4.3.4.2 Mechanical fixing with peripheral seal
4.3.4.3 Bonding
4.3.5 Steel reinforcing plates for elastomeric
         bearings
4.4 Bonding of PTFE
4.5 Bonding of elastomer
4.6 Forming of elastomeric bearings
4.6.1 Plain pad bearings and strip bearings
4.6.2 Laminated bearings
4.6.3 Spacers in moulds
4.7 Final assembly and clamping
4.8 Marking
5. Manufacturing tolerances
5.1 General
5.2 Types of tolerance
5.2.1 Standard tolerances
5.2.2 Size
5.2.3 Fit
5.2.4 Surface roughness
5.3 Overall dimensions of assembled bearings
5.3.1 General
5.3.2 Parallelism of outer surfaces
5.4 Dimensions of bearing parts
5.4.1 Roller bearings
5.4.1.1 General
5.4.1.2 Cylindrical rollers
5.4.1.3 Non-cylindrical rollers
5.4.2 Rocker bearings
5.4.2.1 Steels with hardness of 300 HB and over
5.4.2.2 Steels with hardness under 300 HB
5.4.3 Knuckle bearings
5.4.3.1 Pin and leaf knuckle bearings
5.4.3.2 Cylindrical and spherical knuckle bearings
5.4.4 Plane sliding bearings
5.4.4.1 PTFE sheet
5.4.4.2 Mating surfaces
5.4.5 Elastomeric bearings
5.4.5.1 Parallelism
5.4.5.2 Size
5.4.6 Pot bearings
5.4.7 Guides
5.4.8 Fixing holes in bearing plates
6. Protective measures
6.1 Aluminium alloy components
6.2 Ferrous components
6.3 Dissimilar materials
6.4 Damaged areas
7. Inspection and testing
7.1 Materials and workmanship
7.2 Testing of complete bearings
8. Handling, transport, storage and installation
8.1 Care and protection
8.2 Handling devices
8.3 Installation
8.3.1 General
8.3.2 Tolerances
8.3.2.1 General
8.3.2.2 Setting of bearings
8.3.2.3 Concrete surfaces
8.3.3 Threaded fixings
8.3.4 Bedding
Appendix
A. A method for determination of shear stiffness in
     elastomeric bridge bearings
Tabes
1. Steel products
2. Elastomer properties
3. Tolerances on overall size
4. Dimensional tolerances on PTFE sheet
5. Profile tolerances on PTFE projection
Guidance clauses
3. Materials
3.2 Steel
3.3 Cast iron
3.6.3 Lubricants
3.7 Elastomer
3.10 Other materials
4. Workmanship
4.7 Final assembly and clamping
5. Manufacturing tolerances
6. Protective measures
7. Inspection and testing
7.2 Testing of complete bearings
8. Handling, transport, storage and installation
8.3 Installation

Describes materials and workmanship commonly used in the manufacture and installation of bridge bearings. Covers steel, cast iron, lubricants and other materials. Final assembly and clamping, manufacturing tolerances, protective measures, inspection and testing, handling, transport, storage and installation.