BS 5400-9.1(1983) : 1983

Cooperating organizations
Foreword
1 Scope
2 References
3 Definitions and symbols
    3.1 Definitions
    3.2 Symbols
4 Function of bearings
5 Design considerations
    5.1 General
    5.2 Limit state requirements
          5.2.1 Serviceability limit state
          5.2.2 Ultimate limit state
    5.3 Design life
    5.4 Provision for resetting and replacement
    5.5 Provision for handling
    5.6 Access
    5.7 Durability
    5.8 Movement restraint
    5.9 Uplift
    5.10 Outer bearing plates or spreader plates
    5.11 Use of different types of bearings
    5.12 Positioning of bearings
    5.13 Effects of variations within tolerances
    5.14 Loads and load effects
          5.14.1 General
          5.14.2 Loading resulting from resistance to movement
          5.14.3 Restraints against translation
    5.15 Movements
          5.15.1 General
          5.15.2 Effects on other parts of the structure
          5.15.3 Movement indicators
    5.16 Materials
    5.17 Bearing schedule
6 Particular recommendations for roller and rocker
    bearings
    6.1 General
          6.1.1 Function
          6.1.2 Curved surfaces
          6.1.3 Surfaces in contact
          6.1.4 Length of rollers
          6.1.5 Guidance of rollers
          6.1.6 Prevention of sliding
    6.2 Allowable loads on steel and cast iron roller and
          rocker bearings
          6.2.1 Design limit state
          6.2.2 Cylinder on curved surface
          6.2.3 Cylinder on flat surface
          6.2.4 Sphere in spherical seating
          6.2.5 Sphere on flat surface
    6.3 Flat-sided rollers
    6.4 Non-cylindrical rollers
    6.5 Multiple rollers
7 Particular recommendations for knuckle and leaf
    bearings
    7.1 General
          7.1.1 Function
          7.1.2 Curved surfaces
          7.1.3 Mating surfaces
          7.1.4 Separation of parts
    7.2 Pins
    7.3 Allowable bearing pressures for knuckle and leaf
          bearings
          7.3.1 Design limit state
          7.3.2 Bearing pressures
8 Particular recommendations for plane sliding bearings
    8.1 Function
    8.2 Sliding surfaces
    8.3 Arrangement of sliding surfaces
    8.4 Prevention of rotation
9 Particular recommendations for sliding elements with
    PTFE
    9.1 Surfaces mating with PTFE
    9.2 Location of PTFE
          9.2.1 General
          9.2.2 Confined PTFE
          9.2.3 Bonded PTFE
    9.3 Allowable sliding bearing pressures for pure PTFE
          9.3.1 Design limit state
          9.3.2 Maximum sliding contact pressures
          9.3.3 Contact area
    9.4 Thickness of stainless steel sliding surfaces
    9.5 Fixing of stainless steel sheet
          9.5.1 General
          9.5.2 Attachment by welding
          9.5.3 Attachment by fasteners
10 Particular recommendations for elastomeric bearings
    10.1 General
          10.1.1 Function
          10.1.2 Basis of design
          10.1.3 Design recommendations
          10.1.4 Design limit state
    10.2 Shear strain
    10.3 Shape factor
          10.3.1 General
          10.3.2 Plain pad bearings
          10.3.3 Strip bearings
          10.3.4 Laminated bearings
    10.4 Moduli of elastomer
    10.5 Design pressure on plain pad and strip bearings
    10.6 Maximum design strain in laminated bearings
    10.7 Reinforcing plate thickness
    10.8 Stability
          10.8.1 Plain pad and strip bearings
          10.8.2 Laminated bearings
    10.9 Vertical deflection
          10.9.1 General
          10.9.2 Plainpad bearings
          10.9.3 Strip bearings
          10.9.4 Laminated bearings
    10.10 Rotational limitation
          10.10.1 Plain pad and laminated bearings
          10.10.2 Strip bearings
    10.11 Fixing of bearings
11 Particular recommendations for pot bearings
    11.1 Function
    11.2 Design
    11.3 Rotation
    11.4 Seal
12 Particular recommendations for guides
    12.1 Function
    12.2 Sliding surfaces for guides
          12.2.1 PTFE facing
          12.2.2 Unfaced surfaces
    12.3 Allowable bearing pressures on guides
          12.3.1 PTFE
          12.3.2 Bronze
Appendix A Typical bridge bearing schedule
Publications referred to

Provides recommendations for the design and performance of the most common types of bridge bearings.