BS 6349-6:1989

Foreword
Committees responsible
Code of practice
Section one. General
1.1 Scope
1.2 Definitions
1.3 Symbols
Section two. Environmental loads
2.1 General
2.2 Return period and limiting conditions
2.3 Combined loading
2.4 Wave loading
2.4.1 Wave climate
2.4.2 Description of wave loading
2.4.3 Basic design principles
2.4.4 Simple estimates of forces and motions
2.4.5 Physical models
2.4.6 Computational models
2.5 Wind loading
2.5.1 General
2.5.2 Basic wind speed (3 s gust)
2.5.3 Design wind speeds
2.5.4 Force coefficient
2.5.5 Trim and heel
2.5.6 Simplified method of evaluating wind loading
2.6 Current loading
2.6.1 General
2.6.2 Design speed
2.6.3 Force coefficients
2.6.4 Evaluation of model tests and theoretical
       formulae
2.6.5 Simplifications in design
Section three. Moorings
3.1 General
3.2 Types of moorings
3.2.1 General
3.2.2 Anchor leg moorings
3.2.3 Mooring dolphins and booms
3.3 Selection of mooring system
3.3.1 Operational and environmental considerations
3.3.2 Commonly adopted mooring systems
3.4 Design of anchor leg mooring
3.4.1 Checklist of design activities
3.4.2 Environmental and geotechnical data
3.4.3 Selection of number of mooring legs
3.4.4 Length of mooring line
3.4.5 Selection of mooring components
3.4.6 Capacity of mooring components
3.5 Analysis of moorings
3.5.1 General
3.5.2 Methods of analysis
3.5.3 Mooring line characteristics
3.5.4 Directional effects
3.5.5 Factors of safety
3.6 Design of mooring dolphins and booms
3.6.1 Dolphins
3.6.2 Mooring booms
3.6.3 Fendering and guides
3.7 Anchors
3.7.1 Types
3.7.2 Anchor holding power
3.7.3 Summary of features
3.7.4 Manufacture and certification
3.8 Mooring equipment
3.8.1 Chains
3.8.2 Chain fittings
3.8.3 Wire ropes
3.8.4 Fibre ropes
3.8.5 Winches, windlasses and capstans
3.8.6 Permanent mooring buoys
3.8.6 Miscellaneous fittings
3.9 Maintenance and inspection of moorings
3.9.1 General
3.9.2 Admiralty type and general inshore moorings
3.9.3 Floating docks and pontoons
3.9.4 Light vessel and similar moorings in exposed
       locations
3.9.5 Single point moorings (SPMs)
3.9.6 Inspection of wire rope during service
3.9.7 Inspection of fibre rope during service
3.9.8 Inspection of chain during service
3.9.9 Inspection of connections in service
3.9.10 Inspection of anchors
Section four. Floating structures
4.1 General
4.2 Loads
4.2.1 Types
4.2.2 Load conditions
4.2.3 Load factors
4.3 Codes and classification society rules
4.3.1 General
4.3.2 Steel structures
4.3.3 Concrete structures
4.4 Stability
4.4.1 General
4.4.2 Stability calculations
4.4.3 Intact stability
4.4.4 Damage stability
4.5 Motion response
4.5.1 General
4.5.2 Basic design considerations
4.5.3 Formulae for natural frequency
4.5.4 Equations for natural frequency angular
       displacement
4.6 Longitudinal strength
4.6.1 General
4.6.2 Static analysis
Section five. Pontoons, floating docks and floating
breakwaters
5.1 General
5.2 Pontoons
5.2.1 General
5.2.2 Siting
5.2.3 Loads
5.2.4 Design considerations
5.2.5 Mooring of pontoons
5.2.6 Accessways
5.3 Floating docks
5.3.1 General
5.3.2 Siting
5.3.3 Loads
5.3.4 Design considerations
5.3.5 Floating dock moorings
5.3.6 Construction and trials
5.4 Floating breakwaters
5.4.1 Suitability and limitations
5.4.2 Layout
5.4.3 Types
5.4.4 Design
5.4.5 Mooring design
5.4.6 Installation
5.4.7 Long-term performance
Appendices
A. Bibliography
B. Wind speed map
C. Typical drag embedment anchors
Tables
1. Wind speed factors for use over the open sea
2. Wind force coefficient Cf for rectangular bodies
3. Typical current drag coefficients for wall-sided
     boxes
4. Suggested criteria for selecting the capacity of
     mooring components
5. Chain catenary: geometry and tension applicable at
     all water depths
6. Approximate anchor efficiency
7. Typical inspection schedules
8. Partial load factor gamma fL for floating structures
9. Typical values of metacentric height and range of
     stability
10. Derivation of trochoidal profile
Figures
1. Wave particle amplitude of motion versus water
     depth
2. Longitudinal drag coefficient for rectangular
     pontoon in deep water
3. Transverse drag coefficient for rectangular pontoon
     in deep water
4. Longitudinal drag coefficient at various water
     depths for rectangular pontoon with current head on
5. Transverse drag coefficient at various water depths
     for rectangular pontoon with current beam on
6. Admiralty type mooring buoy
7. Single anchor leg mooring
8. Catenary anchor leg mooring or single point mooring
     (SPM) for tankers
9. Various arrangements of spread buoy moorings
10. Dolphins used to restrain a landing stage
11. Mooring boom
12. Fluke to shank angle
13. Comparison of chain strengths
14. Chain fittings
15. Metacare M, centre of gravity G and centre of
     buoyancy B
16. Righting lever (GZ)
17. Areas for moment versus heel angle
18. Trochoidal profile
19. Typical curves for longitudinal strength
20. Typical use of pontoons
21. Typical section through floating dock
22. Stability of floating dock
23. Mooring arrangements for a floating dock
24. Maximum 3 s gust speed in metres per second at 10 m
     above the sea surface with an average recurrence
     period of 50 yeras
25. Typical drag embedment anchors

Includes information on wave, wind and current loads.