Table of Contents

History
Design considerations, General, Choice of site, Choice of structure, Economic considerations, Environmental considerations, Electronic considerations, General, Antenna characteristics, Low-frequency antennas, Medium-frequency antenna systemsVHF and UHF antennas, Digital audio broadcasting, Mobile phone antennas, Effect on existing services of subsequent additional antennas
Failures of masts and towers, GeneralIcing failures, Design/detail failures, Maintenance failures, Aircraft damage, Vandal damage, Lessons to be learned
Forms of structure, General, Timber towers, Concrete towers, Lattice steel towers, Lattice guyed masts, Tubular guyed masts, Concrete guyed masts, Other forms of communication structures
Meteorological parameters, GeneralWind, Wind climate, Boundary layer, Serviceability wind speeds, Atmospheric icing, GeneralPhysics and theoretical modelling of ice accretion, Empirical models to estimate ice loads on Structures, Earthquakes, Temperature, Other meteorological aspects
Wind resistance, General, Symmetrical structures without ancillaries, Symmetrical structures with limited ancillaries, General method for structures containing ancillariesLinear ancillaries, Discrete ancillaries, CablesCommunications structures, Measurements on scale model of communications tower, Discrepancy between wind tunnel tests and full-scale measurements, Icing
Response, General, Lattice towers, Guyed masts, General, Frequency domain analysis, Time domain analysis, Simplified methods, Summary
Strength, Introduction, Design against buckling — individual members, General, Influence of local and torsional buckling, Angle leg members, Angle bracing members, Tubular leg members, Tubular bracing members, Solid round members, Secondary members (`redundants’)Bracing types, Compound members, Tension, Connections, General, Flange joints in tubular or solid round leg members, Guy connections
Cables, General, Types of cables, Strength of guy ropes, Rotational characteristics of steel ropes, Modulus of elasticity, Prestretching, Still air tension, Terminations, General, Types of terminations
Aerodynamic stability, General, Vortex shedding, GeneralBackground and critical wind speed, Practical implications, Damping devices, Galloping, General, Critical wind speed, Damping devices
Fatigue, General, Lattice towers, Lattice masts, Guys
Foundations,General,Foundation types,Type I: to resist upliftType II: to resist overturningType III: to resist down thrustType IV: guy anchorages
Codes and standards,History General, Wind loadingIce loading, Strength, Other aspects, Current codes, Communications structures, GeneralComparison of current, Codes
Access and safety, General, IASS Recommendations for safe access
Fabrication and erection, Materials and fabrication, Steel for towers and mast columns, Aluminium, Timber, Plastics, Erection, General, Erection of lattice towers,Constraints, Minimizing maintenance at the design stage, Manuals
Seismic response, General, Seismicity and earthquake-resistance performance levels, Prediction of seismic response of structures, General, Self-supporting lattice towers, Monopoles, Guyed masts, Antennas and ancillary components, Geotechnical considerations
Annex A Codes of Practice and Design Standards, General, Comparisons of National Codes, Scope, Limit states/reliability classes, Wind structure, Wind resistance, Ice loading, Displacements/serviceability, Partial safety factors, Strength, Compressive strength, Tensile strength, Guy assemblies, Prestretching, Terminations, Initial tensions, Erection, Insulators, Access
Annex B IASS Working Group Number 4: Masts and Towers, Brief history, Role in the future, The members of the Group, References, Index