• Consultancy, design and engineering services in ropes, textiles and marine systems

    • Optimoor is a unique, easy-to-use vessel mooring analysis program

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    •  World leading authority in the design of synthetic Riser Protection Net Systems

    • Moorings for Marine Renewables

      concepts, design, fabrication and installation

  • Tension Technology International (TTI) is an independent consulting group specialising in flexible tension member systems.

    TTI is an independent research, design and development company.  Established in 1986, It has consultants based in the UK, Holland, USA and China. TTI's services include design, engineering and testing of fibres, wire and fibre ropes, chain, cables, umbilicals, fabrics, mooring systems, riser protection nets and subsea tethers.

    TTI developed the Optimoor computer model for calculating response of offshore and pierside vessels, mooring line forces and fibre ropes which now has over 200 users worldwide. Fibre Rope Modeller was also developed by TTI and calculates load/extension, torque/twist, breaking load and fatigue of fibre ropes. TTI has designed several offshore synthetic rope systems for 30-year design lives, of which the oldest has seen in excess of 15 successful years’ maintenance-free service.

    TTI has brought its extensive fibre rope and mooring design expertise to the benefit of the marine renewables industry including leading a number of industry JIP's in the evolving floating offshore wind and hydrokinetic (tidal, river and wave power) technologies.  Services offered typically cover the range from conceptual design through to detailed engineering of the mooring system and its components.

    From its inception, TTI has been involved in near-industry research, including JIPs and single client studies. One of their recent research projects, funded by the Carbon Trust and partners, measured fibre rope axial stiffness and fatigue properties to provide state-of-art property data enabling the correct specification of materials and thus facilitate modelling mooring loads with confidence. TTI has considerable fibre testing experience and has conducted over 200 breaking strength, cyclic load and abrasion tests on many different rope structures and fibre types under that program.

    Each of our principals has at least 20 years experience in his field and is an internationally recognized expert. TTI has developed a dedicated facility for the testing of fibre, wire and chain tension systems. Our services include fundamental R&D, and forensic examination of failures. We also offer consultancy in technical textile structures, particularly flexible containers. TTI Testing will always offer innovative proposals on any aspect of materials testing and will design and build new equipment when required.

    • Optimoor Mooring Analysis Software view
    • Riser Protection Nets (RPN) Technical Expertise view
    • TTI Marine Renewables Ltd Marine Renewable Mooring Services view
    • Expert Witness Marine Accident Investigation view
    • Fibre Rope Modeller Rope Design Software view
    • Joint Industry Projects (JIP) Research and Development (R&D) view
  • Services

    Consulting services for Rope Textiles and Marine Systems

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  • Tools & Guides

    Online Tools and Guides for rope selection and design

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  • Software

    Rope Design or Mooring Service

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  • Paper & Technical Notes

    Consulting services for Rope Textiles and Marine Systems

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  • Latest News
    TTI personnel honoured at Houston’s Offshore Energy Centres ‘Hall of Fame’

    TTI personnel honoured at Houston’s Offshore Energy Centres ‘Hall of Fame’

    TTI’s Stephen Banfield, John Flory, Mike Parsey and the late John Hearle were amongst other industry experts and companies honoured in September at a presentation awards evening hosted by Houston’s Offshore Energy Centre in recognition of their work in pioneering the use of polyester ropes in Deepwater Mooring Systems. TTI personnel honoured at Houston’s Offshore Energy Centres ‘Hall of Fame’ for Polyester Deepwater Mooring Systems 2016 Pioneering Technologies Dr...Read More...
    TTI supports specialst rope seminar in Kristiansand, Norway

    TTI supports specialst rope seminar in Kristiansand, Norway

    ‘Like being at a Jimi Hendrix concert’ TTI's Nick O'Hear and Steve Banfield joined steel wire specialist Roland Verreet and a specialist audience at a three-day seminar held in Kristiansand, Norway during September.   The 50 seminar attendees included larger groups from MacGregor and National Oilwell Varco, in addition to representatives from MHWirth, Cameron, DNV GL, Siem Offshore and Red Rock – and also employees at Rolls Royce, Maersk and ...Read More...
    TTI presents at OCEANS's 16 MTS IEEE Conference in Monterey, California

    TTI presents at OCEANS's 16 MTS IEEE Conference in Monterey, California

    TTI presented a paper on "Mooring Systems for Marine Energy Converters" at the OCEANS 16 Conference in Monterey, California, on September 22. John Flory, President of Tension Technology International LLC, presented the results of TTI's research to develop an '"All Synthetic Mooring System" as reported previously in our news. The paper explains the design of a mooring system which can survive large waves in shallow water and address the challenges...Read More...
    MRCF and MESAT Projects in Moorings for Marine Renewables

    MRCF and MESAT Projects in Moorings for Marine Renewables

    MRCF (Marine Renewables Commercialisation Fund) TTI and TTI Testing have recently completed a major, 2 years, £1.3m​ UK and Scottish ​Government funded Carbon Trust grant conducting research into synthetic mooring and anchoring technology for wave, tidal and floating wind. A specially designed nylon rope mooring line has been tested for 2 years and 20 million cycles in tension-tension fatigue and gave 108% residual strength.  This research demonstrates that nylon ropes can now...Read More...
    Optimoor Seminar - November 16-17

    Optimoor Seminar - November 16-17

    OPTIMOOR Seminar 2016 TTI is pleased to announce that this years open Optimoor seminar will be held in Hong Kong on the 16 and 17 November at the Crowne Plaza Hong Kong Kowloon East Hotel. Topics to be covered include; Ship-to-Ship Batch Analysis Dynamic Analysis Passing Ship Analysis Wind and Current Coefficients Effects of Waves and Swell Mooring Line/Tails – Materials & Lengths Fenders and Fender Characteristics Wind, Current and Wave Direction Sweeps/Roses L...Read More...