• 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
    • Technical Inspection Services Independent Inspection, Project Management, Expediting and Testing Services 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
    Mike Parsey - TTI Founder

    Mike Parsey - TTI Founder

    MICHAEL R. PARSEY It with sadness that we announce the loss of Mike Parsey in October.  Mike will be remembered by all in TTI as our founder, business colleague and friend and will be greatly missed.  He taught us so much and was always interested in spending time to help and give advice from his immense knowledge of fibre ropes that he had gleaned over his 40 years of service. He was educated as a Physicist at Leeds University and became a self-educated Plastics Technologist. He sp...Read More...
    TTI Marine Renewables starts 3 year Floating Wind Project

    TTI Marine Renewables starts 3 year Floating Wind Project

    TTI sister company, TTI-Marine Renewables, are pleased to announce the start of a 3 year floating wind turbine project involving Toda Corporation (Japan), Kyushu University (Japan) and Bridon-Bekaert (Scotland) and TTI-Marine Renewables (Scotland) funded by Scottish Development International in collaboration with the Nippon Foundation. The project will involve the development of a taut synthetic mooring system for 2MW and 10MW floating wind turbines to be located off the coast of Goto Island, Ja...Read More...
    Optimoor Seminar 2019 - 21st to 22nd October 2019

    Optimoor Seminar 2019 - 21st to 22nd October 2019

    TTI is pleased to announce that this year’s seminar will take place from the 21st to 22nd October, at the JW Marriott Houston Downtown, Houston, Texas, USA. New and Upcoming Features to be covered include: Scripting Automated OCIMF Reporting Dynamic Batch Analysis Enhanced Dynamic Passing Ship Analysis Network Licence Mooring Lines / Rope Stiffness OCIMF MEG4 Discussion Upcoming Developments Including 3D Graphics Other topics to be cov...Read More...
    TTI wins ~£400k Contract from WES for development of Netbuoy 2 Project

    TTI wins ~£400k Contract from WES for development of Netbuoy 2 Project

    Supported by; Tension Technology International (TTI) are delighted to have been awarded close to £400k contract from Wave Energy Scotland (WES) as one of three projects in its recently announced £1.4M Structural Materials and Manufacturing Processes Stage 2 Projects.  TTI’s Netbuoy 2 project will focus on two key areas of development.  Impermeable coated fabrics to provide compliant buoyancy modules and fibre rope ‘load nets’ to encapsulate the modules...Read More...
    TTI and Partners Win Prestigious Rushlight Award!

    TTI and Partners Win Prestigious Rushlight Award!

    TTI and collaboration partners Nylacast, Brunel University and EMEC (European Marine Energy Centre) were delighted to receive the 'Rushlight Responsible Product or Service Award', at this years awards evening held in late January. The award was given in recognition of the work carried out on new connectors which have been designed under the STORM (Specialised Thimbles for Offshore Renewable Marine Energy) project which is funded by Innovate_UK. The project focus...Read More...