Tuned Mass Dampers

A&H Custom Machine is a world leader in the fabrication and installation of Tuned Mass Dampers.

rwdi logoWorking with RWDI - world leaders in TMD design and engineering - our reputation for excellence in this area has led us to a variety of notable projects around the world including famous landmarks such as Taipei 101, Spire of Dublin, Las Vegas Control Tower, and the Royal Alexandra Interprovincial Bridge.

Why A&H Custom?

The A&H team has fabricated and installed TMDs worldwide on a variety of projects. We work from designs created by RWDI to achieve a common outcome – a functioning and unique custom damping solution for each project. RWDI works with architects to design TMDs that fit seamlessly into buildings. At A&H we manufacture those designs to detailed specifications. Our installation team, installs the TMDs on building sites and bridges worldwide working alongside project managers, general contractors and bridge contractors.

What is a tuned mass damper (TMD)?

A tuned mass damper (TMD) is a device mounted in large structures, such as tall buildings and long bridges, to reduce the amplitude of vibrations caused by environmental forces or otherwise. Tuned mass dampers are typically constructed of large steel bodies and mounted to move in an opposing direction to the oscillations of the structure.

It is important that the vibrations caused by wind loads on structures such as tall buildings and bridges be damped because it allows them to remain stable. Over the years tuned mass dampers in buildings and bridges have been responsible for keeping structures safe and reducing the amount of damage that harsh weather conditions can wreak on those structures.

Further vibrations can also come from man-made causes – such as cars or trucks passing over a bridge. By reducing the number of vibrations through TMDs, we help to reduce wear and tear on those structures which translates into less frequent, less costly maintenance and repairs.

Our Commitment to Our Customers

At A&H Custom Machine, we have a global customer base. We’ve worked on many contracts for TMDs on massive projects including skyscrapers, airports, and bridges. We are honoured by the trust that our clients put in us. We take our responsibility to preserve the safety and structural integrity of their structural assets very seriously.  

We have been in business since 1986 and have always maintained the highest level of professionalism and expertise.  Furthermore, our shop technicians share over 150 years of experience in a variety of applications including Boring Mill Work, CNC Machining, Electrical Panels and Machine Assembly.

Our expert team has built and installed more tuned mass dampers for buildings than any other firm in the world. We are extremely proud of all the work we have completed to date and look forward to many more exciting projects in the future.

Contact A&H Custom

Seeing is believing. Let Our Work speak for itself.

taipei 101

Taipei 101, Taiwan


432 Park Avenue, NY City

432 Park Avenue, New York City, USA


Royal Alexandra Interprovincial Bridge

The Royal Alexandra Interprovincial Bridge, Canada


  •  Taipei 101 - Taipei, Taiwan
     660 Tonne Tower Tuned Mass Damper
     Two 4.5 Tonne Pinnacle Tuned Mass Dampers
  • 731 Lexington Avenue - New York, USA
     700 Tonne Tuned Mass Damper
  • Trump UN Tower - New York, USA
     600 Tonne Tuned Mass Damper
  • Spire of Dublin - Dublin, Ireland
     1250 kg TMD and 800 kg Tuned Mass Dampers
  • Sultanate of Oman - Muscat International Airport
     40 Tonne Tuned Mass Damper
     30 Tonne Torsional Tuned Mass Damper
  • Wichita Riverfront Pedestrian Bridges - Wichita, Kansas
    2500 kg Tuned Mass Damper
  • New Songdo City - Inchon, Korea
    Eight Tuned Liquid Column Dampers for Four Towers
  • Las Vegas Control Tower - Nevada, USA
    60 Tonne Tuned Mass Damper
  • The Royal Alexandra Interprovincial Bridge - Ottawa, Canada
    Eight 5 Tonne Tuned Mass Dampers
  • 432 Park Avenue - New York, USA
    Two Tower Tuned Mass Dampers, combined weight of 1370 Tonne