Tension Structures

Macalloy is a proven market leader in the design, manufacture and supply of threaded bar systems, liaising with world renowned specifiers and contractors for the development of some truly unique and pioneering structures.

With innovation at the heart of our company ethos, Macalloy has been developing new systems and technologies in Tensile Structures since the early 1980’s. Macalloy is a proven market leader in the design, manufacture and supply of threaded bar systems, liaising with world renowned specifiers and contractors for the development of some truly unique and pioneering structures.

Tension Bars

Since the early 1980s, the architectural range of tension bars have grown in popularity providing designers an opportunity to offer contemporary designs and solutions.

Stainless Cables

The cable system utilises the same Macalloy fork end as the accompanying tension structures range of tension bars and compression struts, allowing for combinations of all three systems.

Compression Struts

Macalloy Compression Struts can deal with the demanding work life of compressive structures, applications vary from lightweight canopies to supporting columns and bridges. Macalloy can offer two adjustable solutions complimenting its family of products.

Benefits of Macalloy
Tension Structures.


  • Fatigue resistant rolled thread
  • Available in 460N/mm2, 520N/mm2 and now a 550N/mm2 strength for both carbon and stainless
  • All products compliant with ETA21/0053 and CE compliant
  • Bars and fittings can be supplied primed or painted and/or hot dipped galvanised to BS1461:2009
  • Bespoke fittings can be designed to suit customer applications
  • Technical literature is available with design calculations and loadings to EC3
  • Macalloy engineers are always available to help

In the 1980s Sir Norman Foster was commissioned by the French car company Renault to design a hightech building for their UK operations the brief was to maximise the internal space by hanging the roof using external bracing the building now a grade II listed building went on to win numerous design awards and began a trend in wide span structural design using Macalloy Tension Structure products.

Our Projects

Our supply chain continues to expand via an international network of Macalloy agents and distributors, ensuring continued growth in the global market.