Macalloy formally McCalls Special Products has come along way since 1921 when the company was first founded by three men, T H McCall, E L Raworth and C W Hamilton. McCalls in the early years supplied the rapidly expanding reinforced concrete trade with steel rods and bars.

In the decades that followed, McCalls developed services in cutting bars to length, bending, straightening and designing reinforced bar products for concrete structures.

In the post war era of the 1940’s McCall’s invested considerably in the development of plant and building facilities, which as a result developed the first post tensioning system in 1948. The Macalloy system was an instant success when it was launched, and became a by-word for post tensioning in the construction industry.

In 1962 the company became a totally-owned subsidiary of the United Steel companies was nationalized and became part of the British Steel Corporation and McCalls became part of Reinforcement Steel Services.

In the 1980`s, Sir Norman Foster designed the Renault distribution centre in Swindon, England using Macalloy’s Tension Structure system. The building went on to win numerous international awards and this unique application began a trend in wide span structural design. Leading to new systems and technology that were to change traditional principles forever.

In 1983 the company become part of allied steel and wire plc, then a further two changes of ownership took place in the 90's. But the final change of ownership was in August 2003 when the directors of the business carried out a successful management buy out with the support of UK enterprise.

As the company continues to grow year upon year, November 2006 saw the company relocate to the new HQ prestigious office and factory complex at Dinnington, Sheffield. The purpose built factory has enabled the company to carry on supplying products into the tension structures, façade engineering, ground engineering and post-tensioning/concrete engineering projects worldwide. Also enabling Macalloy to enter new markets throughout the world.

Proud of its history and contribution to the construction industry worldwide, in November 2007 Macalloy celebrated 60 years of providing its post tensioning system into the civil engineering system. Traditional ethos of consistently serving various markets with experience, innovation and quality, has strengthened the company’s reputation as the leading threaded bar manufacturer in the world. Macalloy continues to be presented with new and exciting opportunities, expanding its portfolio of projects, and has always gained much respect from architects, engineers and contractors, this continues to be the case today.

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Mordovia Stadium Saransk

Macalloy in Russia

Macalloy is proud to have been involved in 4 of the stadiums due to host FIFA Worldcup games in Russia. Pictured is Mordovia Arena in Saransk. Macalloy has provided galvanised M48 tension bars, turnbuckles and connection discs to help support the roof. The first match their will be held on 16th June.



Arc by Crown, Sydney, Australia

Arc by Crown, Sydney, Australia

Arc by Crown, are luxury apartments in Sydney, Australia, designed by globally renowned architect Koichi Takada. Residents will enjoy panoramic views from the two glass steel towers that soar high into the Sydney skyline. Over 300 Macalloy Stainless 520 M42 Tendons have been used to help support the roof.



Macalloy Site Services .JPG

Site Services

Macalloy can provide support for installation and stressing of all our products. Site services support includes equipment hire, training of site personnel to install and tension bars and on site installation.

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