The Macalloy Bar - The Foundation Anchor Bolt Solution for on-shore Wind Turbines

The 'Macalloy Bar' was first launched within the construction industry in 1948 as the worlds first post tensioning bar. It was developed initially for use in prestressed and post tensioned concrete construction. The benefits of using the Macalloy bar have been widely recognised across the construction industry and is now used extensively for wind turbine projects. Download our brochures below for more information. Alternatively you can contact us; the details can be found at the bottom of this page.

High Strength Bolt with Excellent Fatigue Properties

The Macalloy bar provides a high strength steel bar with excellent fatigue properties ideally suited to be used as wind turbine anchor bolts in anchor bolt cages in onshore concrete gravity based foundations.

The Macalloy bar provides technical advantages over the standard 8.8 and 10.9 bolts currently used and can provide significant cost savings.







The Macalloy bar has an ultimate failing load of 1035 N/mm2 and a fatigue detail category (kerbgruppe) of 80. The Macalloy bar can be comfortably stressed to 70% (or even up to 80%) of its failing load during installation.

Save money – use less, or smaller diameter, bars and reduce installation and maintenance costs.

Using Macalloy bars as wind turbine foundation anchor bolts with higher strength and fatigue properties allows for smaller diameter and/or less bars to be used in the foundation.















The Macalloy bars have excellent relaxation properties and low lock off losses, helping to reduce installation time and eliminate or reduce the regularity of the need to re-stress bolts after installation.

Corrosion Protection

The Macalloy bar can be supplied with factory applied Denso tape. Denso tape is grease impregnated tape solution that provides guaranteed corrosion protection for well over the usual maximum 30 years design life of an onshore wind turbine. The Denso tape solution provides significant advantages over the traditional duct and heat shrink tubing applications and is a more cost effective solution.



















Macalloy can also supply with duct and grout and provide alternative solutions for corrosion protection of exposed ends.

The Macalloy bar has European CE marking under the ETAG 13 approval and is approved for use in wind turbine foundations by Germanischer Lloyd.

For more details on the bar diameters, failing and proof loads, fatigue performance, Denso corrosion protection and the potential material savings please download the Macalloy foundation anchor solution for wind turbines brochure.



You can email us an enquiry here..



Macalloy at EcoBuild Kuala Lumpur

Macalloy at Ecobuild, Kuala Lumpur

Congratulations to Macalloy Representative, @Sern Liang Lim and his team for exhibiting at Ecobuild SEA for the second year running.  A very productive few days.

Ecobuild SEA, held in conjunction with International Construction Week, is currently the largest construction trade event in Malaysia.


VTB Web 2.png

VTB Arena, Moscow Russia

Work is well under way at the VTB Arena - also known as Dynamo Central Stadium. Macalloy have provided galvanised 520 Grade Tension Rods in M16, M85 and M100. Work is expected to be completed later on this year, ready to host FIFA 2018 World Cup. Macalloy is also supplying Tension Rods to 4 other Russian Stadiums/Arena's - again these venues will be hosting the 2018 World Cup.



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.

Find out more