Millboard DuoSpan Joist 99 x 68 x 3600mm

This component delivers exceptional subframe strength by combining durable aluminium with recycled plastic. Specifically engineered for use with DuoSpan 99 mm aluminium joists, it enables top-down fixing of decking boards and offers wide spans. It's a structurally compliant, easy-to-install solution for both Millboard and other high-performance decking systems.