DuoSpan 99 Joist Aluminium

What are the dimensions of the DuoSpan 99 Joist?

A DuoSpan 99 joist is made from hardwearing aluminium, this joist measures 51mm x 68mm x 3600mm. Small but mighty, they play an integral role in constructing your decking or cladding subframe. They're also extremely light, making them easy to handle, attach and store.

What's the difference between DuoSpan 51 and DuoSpan 99?

Although each constructs a comprehensive subframe decking system, the two differing numbers refer to the best locations each frame will perform and the relevant weights they can hold. DuoSpan 99 is suitable for use over soft substrates, where the Plas-Pro can be driven into the ground or concreted over. DuoSpan 51 is better suited for roof terraces and ground-level terraces. To understand which DuoSpan option is suitable for your exterior structure, please speak to the team.

Are the DuoSpan 99 Joists easy to install?

A Duospan 99 joist is easy to install. Following your DuoSpan subframe installation guidelines, you will know precisely where your aluminium joists must be fixed. They all come with pre-drilled holes for an easy slot-and-screw assembly.

What is DuoSpan?

DuoSpan is an aluminium joist system designed to provide a solid and long-lasting foundation for your decking or cladding. Its components make up the innovative and durable framework for your Millboard product. This makes installing decking or cladding an easy solution, with the flexibility to work around different shapes, sizes, heights, and challenges.

Can I use any fittings with the DuoSpan joists?

The DuoSpan range of fixtures has been purposely designed to work in conjunction with the rest of the DuoSpan range and Plas-Pro subframes from Millboard. This means the DuoSpan screws will perfectly fit the pre-drilled holes to provide a secure and easy installation.