Do you want to build a raised decking area that is structurally solid, robust, and strong? Ensure that your decking area has the proper foundation with Composite Structural Joists, which are designed to function on both grass and concrete. The joists are long-lasting, strong, and sturdy. Charcoal Composite Structural Joists are composed entirely of recycled materials and are only available in Charcoal. It is advised that one joist be installed for every square metre of decking and every 400mm of the deck for proper installation.