Why Use Our Timber Decking Joists?
Starting your base correctly is essential when it comes to building a decking project from the ground up, with our FSC® Certified timber joists able to do the job perfectly. Used in conjunction with our timber posts, you will be able to create a sturdy base and supporting frame using timber decking joists.
Joist specifications
Length: 4.2m and 4.8m
Width: 150mm
Depth: 47mm
Weight (4.2m): 14.94kg approx.
Weight (4.8m): 17.07kg approx.
Our timber decking joists are high-pressure green treated with Tanalith ‘E’ preservative and are graded C24 for strength, meaning efficient structural performance. Produced from responsibly sourced wood, our timber joists are long-lasting and able to withstand the elements all year round.
We recommend using our timber joists on a solid concrete decking block to ensure they are as steady as possible. Consult our installation guides for further help and best practice techniques. We have trims and fixings available also to assist you with easy installation.
Timber is often classed into numbers. C24 timber and C16 timber are both varieties of softwood lumber. The C numbers represent how fast the wood was removed from a developing Softwood tree.
Timber (C16) extracted from a tree which has developed at an accelerated pace, compared to standard trees. Thanks to this process of forced growth opposed to the gradually grown timber. Having the timber grown at an increased rate with more knots throughout can result in a lighter, therefore weaker wood.
The C24 graded timbre is a more durable timber, taken from a tree which has been allowed to grow at a naturally slower pace. Generally, C16 timber is considered 50% weaker than C24 timber.
Looking for an alternative timber joist?
See our C24 sawn green treated timber decking joist 47mm x 100mm
Looking for a timber decking board?
See our 4.8m timber decking board
Or browse our timber decking department for decking boards and more…
