Decking Frame Spacing

For timbertech azek decking it s recommended to have a minimum 1 8 to 1 4 side to side gap between deck boards.
Decking frame spacing. Check that your deck frame is structurally sound. Some builders reduce joist spacing to 12 on center to strengthen the deck frame or to increase maximum allowable joist spans. Before you begin make sure you re familiar with the different. Decking is structural in addition to being an aesthetic element.
Typical post size is a pressure treated 4 4. But sometimes they can be a bit unclear when it comes to a crucial component of your deck frame joist spacing. Decking must be able to support 40 lbs live load 15 lbs dead load as it is supported between joists. Most decks use 16 on center spacing for joists.
In this instance the maximum span between deck post centres is 2 07m c16 or 2 24m c24. Joist spacing for composite decking. Most decking is not strong enough to support longer spans than 16. Post spacing should be even.
Timbertech pro and timbertech edge boards must be a minimum of 1 8 to a maximum of 3 16 deck board spacing. The majority of composite deck board brands including trex timbertech and more require deck joists spacing to be at 16 inches o c. The last board won t look good if it s skinny or cut at an angle. Run string lines to ensure all joists are level in plane.
You may be required to install 12 on center joists for diagonal decking. Deck joist spacing blocking guide step 1. Decking manufacturers may recommend anywhere between 12 and 16 inches for commercial decks and 12 to 24 inches for residential decks. Adjust spacing between deck boards measure to the house at both ends and in the center when you get within about 5 ft.
Joist and deck board spacing guidance. Composite decking brands also generally require 12 inches o c joist spacing for 45 degree or angled composite deck board applications. But where the picture frame will be perpendicular to the field boards you ll need to slot the end of the field boards at least every 16 inches to receive the decking clips if you re using hidden fasteners figure 20. Adjust the spacing between deck boards gradually over the next 10 rows of decking until the distance to the house is equal.
Make sure all. Decking subframe design guidance decking beam span guidance. Once you decide the distance measure from the house for the first row of boards. We recommend beams are constructed from two 44 x 145mm q deck deck joists and are placed at maximum centres of 1 8m.
Post spacing is going to depend on your design local building codes the size and length of your beams and the size of your posts. Before installing any decking run string line.