Building a Wood Deck with Pedestal Supported Wood Joists
Using ‘Prime’ pedestals to support wood bearers means that no wood or steel substructures are necessary, other than the bearers to which the deck planks are fixed with nails, screws or clips.
This pedestal system still allows easy access for inspection of membranes and maintenance to any concealed service pipes, ducts or cabling. Air can circulate freely under the deck and water flow easily to surface drains.
The wide diameter pedestal base avoids damage to waterproof membranes and ensures stability of the deck installation.
On sloping substrates, our ‘Prime’ pedestals offer automatic slope compensation up to 5% by means of their self-levelling heads. The heads can be locked in a fixed position if required with an optional head lock component. Wood bearers are laid directly over the pedestal heads and screwed to the upright bracket.
The spacing of the pedestals, both parallel and perpendicular to the bearers, should be confirmed with a structural engineer prior to construction. You should also confirm that the installation complies with all relevant codes and regulations.