Basically, a deck consists of boards laid on top of bearer timbers which, in turn, are carried above the ground by various means. Any board can be used for creating a deck although treated timber would be preferred. Deck boards are typically 19-27mm thick, 75-200mm wide, with a gap of up to 10mm between successive boards. The bearer timbers typically 75/100x50mm or larger, at approximately 450mm centres, although site conditions generally dictate this dimension.  |