I built a 7m x 4m Merbau deck over a concrete slab in my alfresco area. I used H3 treated Pine attached to the concrete slab with L brackets which allowed a gap under them.
The joists were placed every 450mm and bearers 2m apart. It took three full weekends to complete the project.
To create interest and break up the long expanse of decking, I placed a perpendicular board to the others every few meters. Not only is this pleasing to the eye, but it conveniently allowed me to work with shorter lengths of decking.
To finish the deck, and for some added ambience during evening alfresco dining, I installed up-lighting surrounding its perimeter.
How to build a low-level deck
A low-level deck can pose a range of potential design and installation problems, with particular challenges around ventilation, drainage, termites and rotting. But it doesn't have to be a difficult project once you take the time to understand the basics of how they are put together.