Timber Decking is for outdoor purpose. The ideas to having a deck,it is actually like a path or walkways at your garden instead stepping on the wet grass or soil.
Outdoor furniture can be made of decking style, Fencing, Chairs,Table, Hut, Gazebo,even on walls or on your gate.
The type of wood suitable for decking is Chenggal, Resak , Balau, Merbau.
With a proper coating can last you a lot of years.