As a complete novice, I have been reading about outside engineering projects such as decking and patios.
All the information I read tells me that to lay structural joists as a subframe / sleeper joists, the joist should be positioned with the thin side down, the wider side running perpendicular to the ground.
From my understanding, this makes for a stronger frame which can take more weight. My question is does it have to be this way? For example, if the goal was to create a lower deck, is it structurally sound for the joists to be laid "wide side" down?