What is the best way to join green oak planks?

The best way to join green oak planks is through the use of mechanical fasteners like screws or bolts, as they provide strong connections while allowing for movement due to moisture content changes. Additionally, using wood glue designed for exterior use can enhance the bond, especially if the edges are prepared properly by planing or jointing them for a tight fit. It's also important to account for the wood's natural expansion and contraction, so incorporating methods like pocket holes or dowel joints with some flexibility is advisable. Always ensure that the planks are acclimated to their environment to minimize stress on the joints.