I am planning on building a small wooden sleeper retaining wall in an L shape around my patio. The walls will be 20 inch/50cm high and 11.5ft / 3.6m long with a 4 steps in the middle of one side.
My first question is do i need/should i have deadmen/ tiebacks? i am planning on having a patio above on one side and turf on the other side and dont want the walls moving. I was thinking i would use reinforcement rods anyways.