SleepySteve

Thanks for the replies guys, the wall is purely for show, to divide their patio and lawn area. No difference in ground levels, so no ground being retained by the "wall" ha. They had said they may replace with a brick wall one day, I'm just replacing what's already there for new to make it presentable (existing sleeper wall is very old and falling apart). Will be interesting to see how the old sleepers were fixed to the ground, if at all! As there are no posts either

Hi there, was looking for a second opinion on a small sleeper wall I'll be building a client some time soon. Customer would like a small sleeper wall built with 200x100 sleepers laid flat, 4 high, so 400mm total. I would usually secure using posts on one side but they don't want to see posts. The only way I can think of is laying the 1st 3 sleepers, drilling a series of 50mm holes all the way through, then driving scaffold tubes through this hole and into the ground (they have diameter of 48.3mm) Maybe 600mm in the ground, so 900mm total length. Then finally fix the 4th sleeper on top to hide the scaffold tube. Any other ideas?