I feel like if I screw it all together enough and use a brick like pattern that two sleepers on top of each other will be pretty strong.
Have a look at Toolstation item 42827, (2 x 32 x 32 x 300mm galvanised angle), in each internal corner, drill the holes out to 5mm to accept TS 14627, (5.0 x 80mm Torx woodscrew), with 3mm guide holes about 20mm into the sleepers.
@root started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I feel like if I screw it all together enough and use a brick like pattern that two sleepers on top of each other will be pretty strong.