/diy/ - Do It Yourself

>>2696597
Ask a local precast mob,
The team here from Wagner's is standing in front of a piece for the bogo road train station. These were cast on their side with the holes in the middle made with a box with retractable struts in the middle (a guy would have to climb in to retract the struts after knocking out extra pieces of moulding) and flip up walls on the outside. The base of the mould was a concrete slab. You should be able to use a tube in the middle flip up walls for the outside and walls held up by each other with struts for the notches. You also may want some beams to run across the top of you mould to hold it open to the right dimensions as well
Tldr ask a local precast mob.