Plywood cases are usually timber battened at the ends with soft wood they have a removable lid which again is usually soft wood timber battened, and the base comes with either a 4 way entry pallet base, or a base with two or three bearers or runners.
The timber wood bearers can have grooves in them so the strapping can be located along the timber wood bearers and won't slip out.
Visit the A1Box-Starpac website for more information on Plywood Cases & Plywood Crates