Cantelever could be a few things I'd think; I'm guessing and inverted T. Like this- ⊥ but two uprights or a wide single board as an upright. The end result would be an H on it's side when things are extended... and a thin crate structure when closed. (A bit of storage? A shelf or two would be possible between the uprights.)
The extensions could also fold to thirds of the short length for storage. Clasping open/closed by numerous hardware's; hook & loop to box latches.
The added leg weight down low adds to a lower center of gravity.
As a table topper, if you build it right you could opt for the folding crate frame as well; for a "storage rack" to hold the leaves off the floor for ping pong night..... Like on like a TV tray rack, or glass truck rack.
Building longer than the table along the seam would allow C clamp use on the halves if they aren't hinged (You'll want to use location pins of some type, dowels, inserts, ) etc.
