The most important thing about jump construction is that it follow the "specs" and is safe for the dog. It should look like an upside down "T" with a ramp on one side. In Mondio Pallisade, the dog jumps/climbs over the flat "face" and down the back "ramp". More metal used will increase stability, but will also be much heavier to move. Re-inforcement, steps, hooks, shelves can be added under ramp.

Here are some pics of pallisade's I have seen -

Above, "L" angles bound together with "L" angle

"L" angle bound with flat peice weld joining

side vertical made from molded "channel"
base and ramp support made from square tubing