A sturdy patio table (steel and tile, for example) works well.
Some individuals boil at ground level on the Bayou burner, chill using the IC, and then when the BK has cooled, use a buddy to help lift the kettle onto a folding table so the wort can be drained into a carboy or keg via the BK spigot.
The structure you use must be:
1.) set up on a flat, hard surface,
2.) sturdy--will not roll, skid, slide, or tip over if bumped,
3.) able to support the weight (well in excess of 250 lbs for some systems with 20 gallons of water, 30+ lbs of grains, and SS vessels, etc.),
4.) heat/flame resistant
Ideally, the structure you use should also simplify and economize your brewing process.
Otherwise, what are you using a structure for?
Not all structures can be broken down and easily transported. Keep this in mind if you think you may be moving soon (or often) or like to participate in group brew day sessions. Lifting and carrying more than 50 lbs = misery.