A sliding gate moves sideways across the opening. It needs runout space along the fence, usually 1.0 to 1.2 times the opening width, but it asks for no clearance out in front. Two builds dominate. Tracked sliders run on a ground rail with bottom rollers. Cantilever sliders carry their own weight on top rollers fixed to a counterweight section, leaving the driveway clear of any track.
Residential driveway openings in Australia are usually 3500 to 6000 mm. Commercial industrial openings can run to 12,000 mm and beyond. Cantilever gates win on driveways that must stay clear: low-clearance vehicles, drainage runs, leaf debris that would jam a ground track. The trade-off is roughly 30% extra steel for the counterweight section.
CAD60 supports both styles. The engine recomputes overhang, counterweight length, and rail position from the opening width you enter.