A cantilever gate hangs from two wheel carriages mounted on posts beside the driveway. The panel extends past the post line as a tail section, typically 50 to 60 percent of the clear opening width, that counterbalances the gate in suspension. Guide rollers at the top and a bottom end cup keep the panel aligned without touching the ground at any point in its travel.
Sizing the system correctly requires four measurements: clear opening width, available tail section space behind the post, gate panel weight, and post spacing. Foothills driveways are often gravel-surfaced and subject to seasonal frost heave, which shifts a ground track out of alignment. A cantilever layout is unaffected by surface movement because the carriages are fixed to posts set in concrete footings.
Wildfire season adds another practical reason to avoid a ground track: ash and debris accumulation after a burn can pack a track solid within hours. A trackless cantilever gate slides through that debris without binding. The installer confirms carriage height, end stop placement, and gate weight before selecting the slide operator, so the motor is matched to the actual load.