Hanging a gate so it never sags
Most people blame the hinges when a gate sags, swap them for bigger ones, and watch the corner drop anyway. The breakdown sitting on gate installation austin three word wednesday traces it back to the frame and the brace, and for gate installation in Austin, TX that is where the work should start. A gate sags because the frame racks into a parallelogram, and hinges only carry the weight, they do not stop the shape from changing.
The diagonal brace and its direction
A diagonal brace stiffens the frame, but only if it runs the right way. On a hinged gate the brace should rise from the bottom corner on the latch side up to the top corner on the hinge side, so it carries load in compression and holds the latch end up. Run the other way, it hangs in tension instead, and a wide steel frame can still droop. Wooden gates in older Hyde Park and Travis Heights yards often show a brace running backward, and they are the ones that drag first.
Hinge placement
The top hinge carries a pulling load and the bottom one carries pushing weight, so both sit close to the ends of the frame with a wide gap between them. Squeezing the hinges toward the middle makes the gate lever against them. Weld on hinges with a steel pin and a greaseable bushing suit heavy iron, and a strap hinge on a post plate suits a lighter aluminum leaf. The pins are lined up with a string so both hinges share one vertical axis, or the gate binds.
Adjusting and self-closing hinges
A self-closing hinge has a spring in the barrel and a tension screw that sets how hard it pulls the leaf shut. Too little tension and the latch never catches. Too much and the gate slams. The tension is turned a quarter turn at a time and tested with a full swing. A hinge with an adjustable pin lets the crew lift or drop one corner without moving the post, which is how a gate is trued up after the footing settles.
Ground clearance and shims
The gate is lifted on blocks and held at the planned ground clearance while the hinges are set, enough to clear a rise in the drive and any gravel. Washers or thin shims go between the hinge and the post to raise or lower the leaf by small amounts. In Austin, where the clay moves a little every season, the clearance is set with a margin so the corner does not scrape in a dry summer or after a wet spring.
First signs of sag
A scuff mark in the ground arc, a latch that has to be lifted, or a gap at the top of the leaf that is wider than the gap at the bottom all signal that the frame has begun to rack. Caught early, a brace or a hinge shim fixes it in an hour.