Gates near you

Nearly every failed gate fails in one of three places. The hinge post leans, because it carries the whole weight as a lever and was set like an ordinary line post. The frame racks into a parallelogram, because it has no diagonal brace or the brace runs the wrong way. Or the hardware is undersized for the leaf, so the hinges elongate their holes and the gate drops.

So the build order is the opposite of intuition: the hinge post first, deeper and often larger than the line posts and set in a footing sized for the leverage; then a welded or well-joined frame; then the cladding; then hardware chosen for the actual weight; and only then the latch, adjusted last. On a wide opening, two narrower leaves or a drop rod at the center beats one heavy leaf. On a driveway gate, the crew should also confirm which way the ground falls, because a gate that clears in spring can scrape after the driveway settles.

Before any of this, the post holes get the same treatment as the fence: contact 811 a few business days ahead so the utilities mark their buried lines with paint or flags. An automated gate adds a trench for power and for the loop or sensor wiring, which is more digging, on a line that often crosses the driveway. Point out any private lines you know about, because the 811 marks cover utility-owned ones.

A gate across a driveway sits at the boundary between private property and the street, and cities regulate that edge closely. Seattle, for instance, requires a curb cut permit when you make a new driveway in an existing sidewalk curb, and the permit comes from the Seattle Department of Transportation because curbs are on the City right-of-way, with the construction department working alongside SDOT on code compliance. If your gate project involves a new or widened driveway opening, expect that same split between the building department and the transportation or public works department in your own city.

Setback also matters. A gate that opens toward the street needs enough space for a vehicle to pull off the roadway while it opens, and a gate leaf must not swing over a public sidewalk. Both are local requirements, so ask the city what setback and swing they require before the opening is framed. Fence height limits generally apply to the gate as well: Seattle caps fences in its neighborhood residential and multifamily zones at 6 feet with up to 2 feet of architectural features, and 4 feet in a front or street-side setback, which is exactly where a driveway gate lives.

A gate in a pool barrier is the strictest case. CPSC's guidelines say pedestrian access gates should open outward away from the pool and be self-closing with a self-latching device, that gates other than pedestrian access gates should have a self-latching device, and that where the release mechanism is less than 54 inches from the bottom of the gate it should be on the interior side at least 3 inches below the top, with no opening a child could reach through within 18 inches of the release. CPSC calls the weak link in the strongest and highest fence a gate that fails to close and latch completely. State law may set its own figures: California requires the latch release no lower than 60 inches above the ground, while Florida requires the release on the pool side and out of a young child's reach.

In cold states a gate is a seasonal instrument. Water in freezing soil lifts posts, and it never lifts both posts of an opening by the same amount, so the leaf that hung level in October arrives out of square in February. The defence is depth: state codes set a minimum for exactly this reason, and Minnesota's rules require a footing depth due to freezing of five feet in the northern Zone I and three and a half feet in Zone II to the south. Those are Minnesota's figures for the structures that rule covers, and the depth that governs your gate is whatever your local building department specifies, but the principle travels: a hinge post set above local frost depth will move.

Snow and ice add the practical problems. A swing gate needs somewhere for the snow it pushes to go, which is why sliding gates or gates that swing inward over cleared ground are often the better choice on a northern driveway. An automated gate should be commissioned with the obstruction sensitivity set for real conditions rather than a dry summer afternoon, and it needs a manual release you have practiced using before the first power outage in a storm.

In hot and humid regions the seasonal problem is different: timber swells and shrinks with the moisture cycle, so a wood gate can bind for part of the year and rattle for the rest. Building the leaf from a stable material, or hanging it with a little more clearance and an adjustable latch, is easier than planing it twice a year.

Swing gates are simpler, cheaper to install and easier to repair, and they suit a level driveway with room for the arc and space to pull off the road while the gate opens. They are a poor fit where the drive rises toward the street, where the opening is very wide, or where snow piles in the swing path.

Sliding and cantilever gates ignore slope and snow and need no arc, but they need clear space beside the opening for the gate to run into, and a cantilever design needs more of it. They also put more demand on the ground beside the driveway, which has to stay stable.

Automation is a separate decision from the gate type, and it is the one people regret rushing. An operator turns the gate into a powered piece of equipment that needs its own safety devices, a power supply, access for visitors and deliveries, a plan for emergency responders, and a manual release. If the gate is not first built to swing or slide easily by hand, adding a motor only hides the problem until the motor fails.