Gates are the hardest-working part of any fence. They swing hundreds of times a year, carry their own weight on two hinge points, and endure constant lateral stress that no other section of fence experiences. When a fence fails prematurely, the gate is almost always the first thing to go.
The AFA's Fence Installation School covers gate installation across all four fence disciplines — ornamental, chain link, wood, and vinyl — because each material has specific hardware and structural requirements.
Gate Posts: The Foundation of Every Gate
Gate posts carry more load than any other post in the fence line. They support the weight of the gate panel, absorb the shock of opening and closing, and resist the lateral force of wind on the gate.
Gate post sizing (minimum recommendations):
| Fence Type | Line Post Size | Gate Post Size (minimum) |
|---|---|---|
| Wood (6 ft) | 4×4 | 6×6 or steel 2⅜" |
| Vinyl (6 ft) | 4×4 or 5×5 | 5×5 with aluminum stiffener |
| Chain link | 1⅝" or 2" | 2⅜" or 2⅞" |
| Ornamental aluminum | 2×2 | 2×2 or 2½×2½ (per manufacturer) |
| Double drive gate (any) | — | Minimum 4" steel or 6×6 wood |
Gate post footings: The AFA recommends deeper and wider concrete footings for gate posts than for line posts. For a standard 6-foot wood fence, line posts need 30–36-inch depth; gate posts should go 36–42 inches with a wider diameter hole (14–16 inches vs. 10–12 inches). See our post depth guide and concrete footings guide for specifications.
Swing Gates (Most Common)
Swing gates are the standard for residential walk-through and single-vehicle openings up to about 12 feet wide.
Single Swing Gate
Width: 3–5 feet for walk-through, 10–12 feet for vehicle
Hardware: Two or three strap hinges, self-closing spring hinge (required for pool gates), thumb latch or lever latch
Installation steps:
- Set gate posts plumb in concrete with proper spacing — allow ½" to ¾" clearance on each side of the gate panel
- Wait 48–72 hours for concrete to cure (per AFA standards)
- Mount hinges to the gate post first, then hang the gate panel
- Check swing clearance — the gate must clear ground, driveway slope, and any obstructions
- Install latch hardware on the opposite post
- Verify the gate swings freely and latches positively
Swing direction: Gates should open inward (toward the property) in most residential applications. Pool gates must open outward (away from the pool) per building codes. See our pool fence requirements guide for specifics.
Double Swing Gate (Double Drive)
Width: 10–16 feet for vehicle access
Hardware: Heavy-duty hinges, drop rod for the stationary leaf, center latch or cane bolt, wheel or roller for large/heavy gates
Double drive gates are essentially two single gates that meet in the middle. The key hardware piece is the drop rod — a vertical rod on one gate leaf that locks into a ground sleeve, creating a fixed post that the other leaf latches against.
Critical detail: The ground must be level and firm where the drop rod engages. A concrete pad or embedded sleeve prevents the rod from pushing into soft ground over time. In Fort Worth and other Texas cities with expansive clay soil, ground movement can misalign drop rod sleeves within a few years — a steel-reinforced concrete pad is the solution.
Sliding Gates (Rolling and Cantilever)
Sliding gates are used when swing clearance isn't available — typically for wide commercial openings or driveways on slopes.
Rolling Gates
Roll along a ground track on wheels. Used primarily for chain link commercial gates.
Width: 12–40+ feet
Track: V-groove track set in concrete, must be level and free of debris
Hardware: Bottom rollers, top guide bracket, latch/lock
Per the AFA's chain link discipline, rolling gate track must be set on a concrete foundation and the gate frame must be rigid enough to prevent racking (twisting) during operation.
Cantilever Gates
Slide without a ground track — supported by rollers mounted on the gate post assembly. The gate extends 50% beyond its opening width to counterbalance.
Width: 12–30+ feet
Advantage: No ground track to collect debris, ice, or shift with ground movement
Disadvantage: Requires extra space behind the gate post (1.5× the opening width)
Gate Hardware Deep Dive
Hinges
- Strap hinges: Standard for wood gates. Bolt through the gate post for maximum strength.
- Self-closing hinges: Spring-loaded. Required for pool gates. Available in adjustable tension models.
- Barrel hinges: Standard for ornamental aluminum and steel. Weld-on (steel) or bolt-on (aluminum).
- J-bolt hinges: Used for chain link gates. Hook over the gate post top rail.
Latches
- Thumb latch: Standard residential. Operates from one side.
- Two-sided latch: Accessible from both sides. Required when the gate is the only access point.
- Gravity latch: Self-closing. The arm drops into the strike by gravity.
- Magnetic latch: Strong magnetic pull keeps the gate closed. Low maintenance.
- Keyed lock: For security applications.
Gate Wheels and Supports
For heavy gates (over 50 lbs), a support wheel on the swing end prevents sagging. The wheel rolls on the ground or a concrete pad, taking weight off the hinges. Essential for double drive gates and any wood gate over 5 feet wide.
Material-Specific Gate Notes
Wood gates sag over time because wood is heavy and hinges loosen. Prevention: Use a diagonal brace (a board running from the bottom hinge corner to the top latch corner) and steel anti-sag hardware. Or build a steel frame with wood infill.
Vinyl gates require aluminum stiffeners inside the post and gate frame for hinge and latch attachment points. Per the AFA's vinyl discipline, post stiffeners serve as an alternative to concrete and rebar for mounting gate hardware.
Chain link gates use a welded tubular steel frame with chain link fabric stretched and tied across it. The AFA training covers gate frame construction, hinge placement, and latch hardware specific to chain link.
Ornamental gates are available in swing, rolling, and cantilever configurations. The AFA lists swing, rolling, cantilever, vertical lift, and vertical pivot as ornamental gate types.
Frequently Asked Questions
How wide should a fence gate be?
Walk-through: 36–48 inches minimum. Single vehicle: 10–12 feet. Double vehicle (RV/boat): 14–16 feet. Measure your largest vehicle or equipment that needs to pass through.
Why does my gate sag?
Three common causes: (1) undersized gate posts settling under load, (2) hinge screws pulling out of wood, (3) no diagonal brace on wood gates. Fix by upgrading hinges to bolt-through, adding a diagonal brace, or installing a gate wheel. Our fence installation guide covers post sizing.
Do pool gates need to be self-closing?
Yes — in virtually every U.S. jurisdiction. The gate must close and latch automatically from any open position. Self-closing spring hinges are the standard solution. Full pool fence requirements →
How much does a gate add to fence cost?
Walk gate: $150–$400. Double drive gate: $400–$1,200. Sliding gate (motorized): $1,500–$5,000+. See our cost per foot guide for complete pricing.
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*Gate specifications per American Fence Association Fence Installation School across all four disciplines: ornamental (ASTM F2408), chain link (ASTM F567-07), wood (ASTM F537-01), and vinyl (ASTM F1999).*