Gate Hinge Types Explained: Rising Hinges, Weld-On, Ball Bearing, and Pool-Compliant Options for Every Gate
A gate that sags, sticks, or swings out of alignment is almost always a hinge problem. Choose the wrong hinge type for the gate weight, material, or application, and you'll be adjusting it every six months. Get it right from the start and the gate just works.
This guide covers every major gate hinge type, when to use each, and how to size them correctly for your gate.
Weld-On Hinges
Weld-on hinges are welded directly to the gate frame and post, creating a permanent and extremely rigid connection. They distribute load across the weld area rather than concentrating it at a bolt hole, making them the strongest option for heavy steel gates.
Best for: Heavy steel swing gates (driveway, warehouse, industrial). Any gate over 50kg. Applications where long-term alignment under load is critical.
Note: Once welded, the gate cannot be removed without cutting the hinge off. Ensure alignment is perfect before welding.
Bolt-On / Strap Hinges
Bolt-on strap hinges use a long flat plate (the strap) fixed to the gate face with bolts or lag screws, combined with a post plate or eye bolt fixed to the post. They are easy to install, adjust, and replace. The strap distributes load along the gate face, making them suitable for timber and lighter steel gates.
Best for: Timber gates, light to medium steel gates, garden gates, heritage-style decorative gates. Choose hot-dip galvanised or stainless steel for outdoor use.
Rising Hinges (Lifting Hinges)
A rising hinge has a helix-shaped pivot that causes the gate to lift as it opens and lower as it closes. This is useful for gates that need to clear uneven ground, gravel, or soft surfaces without dragging. The gate returns to a closed position under its own weight as gravity acts on the angled pivot.
Best for: Gates over gravel driveways, sloping thresholds, internal access gates in settings where the gate swings over a surface that changes height. Rising hinges provide passive self-closing action, which is useful but does NOT satisfy AS 1926.1's self-closing gate requirement for pool fences (a compliant gate closer is still required).
See our Rising Hinge Guide for a detailed breakdown of applications and sizing.
Ball Bearing Hinges
Ball bearing hinges incorporate sealed ball bearings in the knuckle joint, reducing friction and wear. They swing more smoothly than plain-bore hinges and require virtually no maintenance over their service life.
Best for: High-frequency access gates (pedestrian gates used many times per day), gates fitted with hydraulic closers (the closer adds torque load, which wears plain-bore hinges faster), and applications where smooth, consistent operation is important.
Pool Gate Hinges: What AS 1926.1 Requires
Pool fence gates must be self-closing and self-latching under AS 1926.1. The hinge alone does not satisfy the self-closing requirement. A separate hydraulic gate closer or a dedicated pool gate hinge system (with integrated closing spring) is needed. Key requirements:
- The gate must swing away from the pool area.
- It must close and latch automatically from any open position, including being held fully open.
- The closing mechanism must function in all weather conditions.
The Polaris 200 Soft Close Hinge System (2205 duplex stainless steel) is one solution that integrates the hinge and closing mechanism, providing a pool-compliant, maintenance-free option in a single product.
Gate Hinge Size Chart: How to Match Hinge to Gate Weight
| Gate Weight | Gate Width | Recommended Hinge Size | Number of Hinges |
|---|---|---|---|
| Up to 20kg | Up to 1.0m | 75-100mm strap or T-hinge | 2 |
| 20kg to 40kg | 1.0m to 1.5m | 100-150mm heavy strap or butt hinge | 2 |
| 40kg to 80kg | 1.5m to 2.0m | 150mm heavy strap or weld-on hinge | 3 |
| 80kg to 150kg | 2.0m to 3.0m | Heavy-duty weld-on hinge 16mm pin | 3 to 4 |
| 150kg+ | 3.0m+ | Extra heavy weld-on hinge 20mm+ pin | 4+ |
These are general guidelines. Gate height, wind loading in the installation area, and opening frequency all affect the appropriate hinge specification. When in doubt, go one size heavier.
Further reading
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Frequently Asked Questions
What is a rising hinge and when should I use one?
A rising hinge (also called a lifting hinge) has a helical pivot that causes the gate to lift as it opens. This allows the gate to clear uneven surfaces, gravel, or a slightly sloping threshold without dragging. The gate also returns toward the closed position under gravity as the helix reverses, providing passive self-closing action. Rising hinges are not a substitute for a hydraulic gate closer on pool gates.
Do pool gate hinges need to be self-closing?
Under AS 1926.1, the gate (not just the hinge) must be self-closing and self-latching. The closing mechanism can be a hydraulic gate closer, a dedicated pool gate hinge system with integrated spring, or any other mechanism that reliably closes and latches the gate from any open position. The hinge alone (including a rising hinge) does not satisfy this requirement unless it is specifically designed and tested as a self-closing pool gate system.
How do I choose between a weld-on and bolt-on gate hinge?
Use weld-on hinges for steel gates over 40-50kg where maximum rigidity is needed. Use bolt-on hinges for lighter gates, timber applications, or anywhere you may need to remove or replace the hinge without a welder. Bolt-on hinges are easier to install and maintain; weld-on provide a stronger, more permanent connection.
How many hinges does a gate need?
Light gates up to 40kg and 1.5m wide typically need two hinges. Gates over 40kg or wider than 1.5m should have three hinges. Very heavy gates (80kg+) or tall gates (over 2.4m) should have three to four hinges. Adding a third hinge to the midpoint reduces flex in the gate frame, which is particularly important for taller gates.
What hinge material is best for outdoor gates in coastal areas?
316-grade marine stainless steel is the best choice for coastal environments. It provides excellent resistance to salt air and moisture. For non-coastal outdoor applications, 304 stainless steel or hot-dip galvanised steel are suitable and more cost-effective. Avoid zinc-plated or standard mild steel in any outdoor setting.
Can I fit a hydraulic gate closer to an existing gate?
Yes. Hydraulic gate closers are bolt-on additions that can be retrofitted to most swing gates. They are adjustable for closing speed and latching force. Make sure the closer is rated for the weight and width of your specific gate, and confirm it provides sufficient force to fully close and engage the latch in all wind conditions before relying on it for pool compliance.
Why does my gate hinge keep loosening?
Hinge bolts loosen when the gate is undersized for the load, when the post or frame flexes under wind loading, or when the hinge is too small for the gate weight. The fix is usually to upgrade to a heavier hinge, add a third hinge, or (for steel gates) switch to a weld-on design. Using thread-locking compound on hinge bolts can help as a short-term measure.
What is the Polaris 200 and is it pool-compliant?
The Polaris 200 is a soft-close hinge system made from 2205 duplex stainless steel that integrates the hinge and self-closing mechanism. It is designed specifically for pool fence gate compliance under AS 1926.1 and provides smooth, quiet operation without the visual bulk of a separate hydraulic closer. It is available from Fencing Components and is suitable for pool fence gates.
Find the right hinge for your gate.
From rising hinges and pool-compliant systems to heavy-duty weld-on options, Fencing Components stocks the full range.