Swing Gate Hinge Placement and Post Planning Guide

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Swing gate hinge placement depends on the gate leaf height, weight and opening direction, and it must be planned together with the gate posts before any concrete is poured. Hinges are positioned so the leaf stays square and carries its load on the post, not on the motor or the lock. Your installer checks the exact dimensions on site and confirms them in a written specification before fabrication starts.

Why hinge placement comes first

When people plan an electric swing gate, they often start with the motor or the remote. In practice, hinge placement decides almost everything else. The hinges carry the full weight of the leaf, and their position controls how the gate swings, how much clearance it needs and how well it stays aligned over the years.

Plan the hinges first, then size the posts, then choose the operator. Changing a hinge line after the posts are set usually means cutting, re-welding or pouring new concrete, which costs far more than getting it right on paper.

Measuring the opening and the wall

Start with an accurate on-site measurement. Record the clear opening width, the height from the finished ground to the top of the opening, and the thickness of the existing wall or the planned post. Check whether the ground slopes, because a sloped driveway changes the clearance under the leaf.

Clear opening width, measured at the top and bottom
Height of the opening and any obstacles above it
Space behind the gate for the leaf to swing fully open
Position of the power supply and the cable route

Positioning the hinges on the leaf and the post

A common layout uses two hinges per leaf, one near the top and one near the bottom, with the lower hinge taking the bulk of the weight. For heavier or taller leaves, a third hinge helps prevent sag. The hinge pins must line up on one vertical axis so the leaf rotates without binding.

Keep the hinges far enough from the leaf edges that the steel around them stays strong, and make sure the post can take the load at each hinge point. Your installer should confirm the spacing against the leaf weight and the Israeli railing standard SI 1142 where it applies, with exact values checked by the engineer.

Planning the gate posts

The posts are the foundation of the whole system. They must be strong enough to carry the hinge loads, sit plumb, and be set at the correct depth in concrete. The hinge side post usually takes the heaviest load, so it is often larger or set deeper than the latch side post.

Plan the post positions so the hinge line runs straight through both posts. Allow room for the operator arm or the mounting bracket, and leave space for any wiring conduit before the concrete goes in.

From drawing to production and finishing

After measuring, the workshop prepares a drawing and a written specification showing hinge positions, post sizes, leaf dimensions and the operator mounting points. You review and approve this before anything is cut. Once approved, the gate is produced in our factory to your measurements.

Finishing follows production. Steel gates are typically hot-dip galvanized and powder coated, which protects them from weather. Hinges and mounting plates are prepared at the same stage so they fit the posts exactly on installation day.

Installation day and checks

On installation, the posts are set and checked for plumb and level, then the hinges are mounted and the leaf is hung. The installer checks that the gate swings freely, closes squarely against the latch post and clears the ground and any obstacles through its full travel.

Verify posts are plumb and level before the concrete sets
Hang the leaf and check the gap at the top and bottom
Test the full swing, then mount and test the electric operator

Frequently asked questions

How many hinges does an electric swing gate need?

Most residential swing gates use two hinges, with a third added for heavier or taller leaves. The exact number depends on the leaf weight and size, which the installer confirms during measurement.

Should the bottom hinge carry more weight than the top hinge?

Yes, the bottom hinge usually carries most of the leaf weight, while the top hinge mainly keeps the gate aligned. Both must be mounted on solid posts so the load is spread correctly.

Can I change the hinge position after the posts are set?

It is possible but difficult, since it can mean re-cutting, re-welding or setting new posts. Planning the hinge line before the concrete is poured avoids this.

Do I need an engineer to plan the posts?

For most gates, your installer can plan the posts from measurements and the specification. Exact load values and standards are checked with the engineer before fabrication.

Common mistakes to avoid

The most common mistake is setting the posts before fixing the hinge line, which leaves the leaf out of alignment. Another is ignoring the ground slope and the swing clearance, so the gate catches on the driveway.

Our recommendation

Mark the hinge line on the wall or post with a level and check the clearance at the full swing before pouring any concrete. Ask for a written drawing and specification so the posts, hinges and operator are all planned together.

Summary

Plan the hinge line and clearance first, then size the posts to carry the load, and confirm every dimension in writing before production.

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