My Chain Link Double Gate Sags in the Middle — How Do I Fix It?

A sagging chain link double drive gate is a common problem even on installations that were done correctly to begin with — the weight of the swinging side, combined with years of daily use, gradually works hardware loose. The fix depends on correctly identifying which part actually failed.

Common Causes

Sagging is generally traced to one of a few specific causes: the sheer weight of the open side of the gate pulling on its hinges over time, hardware that was undersized for the gate’s actual weight from the start, or a hinge post that isn’t structurally strong enough to support the load without gradually leaning.

Step 1: Check the Hinges

One of the most common causes of a chain link gate becoming misaligned is the gradual shift of the hinges themselves — over years of use, hinge bolts loosen and the pivot point shifts slightly, which is often enough on its own to cause visible sag. This is frequently fixable with basic tools: an open-end wrench or pliers, a marker to note the current position, and a small level to re-square the gate before re-tightening everything down.

Step 2: Check the Tension Wire and Mesh

If the hinges check out fine, look at the fence system feeding into the gate. A stretched or broken tension wire, or mesh that’s become deformed or damaged near the gate opening, can create the appearance of a sagging gate when the real problem is upstream in the fence line itself.

Step 3: Anti-Sag Diagonal Cable

If the frame itself has racked out of square — a common outcome once a chain link gate frame has taken years of hinge-side torque — a diagonal cable support system (the same anti-sag principle used on wood gates) can correct it. The cable runs diagonally from the top of the hinge side to the bottom of the latch side, with a turnbuckle to tension it back into a square position.

When It’s the Post, Not the Gate

If tightening hardware and adding diagonal support doesn’t resolve the sag, or the sag returns quickly after a fix, the hinge post itself may have begun to lean under the accumulated load — this is a more involved repair (resetting or reinforcing the post) but addressing it now is far cheaper than repeatedly re-fixing a gate that’s fighting a compromised post.

Double Gate-Specific Hardware

Remember that a double drive gate also needs at least one drop rod to hold one panel in a fixed position when closed — if that hardware is missing, worn, or misaligned with its ground center stop, it can look and feel like a sagging problem even when the hinges and posts are fine.