Article · 2026-03-19
Force testing explained: the fifteen minutes that make a gate legal
Force testing measures the actual force an automated gate exerts on an obstruction, using a calibrated meter placed at defined points in the gate's travel. BS EN 12453 caps both the peak force and how quickly it must decay. It's the only way to verify a gate is safe — settings can't be judged by eye — and a documented test is what separates a compliant machine from an assumption.
What actually happens during a test
The engineer places a calibrated force meter — a load cell between two plates — at specified measurement points: the closing edge at 50mm, 300mm and 500mm openings, plus designated points along the travel and at any crush zone against piers or posts. The gate is run against the meter, which records the force-time curve: the peak dynamic force, how fast it falls, and the residual static force. Each point gets tested, each reading recorded against the standard's limits for that location and gap width.
Fifteen to twenty minutes per gate, and at the end there is a number against a limit for every hazard point — not an opinion, a measurement. Those readings go in the commissioning or service report.
Why "it reverses when I push it" isn't a test
A healthy adult pushing a leaf tests nothing relevant: the standard's limits exist to protect a small child's head or chest in a closing gap, and the survivable numbers are far below what feels 'gentle' to an adult hand. Force also varies along the travel — a gate that yields softly mid-arc can still develop crushing force in the final 100mm where leverage changes — and drifts over time as hinges stiffen and mechanics wear. That drift is why testing is repeated at every service, not performed once and framed.
What to do with this as an owner
- Find your paperwork: commissioning force test and Declaration of Conformity. Missing? Your installation was likely never verified.
- Book a test — standalone assessments and first services (costs here) include full force testing.
- If readings fail, remediation is usually adjustment, safety edges or photocell additions — £400–£900 in most cases, per the standards page — not a new gate.
- Keep the reports. For shared entrances they are the residents' association's evidence of duty of care; for everyone they're what a well-managed machine looks like on paper.
Free site survey & fixed quotation
Get a precise price for your gates
Tell us the opening width, whether power is nearby and the style you have in mind. We measure on site, confirm a fixed price in writing, and never sell door-to-door.
Prefer to talk? Call 01483 000 000.
Frequently asked questions
How often should gate forces be tested?
At commissioning, after any modification or repair affecting movement, and at every service — annually for residential gates, six-monthly for shared entrances.
Can force limits just be turned down until everything passes?
Down to a point — below the necessary working force the gate stalls in wind. Compliance is a balance of force settings, safety edges and photocells per hazard zone; that's the engineering in the test.