Technology, Contracts and Jobsite Safety
Wearables, geofencing and automated permit systems all promise a safer site. Two of the three have earned their place on ours.
Every safety product sold to contractors arrives with the same graph: incidents down, compliance up, payback in nine months. We have tested eleven of them over four years. Three are still in use.
What worked
Geofenced exclusion zones. A lifting operation defines a zone in the site model; anyone whose tag enters it while the crane is slewing gets a vibration alert and the banksman gets a light. It has interrupted four genuine incursions on one scheme. The reason it works is that it needs nobody to remember anything.
Digital permits. Hot works, confined space and temporary works permits used to live in a folder in the cabin and were therefore, in practice, issued by whoever could find the folder. Moving them onto a tablet made the approval chain visible and cut the median issue time from forty minutes to six. Faster was not the point; traceable was.
What did not
Fatigue-monitoring wearables. The data was good and the reaction was not. Operatives correctly read a device that reports their alertness to their employer as surveillance, and either left it in a locker or gamed it. We withdrew it after seven weeks. A system that depends on people not minding it has to be a system people do not mind.
Automated PPE detection on CCTV. Too many false positives at distance, and the ones it caught were the ones a walking supervisor catches anyway.
The uncomfortable part
None of this moved our headline incident rate, because our headline incident rate was already low. The gains were in near misses reported and in permits issued correctly, which are leading indicators rather than lagging ones.
That is the honest case for safety technology: it will not rescue a site with a bad culture, and on a site with a good one it removes the small number of failures that depend on somebody being perfect at four in the afternoon.
What it means for a contract
If you are specifying this on a project, put the obligation on the system and not on the operative. “The principal contractor shall provide geofenced exclusion for all lifting operations” is enforceable. “All operatives shall wear monitoring devices” is a clause that will be complied with on paper.