The 3.4 m fall, the removed guardrail and a bonus riding on the injury rate

First 60 minutes - care, then scene.

• Emergency response and hospital transfer; the injured worker's name, employer and next of kin confirmed.
• Make safe without destroying evidence: stop the hoisting operation, barricade the scaffold bay and the area below, isolate the hoist.
• Preserve: the scaffold register and tags, the removed guardrail and its fittings, the hoist sling and load, photographs from the same position and from below, a sketch with dimensions, the time and weather.
• Take statements separately and contemporaneously from the supervisor, the scaffold erector, the hoist operator and two witnesses. Record the supervisor's account as an allegation, not a finding.

Notifications:

• OHSA s24: an injury of this severity - hospital admission and likely absence well beyond 14 days - must be notified to the chief inspector as soon as possible, with the prescribed written report submitted. The CHSO checks that it was done rather than assuming.
• COIDA: the employer - the labour broker - must report the occupational injury on the prescribed form to the Compensation Fund within 7 days. The contractor is not the employer but should verify in writing that it happened; a labour broker with no reporting capacity is a known failure mode.
• Internal and client: written report to the contractor's 16(2) appointee the same day; the client's representative informed under the contract.

Do not interview the injured worker before he is medically fit, and do not let the site reopen the bay on the supervisor's word.

Reject the framing before rejecting the person. 'Didn't wear his harness' is a description of the last second of a sequence, and in this case it may not even be causal: fall arrest on a scaffold platform is a secondary system, and a harness is useless without an anchor point above the user and a rescue plan. Removing the guardrail to hoist bricks is a system act - someone permitted it, no one stopped it, and the process allowed a platform edge to be opened with no compensating control.

Method: separate immediate causes (guardrail removed; open edge; no fall arrest anchor; hoist load path over the platform) from contributing and root causes, using 5-whys or a fishbone across the management system:

• Permit and control: was there any permit or written authority to remove a guardrail, and who signed it?
• Inspection: 16 days since the last inspection and tag - the regime exists but is not operating.
• Scaffold design: was the hoisting interface designed at all, or improvised with a gin wheel over an open edge?
• Labour broker workers: were they in the induction, the fall protection plan briefing and the toolbox talk?
• Production pressure and the bonus: what does the incentive pay people to conceal?
• Supervision: one supervisor, hoisting and platform work at the same time.

Deliver findings as system facts with evidence, and put the disciplinary question in a separate, properly authorised process - mixing them into the investigation destroys the cooperation the investigation needs.

The arithmetic first, because it explains the pressure. LTIFR (200 000-hour basis) = (lost-time injuries x 200 000) / hours worked. Before the fall: (3 x 200 000) / 412 000 = 1.46 - just inside the target of 1.5. After the fall: (4 x 200 000) / 412 000 = 1.94 - target breached, and no realistic way back before the audit.

So the pressure is structural, not personal. The moment the metric became a bonus trigger it began creating an incentive to under-record - and 'first aid, no lost time' is the standard place that pressure lands.

Reclassify on the facts, not the target. He was admitted to hospital with a fractured pelvis. No reasonable classification calls that first aid. The CHSO records the injury as it is, records the definition relied on (the client's own scorecard definitions), and refers any dispute to the client in writing.

Then fix the incentive, not just the record:

• recommend the client move the bonus away from a lagging injury rate to leading indicators (permit compliance, inspection closure rate, induction completion, scaffold tag currency);
• note in the audit pack that a lagging-rate bonus creates an under-reporting risk, which is itself a finding the client should want;
• keep a parallel record of near-misses and first-aid cases so that the pressure to suppress does not simply migrate down the severity scale.

A safety professional whose value depends on a number they can edit will eventually edit it.