Construction, Contractor and High-Risk Work Safety
Construction's dominant risks
Falls from height, struck-by, caught-in/between, electrical contact, excavation collapse and plant-vehicle interaction dominate. Candidates must know the control logic for each: work at height hierarchy (avoid, prevent, mitigate), edge protection and fall-arrest with rescue planning; excavations (shoring, battering, access, gas testing, underground services survey); lifting operations (plan, competent person, exclusion zones); scaffolding (design, erection by competent persons, tagging, inspection intervals).
Contractor management cycle
Prequalification (competence, licences, insurance, HSE record) → contract with defined HSE obligations → mobilisation and induction → permit to work and interface coordination → supervision and monitoring → performance review and close-out. Traps: assuming a contractor's own HSE plan discharges the client's duty; failing to manage simultaneous operations and interface risk between contractors; and letting the permit become a paper ritual rather than a live control.
High-risk work controls
Confined space entry, hot work, work at height, lifting, excavation, electrical isolation (lock-out/tag-out) and lone working each require a specific permit, competent persons, gas testing, standby arrangements and emergency rescue provision. Rescue planning is the most commonly forgotten element - a fall-arrest system without rescue is a suspension-trauma hazard.
Worked example
Two contractors work on the same roof. Client duty: identify the interface, require a combined method statement, designate one coordinator for the shared area, coordinate permits, and confirm rescue arrangements cover both teams. The trap answer 'each contractor manages its own risk' is wrong - the interface risk belongs to the client.