A construction company experienced 3 recordable injuries in the past year. Their 150 employees worked a total of 300,000 hours. Calculate the TRIR.

A large multinational engineering firm has 850 employees working full-time (40 hours per week for 50 weeks). In addition, they have 150 part-time workers averaging 1,000 hours per year. During the year, they recorded 12 injuries. Calculate their TRIR.

A general contractor is evaluating two subcontractors for a high-risk project. Subcontractor A had 4 recordable incidents with 450,000 hours worked. Subcontractor B had 1 recordable incident with 80,000 hours worked. Which subcontractor has the better safety record based on TRIR?

A framing crew repeatedly ignored minor tripping hazards caused by discarded lumber offcuts. Several workers had minor trips without injury (near-misses). One worker sprained an ankle (minor injury) but the hazard remained. Eventually, a worker tripped while carrying a heavy beam, falling off an unguarded leading edge and suffering severe injuries. Analyze this using the Heinrich Triangle.

A tower crane operator frequently reported minor headaches and dizziness (near-misses/minor incidents). The site supervisor initially attributed it to dehydration and told the operator to drink more water. The symptoms persisted until the operator briefly lost consciousness and dropped a load, narrowly missing a crew below. Perform a basic root cause analysis to find the systemic failure.