Construction Site Risk Matrix

Construction site risk matrix.

A construction risk matrix gives a team one view of the hazards present on a site. Place each hazard by the likelihood that it will occur and the severity of the possible harm. The point is to guide controls, not to replace a task-specific assessment. Use terms that describe actual work, such as temporary power or scaffolding, so the crew can connect each dot with the right precautions. Discuss the scores with people who know the work, then record the controls, owner, and review point outside the chart. Update the matrix as trades, equipment, weather, crews, or site controls change.

種類 マトリクス規格 2×2 / N×M quadrant conventionエンジン schematex-matrix更新日 2026/9/24

依頼内容

“A construction site risk matrix with harm severity on the horizontal axis and likelihood on the vertical axis. Plot falls from scaffolds, plant vehicle strikes, manual handling strain, dropped tools, temporary power shock, and slips on wet surfaces.”

次はこちらAdd excavation collapse as a severe risk.Move temporary power shock to more likely.

この図に含まれるもの

図の背後にある意思決定を読み解く。

01Name hazards

Use specific site activities and events.

02Estimate exposure

Place hazards using agreed likelihood and severity scales.

03Plan controls

Record controls for the risks that need immediate treatment.

Use this at planning meetings and refresh it when the site work changes.

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よくある質問

What does a construction risk matrix show?

It compares site hazards by likelihood and potential harm.

Who should contribute to it?

Supervisors, workers, and safety specialists who understand the site work.

When should it be updated?

Update it when the work scope, conditions, or controls materially change.