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Safety & OSHAaka: JHAaka: JSAaka: job safety analysisaka: task hazard analysis

Job Hazard Analysis (JHA)

In Plain English

A written breakdown of a task that identifies each step's hazards and how to eliminate them.

Definition

A job hazard analysis (JHA) is a systematic process for identifying hazards associated with each step of a work task and determining the controls needed to eliminate or reduce risk. It is prepared before work begins, reviewed with workers, and updated when conditions change. JHAs serve as the foundation for site safety plans and toolbox talks.

Why It Matters in Bidding

A JHA turns safety from a line-item assumption into a defined, costable plan, letting estimators price the specific controls, PPE, equipment, and crew time a task actually requires rather than guessing. On bid day, projects with serious fall, confined-space, or excavation exposure often demand JHAs in the safety plan, and underpricing those controls erodes margin or invites shutdowns and citations once work begins.

Example

Before bidding a steel erection package, the estimator reviews the JHA for working at heights, prices the engineered fall-arrest anchorage, controlled-access zones, and the extra crew time for tie-off, and carries it as a distinct line rather than burying it in general conditions.

Related Terms

Site Safety PlanToolbox TalkCompetent PersonOSHA

Related Tools & Templates

Job Hazard Analysis Template

Frequently Asked Questions

The competent person or supervisor responsible for the task usually drafts the JHA, often with input from the crew who perform the work and the site safety manager. It is reviewed with workers before the task starts and revised whenever methods, equipment, or site conditions change, keeping the analysis tied to actual field conditions.
A JHA is a formal, written breakdown of one task into steps, hazards, and controls, prepared before work begins. A toolbox talk is a short, recurring field briefing that often draws on the JHA to remind crews of that day's hazards. The JHA is the planning document; the toolbox talk is the daily reinforcement.
Indirectly but materially. JHAs identify controls that carry real cost, such as shoring, fall protection systems, ventilation, atmospheric monitoring, and added crew time. Estimators who use JHAs to scope these controls during the bid avoid pricing surprises, shutdowns, and OSHA exposure that otherwise surface mid-project and consume contingency and profit.

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