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Job Hazard Analysis: How to Do One for Construction Work

Learn how to write a job hazard analysis for construction: the steps, what to document, a worked example, JHA vs JSA vs AHA, and when to update it.

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A job hazard analysis (JHA) is a task-by-task review that finds what can hurt someone before the work starts, then decides how to control each hazard. OSHA describes it as a technique that looks at the worker, the task, the tools, and the work environment to catch hazards before they cause harm. On a construction site, that means breaking a job such as setting a ladder, trenching, or a roof tie-in into steps, naming the hazard at each step, and writing a control specific enough that a crew can follow it the next morning.

This guide walks through the steps, shows what a finished entry looks like, explains how a JHA differs from a JSA and an activity hazard analysis (AHA), and covers how to keep the document alive once the project changes.

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TL;DR

Table of Contents

What a job hazard analysis is and why construction uses it

The idea is simple: look at the job, not the person. OSHA is clear that a JHA evaluates the job rather than the worker’s performance, and that involving employees improves both hazard discovery and ownership of the controls. The same OSHA publication notes a completed JHA can help establish proper work procedures, train employees, and prevent injuries and illnesses.

Construction suits this method for a practical reason. Conditions shift constantly. OSHA’s construction guidance describes hazard identification as a proactive, ongoing process because project timelines, sequencing, and work pace all change what crews face. A generic safety plan written at bid time cannot see that the crane lift is now happening beside a new excavation. A JHA written for the task, by the people doing it, can.

JHA, JSA, and AHA: what the terms mean

Three labels cause most of the confusion, so here is how they fit together.

Term | What it usually means | Where you see it

Job hazard analysis (JHA) | Breaking a job into steps, finding hazards, and setting controls | OSHA publications, general industry, construction

Job safety analysis (JSA) | The same process under a different name | Many employers, Canadian guidance

Activity hazard analysis (AHA) | A detailed analysis of one task, scope, or defined feature of work | Construction contracts and project safety plans

JHA vs JSA. The Canadian Centre for Occupational Health and Safety lists JSA, JHA, and job hazard breakdown as alternative terms for a process that breaks work into steps, identifies hazards, and recommends safer methods. Pick one term, use it across your company, and stop worrying about the difference. Search for “jha vs jsa” and you will find the same answer repeated: there is no difference in method.

AHA and the construction JHA. Construction teams often use both words on one project. Zurich’s construction risk guidance presents the project-level JHA as the document that identifies major components and high-risk scopes, which then shows where a detailed AHA is needed. The same guidance lists AHA examples such as excavation, sheeting and shoring, concrete placement, steel erection, roofing, curtain wall, waterproofing, utility tie-ins, sprinkler shutdowns, and solar-panel installation. The AHA looks at site conditions, equipment, materials, PPE, training, and how worker, task, tools, and environment interact.

A workable rule: the JHA tells you which scopes carry risk, and the AHA is the working document for each of them.

Does OSHA require a job hazard analysis?

Sometimes. OSHA’s own worksheet states that some standards require a JHA, including the Bloodborne Pathogens and Personal Protective Equipment standards, while many employers use JHAs voluntarily. In construction, your prime contract, owner requirements, or insurer may also ask for AHAs before specific work begins, so check the safety section of your contract before mobilizing.

Even where no rule names the document, a JHA is a straightforward way to show you have a process for finding and controlling hazards on the job.

The six steps of a construction JHA

The U.S. Department of Labor’s July 2024 guide lays out six steps: select and prioritize jobs, analyze all job steps, identify hazards at each step, describe the hazards, select and maintain controls, and review and update as the job changes. CCOHS reduces the same flow to five basic steps: select the job, break it into steps, identify hazards, determine controls, and communicate the results. Here is how they play out on a jobsite.

Step 1: Select and prioritize the jobs

You cannot write a JHA for every motion on a project, so start with the work most likely to hurt someone. The Department of Labor recommends prioritizing jobs with potentially severe injuries or illnesses and jobs frequently associated with injuries or near misses.

For a project-wide document, Lawrence Livermore National Laboratory’s construction guide suggests task selection should cover the complete scope and weigh unique hazards, complexity or size, worker groups, training needs, duration, and sequence. Review the drawings and ask how each major activity will be performed, from mobilization through access, utilities, testing, and site restoration.

A short list for a typical commercial build might be excavation, steel erection, work at height, hot work, and a utility shutdown. Your own list will depend on the scope of work.

Step 2: Break the job into steps

Write the steps in the order they happen. CCOHS advises keeping steps in correct sequence, starting each with an action verb, and generally describing a job in fewer than ten steps. If you need more, split the work into segments or combine steps that belong together.

Do this with the foreman and a crew member who has done the job. Walk the work area. A step list written at a desk tends to skip the awkward parts: the lift that needs a second person, the access route that floods after rain.

Step 3: Identify the hazards at each step

For every step, ask what could go wrong before work begins and while it is underway. OSHA’s worksheet prompts you to consider slips, trips, and falls; struck-by and caught-in hazards; migration of materials; noise and vibration; chemical exposure; heat; fire or explosion; pressure; electrical contact; ergonomic strain; and combustible dust.

The Department of Labor’s guide adds categories to check: machine-related, physical-barrier, biological, chemical, and ergonomic hazards. It also suggests asking who, what, when, where, and why about each hazard, which pushes you past a vague label like “fall hazard” toward the real situation.

Ground work deserves its own attention. If the task involves slopes, excavations, or unstable soil, a structured geotechnical risk workflow can help you decide when ground conditions should trigger a closer look before crews are sent in.

Step 4: Describe each hazard clearly

Name the hazard, the source, who is exposed, and the likely outcome. “Worker on ladder may fall when the ladder shifts, causing serious injury or death” gives the crew something to react to. “Ladder hazard” does not. The LLNL guide uses a ladder fall in exactly this way, noting the result can be injury or death.

Step 5: Select, install, and maintain controls

OSHA recommends selecting, installing, maintaining, and reviewing controls using the hierarchy of controls. In practice, that means you first ask whether the hazard can be eliminated or engineered out, then fall back on administrative measures and PPE only for what remains.

Be specific. LLNL’s guide says controls should be understandable and gives the example of naming disposable 5-mil nitrile gloves instead of writing that workers will wear gloves. The same principle applies to “use fall protection”: say which system, anchored where, inspected by whom.

Step 6: Review and update

A JHA is not a form you file. OSHA’s worksheet says to review it when the job changes or an injury or illness occurs, and periodically to confirm it is still accurate. More on that below.

A worked example: setting up and using a ladder

Here is what one finished entry might look like. It is illustrative, built from the structure the sources describe, and should be adapted to your site, your equipment, and your safety professional’s judgment.

Job step | Hazard | Control

Inspect the ladder | Damaged rail or rung gives way under load | Inspect before each use; tag and remove damaged ladders from service

Place the ladder on the work surface | Base slips on uneven or wet ground; ladder contacts overhead power | Level base on firm footing; survey overhead lines before placing; use a non-conductive ladder near electrical sources

Climb with materials | Loss of balance; dropped tools strike workers below | Maintain three points of contact; hoist tools by line or use a tool belt; barricade the area beneath

Work at the top | Overreach tips the ladder | Keep your belt buckle within the rails; reposition instead of leaning

Lower and store | Strain from carrying; ladder falls in storage | Two-person carry for long ladders; secure in the storage rack

Notice how each control is an action someone can verify. That matters when a supervisor walks the site and needs to know in ten seconds whether the control is in place.

What a construction JHA should document

The LLNL guide says a construction JHA should capture task descriptions, personnel and environmental hazards, and specific controls, organized into sections for boundaries, prerequisites, emergencies, engineering controls, administrative measures, PPE, and environmental or waste controls. Turning that into a checklist for your own form:

Training records belong in this picture, because a control that depends on a certification is only real if you can show the crew member holds it. Our guide on what to record for training compliance covers the fields that matter.

Using the JHA with your crew

A well-written JHA that stays in a binder protects nobody. OSHA’s worksheet recommends reviewing the controls with workers, having them attempt the job steps with the controls in place, gathering their feedback, and monitoring whether controls are being bypassed. That feedback loop is where JHAs improve. If the crew keeps skipping a control, the control is probably inconvenient or unclear, and that is a design problem to fix.

CCOHS also frames the JHA as a communication tool, one that can support training, supervisor and worker contact, inspections, and incident investigations. A few habits make that real:

  1. Brief the JHA at the start of the task, not the start of the project.
  2. Ask the crew what the document missed. Write their answers into the next version.
  3. Walk the site against the document and note any control that is absent or bypassed.
  4. Tie observations back to the JHA so patterns show up. A structured safety observation program helps you fix systemic risks instead of chasing the same finding on every site.
  5. When something goes wrong, use the JHA in the investigation, and follow a clear incident reporting workflow through to closure.

When to review and update a JHA

Review triggers are simple:

For daily conditions, Zurich describes a daily hazard analysis as a review of the day’s activities and site conditions, completed before work, after a shift change, or when conditions change. Think of the JHA as the plan and the daily review as the check that the plan still fits today’s site.

Our perspective: a JHA is only as good as the record behind it

Most JHA failures we see are not failures of analysis. The hazards were identified. The problem is the handoff: the analysis lives on one form, the crew assignment on another, the training record in a third place, and the field photos on someone’s phone. When something goes wrong, nobody can show that the right people were assigned, trained, briefed, and watched.

That is why we built Hawkeye around a connected, audit-ready record that runs from field activity to office review. Configurable workflows capture operational context from assignment through billing, so each handoff is clear and traceable. A JHA sits naturally in that chain: tied to the job, to the crew on it, to their readiness, and to what the site actually looked like that day.

Our approach to jobsite safety pairs observations with mobile surveillance, so a supervisor in the office can keep situational awareness of a remote site without being on it. We think safety, labor, and billing records belong together, because the same facts answer all three questions.

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Bringing the JHA into your daily field workflow

Paper JHAs are not wrong, but they are hard to search, hard to connect to crews, and easy to lose. Moving the form to a digital workflow gives you three things: the analysis attached to the work order, a time-stamped record of who was briefed, and a trail you can pull when an owner or insurer asks. If you are moving off paper, start with digital work orders so the JHA travels with the job.

Photos strengthen the record. A before-and-after set showing the barricade, the anchor point, or the shoring is stronger evidence than a checked box, and our checklist on jobsite photo documentation shows what to capture at each phase. For sites you cannot visit daily, jobsite safety monitoring combines observations, cameras, and alerts so supervisors can see whether controls are in place.

See how Hawkeye connects the JHA to the field record

Hawkeye Field Ops brings crew scheduling, job planning, daily work records, and labor and equipment tracking into one platform, with mobile surveillance for remote site monitoring and workforce readiness tracking alongside it. If your JHAs are scattered across forms and your crews’ training records live elsewhere, a walkthrough is the fastest way to see how the pieces fit for construction operations.

Explore Hawkeye Field Ops or see how Hawkeye Workforce Readiness tracks the training your controls depend on.

FAQ

What are the 5 steps of a job hazard analysis?

CCOHS lists five basic steps: select the job, break it into sequential steps, identify the hazards, determine the preventive controls, and communicate the results. The Department of Labor’s guide expands this to six by adding prioritization up front and a review step at the end. Both describe the same cycle.

Does OSHA require a job hazard analysis?

Some OSHA standards require one, including the Bloodborne Pathogens and Personal Protective Equipment standards, and many employers use JHAs voluntarily. Contracts and insurers on construction projects often ask for them as well. Check your contract’s safety requirements before the work begins.

What is the difference between a JHA and an AHA?

The JHA is the broader review of a job or project and points to its high-risk scopes. The AHA is the detailed analysis of one activity, such as excavation, roofing, or steel erection, including site conditions, equipment, materials, PPE, and training.

Is a JHA the same as a JSA?

Yes. Job safety analysis, job hazard analysis, and job hazard breakdown are alternative names for the same process. Choose one term and use it consistently across your forms and training.

Who should help write a JHA?

The supervisor or foreman and the workers who perform the task. OSHA notes that employee participation improves hazard discovery and ownership of the controls, and the analysis is of the job, not of any individual’s performance.

Sources

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