Job Hazard Analysis and Site Emergency Response

What Is a Job Hazard Analysis?

A Job Hazard Analysis (JHA) — sometimes called a Job Safety Analysis (JSA) — is a written document that breaks a work task into individual steps, identifies the potential hazard at each step, and records the control measure that will eliminate or reduce that hazard. NCCER and OSHA both recognize the JHA as a core tool for preventing injuries before work begins. The simple three-column format keeps thinking organized: Task Step | Potential Hazard | Control Measure.

A good JHA is specific. Vague entries like "be careful" are not acceptable controls. Instead, write what a worker must actually do, wear, or use: "Wear ANSI Z87.1-rated safety glasses and nitrile gloves during mixing."

Writing a JHA Step by Step

1. Select the task. Choose a task with enough steps to matter — typically four to ten discrete actions. For example, ladder-assisted sheathing installation involves: staging materials, setting the ladder, climbing, fastening panels, descending, and moving the ladder.

2. Break the task into ordered steps. Walk through the task mentally or physically. Write each step as a short action phrase: "Position extension ladder against wall." Sequence matters — controls for an earlier step may affect later ones.

3. Identify hazards at each step. Ask: What could go wrong here? Who or what could be hurt? Think about struck-by, caught-in, fall, electrical contact, ergonomic strain, and harmful substance exposure. For concrete mixing by hand, a realistic hazard at the "add water" step is skin contact with wet concrete, which is caustic and can cause chemical burns with prolonged exposure.

4. Write specific controls. Controls follow the hierarchy of controls: Elimination → Substitution → Engineering controls → Administrative controls → PPE. You may use more than one control per hazard. PPE is always a last layer, never the only layer. For example, for wet concrete contact: Engineering — keep bucket on stable surface to prevent spills; PPE — wear waterproof gloves and rubber boots; Administrative — limit exposure time and rinse skin immediately if contact occurs.

5. Review the JHA before work begins. The crew supervisor reviews the completed JHA with all workers on that task. Each worker signs to confirm they have read and understood it. This is not just paperwork — it is a brief that keeps everyone aligned.

Peer Review of JHAs

Having a second set of eyes on a JHA catches missed steps and vague controls. When reviewing a peer's JHA, use the rubric to check three things:

• Is every distinct task step listed in the correct order?
• Is each hazard realistic and specific to that step?
• Is each control measurable and actionable (not just "use caution")?

Write your feedback in specific, professional language. Saying "Step 3 hazard is too vague — specify the type of fall hazard and the height involved" is more useful than *"needs more detail."

Site Emergency Response: The Correct Sequence

When an injury or emergency occurs on a construction site, the seconds immediately after the event determine outcomes. Every worker must know the correct sequence before an emergency happens.

Step 1 — Recognize and announce. Shout a clear alert so nearby workers know there is an emergency. Do not assume someone else has noticed.

Step 2 — Protect the scene. Keep bystanders back. Do not move an injured worker unless there is an immediate life threat (fire, structure collapse). Moving a trauma patient incorrectly can worsen spinal or internal injuries.

Step 3 — Activate EMS. Direct a specific person — point and say their name or description — to call 9-1-1. Giving a vague command to a crowd often results in no one calling. If you are alone, call yourself immediately.

Step 4 — Provide scene information to the dispatcher. The dispatcher needs: (a) the exact street address or site location, (b) the nature of the injury (fall from height, struck by object, chemical exposure, cardiac event), (c) the number of people injured, and (d) your name and callback number. Stay on the line until released by the dispatcher.

Step 5 — Control hazards. If safe to do so, shut down nearby equipment, establish a clear path for EMS, and post a worker at the site entrance to direct responders.

Step 6 — Document with the First Report of Injury form. After EMS has responded and the scene is stabilized, a supervisor completes a First Report of Injury (or Illness) form. This form captures: worker name, date and time, exact location on site, description of what happened, body part affected, and names of witnesses. This document feeds into OSHA recordkeeping requirements and workers' compensation processes. Accuracy is critical — complete it while details are fresh.

PPE and Lockout/Tagout Reminders

During any hands-on task covered by a JHA, standard site PPE applies as a baseline: hard hat, safety-toed footwear, and safety glasses at minimum. Task-specific PPE (gloves, hearing protection, respiratory protection, fall protection) is added as the JHA dictates.

If a task step involves working near or on equipment that could be energized, the JHA must reference lockout/tagout (LOTO) procedures. LOTO is not optional — it is the required method for controlling hazardous energy before workers perform service or maintenance on equipment.

Connecting to Your Credentials

The JHA and emergency response procedures appear in NCCER Core and NCCER Construction Technology curricula, and they are central to the OSHA 10 Outreach training content. Mastering these skills now means you can apply them on any job site, for any employer, anywhere in the country.