JHA / JSA / AHA builderCold Weather Concrete Protection JHA
A JHA breaks the work into steps, hazards and controls. Use this example to build a draft for your actual job and review it with your crew.
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Step 1 of 4 · Working draft
Your job
Tell Jenkins what you’re planning and where the work will happen. Use the actual job details.
Use the published example’s suggestions when they fit your task, or write your own steps. These are planned controls, not verified worksite conditions.
Describe an observable step, how someone could be harmed, and the control that acts on that hazard. Identify who checks it and what evidence is needed.
Walk through the plan with the people doing the work. Resolve missing controls and agree who checks them. Moving to the next step does not approve the work.
Confirm people, equipment and emergency arrangements
Record changes, checks, and open actions
Walk the work area, review with the crew, and resolve missing controls. Follow the required approval process. This tool does not judge completeness, verify signatures or authorize work.
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Your Cold Weather Concrete Protection JHA
Walk through the job in order. Use these possible hazards, planned controls and checks to start a conversation about your actual work.
011. Release the protection plan
Possible hazards: Unplanned heating can expose workers or conceal an unsafe slab condition.
Planned controls: Concrete lead establishes protection limits, monitoring locations and responsible attendants. Confirm blanket access will not damage the slab and separate curing criteria from any structural loading release.
Check before work: Lead checks the plan and slab handover before blanket installation.
022. Install blankets and enclosure
Possible hazards: Wind can move coverings; frames, ties and cords can block exits or create trip hazards.
Planned controls: Secure the enclosure using the planned supports and wind limits. Lay blankets from released access and keep designated exits and walking routes clear; protect heater clearances.
Check before work: Foreperson checks tie security and exits before enclosure use.
033. Position the external heater
Possible hazards: Exhaust entering a doorway or intake can cause carbon-monoxide poisoning; hot ducts can ignite coverings.
Planned controls: Assigned heater operator positions the indirect-fired unit, exhaust and ducts using its instructions and required clearances. Verify ventilation and combustion separation; do not rely on smell or a CO alarm as the sole control.
Check before work: Operator and lead check the complete air and exhaust route before startup.
044. Start and monitor heating
Possible hazards: A heater fault, blocked airflow or temperature change can create fire or exposure.
Planned controls: Trained attendant performs specified startup checks and monitors heater condition, enclosure air and concrete temperature at planned intervals. Use selected exposure monitoring where required; stop for alarms, symptoms or unsafe airflow.
Check before work: Attendant records actual readings and actions rather than copying planned values.
055. Refuel and transfer attendance
Possible hazards: Unattended malfunction or fuel near hot equipment can create a fire.
Planned controls: Follow the unit’s shutdown and cooling instructions for fuel service. Transfer responsibility, readings, fuel arrangements, limits and emergency actions to the next attendant; do not leave a system unattended unless its instructions and site plan permit.
Check before work: Outgoing and incoming attendants confirm the handover and contact method.
066. Remove protection by release
Possible hazards: Early removal, hot ducts or unsecured coverings can expose the next crew.
Planned controls: Obtain the concrete lead’s protection-removal release, shut down and cool the heater, and remove coverings in the planned sequence. Secure equipment and communicate remaining access or loading restrictions.
Check before work: Lead records release and checks the cleared access before handover.
Example scope and starting conditions
A concrete crew will protect a newly placed ground-level building slab with specified insulating blankets and a temporary enclosure heated by an indirect-fired unit located outside. A designated attendant monitors the arrangement. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The concrete protection plan establishes temperature monitoring and the conditions for changing or removing protection.
- Heater, duct, ventilation and exhaust arrangements follow the actual unit instructions and site fire plan.
- Concrete placement, direct-fired indoor heaters and stripping or strength-based loading are outside this example.
Know when to pause
- Exhaust path, ventilation or heater clearances change.
- CO alarm, exposure symptoms, fire, heater fault or lost monitoring.
- Wind affects enclosure stability or concrete temperatures leave planned limits.
After a pause, correct the condition, reassess the work, and obtain required authorization before restarting.
Free example and template
No account required. The worked example contains planned controls. The blank template is for your own work; neither includes fabricated inspection results, signatures or approval.
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For managers
Does the team have what it needs to carry out the plan? Give the crew time, equipment and support, and make it clear who will resolve anything that is missing.
Manager checks and supporting resources
Confirm the people doing the work have the time, equipment, information and support to carry out the plan. Agree who checks the controls and who resolves open actions.
Questions to resolve before work
- Who sets the concrete temperature criteria and reviews records?
- Where will combustion exhaust go relative to intakes and occupied areas?
- How are enclosure exits, fire clearances and monitoring maintained overnight?
Training and qualifications to confirm
- Actual heater setup, ventilation, fuel service and emergency shutdown instruction.
- Concrete protection monitoring, exposure response and shift-handover responsibilities.
Confirm the actual training evidence for the assigned people. A toolbox talk does not establish competence.
Decisions that change the plan
Does reaching the curing temperature authorize form removal or loading?
No. Those decisions need their separate documented strength and design criteria. This analysis covers protection and heating, not structural acceptance.
What must the crew record for actual use?
Identify the actual equipment and work boundaries, responsible people, applicable criteria, inspection findings and open actions. Resolve changes with affected crews and obtain required project authorization before work.
Keep planning connected
Resources that support this JHA
Additional tools for task planning and safe work. Start with the free resources; explore paid options only when they meet an additional need.
Toolbox talks for the work
Prepare a practical crew discussion.
Temporary Heaters: Check the Setup Before Use →Carbon Monoxide: Keep Exhaust Out of the Work →Cold Weather: Check Warmth, Traction and Recovery →
Safety program resources
Review procedures, roles, and requirements.
Browse the existing catalog and confirm the scope and purchase availability of each program.
Browse safety programs →
Paid service · Availability
Task-specific training and qualifications
Explore applicable training and qualification needs.
Task-specific training services are not currently available to book here. Start with the free training-needs lookup; a toolbox talk or online course alone does not establish competence or employer authorization.
Review training needs · Free →People, equipment, emergency arrangements and open actions are recorded in the guided JHA’s Crew review step.
Open the crew review step →For safety professionals
How do we know the planning process and controls are working? Connect what the crew reports with field checks, risk decisions and the evidence behind your system.
Industry context, SIF, control verification and AHA review
Guidance and evidence
Review the method, risk decisions and evidence behind the plan. Use the actual jurisdiction, equipment instructions, employer process and project requirements.
Task-by-task control and verification rationale
1. Release the protection plan
Hazard: Unplanned heating can expose workers or conceal an unsafe slab condition.
Control: Concrete lead establishes protection limits, monitoring locations and responsible attendants. Confirm blanket access will not damage the slab and separate curing criteria from any structural loading release.
Verification: Lead checks the plan and slab handover before blanket installation.
Why this belongs in the analysis: Temperature protection is not evidence of safe structural loading.
2. Install blankets and enclosure
Hazard: Wind can move coverings; frames, ties and cords can block exits or create trip hazards.
Control: Secure the enclosure using the planned supports and wind limits. Lay blankets from released access and keep designated exits and walking routes clear; protect heater clearances.
Verification: Foreperson checks tie security and exits before enclosure use.
Why this belongs in the analysis: Covering the slab must not remove escape access.
3. Position the external heater
Hazard: Exhaust entering a doorway or intake can cause carbon-monoxide poisoning; hot ducts can ignite coverings.
Control: Assigned heater operator positions the indirect-fired unit, exhaust and ducts using its instructions and required clearances. Verify ventilation and combustion separation; do not rely on smell or a CO alarm as the sole control.
Verification: Operator and lead check the complete air and exhaust route before startup.
Why this belongs in the analysis: External placement alone does not prevent exhaust recirculation.
4. Start and monitor heating
Hazard: A heater fault, blocked airflow or temperature change can create fire or exposure.
Control: Trained attendant performs specified startup checks and monitors heater condition, enclosure air and concrete temperature at planned intervals. Use selected exposure monitoring where required; stop for alarms, symptoms or unsafe airflow.
Verification: Attendant records actual readings and actions rather than copying planned values.
Why this belongs in the analysis: A monitoring plan needs real observations to function.
5. Refuel and transfer attendance
Hazard: Unattended malfunction or fuel near hot equipment can create a fire.
Control: Follow the unit’s shutdown and cooling instructions for fuel service. Transfer responsibility, readings, fuel arrangements, limits and emergency actions to the next attendant; do not leave a system unattended unless its instructions and site plan permit.
Verification: Outgoing and incoming attendants confirm the handover and contact method.
Why this belongs in the analysis: Cold-weather protection often spans shifts.
6. Remove protection by release
Hazard: Early removal, hot ducts or unsecured coverings can expose the next crew.
Control: Obtain the concrete lead’s protection-removal release, shut down and cool the heater, and remove coverings in the planned sequence. Secure equipment and communicate remaining access or loading restrictions.
Verification: Lead records release and checks the cleared access before handover.
Why this belongs in the analysis: Curing-protection removal and structural acceptance are separate decisions.
Compare control wording
| Needs improvement | More useful for this scenario |
|---|---|
| Work carefully and wear PPE. | Assigned heater operator positions the indirect-fired unit, exhaust and ducts using its instructions and required clearances. Verify ventilation and combustion separation; do not rely on smell or a CO alarm as the sole control. |
| Check that everything is ready. | Concrete lead establishes protection limits, monitoring locations and responsible attendants. Confirm blanket access will not damage the slab and separate curing criteria from any structural loading release. |
Common questions
Can this example be used as a JSA?
Adapt its Task | Hazard | Control analysis to the employer’s format and actual conditions. The example is a teaching aid, not evidence that controls were checked.
What changes if the project requires an AHA?
Use the governing AHA format, risk method, supporting records and acceptance process. The published formwork AHA demonstrates that additional structure; changing a JHA title does not supply it.
Are these resources part of a paid course?
This walkthrough, browser draft builder and downloads are free public resources, separate from Academy course enrollment.
References and source note
- OSHA 1926.154 Temporary heating devices
- OSHA 1926.21 Safety training and education
- OSHA 1910.1200 Hazard communication
Original instructional scenario with planned controls. Primary references support hazard planning. Use actual equipment and product instructions, project design and employer requirements to establish field criteria. Use actual equipment instructions and site requirements alongside these references. Reference review: October 9, 2026.
Developed by Todd Jerome Jenkins, MS, CSP · Edition v1.0 · October 9, 2026
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