JHA / JSA / AHA builderEmbedded Concrete Maturity Monitoring 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 Embedded Concrete Maturity Monitoring JHA
Walk through the job in order. Use these possible hazards, planned controls and checks to start a conversation about your actual work.
011. Establish the monitoring and calibration basis
Possible hazards: An unmatched mix curve or default equation can produce a persuasive but inappropriate strength estimate that someone later uses for structural release.
Planned controls: Monitoring lead matches the actual placement and mix identity to the independently accepted calibration and project monitoring plan. Obtain required equation, units, constants, locations and corroboration requirements from the responsible reviewer. Resolve changes before enabling strength estimates. A manufacturer's general description of maturity does not supply the site's calibration or authorize the next construction activity.
Check before work: Lead records the accepted mix/calibration link and actual reporting requirements.
022. Identify equipment and prepare protected installation access
Possible hazards: A mislabeled sensor or unsafe route across reinforcement can injure an installer and associate data with the wrong concrete location.
Planned controls: Match sensors, reader and software configuration to the applicable instructions and make the required equipment checks. Assign unique placement and sensor records before concealment. Use the released work route with opening and protrusion protection and arrange manageable ties and leads. Do not climb reinforcement, displace supports or enter an unaccepted form area to reach a preferred sensor position.
Check before work: Installer checks component identities, software compatibility and protected access before fitting.
033. Secure sensors and preserve the lead interface
Possible hazards: A displaced sensor, damaged lead or incorrectly recorded position can prevent useful data and encourage entry into a later restricted pour area.
Planned controls: Install the specified sensors at the plan's released locations through the actual system method, using suitable securement without altering reinforcement. Protect exposed leads and connection points from the separate placing and finishing operations while keeping walkways clear. Record actual positions and identify any unsuitable location for reviewer disposition. Do not relocate a sensor solely for convenience or improvise field cable repair.
Check before work: Monitoring lead verifies prescribed locations, securement and protected data-access interfaces.
044. Coordinate placement identity and establish the data record
Possible hazards: A guessed cover time, wrong time zone or sensor assigned to another pour can distort the temperature history and resulting maturity calculations.
Planned controls: Brief the placement lead on sensor protection and the planned observation interface without directing concrete placement. Assigned personnel record the actual time concrete covers each sensor and retain the correct placement, units and sensor identity in the data system. Use protected observation positions and hold damaged or displaced devices for review. Adding a label to software is not proof that recorded measurements have been collected.
Check before work: Lead checks actual placement timestamps, identities and reported sensor condition.
055. Collect data and identify limitations
Possible hazards: Missing downloads, stale timestamps or selectively omitted readings can make an incomplete history look like valid current strength evidence.
Planned controls: Collect stored data through the selected matching reader method from the planned protected positions. Check identities, updated timestamps, continuity and required sensor coverage before interpreting a report. Maintain access and curing restrictions and transfer monitoring ownership across shifts. Report missing or abnormal history to the responsible reviewer; never replace observations with assumed values, conceal a failed sensor or enter an unsafe area to obtain a reading.
Check before work: Assigned checker records collection status, actual data gaps and reviewer notifications.
066. Report evidence while preserving release holds
Possible hazards: A graph or alert can be mistaken for permission to strip forms, remove support or load concrete without the required engineering determination.
Planned controls: Prepare traceable reports linking the real placement, sensor locations, complete history and accepted calibration inputs. Send required corroborating findings and unresolved limitations to the designated authority. Keep the separate construction action held until its actual release is obtained. Protect remaining leads and monitoring ownership through the accepted handover; do not drill or chip out embedded equipment through this analysis.
Check before work: Receiving reviewer confirms report basis, limitations and the continuing construction-release hold.
Example scope and starting conditions
A trained monitoring crew will install identified COMMAND Center sensors at released locations in a building slab before a separately controlled pour. Protected sensor leads allow later Bluetooth data collection through the matching sensor reader. The accepted mix-specific calibration supports reported maturity-based strength estimates; actual construction release belongs to the responsible authority. This fictional learning example describes planned controls and records no actual inspection or work authorization.
- The monitoring plan identifies the concrete mix, accepted strength-maturity relationship, equation inputs, sensor locations, reporting interval and verification requirements. Calibration is independently supplied and accepted; an available temperature chart does not establish a valid strength estimate.
- The actual sensors, reader, software and compatible instructions are identified. Retrieved COMMAND Center System User Guide v4.3 supports installation, timestamp and data handling; the responsible lead resolves any version difference before field use.
- Curing activity 238110-24 is a partial connection: embedded time-temperature evidence and mix-calibrated estimates only. Laboratory calibration, acceptance-cylinder production, concrete placement, curing application, intrusive sensor recovery and form, shore or load release are excluded.
Know when to pause
- The actual mix, accepted calibration, equation inputs, sensor location plan or applicable equipment instructions is uncertain.
- Sensor position, identity, lead condition, concrete-cover timestamp or actual data history differs from the monitoring plan.
- An estimate or software alert is being treated as automatic permission for form removal, support changes or structural loading.
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
- Which accepted mix calibration and equation inputs apply to this actual placement?
- Where will each sensor be secured and its lead protected without changing reinforcement or required access?
- Who checks data completeness and corroborating evidence before any separate construction-release decision?
Training and qualifications to confirm
- Actual COMMAND Center sensor/reader/software instruction on identity, placement time, protected installation, data collection and report traceability.
- Instruction on the accepted maturity plan, mix-specific calibration limitations, missing or suspect data response and separate strength/load-release authority.
Confirm the actual training evidence for the assigned people. A toolbox talk does not establish competence.
Decisions that change the plan
Can the previous pour's calibration be reused when this mix changes?
Only the responsible testing/design process can establish that the calibration applies. Hold strength estimates based on an unaccepted mix relationship and document the change. Valid temperature observations can remain useful when clearly labeled, but neither a renamed curve nor a plausible graph supplies the required strength basis or construction release.
What must the monitoring crew record for actual use?
Record placement and mix identity, accepted calibration/report reference, equation inputs, sensor locations and serials, applicable equipment/software instructions and installation findings. Preserve actual concrete-cover times, raw histories, collection events, gaps and corroborating evidence. Identify monitoring ownership and reviewer dispositions without inventing readings, attained strength or permission to change structural support.
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.
Form Stripping: Verify the Release and Reshoring →Independent Verification: Confirm Without Being Led →Slips and Trips: Temporary Walkways →
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. Establish the monitoring and calibration basis
Hazard: An unmatched mix curve or default equation can produce a persuasive but inappropriate strength estimate that someone later uses for structural release.
Control: Monitoring lead matches the actual placement and mix identity to the independently accepted calibration and project monitoring plan. Obtain required equation, units, constants, locations and corroboration requirements from the responsible reviewer. Resolve changes before enabling strength estimates. A manufacturer's general description of maturity does not supply the site's calibration or authorize the next construction activity.
Verification: Lead records the accepted mix/calibration link and actual reporting requirements.
Why this belongs in the analysis: A maturity estimate depends on the relationship for the identified concrete, not temperature alone.
2. Identify equipment and prepare protected installation access
Hazard: A mislabeled sensor or unsafe route across reinforcement can injure an installer and associate data with the wrong concrete location.
Control: Match sensors, reader and software configuration to the applicable instructions and make the required equipment checks. Assign unique placement and sensor records before concealment. Use the released work route with opening and protrusion protection and arrange manageable ties and leads. Do not climb reinforcement, displace supports or enter an unaccepted form area to reach a preferred sensor position.
Verification: Installer checks component identities, software compatibility and protected access before fitting.
Why this belongs in the analysis: Preserving device identity and a safe work position begins before the sensor disappears into concrete.
3. Secure sensors and preserve the lead interface
Hazard: A displaced sensor, damaged lead or incorrectly recorded position can prevent useful data and encourage entry into a later restricted pour area.
Control: Install the specified sensors at the plan's released locations through the actual system method, using suitable securement without altering reinforcement. Protect exposed leads and connection points from the separate placing and finishing operations while keeping walkways clear. Record actual positions and identify any unsuitable location for reviewer disposition. Do not relocate a sensor solely for convenience or improvise field cable repair.
Verification: Monitoring lead verifies prescribed locations, securement and protected data-access interfaces.
Why this belongs in the analysis: The measured temperature represents the sensor's actual location, which must remain known and suitable.
4. Coordinate placement identity and establish the data record
Hazard: A guessed cover time, wrong time zone or sensor assigned to another pour can distort the temperature history and resulting maturity calculations.
Control: Brief the placement lead on sensor protection and the planned observation interface without directing concrete placement. Assigned personnel record the actual time concrete covers each sensor and retain the correct placement, units and sensor identity in the data system. Use protected observation positions and hold damaged or displaced devices for review. Adding a label to software is not proof that recorded measurements have been collected.
Verification: Lead checks actual placement timestamps, identities and reported sensor condition.
Why this belongs in the analysis: Time history must refer to the real casting event and the identified sensor.
5. Collect data and identify limitations
Hazard: Missing downloads, stale timestamps or selectively omitted readings can make an incomplete history look like valid current strength evidence.
Control: Collect stored data through the selected matching reader method from the planned protected positions. Check identities, updated timestamps, continuity and required sensor coverage before interpreting a report. Maintain access and curing restrictions and transfer monitoring ownership across shifts. Report missing or abnormal history to the responsible reviewer; never replace observations with assumed values, conceal a failed sensor or enter an unsafe area to obtain a reading.
Verification: Assigned checker records collection status, actual data gaps and reviewer notifications.
Why this belongs in the analysis: A current display needs a verified history and visible limitations to support responsible interpretation.
6. Report evidence while preserving release holds
Hazard: A graph or alert can be mistaken for permission to strip forms, remove support or load concrete without the required engineering determination.
Control: Prepare traceable reports linking the real placement, sensor locations, complete history and accepted calibration inputs. Send required corroborating findings and unresolved limitations to the designated authority. Keep the separate construction action held until its actual release is obtained. Protect remaining leads and monitoring ownership through the accepted handover; do not drill or chip out embedded equipment through this analysis.
Verification: Receiving reviewer confirms report basis, limitations and the continuing construction-release hold.
Why this belongs in the analysis: Monitoring supplies evidence for a decision rather than making the structural decision itself.
Compare control wording
| Needs improvement | More useful for this scenario |
|---|---|
| The sensor shows warm concrete; it must be strong enough. | Use the accepted mix-specific maturity relationship, traceable history and required verification, then obtain the separate construction-release decision. |
| The sensor label is in the app, so monitoring is complete. | Verify the identified device's actual collected data, casting timestamp, continuity and report limitations. |
Common questions
Can this example be adapted to a JSA?
Use its Task | Hazard | Control analysis in the employer's actual JSA format. Confirm the scenario, assigned verification and real findings before relying on the adapted work plan.
What changes when the project requires an AHA?
Apply the governing AHA format, risk method, supporting records and acceptance process. The published formwork AHA illustrates additional structure; this JHA supplies no completed AHA rating or acceptance.
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
- COMMAND Center System User Guide v4.3: field installation, sensor identity and collected data
- COMMAND Center maturity implementation: mix-specific calibration and verification
- COMMAND Center guidance documents: governing maturity-method requirements
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. This example supplies no inspection findings or work authorization. Use actual equipment instructions and site requirements alongside these references. Reference review: October 13, 2026.
Developed by Todd Jerome Jenkins, MS, CSP · Edition v1.0 · October 13, 2026
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