JHA / JSA / AHA builderRig Mounted Concrete Core Drilling 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 Rig Mounted Concrete Core Drilling 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 hole and receiving face
Possible hazards: The bit can strike a service or damage a structural element; the core can emerge into another work area.
Planned controls: Foreperson obtains the structural and service release, marks the permitted location and depth, and controls both faces. Unresolved reinforcement or services keep drilling on hold.
Check before work: Operator compares the markings with the current release and confirms access to the receiving face.
022. Arrange water and electrical supply
Possible hazards: Water can contact electrical equipment, spread slurry or obstruct an exit.
Planned controls: Use a supply and protective electrical arrangement suitable for the wet equipment and site requirements. Route hoses and cords away from access and contain discharge before drilling.
Check before work: Designated competent person checks the supply arrangement; crew checks the collection route and exit.
033. Install and inspect the drill stand
Possible hazards: An inadequately secured stand or incompatible bit can move violently or eject parts.
Planned controls: Install the stand using the actual anchorage method and manufacturer criteria for the released substrate. Inspect bit, drive, guard and controls. Do not substitute a vacuum mount for the planned anchor arrangement.
Check before work: Operator verifies stand installation and equipment checks against the unit’s instructions before loading the feed.
044. Drill within the released limits
Possible hazards: Contact with rotating parts, unexpected binding, noise and silica exposure can injure the crew.
Planned controls: Operate from the designated position with guards intact and the approved wet dust-control method functioning. Keep hands clear, maintain the two-face boundary and stop for binding, lost water or unexpected material.
Check before work: Operator checks water delivery before feed and monitors the rig; silica competent person checks the employer’s applicable control plan.
055. Restrain and remove the core
Possible hazards: A released concrete cylinder can fall, crush hands or overload the removal method.
Planned controls: Use the planned core restraint and removal equipment before breakthrough. Stop the drill and secure energy before handling the core; keep people out of the receiving and drop area.
Check before work: Foreperson confirms restraint and receiving-face clearance before final breakthrough.
066. Protect the opening and clean up
Possible hazards: An open penetration, wet slurry or dried dust can expose the next crew.
Planned controls: Secure the required opening protection, collect slurry while wet and follow site disposal arrangements. Use an appropriate wet or HEPA cleanup method and hand over the penetration status.
Check before work: Foreperson confirms protection and cleanup at both faces before releasing the area.
Example scope and starting conditions
A two-person crew will make a released horizontal core through an existing ground-floor concrete wall using an anchored electric drill stand and wet drilling system. Both faces of the wall can be controlled. This fictional learning example records planned controls; it supplies no actual inspections or work authorization.
- A structural and service investigation must release the hole, depth, anchorage and core removal method.
- No post tensioned or prestressed concrete, overhead drilling, unknown coating, occupied receiving face or elevated access is included.
- This replaces neither a structural alteration design nor an electrical isolation procedure.
Know when to pause
- Service or structural release is unclear or unexpected material is encountered.
- Stand moves, water fails, electrical protection trips or the bit binds.
- Receiving-face protection or core restraint cannot be maintained.
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.
Worked exampleNeed help? Ask Jenkins
Jenkins · Your Safety Concierge
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Jenkins matches your words to published starting points. Keep names and private job details in your working draft. Suitable free resources come first.
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
- What evidence releases the hole and stand anchors?
- How will the core be restrained and both wall faces protected?
- Which wet drilling, electrical and silica-control arrangements fit this rig?
Training and qualifications to confirm
- Rig setup, safe feed, isolation and core handling for the actual unit.
- Silica-control instruction under the employer’s applicable exposure plan.
Confirm the actual training evidence for the assigned people. A toolbox talk does not establish competence.
Decisions that change the plan
Which silica pathway applies to this wet core rig?
Table 1 row vi addresses rig-mounted core saws and drills with integrated water at the cutting surface and proper operation and maintenance. With that method fully and properly implemented, the row does not require a respirator for the silica task. If it is not implemented, use the applicable alternative exposure-control pathway. Other hazards can still require respiratory protection.
What must be recorded before this example is used on a job?
Replace the scenario with the actual work, identify additional hazards with the crew, and record the applicable instructions, responsible people, inspection findings, unresolved actions and required authorization. A planned verification is not an inspection result.
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.
Silica: Verify Dust Controls Before Cutting →Electrical & Extension-Cord Checks →Powered Tools: Check the Tool, Guard and Accessory →
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 hole and receiving face
Hazard: The bit can strike a service or damage a structural element; the core can emerge into another work area.
Control: Foreperson obtains the structural and service release, marks the permitted location and depth, and controls both faces. Unresolved reinforcement or services keep drilling on hold.
Verification: Operator compares the markings with the current release and confirms access to the receiving face.
Why this belongs in the analysis: A surface mark cannot establish hidden conditions.
2. Arrange water and electrical supply
Hazard: Water can contact electrical equipment, spread slurry or obstruct an exit.
Control: Use a supply and protective electrical arrangement suitable for the wet equipment and site requirements. Route hoses and cords away from access and contain discharge before drilling.
Verification: Designated competent person checks the supply arrangement; crew checks the collection route and exit.
Why this belongs in the analysis: The wet method creates an electrical and housekeeping interface.
3. Install and inspect the drill stand
Hazard: An inadequately secured stand or incompatible bit can move violently or eject parts.
Control: Install the stand using the actual anchorage method and manufacturer criteria for the released substrate. Inspect bit, drive, guard and controls. Do not substitute a vacuum mount for the planned anchor arrangement.
Verification: Operator verifies stand installation and equipment checks against the unit’s instructions before loading the feed.
Why this belongs in the analysis: Stand attachment must resist the actual drilling forces.
4. Drill within the released limits
Hazard: Contact with rotating parts, unexpected binding, noise and silica exposure can injure the crew.
Control: Operate from the designated position with guards intact and the approved wet dust-control method functioning. Keep hands clear, maintain the two-face boundary and stop for binding, lost water or unexpected material.
Verification: Operator checks water delivery before feed and monitors the rig; silica competent person checks the employer’s applicable control plan.
Why this belongs in the analysis: The tool and wet-control method must remain matched throughout the cut.
5. Restrain and remove the core
Hazard: A released concrete cylinder can fall, crush hands or overload the removal method.
Control: Use the planned core restraint and removal equipment before breakthrough. Stop the drill and secure energy before handling the core; keep people out of the receiving and drop area.
Verification: Foreperson confirms restraint and receiving-face clearance before final breakthrough.
Why this belongs in the analysis: Breakthrough is a separate task with a falling-object exposure.
6. Protect the opening and clean up
Hazard: An open penetration, wet slurry or dried dust can expose the next crew.
Control: Secure the required opening protection, collect slurry while wet and follow site disposal arrangements. Use an appropriate wet or HEPA cleanup method and hand over the penetration status.
Verification: Foreperson confirms protection and cleanup at both faces before releasing the area.
Why this belongs in the analysis: The receiving face needs the same closeout attention as the operator’s side.
Compare control wording
| Needs improvement | More useful for this scenario |
|---|---|
| Be careful around the equipment. | Install the stand using the actual anchorage method and manufacturer criteria for the released substrate. Inspect bit, drive, guard and controls. Do not substitute a vacuum mount for the planned anchor arrangement. |
| Check the area before starting. | Foreperson obtains the structural and service release, marks the permitted location and depth, and controls both faces. Unresolved reinforcement or services keep drilling on hold. |
Common questions
Can this be used as a JSA?
Use the Task | Hazard | Control structure if it meets the employer’s format. Adapt the boundaries, controls, verification and records to the actual job.
Does this provide a completed USACE AHA?
No. Use the project’s required AHA process, risk method, supporting fields and acceptance requirements. The existing formwork AHA explains the additional structure.
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 1926.300 Hand and power tools
- OSHA 1926.1153 Respirable crystalline silica
- OSHA 1926.21 Safety training and education
Original worked example developed for the stated scenario. Primary references support the planning framework; the actual equipment manual, product instructions and project design must supply applicable operating and acceptance 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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