First, describe the work and worksite
A masonry crew will build one new engineer-designed solid load-bearing building-wall section from approved pre-dressed irregular natural stone. The issued US project detail governs stone bedding, coordinated face/core construction, mortar, bonder stones and specified hearting or pinnings. Work uses released supports and access and ends with protected curing before any building-load release. This fictional learning example describes planned controls; it records no actual inspection or work authorization.
- The US project design and stone supplier identify the complete solid-wall cross section, permitted stone/mortar, natural bedding orientation, bonders, interior packing and construction-stage stability.
- Foundation and handed-over access are released, with a handling plan for the actual stone weights and shapes; oversized pieces require the separately accepted mechanical handling method.
- Both stone-masonry and structural-wall connections are partial. Retaining/landscape walls, veneer, cladding, rebuilding/demolition, arches, on-site powered stone cutting and field design are excluded.
Questions before work
- How does the issued detail connect the wall faces and core into the intended load-bearing cross section?
- Which stone orientation and packing details come from the actual supplier/designer rather than appearance?
- How will the crew avoid placing building loads on the wall before its cure and permanent-support acceptance?
Build the analysis one step at a time
What will the worker do? How could someone be harmed? What prevents or reduces that exposure? Who checks the control, and when?
1. Release the complete solid-wall section
Hazard: A face built as independent veneer or an unspecified core can fail to transfer the intended building loads.
Control: Lead reviews the issued solid-wall detail, designer’s acceptance criteria and supplier information. Identify the approved section, bedding, bonders, mortar, hearting/pinnings, junctions and construction stages. Confirm temporary stability and loading hold points. Refer incomplete bond or core details to the designer before starting.
Verification: Lead records the section identification and checks that face, core and connection requirements are explicit.
Why this belongs in the analysis: A visually convincing face does not demonstrate a structurally connected wall thickness.
2. Prepare support, access and stone handling
Hazard: Weak bearing, unstable access or irregular heavy pieces can cause collapse, crushing or overexertion.
Control: Verify released foundations and handed-over access for this wall section. Stage stones on stable supports, identify their weights/handling limits and keep fingers out of rolling and pinch paths. Mechanically assist pieces outside the accepted manual-handling method. Establish required wall restrictions and temporary support without overloading the foundation or access system.
Verification: Lead checks stone staging, handling arrangements, access release and the available stability controls.
Why this belongs in the analysis: An irregular shape can roll despite a manageable nominal stone weight.
3. Establish the base stones and bedding
Hazard: Wrong natural bedding or uneven support can concentrate forces and allow stones to rock.
Control: Select approved pre-dressed base stones and identify the supplier-specified bedding orientation. Place them in the issued mortar/support arrangement using the planned handling method. Check line, level, bearing and fit without balancing stones on loose wedges or inventing packing details. Hold unsuitable pieces for replacement or an accepted disposition; this task includes no on-site powered cutting.
Verification: Named checker verifies bedding orientation and stable base placement before the next construction stage.
Why this belongs in the analysis: Orientation and continuous intended support affect how each stone carries load.
4. Build faces and core in the designed progression
Hazard: Separately advanced faces, voided cores or missing bonders can leave disconnected unstable masonry.
Control: Build the faces and interior together in the issued course/lift sequence, installing each specified bonder stone and junction detail before it is hidden. Fill the designed hearting/pinning arrangement with the accepted materials and mortar method; do not treat miscellaneous dry rubble as an equivalent core. Maintain the permitted construction height and temporary restraint, stopping for movement or an unresolved fit.
Verification: Checker observes and records bonders and core packing at the specified concealed-work stages.
Why this belongs in the analysis: Continuity across the wall cannot be inspected from the completed outside face.
5. Verify the section and protect incomplete work
Hazard: Unseen defects or unapproved loading can compromise a wall before mortar and permanent support are accepted.
Control: Check alignment, section continuity, exposed joints and documented concealed details against actual project criteria. Correct defects only under an accepted method. Hold construction loads/overhead interfaces and maintain the current stage’s temporary support and weather protection. Control wet-mortar contact and dust during cleanup using the assessed exposure method.
Verification: Masonry lead records section checks, corrections and any hold on upper work or loading.
Why this belongs in the analysis: Neither stone weight nor a firm surface proves the new wall is ready for loads.
6. Protect curing and transfer acceptance holds
Hazard: Uncontrolled weather, later alteration or premature support removal can defeat the completed section.
Control: Maintain the specified cure/weather protection and inspect required temporary support from accepted safe access. Record materials, placement conditions, bond/core inspections and remaining interfaces. Hand over the section’s loading and support restrictions to the receiving supervisor. Obtain the actual designer/project acceptance before adding building loads; temporary-support removal is outside this operation.
Verification: Lead records the protected state and identifies who controls the next release and monitoring duties.
Why this belongs in the analysis: New solid masonry needs a documented handover as well as completed stonework.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Lay attractive stones on both faces and fill the middle later. | Follow the issued coordinated face/core sequence, installing specified bonders and accepted hearting/pinnings while concealed details remain inspectable. |
| The wall is heavy and looks stable, so start the floor. | Maintain construction-stage restraint and the loading hold until actual cure, section continuity, permanent-support interfaces and required project acceptance are recorded. |
Decisions that change the analysis
Is this merely a stone version of the CMU resource?
Its solid irregular cross section requires supplier-defined natural bedding, coordinated face/core progression and designed cross-wall bonding/packing. The existing CMU method uses standardized hollow units and cells; veneer and cladding carry a different load path. This example completes a new solid building-wall method, not a new facing material on an existing wall.
What must the crew record for actual use?
Record the work boundary, design/equipment documents, responsible people, acceptance criteria, control findings and unresolved actions. Communicate restrictions and obtain required project authorization. This learning example supplies no evidence that a control was installed or accepted.
Agree when the crew will pause
- The solid-wall design, supplier bedding information, material acceptance or temporary-stability requirements are missing or conflicting.
- A stone rolls or rocks, an unapproved core/bonder substitution is proposed, alignment changes or concealed details cannot be checked.
- Handling/access controls fail, weather exceeds the accepted protection method or upper work/loading would precede the required release.
After a pause, correct the condition, reassess the work, and obtain required authorization before restarting. Keep unresolved actions visible.
Download the worked example and free 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.
Your editable working copy
Build and download your draft
Start blank or load the learning example. Replace its assumptions with your actual conditions and involve the people doing the work. Your entries stay in this browser tab; download a copy before leaving or refreshing.
1. Describe your work and site
2. Work through each task
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.
3. 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.
Open the downloaded file in a browser, then use Print → Save as PDF for a printable copy.
Training needs to confirm
- Project-specific solid rubble construction covering bedding, coordinated face/core progression, bonders, mortar packing and inspection before details are hidden.
- Irregular-stone handling, temporary wall stability, handed-over access, cement/mortar exposure controls and reporting of unsuitable stones.
Confirm applicable qualifications, task instruction and actual training evidence for the people assigned. Related toolbox talks support toolbox talks; they do not establish competence.
Common questions
Can this example be used as a JSA?
Adapt the Task | Hazard | Control sequence to the employer’s JSA and actual worksite. Name the control checkers and record findings; this fictional example supplies no completed inspection or authorization.
What changes if the project requires an AHA?
Use the governing AHA format, risk method, records and acceptance process. The published formwork AHA illustrates that structure. Add actual competencies, inspections and project reviews; renaming a JHA does not complete those requirements.
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
- Scottish Government Natural stone masonry in modern Scottish construction guidance
- Historic Environment Scotland: rubble masonry and pinnings context
- OSHA 1926.706 Requirements for masonry construction
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 9, 2026.