First, describe the work and worksite
A glazing crew will install one factory-drilled monolithic tempered pane in a vertical glass wall using the project’s engineered CRL Heavy-Duty spider supports and specified HSF14 cap-mount attachments. Support construction is already released; the pane remains on rated handling support during connection completion. This fictional learning example describes planned controls and records no actual inspection or authorization.
- Released project drawings define glass, holes, fittings, independent bearing, movement and connection acceptance. CRL instructions 11M0320_2023 support component selection; catalog geometry does not establish the project’s design or authorize field substitutions.
- The accepted support assembly, protected ground-level working positions, rated handling method and receiving sequence are ready. Each panel and attachment is identified; factory holes, edges and supplied interfaces are checked before the pane moves.
- Large-panel installation 238150-16 is a partial connection. The cycle excludes support-frame or fin erection, field glass drilling or cutting, guardrails, balustrades, overhead glazing, structural silicone and elevated-access setup.
Questions before work
- Which drawing and attachment schedule govern this pane, and who resolves a hole, support or component mismatch?
- How will handling support remain effective while crew members make the point connections from protected positions?
- Who checks bearing, glass-to-metal interfaces and completed retention before authorizing handling release?
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. Confirm the released support and connection basis
Hazard: An unaccepted support, wrong attachment family or missing movement detail can place load through an unintended glass hole or incomplete structural connection.
Control: Lead compares the pane schedule, support release and specified CRL spider and HSF14 details with the assembly. Confirm bearing, restraint, movement and tightening criteria with the technical authority. Hold missing information or unresolved alignment; a manufacturer illustration does not establish the project’s adequate structural support.
Verification: Lead verifies the released design, actual support identity and acceptance route.
Why this belongs in the analysis: The design determines how this pane transfers and accommodates load.
2. Identify and inspect the glass and interfaces
Hazard: A chipped hole, wrong factory preparation or missing flexible interface can concentrate load or leave metal bearing directly against the pane.
Control: Crew checks the identified monolithic tempered pane’s factory holes, dimensions, edges and condition against approved documents. Match attachment parts and supplied gaskets. Separate damaged or unidentified items for disposition. Do not drill, grind or enlarge tempered glass to fit, or substitute packing without approved direction.
Verification: Assigned checker confirms panel identity, intact preparation and correct component set.
Why this belongs in the analysis: Hidden substitutions can defeat the intended point-support interface.
3. Establish handling support and protected fitting access
Hazard: Uncontrolled glass movement, an inaccessible fitting or premature rack release can place hands and bodies between the pane, attachment and structure.
Control: Handling lead establishes the accepted rated support before rack restraint changes. Set boundaries and agree communication with the fitting crew. Confirm protected connection access outside potential fall and crush paths. Keep remaining stock restrained and maintain the planned protected recovery position throughout pane movement.
Verification: Handling lead confirms support readiness, access and the agreed restraint transition.
Why this belongs in the analysis: Connection work requires stable support independent of workers’ hands.
4. Align and assemble the specified point attachments
Hazard: Forcing holes into alignment, trapping a gasket or applying premature final tightening can damage the pane or restrict the designed movement.
Control: Maintain handling support while aligning without glass levering or using fasteners to draw a mismatch closed. Assemble cap-mount interfaces in prescribed order with required flexible glass-to-metal separation. Follow project and fitting instructions for orientation and tightening. Stop for resistance, missing parts or unapproved contact.
Verification: Assigned checker verifies alignment, interface completeness and prescribed assembly sequence.
Why this belongs in the analysis: Correct interfaces prevent connection forces from bypassing the design.
5. Verify bearing and retention before release
Hazard: Removing the lifter while a point connection remains incomplete can drop or rotate the pane and overload an adjacent fitting.
Control: Receiving lead checks identified connections against the released schedule, including bearing, retention, movement and tightening evidence. Maintain handling support until actual independent-support release criteria are satisfied. Communicate release explicitly to the operator and clear the detachment path; temporary alignment and engaged threads are insufficient.
Verification: Receiving lead verifies all prescribed release conditions before support is withdrawn.
Why this belongs in the analysis: Every required load path must exist when handling assistance ends.
6. Protect the installed panel and hand over open work
Hazard: An apparently finished glass wall can be struck, used as a guard or altered before remaining connections and interface work are resolved.
Control: Maintain boundaries while handling equipment clears; secure tools and hardware. Record pane and fitting identities, actual checks, technical dispositions and remaining joint or neighboring-panel work. Transfer restrictions, including impact protection and incomplete system acceptance. Keep the assembly out of unintended use until its governing release.
Verification: Lead checks documented panel state, protection and receiving-team responsibilities.
Why this belongs in the analysis: Panel retention does not by itself complete the whole glass wall.
What does a useful control look like?
| Needs improvement | More useful for this scenario |
|---|---|
| Pull the holes into place with the bolt. | Crew holds the supported pane for technical disposition when factory preparation and accepted fitting positions do not align. |
| The spider holds it, so release the lifter. | Receiving lead checks the complete specified bearing and retention assembly and communicates release before handling support is removed. |
Decisions that change the analysis
Can a matching-looking fitting or washer replace the specified part?
Only after the responsible technical authority accepts that actual substitution under the project and manufacturer requirements. Rigid, swivel, cap and flush configurations are not interchangeable by appearance. Keep the pane supported or return it to the planned safe position while the mismatch is resolved; the learning example supplies no approval of substitute hardware.
What must the crew record for actual use?
Record drawing and instruction revisions, support release, pane identification and factory preparation, fitting and interface parts, rated handling arrangement and protected access. Identify required bearing, movement and tightening checks, their actual results, technical dispositions and explicit release communication. Transfer unfinished system work and restrictions rather than copying a favorable connection record.
Agree when the crew will pause
- Glass identification, hole condition, support alignment or an attachment differs from the released drawings and parts schedule.
- A gasket, bearing detail, tightening criterion, movement provision or required release check is missing or unclear.
- Handling support, protected fitting access or the communication needed for independent-support transfer is lost.
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
- Instruction on the actual engineered CRL spider assembly, factory-glass identity, cap-mount interfaces, connection sequence and project verification criteria.
- Task instruction on rated glass handling, crush and cut boundaries, protected fitting access, defect recognition and the agreed independent-support release communication.
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 analysis to the employer’s JSA and actual work. Confirm assigned checks and record real findings before use.
What changes if the project requires an AHA?
Use the governing project format, risk method and acceptance process. The published formwork AHA illustrates additional structure; this example supplies no project risk 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
- CRL Spider Fittings Installation Instructions, 11M0320_2023
- CRL Structural Glass Curtainwall Hardware design overview
- OSHA 1926.21 Safety training and education
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 12, 2026.