{"schemaVersion":"1.0","exportedAt":"2026-05-15T12:40:04.092Z","occupation":{"soc":"47-5051.00","title":"Rock Splitters, Quarry","group":"Construction & Extraction","sector":"21","jobZone":2,"jobZoneInferred":false},"framework":{"version":"v.26.05","description":"","contextCovered":"This framework covers rock splitting and quarry extraction work performed at active quarry sites, spanning hand-tool operation, grain line analysis, safety compliance, and crew leadership across a Job Zone 2 vocational preparation context.","levels":{"emerging":{"label":"Emerging","statements":["Grain line patterns in quarry stone — recognize basic orientations under direct supervisor guidance at an active quarry face.","Hand tools including sledgehammers and wedges — handle and carry safely following established site protocols on a quarry work site.","Stone dimensions and cut outlines — mark on rock surfaces using rules and chalk lines under close foreman direction.","Wedges and feathers — insert into pre-drilled holes following step-by-step instruction from an experienced splitter.","Jackhammer operation — perform basic startup and shutdown procedures under direct supervision in a quarry extraction setting.","Personal protective equipment including hard hat, eye protection, and steel-toed boots — don and inspect daily before entering the quarry work zone.","Verbal safety instructions from crew leads — listen and respond accurately to maintain safe positioning near active splitting operations.","Rock fragments and debris — clear from work area using appropriate hand tools following cleanup protocols on the quarry floor.","Basic stone splitting sequence — follow step-by-step checklist guidance when assisting with wedge-and-feather splits on small stone masses.","Tool condition and obvious defects — identify and report to a supervisor before beginning quarry splitting tasks each shift."]},"developing":{"label":"Developing","statements":["Grain line patterns in medium-sized stone blocks — locate and interpret independently to select appropriate splitting orientation on a routine quarry assignment.","Wedges and sledgehammers — drive with controlled, repetitive force to split stone sections cleanly from larger rock masses with minimal rework.","Chalk lines and measurement rules — apply accurately to mark multiple stone dimensions before cutting across a standard production run.","Jackhammer and pneumatic tools — operate at sustained production pace while monitoring for irregular tool vibration or pressure loss during a shift.","Feather-and-wedge sets — assemble and sequence correctly across a row of boreholes to achieve controlled, straight stone splits.","Equipment performance during operation — monitor gauges and mechanical cues to detect early signs of malfunction and adjust before output is affected.","Quarry safety protocols — apply consistently when working semi-independently near active blast zones and heavy equipment movement.","Stone pieces of varying weight — remove from extraction sites using appropriate manual techniques and light mechanical assists to meet daily tonnage targets.","Splitting tool selection — match wedge type and size to rock hardness and grain characteristics encountered across familiar quarry formations.","Crew instructions and production briefings — interpret and act on with accuracy, adjusting work pace to meet shift output requirements."]},"proficient":{"label":"Proficient","statements":["Complex grain line patterns in large, irregularly shaped stone masses — analyze and use to determine optimal splitting strategy without supervisor input at a commercial quarry.","Full splitting cycle using jackhammers, wedges, feathers, and sledgehammers — execute autonomously to separate precisely dimensioned stone sections from intact rock faces.","Non-standard stone outlines and irregular cuts — mark and execute using adjusted measurement techniques when standard templates do not apply.","Unexpected fracture risks and hidden fissures — identify by reading surface features and tapping patterns before committing to a splitting line.","Tool wear and mechanical degradation across a full equipment set — assess systematically during operations and coordinate timely replacement to maintain production flow.","Multi-hole wedge-and-feather layouts on large stone blocks — plan and drive in correct sequence to achieve clean splits with minimal material waste.","Quarry safety hazards including unstable overburden and ricochet debris — evaluate and mitigate proactively across changing extraction conditions.","Production output quality — inspect finished stone dimensions and split faces against specification tolerances before material leaves the extraction zone.","Splitting techniques for variable rock types including granite, limestone, and sandstone — adapt method selection based on hardness, bedding, and moisture content.","Newer crew members performing splitting tasks — observe, correct technique errors, and provide task-specific feedback during live quarry operations."]},"advanced":{"label":"Advanced","statements":["Site-wide splitting production standards and daily output targets — establish and communicate to full quarry crews to align extraction activity with operational goals.","Grain analysis and splitting methodology for novel or difficult stone formations — develop and document as repeatable procedures for adoption across the quarry workforce.","Crew skill gaps and individual development needs — assess through direct observation and structured review, assigning targeted on-the-job training to accelerate competency growth.","Quarry safety and extraction protocols — revise and update based on incident data, equipment changes, and regulatory requirements to maintain site-wide compliance.","Stone yield efficiency across extraction zones — analyze production records and tool usage patterns to identify and implement process improvements that reduce material waste.","Cross-functional coordination between drilling, blasting, and splitting crews — lead to ensure proper sequencing and reduce downtime across the full extraction cycle.","New equipment and tool systems for splitting operations — evaluate against production requirements and recommend adoption or rejection with supporting operational rationale.","Apprentice and entry-level rock splitters — design onboarding sequences that build foundational grain-reading, marking, and tool-driving skills within the first weeks of employment.","Production scheduling and resource allocation for quarry splitting operations — oversee to meet contracted stone delivery timelines while controlling labor and equipment costs.","Organizational knowledge of quarry splitting craft including historical techniques and emerging methods — preserve and transfer systematically to sustain institutional capability over time."]}}},"sources":{"onet":"v30.2 (CC BY 4.0)","crosswalk":"https://skillscrosswalk.com","generator":"LER.me"},"attribution":"© EBSCOed"}