Reinforcing Bar Placement & Tying SWMS

Reinforcing bar placement and tying is a foundational steel-fixing activity on virtually every in-situ concrete project, from residential slabs to high-rise core walls and infrastructure pours. The work involves manually positioning horizontal and vertical starter bars, laying mesh sheets, installing bar chairs, and rigging bundled reo with spreader bars — exposing workers to impalement, crush, manual-handling, and laceration risks across the full shift. Under WHS Regulation 2025, this scope is classified as High Risk Construction Work (HRCW) because it routinely involves a risk of a person falling onto exposed projecting reinforcement and because bundle lifts engage powered mobile plant near workers. A Safe Work Method Statement is therefore mandatory before work commences, must be developed in consultation with the workers carrying out the task, and must be reviewed whenever the control measures, sequence, or site conditions change. This SWMS documents the hazards, hierarchy-controlled measures, sign-on register, and supervisor verification process required to lawfully place and tie reinforcement on Australian construction sites.

Hazards identified

7 hazards covered, sorted by priority.

Control measures

Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.

1. 1Elimination — Where design permits, substitute in-situ tied reinforcement with prefabricated reo cages delivered to site, eliminating manual placement and tying at height entirely.
2. 2Elimination — Sequence concrete pours so vertical starter bars are encased within 48 hours, removing prolonged impalement exposure on the working deck.
3. 3Substitution — Replace hand-tied connections with proprietary mechanical couplers or pre-welded mesh modules to reduce repetitive wrist motion and tie-wire laceration exposure.
4. 4Substitution — Use plastic-tipped or mushroom-capped reo safety caps rated to AS/NZS 4671 impact criteria in place of bent-over bar ends.
5. 5Engineering — Fit certified impalement protection caps or timber capping rails on every vertical starter bar exceeding 200 mm projection before workers access the area.
6. 6Engineering — Use certified spreader bars and tagged lifting chains for all bundle lifts, with exclusion zones marked by hard barricades and spotter communication via two-way radio.
7. 7Administrative — Rotate steel fixers between tying, cutting and placing tasks every 90 minutes and schedule reo handling outside peak heat hours per Manual Tasks CoP 2011.
8. 8Administrative — Conduct documented pre-start briefings against this SWMS, verify HRCW sign-on register, and re-brief whenever bar diameter, lift weight or weather conditions change materially.
9. 9PPE — Issue cut-level D gloves, long-sleeve hi-vis, steel-midsole boots to AS/NZS 2210.3, medium-impact safety glasses to AS/NZS 1337.1, and hard hat to AS/NZS 1801.
10. 10PPE — Provide tool lanyards for nippers and tying tools when working above 2 m, and supply electrolyte hydration and cooling vests when WBGT exceeds site heat-stress threshold.

Applicable Codes of Practice

High-Risk Construction Work triggered

Worked example

On a six-level residential build, the steel-fixing leading hand opens this SWMS at the 6:45 am pre-start under the site shed awning with a crew of four fixers and the crane dogger. Today's task is placing and tying the Level 3 suspended slab over previously poured columns with 600 mm vertical starter bars projecting through the formwork. Working through the hazard register, the crew flags two live exposures: impalement on the uncapped column starters and a forecast 34°C afternoon. Controls selected from the document include immediate installation of mushroom safety caps on every starter before deck access, a rotation roster swapping tying and placing duties every 90 minutes, and rescheduling the heaviest bundle lift to 9 am before deck temperature peaks. Each worker signs the HRCW sign-on register acknowledging they have read the SWMS, understand the spreader-bar exclusion zone, and have been issued cut-D gloves and impact eyewear. At 11 am the dogger identifies that incoming N20 bundles weigh 180 kg more than planned; the leading hand pauses work, annotates the SWMS change log, re-briefs the crew on the revised exclusion radius, and obtains fresh sign-on before lifts resume — demonstrating the document functioning as a live control, not a filing-cabinet artefact.

Related legislation

• WHS Act 2011 (model)
• WHS Regulation 2025
• AS 3600 — Concrete structures; Hazardous Manual Tasks CoP

Frequently asked questions