RF Safety & Power-Down Procedure SWMS
RF exposure management, transmitter power-down lockout, occupational vs general public limits. ARPANSA RPS S-1 + RPS 3 framework. Used in conjunction with antenna and tower work SWMS.
SWMS variants reference your state’s WHS legislation. Instant download after payment.
Radiofrequency (RF) safety and transmitter power-down procedures govern how telecommunications workers approach, isolate, and verify de-energisation of active broadcast and cellular antenna systems before climb, maintenance, or co-location work commences. This SWMS addresses the invisible occupational hazard of RF electromagnetic field exposure exceeding ARPANSA RPS S-1 occupational reference levels, which can cause thermal tissue injury, cataract formation, and cardiac interference in workers wearing implantable medical devices. Under WHS Regulation 2025, work on or near energised telecommunications structures is High-Risk Construction Work requiring a documented SWMS before work commences, with mandatory consultation under s47-49. The Radiocommunications Act 1992 (Cth) further imposes carrier licensing obligations on transmitter operators, including coordination of power-down windows with adjacent licensees. This SWMS is designed to be used in tandem with antenna rigging and tower climbing SWMS, providing the RF-specific isolation, lockout, verification, and re-energisation sequence that protects workers from non-ionising radiation overexposure.
Hazards identified
7 hazards covered, sorted by priority.
Thermal tissue burns, cataract formation, sustained core temperature elevation, and potential long-term neurological effects from cumulative overexposure
Acute RF burn injury, induced RF currents through body, falls from height triggered by startle response on tower
Continued RF exposure from adjacent licensee equipment causing overlimit exposure despite documented isolation of own transmitter
Device malfunction, inappropriate defibrillation discharge, bradycardia or asystole in affected worker requiring emergency medical response
Worker enters overlimit zone believing field strength is compliant, sustaining undetected overexposure exceeding daily limits
Network Operations Centre restores service remotely, energising antenna while workers remain in restricted zone exposed to full transmit power
Contractors, visitors, and general public enter occupational-limit zones without awareness, breaching ARPANSA general public reference levels
Control measures
Hierarchy-of-controls order: elimination → substitution → isolation → engineering → administrative → PPE.
- 1Elimination — Schedule maintenance during planned outage windows where transmitter is fully decommissioned and DC-isolated, eliminating RF exposure entirely from the work envelope
- 2Elimination — Use remote tilt, remote diagnostics, and drone-based antenna inspection to remove the need for worker entry into the near-field zone wherever technically feasible
- 3Substitution — Where full power-down is not possible, negotiate carrier power reduction to below 10 percent ERP for the work window, reducing field strength below occupational reference levels
- 4Engineering — Install hardwired transmitter interlock keyed to tower access gate, preventing physical climb until RF output is verified at zero via independent power meter feedback
- 5Engineering — Deploy calibrated personal RF monitors (Narda RadMan or equivalent) on every worker entering the zone, set to alarm at 50 percent of ARPANSA occupational limit
- 6Administrative — Issue carrier-coordinated power-down permit listing every co-located licensee, lockout point, NOC contact, and re-energisation authority before any climb commences
- 7Administrative — Conduct pre-start RF brief using this SWMS, confirming implantable medical device declarations, monitor function tests, and emergency power-down communications
- 8Administrative — Apply lockout-tagout on transmitter mains, remote management interface, and NOC dispatch system with unique keyed padlock retained by climbing supervisor throughout works
- 9PPE — Issue RF-protective garments (Naptex or equivalent shielded coveralls) rated for the relevant frequency band when residual field strength exceeds 50 percent of occupational limit
- 10PPE — Provide hard hat, safety glasses, and high-visibility shielded gloves as baseline PPE supplementing primary RF engineering and administrative controls
Applicable Codes of Practice
Establishes mandatory occupational and general public reference levels for whole-body and localised RF exposure that this SWMS enforces through monitoring and exclusion zones
Mandates documented SWMS for telecommunications tower work involving risk of fall over 2m and proximity to energised installations, requiring worker consultation and review
Specifies signage, restricted zone delineation, and warning notation around RF sources required at every tower base and antenna access point
Imposes statutory duty on transmitter licensees to coordinate power-down with adjacent carriers and maintain electromagnetic energy management plans accessible to contractors
High-Risk Construction Work triggered
Telecommunications towers routinely exceed 15 metres and RF safety work is performed at antenna height, well above the 2 metre fall threshold
This SWMS is specifically authored for RF management on operational telecommunications towers, directly engaging the Schedule 1 trigger without qualification
Active RF transmitters and associated mains supply, rectifiers, and battery banks constitute energised electrical installations requiring isolation and verification
PCBU must consult workers, document controls, and retain SWMS for two years post-incident or duration of work; penalties for failure are substantial and indexed, with current maximum following the prevailing WHS schedule
Who this is for
- →Telecommunications riggers on carrier and broadcast sites
- →RF safety officers managing co-located carrier sites
- →Tower maintenance contractors performing antenna swaps
- →Network operations supervisors authorising power-down windows
What you receive
- ✓Editable DOCX template — Microsoft Word compatible
- ✓State-specific WHS legislation schedule (NSW/VIC/QLD/SA/WA/TAS/NT/ACT)
- ✓Hazard register with risk ratings + hierarchy-of-control mapping
- ✓Worker sign-on register, pre-start checklist, and incident escalation flow
Worked example
A two-person rigging crew is mobilised to a regional rooftop monopole hosting three carrier antennas and one digital broadcast panel for a quarterly inspection and antenna re-tilt. At the pre-start brief in the equipment compound, the climbing supervisor opens this SWMS on a ruggedised tablet and works through the RF hazard register with the crew. The lead climber declares no implantable medical devices; both workers confirm their Narda personal RF monitors have been bump-tested and show valid calibration stickers. Using the controls section, the supervisor reviews the carrier-coordinated power-down permit confirming all three cellular carriers have throttled to 10 percent ERP and the broadcast transmitter is fully off-air for the agreed two-hour window, with NOC dispatch locked out and a keyed padlock applied to the remote management interface. The crew signs on to the SWMS acknowledging the residual RF risk from the throttled carrier antennas and the requirement to evacuate the climb on any monitor alarm. Mid-task, a monitor on the lead climber alarms at 55 percent of occupational limit near the upper carrier antenna. Following the SWMS escalation step, the climber descends one metre, the supervisor radios NOC to confirm transmit power, and a further reduction is negotiated before work resumes. The SWMS is annotated with the field event and re-signed before the second antenna is approached.
Related legislation
- WHS Act 2011 (model)
- WHS Regulation 2025
- AS/NZS 3000 — Electrical installations