RF Radiation Safety — poster
Radio-frequency energy from antennas cooks tissue from the inside — you can absorb a harmful dose without feeling anything until it's done. On towers and rooftops, live antennas often sit exactly where you need to put your hands.
Sites transmit even when they look idle, and carriers don't call before they power up. Verify lockout/power-down through the carrier's NOC before working in front of antennas — a phone call is not confirmation someone flipped a switch.
Blue INFO, yellow CAUTION, red WARNING signs mark increasing RF zones. If your work path crosses a marked zone, you need authorization and possibly a power-down.
RF intensity drops fast with distance. Never work directly in front of a transmitting panel or dish. Even a few feet off-axis dramatically cuts exposure.
On telecom structures, a calibrated RF monitor on your body warns you before you're overexposed. If it alarms — move away first, investigate second. Report suspected overexposure the same day.
Full certification online: RF Hazard Communication — scan the QR.
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