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What RF safety signs should I install on my site?

PCIA Tech Council: RF Signage Standards

Per FCC, OSHA, PCIA and other groups the RF Safety signs should be installed base on tested RF levels.

See the PCIA signage standards or RSI sign page at here

NOTICE

  • Sign Location: Point of access to the site or physical barrier to the site

  • Appropriate for: Addressing practices not related personal injury

    • Example: Areas with no trespassing where RF leaks or temporary RF level spikes may occur, but not exceeding the average limits

 

  • Color: Blue heading band containing white “NOTICE” text

  • Symbol: Radiating tower

  • Additional language (descending):

    • RADIO FREQUENCY ENVIRONMENT AREA

    • AUTHORIZED PERSONNEL ONLY BEYOND THIS POINT!

    • Personnel proceeding beyond this point must obey all posted signs, site guidelines, and Federal Regulations for working in radio frequency environments

    • In accordance with Federal Regulations on frequency emissions

 

  • Shape: vertical rectangle with rounded edges

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Notice
Caution

CAUTION

  • Sign Location: Areas where RF assessment has determined RF emissions exceed the FCC Uncontrolled/General Population exposure limit

    • ​Example: Base of a tower where personnel may find themselves in RF fields that exceed the FCC Uncontrolled/General Population limit, but are less than 100% of the Controlled Worker Standard under time-weighted average guidelines

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  • Appropriate for: Warning against potential hazards that could result in minor or moderate injury

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  • Color: Yellow heading band containing black “CAUTION” text

  • Symbols:

    • Yellow exclamation point in black triangle next to “CAUTION”

    • Radiating tower in yellow triangle with black outline

 

  • Additional language (descending):

    • BEYOND THIS POINT:

    • Radio frequency fields at this site may exceed FCC rules for human exposure

    • For your safety, obey all posted signs and site guidelines for working in radio frequency environments

    • In accordance with Federal Regulations on frequency emissions

 

  • Shape: vertical rectangle with rounded edges

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Warning

WARNING

  • Sign location: Posted in advance of areas that have been determined to have RF emission levels that exceed the Controlled/Occupational RF limit or borderline Controlled-Occupational/Above Controlled areas

    • Example: This would include those areas with high power broadcast or paging, or areas within a few feet of most other antennas.

 

  • Appropriate for: Indicating a potentially hazardous situation that, if not avoided, could result in serious injury or death.

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  • Color: Red heading band containing black “WARNING” text

  • Symbol:

    • Red exclamation point in black triangle next to “WARNING”

    • Radiating tower in red triangle with black outline

 

  • Additional language (descending)

    • BEYOND THIS POINT:

    • Radio frequency fields at this site may exceed FCC rules for human exposure

    • For your safety, obey all posted signs and site guidelines for working in radio frequency environments

    • In accordance with Federal Regulations on frequency emissions

 

  • Shape: vertical rectangle with rounded edges

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Miscellaneous Factors:

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  • Key sign word should be 2” in height visible at 25’

  • New ANSI standard emphasizes custom design

    • Suggests adding an action statement, consequences, a symbol, use mixed case, and in many situations add emergency information.

 

  • Caution signs without a safety alert symbol may be used to alert against unsafe practices that can result in property damage only

    • Warning and Danger signs should not be used for property damage hazards unless personal injury risk appropriate to this level is also involved

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