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Section 19

Warning Signs and Labels

  1. Lighted Warning Signs
    Entrances to all laboratories where a Class 3b or Class 4 laser is present shall have a lighted warning sign that is activated when the laser is energized.
  2. Written Warning Signs
    The following warning signs are required to be posted at the entrances to laboratories where lasers are present:
    Laser Room Sign
    • All laboratories where a Class 2, Class 3R (formally 3a), Class 3b or Class 4 laser is present shall have a laser radiation label affixed to the room sign. Labels for Class 2 and Class 3R lasers shall be worded “Caution – Laser Radiation.” Labels for Class 3b and Class 4 lasers shall be worded “Danger – Laser Radiation.” Room signs may be requested by submitting the Room Sign Request Form on the EHRS website.
    • All laboratories where a Class 3b or Class 4 laser is present shall have a Danger sign on the door(s) to the laboratory that conforms to ANSI Z136.1-2007. Laboratories with a Class 3R laser that generates a beam with an irradiance or radiant exposure equal to or greater than the MPE shall also have a “Danger” sign affixed to the door(s).
      The Danger sign shall indicate the precautionary instructions or protective actions required, the type of laser or wavelength, the pulse duration (if applicable), the maximum output and the class of the laser or laser system. The sign shall use the symbols, color and layout shown in the example below.
      Laser warning signs may be requested by submitting the Laser Warning Sign Request Form on the EHRS website.
      Danger Laser Sign
    • All laboratories where a Class 2 or Class 3R laser is present shall have a Caution sign on the door(s) to the laboratory that conforms to ANSI Z136.1-2007. (Class 3R lasers that generate a beam with an irradiance or radiant exposure equal to or greater than the MPE shall have a “Danger” sign. See above.)
      The Caution sign shall indicate the precautionary instructions, the type of laser or wavelength and the class of the laser or laser system.
      Laser warning signs may be requested by submitting the Laser Warning Sign Request Form on the EHRS website.
      Caution Laser Sign
    • The outside boundary of a temporary laser controlled area shall be posted with a Notice sign that conforms to ANSI Z136.1-2007. The Notice sign shall indicate the reason for the temporary controls, the precautionary instructions or protective actions required, the type of laser or the wavelength, the pulse duration (if applicable), the maximum output and the class of the laser. The sign shall use the symbols, color and layout shown in the example below.
      Temporary laser controlled area warning signs may be requested by submitting the Laser Warning Sign Request Form on the EHRS website.
      Temporary Laser Sign
  3. Labels
    Lasers shall be properly labeled as follows:
    • All Class 2, Class 3R (formally 3a), Class 3b and Class 4 lasers and laser systems shall have a label conspicuously affixed to the housing that conforms with ANSI Z136.1-2007. The label shall indicate the precautionary instructions or protective actions required, the type of laser or the wavelength, the pulse duration (if applicable), maximum output and the class of the laser or laser system. The label shall incorporate the sunburst symbol.
      Manufacturers are required to label lasers in accordance with the Federal Laser Product Performance Standard (21CFR1040.10.) These labels satisfy this requirement.
      Contact EHRS for label specifications if the laser was not labeled by the manufacturer, or if it was modified or built in the laboratory.
      Laser Warning Label
    • All removable protective housings shall have a label affixed in a conspicuous location that conforms to ANSI Z136.1-2007. The label shall indicate the hazard of the enclosed laser. This label does not need to contain the sunburst symbol. Contact EHRS for label specifications.
      Laser Enclosed Label

table of contents Section 18 Appendix A