An official website of the United States government

Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

1910 Northern Rockies Fires

2 In 2 Out

2-In 2-Out

Search our library’s catalog with this term

Section (g)(4) of OSHA's Respiratory Protection Standard, 29 CFR 1910.134, which requires that for safety, 2 persons entering a dangerous atmosphere must remain in constant contact with one another, and 2 persons must remain outside the danger in order to monitor those inside and perform rescue or call for backup if needed.

Used for:

  • Two In Two Out
  • 2-In 2-Out
  • Two-In Two-Out

Related:

Broad Terms:

Search again