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.

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, two persons entering a dangerous atmosphere must remain in constant contact with one another, and two persons must remain outside the danger in order to monitor those inside and perform rescue or call for backup if needed.

Used for:

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

Related:

Broad Terms:

Search again