Confined Spaces in Construction: New OSHA Subpart AA
This standard became effective on August 3, 2015.
Compliance Guide: Protecting Construction Workers in Confined Spaces: Small Entity Compliance Guide (PDF*).
Temporary Enforcement Policy: Temporary Enforcement Policy for Residential Construction Work in Confined Spaces. OSHA Memo, (October 1, 2015).
Compliance assistance materials and the full text: https://www.osha.gov/confinedspaces/