# Federal Register
1 - 80:25365-25526 - Confined Spaces in Construction; Final Rule - PDF
2 - 48:45881 - Welding
# Regulations
1 - 1926.351 - Arc welding and cutting.
# Standard Interpretations
1 - 1926.351 - Interpretation of "unattended" in 29 CFR 1926.351(d)(1) with regard to electrode holders.
2 - 1926.351 - Use of portable arc welding machines in inclement weather.
3 - 1926.351 - Frame grounding of arc welding machines.
4 - 1926.351 - Propane pre-heaters used to pre-heat steel in field construction.