- OSHA General Industry Standards: https://www.osha.gov/laws-regs/regulations/standardnumber/1910
- OSHA Construction Standards: https://www.osha.gov/laws-regs
- OSHA Letters of interpetation: https://www.osha.gov/laws-regs
- National Institute of Occupational Safety & Health: https://www.cdc.gov/niosh/index.htm
