Appearing below are the current confined space training standards listed in the OSHA 1926 construction standards. Refer to the OSHA website to check for updated information that may have been added since this was posted.
1926.21(b)(6)(i) - All employees required to enter into confined or enclosed spaces shall be instructed as to the nature of the hazards involved, the necessary precautions to be taken, and in the use of protective and emergency equipment required. The employer shall comply with any specific regulations that apply to work in dangerous or potentially dangerous areas.
1926.21(b)(6)(ii) - For purposes of paragraph (b)(6)(i) of this section, "confined or enclosed space" means any space having a limited means of egress, which is subject to the accumulation of toxic or flammable contaminants or has an oxygen deficient atmosphere. Confined or enclosed spaces include, but are not limited to, storage tanks, process vessels, bins, boilers, ventilation or exhaust ducts, sewers, underground utility vaults, tunnels, pipelines, and open top spaces more than 4 feet in depth such as pits, tubs, vaults, and vessels.
Bear in mind that other OSHA standards, such as but not limited to, electrical, lockout tagout, respiratory protection, hazardous substances, haz-com, and PPE, could apply to your confined space entry operations. Refer to the OSHA standards to determine all related standards that apply to your work.