Section PSC 135.183 - Vaults: structural design requirements additions [49 CFR 192.183]After 49 CFR 192.183(c), insert:
(dw) In the design of vaults and pits for pressure limiting, pressure relieving and pressure regulating equipment, the installed equipment shall be protected from damage, such as that resulting from an explosion within the vault or pit, which may cause portions of the roof or cover to fall into the vault.(ew) Vault or pit openings shall be located so as to minimize the hazards of tools or other objects falling upon the regulator, piping, or other equipment. The control piping and the operating parts of the equipment installed shall not be located under a vault or pit opening where workers can step on them when entering or leaving the vault or pit, unless such parts are suitably protected. Whenever a vault or pit opening is to be located above equipment which could be damaged by a falling cover, a circular cover should be installed or other suitable precautions taken.Wis. Admin. Code Public Service Commission PSC 135.183
CR Register, October, 1999, No. 526, eff. 11-1-99.