Okla. Stat. tit. 40, § 40-179: Railroad repair tracks to be sheltered

It shall be unlawful for any railroad, corporation, or other

person, who owns, controls or operates any lines of railroad in the

state, to build, construct or repair railroad equipment without

first erecting and maintaining at every division point a building or

shed over the repair tracks; same to be provided with a floor where

such construction or repair is permanently done, so as to provide

that all men employed in the construction and repair of cars,

trucks, and other railroad equipment, shall be under shelter during

snows, sleet, rain, and other inclement weather.