34 Pa. Code § 47.151
The following words and terms, when used in this subchapter, have the following meanings, unless the context clearly indicates otherwise:
Basement-A story partly, but not more than 1/2 below the level of the ground surrounding the building and shall be considered the first story of such building.
Brass foundry-A place where brass, aluminum, copper, tin, zinc, gold, silver, or composition metals containing any of the foregoing metals are melted or poured into molds in the making of castings, except that foundries where only aluminum is melted shall be covered by regulations governing iron and steel foundries.
Cellar-A story more than 1/2 below the level of the ground surrounding the building.
Entrance-A main doorway opening directly to the outer air.
Gangway-A well-defined passageway dividing the working floor of the foundry but not the spaces between molds. Spaces between molds shall be divided into three classes, which shall be known as bull-ladle aisles, hand-ladle aisles and buggy-ladle aisles.
Iron or steel foundry-A place where iron or steel or both metals are melted and poured into molds in the making of castings, together with cleaning, core making, drying, washrooms and toilet rooms, used in connection with the castings.
34 Pa. Code § 47.151