34 Pa. Code § 19.13 – Dry workrooms and ventilation.

(a) Excessive amounts of foul air or steam vapor in workrooms shall be removed by an effective system of ventilation.
(b) Floors of workrooms shall be drained to prevent pools of water from accumulating. It is recommended that the walkways in tank cellars be raised a few inches to insure dry footing.
(c) When vapor is condensed on any pipes resulting in water dropping from the pipes upon persons working beneath them, drip pans shall be installed under the pipes.