All steam or hot water pipes in every standard drying room, and in every drying room for any article or material which will give off explosive or flammable vapors during the drying process, shall be carried on noncombustible supports and shall be provided with noncombustible guards so arranged as to maintain a clear space of not less than six inches between such pipes and any article or material which is being dried. Any wire or sheet metal used in such guards shall be not less than one-eighth-inch thick, and where the articles or materials being dried are heavy or are handled in carts, trucks or other conveyors, the required guards shall be of sufficient strength to withstand such impacts and pressure as may be imposed upon them. No steam or hot water pipes shall be located less than six inches from the floor at any point. Provisions shall be made for the cleaning of all lint, dust, waste and refuse from around steam and hot water pipes.
Any opening for the admission of hot air to a drying room shall be protected by a metal screen or grille with openings not more than one-half inch in width. The metal of any such screen or grille shall be not less than one-eighth-inch thick. No such opening for the admission of hot air shall be nearer than six inches to the floor at any point.
Any stove in a drying room shall be provided with a standard furnace foundation. Any stove or electric heating device in a drying room shall be provided with a metal guard so arranged as to maintain a clear space of at least six inches between said stove or electric heating device and any material or article which is being dried, which shall conform in all respects to the requirements of this section for guards around steam or hot water pipes.
(Prior code § 129.1-79)