Piping, Ducts, and Electrical Conduits

VHA PROGRAM GUIDE PG-18-3

April 2001

TOPIC 7. PIPING, DUCTS, AND ELECTRICAL CONDUITS

1. GENERAL: Exposed piping is acceptable where finished ceilings are not provided. Maintain

standard ceiling height in the space.

NOTE: Do not allow pressure pipes, ducts, clean-outs, and drains, not serving the area, to enter

or pass through electrical rooms, switchboard rooms, engine-generator rooms, telephone

equipment rooms, wire closets (electric, telephone, and signal), gas storage rooms, and elevator

and dumbwaiter machinery rooms and hoistways.

2. CONSTRUCTION:

a. Electrical conduits may be placed in concrete floors and walls.

b. Locate vertical runs in pipe spaces, pipe chases, or furred-in spaces, in walls adjacent to

permanent structures such as stairwells or elevator shafts.

c. In main kitchens, place steam, condensate, gas, and water headers below the floor or in trenches.

In laundries, place horizontal drain runs, and low-pressure condensate lines below the floor or in

trenches; however, water, steam, and electrical conduit may be exposed overhead. In warehouse

buildings or rooms, place horizontal runs at height that will not reduce or restrict the net usable space.

NOTE: Do not locate piping, ducts, and electrical conduits where they will be subject to

damage or rupture. Where unavoidable conditions occur, provide suitable protection.

d. In geographical areas where pipes conveying liquids that are subject to freezing, minimize locating

those pipes in exterior walls or in unheated areas, such as attics, spaces between ceilings and roofs, or

near exterior doors. If pipes are located in those areas, provide appropriate insulation.

NOTE: Do not design pipes conveying liquids or gases within masonry walls, concrete walls, or

cast in place floors.

e. Provide access panels or doors for concealed items requiring operation, maintenance, or periodic

inspection; for example, clean-outs, coils, dampers, filter, fire alarm apparatus, strainers, switches, traps,

and valves. Appropriately mark access panels and doors to preserve the required fire resistance and

acoustical characteristics.