Building Support Spaces
design, as well as maintenance and cleaning of light
fixtures and servicing smoke detectors (if provided).
Placement of Core Elements and Distances. In buildings
Portable lifts or other appropriate equipment can be used
with large floor plates not all core elements need to be
to access these elements where approved by the Facility
placed at each core location. How often each element
Manager; scaffolding should be avoided. The flooring
needs to be repeated is governed by occupant needs and
materials within this space must be able to accommo-
the following maximum radii and distances:
date the loads and use of this equipment. Maintenance
professionals should be included in Schematic and
Elevators should always be grouped in banks of at least
Design Development reviews to address these issues.
two for efficiency. Travel distances from a given office or
work station to an elevator shall not exceed 200 feet.
Mechanical, electrical and communication systems must
Travel distances to stairs are governed by code.
be integrated into the lobby design. Fixture and outlet
locations, and forms, sizes, finishes, colors and textures of
Toilets should also be placed within 200 feet of every
exposed mechanical and electrical elements, must be
office or work station.
coordinated with all other interior elements. It is desirable
Electrical rooms must be stacked vertically and should be
to conceal HVAC supplies and returns.
located so that the area of coverage does not exceed
12,000 square feet and the length of the branch circuits
Elevator and Escalator Lobbies. Like entrance lobbies,
do not exceed 150 feet. Shallow, secondary closets off
elevator and escalator lobbies shall be designed to
permanent corridors may be used for receptacle
efficiently accommodate the movement of pedestrian
traffic to other parts of the building. Adequate space
the farthest work station exceeds 150 feet and a separate
should be provided to perform this function.
riser is not warranted.
The elevator and escalator lobbies should be close to the
Communication Closets must be stacked vertically and
main lobby and be visible from the main entrance. Visual
shall be placed so that wiring runs do not exceed 150 feet.
supervision and physical control of the lobbies for
Toilet Spaces. Toilet space includes general use toilets and
elevators and escalators shall be a prime consideration for
associated vestibules, anteroom and contiguous lounge
If unusually large pieces of equipment or furniture such
Toilet rooms for both sexes should also be located
as mechanical equipment or conference tables must be
adjacent to the cafeteria.
transported to a specific floor via an elevator, verify that
the item can be moved into and through the lobby space.
Toilet rooms shall be screened from public view without
the use of double door vestibules at entrances. All public
Public Corridors. A complementary palette of materials
and common use toilets must have facilities for the
should be used to establish a hierarchy in the treatment of
disabled and comply with ABAAS. All other toilets must
spaces and corridors as they lead visitors from the
have provision for future adaptation to accessible
entrance lobby to the main corridors and finally to
departmental corridors. It is desirable to introduce as
much natural light as possible into corridors, through
windows, transoms or borrowed light.
Revised March 2005 PBS-P100