c.
Mechanical equipment rooms-ceiling heights shall accommodate
the equipment and associated piping, ducts and conduits.
**
Life Safety Code, NFPA-101, requires a means of egress to
have a minimum headroom of 2300 mm (7'6") and any
protection from the ceiling to be at least 2000 mm (6'8")
from the floor.
18.
PARAPET WALLS, ROOF STRUCTURES, AND WALKWAYS:
18.1
Masonry parapet walls are potential sources of water penetration,
unequal thermal expansion, additional structural loads, and
increased costs. Therefore, do not use such walls for any
building unless specifically permitted by the Project Manager.
Proposed parapet walls must be justified by aesthetic, functional
or economic considerations. Where permitted, design and reinforce
them to assure stability and water tightness when subjected to
lateral or thermal forces.
18.2
Design roof structures, such as penthouses and architectural
screens enclosing or concealing roof-mounted mechanical equipment,
compatible in appearance and with the material, texture, color,
and shape of the building. Where it is necessary to expose
roof-mounted mechanical equipment, minimize its appearance by
location, low silhouette and harmonious color.
18.3
Provide roof walkways of prefabricated asphalt planks with nonslip
surfaces on access routes over roofs and to mechanical equipment
requiring recurrent maintenance. Where necessary for safety of
maintenance workers, provide ladders, railings, stairs, and/or
platforms. Show the location where such facilities shall be
provided and details on architectural drawings.
18.4
Provide attic spaces, which are designed to have batt or loose
insulation placed on the floor and contain mechanical or
electrical equipment requiring periodic maintenance, with walkways
for access to this equipment and to prevent compressing the
insulation. Show the location and details of attic walkways on
architectural working drawings.
18.5
Whenever mechanical equipment requiring periodic maintenance is
installed on a roof more than 6 m (20 feet) above the ground,
provide guardrails or fences between the roof edge and any
equipment or walkways less than 3 m (10 feet) from the edge.
Design the guardrails 1050 mm (42 inches) high and in accordance
with OSHA requirements for standard guardrails.
19.
LOW SLOPE ROOF SYSTEMS:
19.1
Design low slope roof systems in accordance with the
recommendations of the National Roofing Contractors Association
(NRCA) Roofing and Waterproofing Manual and this manual.
19.2
Design all roofs with slope to roof drains or gutters.
19.3
Where alterations or repairs are required to over 40 percent of
flat roof areas, consider reroofing.
19.4
Reroofed areas shall conform to this Article.
19.5
Low-slope roof systems include but are not limited to the
following roofing membranes with roof insulation:
1.
Bituminous built-up roofing systems
2.
Modified bituminous roofing systems
3.
Single-ply sheet roofing systems
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