Appliances shall be located with respect to
building construction and other equipment so as to permit
access to the appliance. Sufficient clearance shall be maintained
to permit cleaning of heating surfaces; the replacement
of filters, blowers, motors, burners, controls, and vent connections;
the lubrication of moving parts where necessary; the
adjustment and cleaning of burners and pilots; and the proper
functioning of explosion vents, where provided. For attic
installation, the passageway and servicing area adjacent to the
appliance shall be floored. [NFPA 54:9.2.1]
Unless otherwise specified, not less than 30 inches (762 mm) in depth, width, and height of working space shall be provided.
Exception: A platform shall not be required for unit heaters or room heaters.
Unless otherwise specified, not less than 30 inches (762 mm) in depth, width, and height of working space shall be provided.
Exception: A platform shall not be required for unit heaters or room heaters.
Where equipment or appliances that
require service are installed on a roof having a slope of 4 units
vertical in 12 units horizontal (33 percent slope) or more, a
level platform of not less than 30 inches by 30 inches (762
mm by 762 mm) shall be provided at the service side of the
equipment or appliance.
Equipment and appliances located on roofs or other elevated locations shall be accessible. [NFPA 54:9.4.3.1]
Buildings exceeding 15 feet (4572 mm)
in height shall have an inside means of access to the roof,
unless other means acceptable to the Authority Having
Jurisdiction are used. [NFPA 54:9.4.3.2]
The inside means of access
shall be a permanent, or foldaway inside stairway or
ladder, terminating in an enclosure, scuttle, or trap
door. Such scuttles or trap doors shall be not less than
22 inches by 24 inches (559 mm by 610 mm) in size,
shall open easily and safely under all conditions, especially
snow; and shall be constructed so as to permit
access from the roof side unless deliberately locked
on the inside.
Not less than 6 feet (1829 mm) of clearance shall be between the access opening and the edge of the roof or similar hazard, or rigidly fixed rails or guards not less than 42 inches (1067 mm) in height shall be provided on the exposed side. Where parapets or other building structures are utilized in lieu of guards or rails, they shall be not less than 42 inches (1067 mm) in height. [NFPA 54:9.4.3.3]
Not less than 6 feet (1829 mm) of clearance shall be between the access opening and the edge of the roof or similar hazard, or rigidly fixed rails or guards not less than 42 inches (1067 mm) in height shall be provided on the exposed side. Where parapets or other building structures are utilized in lieu of guards or rails, they shall be not less than 42 inches (1067 mm) in height. [NFPA 54:9.4.3.3]
Permanent ladders
required by Section 304.3.1.1 shall be constructed in
accordance with the following:
- Side railings shall extend not less than 30 inches (762 mm) above the roof or parapet wall.
- Landings shall not exceed 18 feet (5486 mm) apart measured from the finished grade.
- Width shall be not less than 14 inches (356 mm) on center.
- Rungs spacing shall not exceed 12 inches (305 mm) on center and each rung shall be capable of supporting a 300 pound (136.1 kg) load.
- Toe space shall be not less than 6 inches (152 mm).
Permanent lighting shall
be provided at the roof access. The switch for such
lighting shall be located inside the building near the
access means leading to the roof. [NFPA 54:9.4.3.4]
An
attic or under-floor space in which an appliance is installed
shall be accessible through an opening and passageway not
less than the largest component of the appliance, and not less
than 22 inches by 30 inches (559 mm by 762 mm).
Where the height of the passageway is less than 6 feet (1829 mm), the distance
from the passageway access to the appliance shall not
exceed 20 feet (6096 mm) measured along the centerline
of the passageway. [NFPA 54:9.5.1.1]
The passageway shall be
unobstructed and shall have solid flooring not less than
24 inches (610 mm) wide from the entrance opening to
the appliance. [NFPA 54:9.5.1.2]
A level working platform not
less than 30 inches by 30 inches (762 mm by 762 mm)
shall be provided in front of the service side of the appliance.
[NFPA 54:9.5.2]
Exception: A working platform need not be provided where the furnace is capable of being serviced from the required access opening. The furnace service side shall not exceed 12 inches (305 mm) from the access opening.
Exception: A working platform need not be provided where the furnace is capable of being serviced from the required access opening. The furnace service side shall not exceed 12 inches (305 mm) from the access opening.
A permanent 120-volt receptacle outlet and a lighting fixture shall
be installed near the appliance. The switch controlling
the lighting fixture shall be located at the entrance to the
passageway. [NFPA 54:9.5.3]