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 door shall not contain ventilation louvers or undercuts in excess of NFPA 80, Section 1-
11.4 requirements. Provide threshold if floor finish under door is combustible, in
accordance with NFPA 80, Section 1-11.2.
2-3.5 There are two types of elevator controllers, microprocessor and relay logic.
Microprocessors are typical in most installations. However, if you have a base that is
located in a remote location or subject to erratic building power supply, a relay logic
controller may be a better choice. Confirm elevator controller type with local Public
Works and Base Maintenance Department.
2-3.6 Determine if emergency power is required. Emergency power is usually needed in health
care facilities (with bed confinement) or high rise facilities (greater than 75'-0" (22860
mm) from ground floor to highest occupied floor). If emergency power is required,
coordinate requirements with the Electrical Engineer (for example, the number of
elevators to run on emergency power at the same time).
2-3.7 Most electric traction elevator machines are lifted up the elevator hoistway to gain access
to roof top machine rooms during construction. Provide a lifting beam at the top of the
machine room to accommodate installation of the elevator machine.
2-3.8 Provide an unobstructed 7'-0" (2133 mm) minimum vertical clearance below all solid
items (including the lifting beam for electric traction elevators) throughout the elevator
machine room. Provide a maximum machine floor to ceiling height of 12'-0" (3658 mm).
Provide a suspended gypsum board or plaster ceiling if a ceiling is required below the
structural ceiling.
2-3.9 The machine room design shall contain only equipment related to the elevator operation as
required by ASME A17.1.
2-3.10 Pipes, ducts and conduit not related to the elevator system are not allowed to penetrate the
machine room.
2-4
Elevator Pit
2-4.1 Indicate pit ladder and hoist way sump pump pit on floor plan of the elevator pit. Locate
ladder on hoist way sidewall closest to hoist way door opening. Provide sump pit and
sump pumps on all elevators.
2-4.2 Detail sump pit large enough to fully enclose submersible sump pump below hoist way
pit floor level. Minimum size of elevator sump pump pit is 1' - 6" (457 mm) wide x 1'
6"
(457 mm) long x 2'- 0" (609 mm) deep, larger is preferred. Provide fully supported,
removable grate cover, flush with elevator hoist way pit floor.
2-4.3 Indicate water stops in the walls and waterproofing for elevator pit floor and walls.
2-4
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