18'-0" Navy Composite (note 3)
Basement Underslung, 2:1 Geared Traction
8'-0" Navy Composite
14'-0" Navy Composite
Notes: 1. The dimensions recommended by NEII's Vertical Transportation
Standards Guidebook, 1983 edition, reflect clearances required for an
to approach it's terminal at it's rated speed and without terminal
2. The Navy's composite hoistway follows the NEII guideline.
when conditions dictate, reduced pit and overhead clearances can be used in
design as shown by the measurements specified by the major manufacturers.
These reduced measurements are feasible due to the installer slowing the car
at a predetermined distance from the terminal.
3. Geared basement traction installations are not popular
configurations as demonstrated by the lack of dimensions supplied by both the
major manufacturers and NEII. Great care should be exercised when designing
this type of hoistway. ANSI A17.1, Part I, should be examined for basic
minimum clearances. Factors such as cab height, refuge space, and overhead
machine space must be properly considered to ensure design adequacy.
4. Dimensions for the basement underslung type elevator are not
available through manufacturer's brochures or the NEII Guidebook. This type
configuration should be considered a custom installation, and avoided