MIL-HDBK-1191
17.7.3.3
Added Elevators. Where added elevators are provided solely for
the purpose of meeting the distances noted above, and where they do not
provide primary elevator service to main lobbies and main building
ingress/egress points, they are exempted from the standard average interval
and handling capacity criteria. Provide average intervals of under 55 seconds
and handling capacity equal to 7.5% of the population within the area of
service provided. Cars added for this purpose shall be service configured.
17.7.3.4
Materials Handling and Logistics Elevators. Plan materials
handling and logistics elevators to provide service as close to the user areas
as practical. Primary horizontal circulation should be on one level, where
possible. Maximum distances for travel from the elevators to materials
storage areas shall not exceed 53 m (175 ft) on inpatient floors and 61 m (200
ft) for all others, except for the primary horizontal circulation floor, where
no limit is dictated.
17.7.3.5
Service Elevator Location. Locate elevators so that visitors do
not normally pass service or materials cars en route to passenger cars, unless
those service cars are substantially hidden from view.
17.7.4
Elevator Lobbies and Groupings.
17.7.4.1
Where four or more cars are required within a group, place cars in
opposite banks, opening into a common lobby.
17.7.4.2
For service and combined use cars, two in a row are preferred and
not more than three in a row should be used; for passenger cars three in a row
are preferred and not more than four in a row should be used, as shown in
Figures 17.6 and 17.7.
17.7.4.3
If more than six service cars, or eight passenger cars are
required in one area, provide two smaller, strategic groups.
17.7.4.4
Place adjacent car entrances either in straight lines or in
opposite banks to each other as shown in Figures 17.8 and 17.9.
17.7.4.5
Elevator ingress / egress should be from a distinct elevator lobby
as shown in Figure 17.10 and not directly from a corridor. Minimum/maximum
lobbies for service cars are:
a. 3.66 to 4.27 m (12 to 14 ft) when opening opposes a wall.
b. 4.27 to 4.88 m (14 to 16 ft) when the opening opposes another
elevator.
Care should be taken to avoid creating dead end lobbies in excess of life
safety requirements. Minimum / maximum lobbies for passenger cars are:
c. 3.05 to 3.66 m (10 to 12 ft) when the opening opposes a wall.
d. 66 to 4.27 m (12 to 14 ft) when the opening opposes another elevator.
Where elevators are accessed from corridors, as shown in Figure 17.11, they
shall be located on one side of the corridor only (maximum of three cars), and
shall be setback:
e. 2.44 m to 3.66 m (8-12 ft) for service and combined use cars.
17-9
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