218 THE ARCHITECTURE REFERENCE + SPECIFICATION BOOK
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Chapter 21: Parking
Almost everywhere, parking is often a person’s rst and last interface with a building
and should be designed with this in mind. Primarily, parking should be safe, efcient,
well-marked, and able to accommodate users of all kinds. Because vehicle sizes uc-
tuate, parking areas must be exible enough to respond to future scenarios.
PARKING LOTS
stall length
stall
width
90º
75º
aisle
20’-0” (6 096)
8’-0”
(2 438)
20’-0” to 24’-0”, typ.
(6 096 to 7 315)
Parking Stalls Parallel Parking
General Guidelines
Pavement striping should
be 4” (102) wide, in white
or yellow paint.
Parking area surfaces should
have a minimum slope of 2
percent (a quarter-inch per
foot or 6 mm per 305 mm)
for drainage purposes.
Lots are laid out with mod-
ules. One complete module
includes one access aisle
and the parking it serves on
either side.
The most common angle for
parking is the 60º stall, which
provides for ease of entering
and exiting spaces while still
allowing for an efciently
sized module. Stalls of 45º
reduce the total number of
parking spaces for a given
area but do not require a
wide access aisle. They are
the only acceptable angle
for a herringbone parking lot
pattern. Stalls of 90º provide
the most parking spaces for
a given area, though they are
unsuitable for in-and-out traf-
c, due to the higher degree
of difculty entering and exit-
ing the stalls. They are ideal
for all-day parking, such as
for employees.
45º
60º
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Parking 219
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Job: 03-30364 Title: Rp-Architecture Reference & Specification
#175 DTP: 216 Page: 218
Job: 03-30364 Title: Rp-Architecture Reference & Specification
#175 DTP: 216 Page: 219
(RAY) (Text)
(P 285U)
General Guidelines
Pavement striping should
be 4” (102) wide, in white
or yellow paint.
Parking area surfaces should
have a minimum slope of 2
percent (a quarter-inch per
foot or 6 mm per 305 mm)
for drainage purposes.
Lots are laid out with mod-
ules. One complete module
includes one access aisle
and the parking it serves on
either side.
The most common angle for
parking is the 60º stall, which
provides for ease of entering
and exiting spaces while still
allowing for an efciently
sized module. Stalls of 45º
reduce the total number of
parking spaces for a given
area but do not require a
wide access aisle. They are
the only acceptable angle
for a herringbone parking lot
pattern. Stalls of 90º provide
the most parking spaces for
a given area, though they are
unsuitable for in-and-out traf-
c, due to the higher degree
of difculty entering and exit-
ing the stalls. They are ideal
for all-day parking, such as
for employees.
A B C D
45º 17.5’
(5 334)
12.0’
(3 658)
15.3’
(4 663)
42.6’
(12 984)
60º 19.0’
(5 791)
16.0’
(4 877)
17.5’
(5 334)
51.0’
(15 549)
75º 19.5’
(5 944)
23.0’
(7 010)
18.8’
(5 730)
61.0’
(18 593)
90º 18.5’
(5 639)
26.0’
(7 925)
18.5’
(5 639)
63.0’
(19 202)
COMMON PARKING STALL LAYOUTS
cross aisle (one-way): 14’ (4 267)
cross aisle (two-way): 24’ (7 315)
A B C D
g
h
interlocking moduleinterlock
stall depth
Recommended parking layouts and stall
dimensions vary and are most often deter-
mined by local or state zoning provisions
(which should always be consulted). Com-
monly accepted minimum stall sizes are
9' (2 743) x 18.5'–19.5' (5 639–944),
though sizes and layouts should best
accommodate their situation; for instance,
stalls at hardware or grocery stores
should be wide enough to accommodate
easy loading and unloading of large pack-
ages, and may be up to 10' (3 048) wide.
Compact car spaces may be as small as
7'-6" (2 286) x 15' (4 572) and should be
well marked and logically grouped.
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220 THE ARCHITECTURE REFERENCE + SPECIFICATION BOOK
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Pre-
1975
Subcompact <100” (2 540)
Compact 101”–111” (2 565–819)
Intermediate 112”–118” (2 845–997)
Standard >119” (3 025)
Post-
1975
Small <100” (2 540)
Medium 100”–112” (2 540–845)
Large >112” (2 845)
Typical Car Length Classifications
Hospital 1.2 per bed
Auditorium/theater/stadium 0.3 per seat
Restaurant 0.3 per seat
Industrial 0.6 per employee
Church 0.3 per seat
Retail 4.0 per 1000’ gross oor area
Ofce 3.3 per 1000’ gross oor area
Shopping center 5.5 per 1000’ gross leasable area
Hotels/motel 1.0 per room/0.5 per employee
Senior high schools 0.2 per student/1.0 per staff member
Elementary schools 1.0 per classroom
Common Parking Space Allocations
Parking Lot Flows
One-way Angled
Two-way 90 Degrees
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