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Code and Accessibility
Text
Handles, pulls, latches, and locks must be easy to grasp with one hand. Door hardware should
be operable with a closed st or loose grip. All operating devices should be mounted between
(1 220)
60"
(1 525)
48" (1 220)
12" (305)
Front Approach
closer
Push-Side Clearance
1
Add 6" (150) if closer is provided.
2
Add 6" (150) if closer and latch are provided.
3
Add 12" (305) if closer and latch are provided.
4
Beyond hinge side.
24"
(610)
Latch-Side Approach
closer
48" (1 220)
22"
(560)
42" (1 065)
Hinge-Side Approach
closer no closer
48" (1 220)
22"
(560)
42" (1 065)
no closer
24"
(610)
MANEUVERING CLEARANCES AT MANUAL DOORS AND GATES
Approach Direction Door or Gate
Side
Perpendicular to Doorway Parallel to Doorway
Front Pull
60" (1 525) 18" (457)
Hinge-side Pull
60" (1 525) 36" (914)
Hinge-side Pull
54" (1 370) 42" (1 065)
Latch-side Pull
48" (1 220)
1
24" (610)
Front Push
48" (1 220) 0" (0)
3
Hinge-side Push
42" (1 065)
2
22" (560)
4
Latch-side Push
42" (1 065)
1
24" (610)
Job:02-30056 Title: RP-Interior Design Reference and Specification
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Job:02-30056 Title: RP-Interior Design Reference and Specification
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Job:02-30056 Title: RP-Interior Design Reference and Specification
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THE INTERIOR DESIGN REFERENCE + SPECIFICATION BOOK
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VERTICAL CIRCULATION
Stairs
ADA requires that all steps in a ight of stairs have
uniform riser and tread dimensions. The minimum
riser height is
4 inches (102 millimeters) and the maxi-
mum riser height is 6 inches (152 millimeters). The
minimum depth of a tread is 11 inches (280 millime-
ters); however, these dimensions should be veried
with local building codes. ADA does not permit open
risers.
tread
riser
T + 12" (305)
return handrail
to wall
27"
(686)
80"
(2 032)
landing
34"–38"
(864–965)
12"
(305)
80"
(2 032)
18' (5.48 m)
12' (3.65 m) max.
between
landings
Flush Riser Beveled Nosing Curved Nosing
30° max.
slope
1
/
2
" (13)
radius max.
1
1
/
2
" (38)
Guardrail
Handrail Cross Sections
A rule of thumb for a well-propor-
tioned stair is that the sum of two
risers plus one tread should equal
between
24 and 25 inches (610–35
millimeters). For example: (
2) 6" ris-
ers +
13" tread = 25" or (2) 152 mm
risers +
330 mm tread = 482 mm.
1
1
/
2
" (38)
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Job:02-30056 Title: RP-Interior Design Reference and Specification
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Code and Accessibility
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landing
Guardrail Handrail
DN
DN
accessible width =
dimension between
handrails
50≤ occupants =
36" (914)
50≥ occupants =
44" (1 118)
min. 44" (1 118) between
handrails, if stairs = area
of evacuation
minimum width =
width of stairs
12"
(305)
42" (1 067)
34"–38" (864–965)
4" (102)
guardrail
handrail
handrail
1
1
/
2
" (38)
cross section
1
1
/
2
" – 2"
(38–51)
cross section not
to exceed 2
1
/
2
" (64)
Handrail Cross Sections
4" (102)
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THE INTERIOR DESIGN REFERENCE + SPECIFICATION BOOK
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Ramps
The maximum rise of a ramp cannot exceed 30 inches (762 millimeters) in height without a
landing. Ramps must have landings at both top and bottom. The maximum slope of a ramp
is
1:12. A slope that is 1:20 or less is not considered a ramp and does not require handrails.
Ramp runs that exceed a 6-inch (152-millimeter) vertical drop require handrails on the sides,
as well as vertical edge protection or a
12-inch (305-millimeter) horizontal surface extension
beyond the handrails. The minimum clear width of a ramp is 36 inches (914 millimeters).
UP
max. slope
1:12
slope of 1:20≤ is not a ramp
36" (914)
clear width
60"(1 524) min.
12
1
landing
ramp
ramp runs 6" (152) ≥
require handrails
ramp
ramp
landinglanding
landingramp
60" (1 524) min.
36" (914) min.
Straight Run Ramp Change of Direction
Elevators
Visible, tactile, and audible displays are
required at and around elevators to allow
disabled persons to function independently
in elevators. Hall signals at each elevator
should announce the arrival of an elevator
audibly and visually. Audible signals sound
once for cars traveling up and twice for cars
traveling down; for new elevators, they must
verbally announce each oor at each stop.
Tactile designations are required at jambs
and should be mounted
millimeters) above nished oor. Hoistway
key access and elevator call buttons must
be mounted
limeters) high, as should all interior control
buttons unless the building exceeds sixteen
oor levels.
60" (1 524) 60" (1 524) min.
60" (1 524) min.
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Job:02-30056 Title: RP-Interior Design Reference and Specification
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Code and Accessibility
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Elevators
Visible, tactile, and audible displays are
required at and around elevators to allow
disabled persons to function independently
in elevators. Hall signals at each elevator
should announce the arrival of an elevator
audibly and visually. Audible signals sound
once for cars traveling up and twice for cars
traveling down; for new elevators, they must
verbally announce each oor at each stop.
Tactile designations are required at jambs
and should be mounted 60 inches (1 524
millimeters) above nished oor. Hoistway
key access and elevator call buttons must
be mounted 35 to 48 inches (889 to 1 220 mil-
limeters) high, as should all interior control
buttons unless the building exceeds sixteen
oor levels.
80" (2 032) min.
51" (1 295) min.
68" (1 727) min.
hall signal
call button
tactile and
Braille oor
indicator
Centered Door Off-Centered Door
60" (1 524)
35" (889) min.
48” (1 220) max.
Elevator Cab Control Panel
51" (1 295) min.
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