ADA Standards & Codes Flashcards
Distance from the wall to the centerline of a water closet
16”-18”
Distance from a wall partition to the centerline of a water closet in an ambulatory accessible toilet compartment
17”-19”
ICC A117.1
Accessible urinals must sit a maximum of how many inches to the top of the rim?
17”
ICC A117.1
Shelves located above an accessible work surface must no exceed
48”H
404.2.2 Clear Width
Door openings shall have a clear opening of 32” min
(a 36” door w a door jamb and hardware will result in a 32” clear door)
ADA 403.5.3 Passing Spaces
Accessible routes with clear widths less than 60” will:
Provide passing spaces (60”x60”) every 200 feet.
Or
Provide an intersection creating a T-shape to comply with 304.3.2. Base and arms extend 48” min beyond intersection
ADA 404.2.2 Clear Widths
door openings: clr width 32” min
Openings deeper than 24” w/o doors will have a clr opening of 36” min
Projections into clear opening width will not exceed 4” if in between 34”-80” AFF
Minimum STC between dwelling unit or guest room walls
Minimum IIC for floors
50, 50
how to determine minimum width of exits
stairways = occupant load x .3”
must not be less than IBC required codes
if 2+ exits; total width must be divided
base each exit off of individual floors
typical corridor widths in commercial projects
5’
(but can be modified based on space & foot traffic)
Min width for a corridor serving 50 occupants or more
AT LEAST 44” wide
Min width for a corridor serving under 50 occupants
36”
min width for corridors in schools serving 100 occupants or more
72”
Exceptions to leaving the width of a corridor unobstructed include
- doors opening into a path of egress can reduce the width up to 1/2 during the course of it’s swing, but can only project into the hallway 7” max when fully open
- handrails may reduce the width no more than 4.5” on each side
- nonstructural horizontal projections (trim, decorative features, etc.) can project 1.5” maximum from each side
- structural elements (light fixtures, furnishings, etc.) can project horizontally 4” max into the width at a height of 27-80”
when can glass be used in a 1 hr rated corridor wall
if it’s listed and labeled as a 3/4 hour fire protection rating
& the total area doesn’t exceed 25% of the length of the wall of said room
fire-resistance-rated glazing has no limitation of wall space (but has to be tested according to ASTM E119)
minimum height of egress doors
80”
width of stairways serving 50+ occupants
at least 44” if multiplier factor determined the required width less
width of stairways serving 49 or less occupants
36” wide
handrails can project 4.5” on each side
range for riser height
4”-7”max
Max riser height and min tread depth for residential occupancies serving less than 10 people
Riser: 7.75” max
Tread: 10” min
Height of top of handrails
34”-38” above nosing of treads
How far should a handrail extend pass the top riser & bottom riser
at least 12” on top
no less that the depth of one tread at the bottom
Required space between wall and handrail
at least 1.5”
Where are emergency escape and rescue openings required
R-2 occupancies w only 1 exit, R-3, and R-4
Min openable area for escape windows
5.7 ft^2 w/ window sill at 44” max AFF
Width: 20” min
Height: 24” min
at grade:
min 5 ft^2 opening
min clear width for an accessible route
36” continuously
32” at a passage point
passage points can not be longer than..
24” long for 32” doorways
any longer and opening must be at least 36”
min clear floor space for one stationary wheelchair
30” x 48”
how high can a slope of an accessible route be before being considered a ramp?
1:20 (1” rise for every 20” distance)
5%
Max height of threshold change between doorways
1/4” vertical change
height changes between 1/4” and 1/2” must be beveled
anything greater applies with ramp qualifications
