Barrier-Free Design Flashcards
What is the basic history and function of ADA?
- Passed into law in 1990
- Is not a building code enforced by inspection, but civil suit may be made if it is not followed
- Since it is Federal law, it overrides all other codes
- Title III (four total), “Public Accommodations and Commercial Facilities”, is the main one that affects building design
- These requirements are summarized and coordinated in the “ADA Standards for Accessible Design” document
- Applies to State and Federal buildings, public buildings, and commerical buildings
What is a Site Arrival Point?
Includes:
- parking
- passanger loading zones
- sidewalks
- public transporation stops
- connections to other buildings
Must be connected to an Accessible Route, which coincide with or be in the same general area as the general circulation path.
What is an Accessible Route between Accessible spaces/elements not required?
When the only other way of getting between those spaces/elements is vehicular and there are not pedestrian routes between them.
What are the surface and space requirements for an Accessible Route?
- slope no greater than 1:20 (5%)
- 36” clear
- 32” clear at doors (clear, not panel width, when 90-degrees open)
What are the door hardware requirements?
- 5 lbf-ft opening force, but may be greater if it is a fire door and is required by local code
- doors with a closer must take no less than 3s to close form a 70-degree open position
- floor height cannot abruptly change more than 1/4”
- heigh changes of over 1/4” but less than 1/2” are allowed if at a 1:2 slope bevel
- round door knobs are not allowed (but be easily graspable)
- operation hardware may not be above 48”
What are the door approach latch clearances?
Forward Approach
- 18” pull-side
- 12” push-side
Hinge Side Approach
- 36” pull-side (42” if depth is less than 60)
- 22” push-side FROM HINGE, NOT LATCH
Latch Side Approach
- 24” pull-side
- 24” push-side
How far is needed between consecutive doors?
48” from a door swing
When are ambulatory stalls required?
When there are six or more waterclosets or watercloset fixtures.
What are the general requirements for ramps?
- Min 36” wide
- Max 1:12 slope
- 1:10 slope is allowed if vertical rise is <6” vertical rise and 1:8 slope if vertical is <3” (and a shallower slope is not possible)
- Max 30” vertical rise before a landing
- Must have landings at the top and bottom
- landings must be as wide as the ramp
- landings must be 60” deep
- landings must be 60” square if the ramp changes direction there
- Railings required for vertical rises over 6” or lengths over 72”
What are the requirements for Areas of Refuge?
- Required in buildings withing sprinklers
- Provided at stair landings of Exit Stairs
- One 30x48 clear space, separate from the Accessible route, per every 200 occupants
When and how is accessible seating at tables required?
- Required when fix/built-in seating is provided for public or common use
- If so, 5% of the seating areas must be accessible (not less than 1)
- If multiple are provided, they must be evenly distributed across the space
- Must have a Clear Space (30x48) that is able to pull under the table
- 17-25” pull-under if forward-facing
- 19” pull-under if side-facing
- must have 36” clear in front of table
When and how is fix auditorium seating required?
- Number of accessible seating is per table in the ADA Standards
- At least 5% of seats at aisles must be closest to accessible route and must be collapsable/removable
- Designated accessible aisles must be marked
- Accessible seating spaces must be evenly distributed among different ticket prices, angles of view, ETC.
- Each accessible seating space must have at least one companion seat next to it
