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ADA
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Gravity
Terms in this set (67)
Wheelchair Passage Width
32" at a point and 36" continuously.
Width for Wheelchair Passing
60"
Wheelchair Turning Radius
60"
Wheelchair clear ground space
30"x48"
Forward Reach Height
15-48
When a ramp is to be used.
Running slope <1:20 is a ramp.
Cross slope should never exceed 1:50.
If an accessible route has changes in level <1/2", then curb ramp, ramp, elevator, or platform lift shall be provided.
Areas of Rescue: Stairway Width
48" between handrails.
Head Room
80"
Changes in Level
Up to 1/4" may be vertical without edge treatment.
1/4"-1/2" shall be beveled with a slope no greater than 1:2
<1/2" need ramp.
Ramp Design: Max slope and rise
Max slope: 1:12
Max rise for any run: 30"
Handrails are needed when?
If a ramp has a rise greater than 6", or horizontal projection greater than 72", then it should have handrails on both sides.
Top of handrail mounted between 34" and 38" above stair nosing.
Clear space between handrail and wall
1 1/2"
Treads and Risers
Treads no less than 11" wide. Open risers not permitted.
Risers 4" high min, 7" max.
Door Clear Width
Minimum of 32" with door open 90 degrees. Measured between face of door and opposite stop.
(Doors not requiring full user passage, ex. shallow closets, may have clear opening reduced to 20")
Pull side clearance: 18" min from door and 60" min from face of wall
Push side clearance: 12" min from door and 48" from face of wall
Distance between two Doors in Series
Minimum between two doors: 48" plus width of any door swinging into space. Shall either swing in same direction, or away from space between doors.
Area of Rescue Assistance
Area with direct access to an exit, where people who are unable to use stairs may remain temporarily in safety during emergency evacuation.
Universal Design
Broad-spectrum ideas meant to produce buildings, products and environments that are inherently accessible to older people, people without disabilities, and people with disabilities. Factors aesthetics into earlier notions of barrier-free and accessible design.
Allowable openings in
Gratings
Maximum size of opening is no greater than 1/2" in one direction, and elongated openings oriented so that long dimension is perpendicular to path of travel.
Vehicle Spaces
96" min width.
Adjacent aisle 60" min, or 96" for vans.
Accessible route
Continuous unobstructed path connecting all accessible elements and spaces in building or facility.
Elements of accessible route
- corridors
- doorways
- floors
- ramps
- stairs
- elevators
-lifts
- clear floor space at fixtures
Wheel chair clearance
- 30"x48"
- 60" diameter for maneuvering
- T shape 36" each way
Min path width
-36" (32" bottleneck max 24" long)
-2 wheelchairs pass 60", every min. 200'
Path max slope
- max. slope 1:20
Min
doors
width
32" clear opening with max depth 24"
Doors handles mounting
height
max 48" A.F.F.,
-doorknobs are not allowed
Toilet Grab bars mounting
height
33" to 36" A.F.F.
Center of
WC
off the wall.
16" to 18"
Wall vs Floor
mounted WC compartment clearance
Floor mounted adds 3" to clearance in front of WC.
Wall(56"x60") Floor(59"x60")
WC Side wall
Grab bars
Side: 42" long min
ends
52"
and starts max
12"
off the wall.
Behind:
36"
WC Rear wall
Grab bars
36 inch min - extends 24" on transfer side of wc and 12" on side wall side
Lavatory size
Min 17"x 30"
with min. 8" knee clearance and 48" clear floor space. At min 34" A.F.F.
Ramps in
new buildings
slope: 1:20 to 1:12 -max rise: 30"
Allowable Cross slope of ramps
max of 1:48
Extra provisions for Ramps in
existing buildings
slope: 1:10 to 1:8 -max rise: 3"
slope: 1:12 to 1:10 -max rise: 6"
A slope steeper than 1:8 is prohibited
Ramp
Landing
size before and after ramp runs
-(width of ramp) x 60" clear
-if ramp change direction 60' x 60"
Min Ramp
Width
36" clear between handrails
When
Handrail
is required
- ramp of: over 6" in rise or 72" lenght
Ramp
Handrail
design
- 34" to 38" A.F.F.
- 12" extended beyond ramp run
- min 1 1/4" to 1 1/2" diameter
Protruding objects - allowable height and amount object can protrude?
if lower edge is less than
27"
object can protrude any amount as long as other clearances are provided. If lower edge is heigher than 27", then object can only protrude
4"
https://www.ada.gov/regs2010/2010ADAStandards/images/ADA-AB13.gif
Coat Hook Height
40-48
Structural Strength for grab bars
250 lbs
Clearance for Bathtubs
Figure (a) shows a bathtub with a removable in-tub seat. The bathtub has clearance in front 30 inches (760 mm) wide minimum that extends the length of the tub. Figure (b) shows a bathtub with a permanent seat at the head end (the end opposite the controls). The tub has clearance in front 30 inches (760 mm) wide minimum that extends the length of the tub plus 12 inches (305 mm) minimum beyond the seat. Both figures show that a lavatory can be located at the foot end of the tub clearance.
Handrail edge protection
The width of the ramp should extend 12" beyond the inside face of the guardrail
or
a curb or barrier shall ve provided that prevents the passage of a 4" diameter sphere where any portion of the sphere is within 4" of the finish floor
Stairs
riser
max h7" x min d11"
Accessible
exit stairway
width
min 48" between handrails
Number of
fixed or public (restaurants)
seat required to be accessible
5% but not less than 1 seat
Number of wheelchair spaces
required in place of assembly per number of total seats
4 to 25 - 1
26 to 50 - 2
51 to 300 - 4
301 to 500 - 6
over 500 - 6 + (1 for each extra 100)
1% but not less than 1 must be aisle seat
Mirrors requirement
Mirrors installed above countertops bottom part has a max of 40 inch height. Not above countertops has a 35 inch max height.
...
...
How high should the handicap sign for restroom be above the floor
48-60 inches above the floor on the latch side
Accessible sleeping rooms should have X clear width on both sides of beds
36 inches
Walking Surface Clear Width Exception
Walking surface clear width can be 32 for up to 24 inches provided they are separated by segments of 48"
Food Service Counter Max Height
34 inches
Counter slope Max slope
1:20
U shaped kitchen minimum width
60"
Pass-through kitchen minimum width
40"
Rise for any ramp shall be X inches maximum
30
Vertical Clearance Minimum
80 Inches Minimum, but when it gets any lower, need handrails at least 27 inches high
Max Mirror Height with and without sink
Mirrors installed above countertops bottom part has a max of 40 inch height. Not above countertops has a 35 inch max height.
Dining Surface and Work Surface Height
28"-34"
Clear Width at 180 degree Turn in corridor
42 inch clear width requires minimum of 48 inches of turning element.
less than 42 inch clear width requires 60 inches of turning element.
https://www.access-board.gov/images/guidelines_standards/Buildings_Sites/ada-standards/ADA-AB21.gif
Alcove forward approach min width requirements
Alcoves shall be 36 inches wide minimum where the depth exceeds 24 inches
Alcove side approach min width requirements
Alcoves shall be 60 inches wide minimum where the depth exceeds 15 inches
...
Figure 306.3(a) Knee Clearance: Elevation. Knee clearance is 27 inches (685 mm) high minimum above the floor or ground for a minimum depth of 8 inches (205 mm), measured from the leading edge of the element. The vertical clearance decreases beyond this depth to a height of 9 inches (230 mm) minimum at depth of 11 inches (280 mm) minimum measured from the leading edge of the element. Figure 306.3(b) Knee Clearance: Plan. Combined knee and toe clearance can extend 25 inches (635 mm) maximum under an element.
Carpet pile maximum height
1/2"
What is the Maximum height door hardware can be hung?
Maximum height of 48 inches above floor
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ENGINEERING
Small halogen light bulb receives electrical power of 50W. The small filament is at 1000 K and gives out 20% of the power as light and the rest as heat transfer to the gas, which is at 500 K; the glass is at 400 K. All the power is absorbed by the room walls at 25$^{\circ} \mathrm{C}$. Find the rate of generation of entropy in the filament, in the total bulb including the glass, and in the total room including the bulb.
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The following equation describes the motion of a certain mass connected to a spring, with viscous friction on the surface $$ 3 \ddot { y } + 39 \dot { y } + 120 y = f ( t ) $$ where $f ( t )$ is an applied force. Suppose that $f ( t ) = 0$ for $t < 0$ and $f ( t ) = 10$ for $t \geq 0$ . a. Plot $y ( t )$ for $y ( 0 ) = \dot { y } ( 0 ) = 0$ b. Plot $y ( t )$ for $y ( 0 ) = 0$ and $\dot { y } ( 0 ) = 10 .$ Discuss the effect of the nonzero initial velocity.
ENGINEERING
Consider the spring–mass–damper system defined by (use basic SI units) $4 \ddot{x}(t)+24 \dot{x}(t)+100 x(t)=16 \cos 5 t$ First, determine if the system is underdamped, critically damped, or overdamped. Then compute the magnitude and phase of the steady-state response.
ENGINEERING
Prove the following. If in a graph any two vertices are connected by a unique path, the graph is a tree.
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