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NCIDQ - IDFX > Chapter 9: Barrier-Free Design > Flashcards

Chapter 9: Barrier-Free Design Flashcards

1
Q

Which part of the ADA most affects designers?

A

Title III, Public Accommodations and Commercial Facilities

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2
Q

What is the full name of the current ADA guidelines?

A

2004 Americans with Disabilities Act and Architectural Barriers Act Accessibility Guidelines (ADA/ABA Guidelines)

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3
Q

What are scoping provisions?

A

To account for any differences between codes and standards, scoping provisions dictate how many accessible elements must be provided.

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4
Q

What is the section of the IBC that addresses accessibility?

A

ICC A117.1, Accessible and Usable Buildings and Facilities

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5
Q

How are the ADA/ABA Guildines organized?

A

They’re organized by a numbering system consisting of three parts:
1st - deals with ADA application and scoping requirements
2nd - covers ABA application and scoping requirements
3rd - gives the technical requirements intended to be used by both the ADA and ABA

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6
Q

What is an accessible route?

A

A continuous, unobstructed path connecting all accessible elements and spaces in a building or facility. Includes corridors, doorways, floors, ramps, elevators, lifts, and clear floor space at fixtures.

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7
Q

Minimum clear width for an accessible route

A

36” continuously

32” at passage point

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8
Q

Maximum length of passage point

A

24”

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9
Q

Minimum passage width for two wheelchairs

A

60”

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10
Q

What do you do if an accessible route is less than 60”?

A

Passing spaces at least 60”x60” must be provided at intervals not to exceed 200’

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11
Q

Minimum clear floor space to accommodate 1 stationary wheelchair

A

30”x48”

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12
Q

Minimum space required for a wheelchair to make a 180 turn

A

60” diameter

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13
Q

Maximum slope for accessible route

A

1:20 / 5%

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14
Q

Minimum clear width of door

A

32”

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15
Q

Maximum vertical change in elevation at threshold

A

1/4”

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16
Q

Minimum clear width for T-shaped space for 180 turns

A

36”

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17
Q

Minimum dimensions for turning in corridors or around obstructions

A

If obstruction is <48”: 42” clear on approach, 48” on turn

If obstruction is >48”: 36” clear on approach, 36” on turn

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18
Q

How do you treat elevations between 1/4 and 1/2”

A
  • Must be beveled
  • No part of threshold slopes more than 1 vertical unit for each 2 horizontal unit (1:2 slope)
  • Any vertical change over 1/2” must comply with ramp specifications
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19
Q

Door operating device options

A
  • Lever handle
  • Push-type mechanisms
  • U-shaped handles
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20
Q

Opening force required to push or pull open an interior door

A

Cannot be more than 5 ft-lbf.

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21
Q

Front approaching doors - minimum clear space in front of pull side

A

60”

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22
Q

Front approaching doors - minimum clear space in front of push side

A

48”

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23
Q

Front approaching doors - minimum clear space to side of latch on pull side

A

18”

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24
Q

Front approaching doors - minimum clear space to side of latch on push side

A

12”

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25
Q

Hinge side approaching doors - minimum clear space in front of pull side

A

If clear space to side of latch= 36”, clear space in front of door must be 60”
If clear space to side of latch=42”, clear space in front of door must be 54”

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26
Q

Hinge side approaching doors - clear space in front of push side door

A

y=42”

x=54”

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27
Q

Latch side approaching doors - clear space in front of door on pull side

A

48”

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28
Q

Latch side approaching doors - clear space to side of latch on pull side

A

24”

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29
Q

Latch side approaching doors - clear space in front of door on push side

A

42”

30
Q

Latch side approaching doors - clear space to side of latch on push side

A

24”

31
Q

Clearance between double doors

A

48”

32
Q

Mounting height of grab bars in toilet compartments

A

33”-36” AFF

33
Q

Minimum clear opening of toilet door

A

32”

34
Q

Grab bar dims in toilet compartment

A

Back wall: 36” long; mounted 6” from side wall

Side wall: 42” long; mounted 12” from back wall

35
Q

Clear floor space from toilet back wall for wall-mounted wc

A

56”

36
Q

Clear floor space from toilet back wall for floor-mounted wc

A

59”

37
Q

Centerline of toilet from wall

A

16-18”

38
Q

Ambulatory compartment requirements

A
  • 42” grab bars on both sides
  • Centerline of toilet 17-19”
  • 60” min. compartment depth
  • 35”-37” compartment width
39
Q

Urinal elongated rim max height

A

17”

40
Q

Clearance between urinal shields

A

29”

41
Q

What types of faucets are acceptable?

A

Must be operable with one hand, cannot require right grasping, pinching, or twisting of the wrist. Lever operated, push-type, and automatically controlled mechanisms are acceptable.

42
Q

Mirror mounting height above lavatories or countertops

A

Bottom edge of the reflecting surface no higher than 40”

43
Q

Mirror mounting height generally

A

Bottom edge no higher than 35”

44
Q

Max height of lavatory

A

34”

45
Q

Toe clearance under lavatory

A

9”H min; 6”D max

46
Q

Minimum lavatory depth

A

17”

47
Q

Min. knee clearance for lavatory

A

8”

48
Q

Clear floor space for bathtubs

A

Side approach, seat in tub: 30”xlength of tub
Front approach, seat in tub: 48”x60”
Seat at head of tub: 30”x length of tub+12”

49
Q

Maximum pile height of carpet

A

1/2”

50
Q

Max slope for ramp

A

1:12 (1” of rise for every 12” of run)

51
Q

Maximum rise for any ramp

A

30”

52
Q

Exception to max slope for ramp

A

1: 10 is permitted if the max rise does not exceed 6”
1: 8 slope is permitted if max rise does not exceed 3”

53
Q

Min clear width of ramp

A

36”

54
Q

If ramps change direction at a landing, how big should should the landing be

A

60” squared

55
Q

When are handrails required for ramps

A

Ramps with rises greater than 6”; lengths greater than 72”

56
Q

Handrail extension beyond top and bottom of ramp segment

A

12”

57
Q

Handrail gripping surface for ramp

A

1 1/4” to 1 1/2”

58
Q

Maximum riser height and tread riser to riser length

A

7”; 11”

59
Q

Stair nosing requirements

A

1 1/2” max depth; 60 degree radius

60
Q

Stair handrail gripping surface

A

1 1/4”-2” diameter
or
Perimeter 4”-6 1/4” and max cross section dim of 2 1/4”

61
Q

Egress stairway clear width

A

48”

62
Q

Clear space between handrail and wall

A

1 1/2”

63
Q

Protruding object requirements

A

4” max depth if >27” AFF

Larger objects must be >80” AFF

64
Q

What is a detectable warning?

A

A surface feature built in or applied to walking surfaces or other elements to warn of hazards on a circulation path. ie. 0.2” high truncated domes spaced between 1.6”-2.4” on center in a square grid pattern.

65
Q

Where are detectable warnings required?

A

Passenger transit platform edges where there is no guard or other protective elements; other placement depends on local code

66
Q

Audible alarm sound requirement

A

Exceed prevailing sound level in room by 15 dB

67
Q

ADA lettering requirements

A

5/8” - 2” depending on viewing distance
Uppercase
Sans serif typeface
Grade 2 Braille

68
Q

ADA sign requirements

A

Eggshell, matte or non-glare finish

Characters contrasting with background

69
Q

Elevator requirements interior designers need to know

A

Call button and floor buttons no higher than 48” AFF

70
Q

How much accessible seating is required for built-in/fixed seating in public or common-use areas?

A

5% but not less than 1 table

Should be dispersed around facility

71
Q

Minimum number of wheelchair locations for places of assembly?

A

At least 1% must be aisle seats with no armrests on the aisle side or must have removable or folding armrests on the aisle side.

NCIDQ - IDFX (22 decks)

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