A similar extension is required at the bottom of stairs, except that the handrail at the bottom of a stair is required to extend the length of one tread at the angle of the stair. Â ...
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  Where do I measure for a handrail extension?
  
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  T503.5 Exterior Illumination for Boarding and Alighting Areas
  
Where doorways have steps, the illumination shall be 1 foot-candle (11 lux) minimum for a distance of 3 feet (915 mm) measured beyond the outside edge of the doorway or bottom step tread...
 - Aluminum Swaged SG Series Pressure-Locked Grating
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  1011.5.3 Raised Edges or Walls
  
Where fire rings, grills, or fireplaces are constructed with raised edges or walls, the depth of the raised edge or wall shall be 10 inches (255 mm) maximum....
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  1011.5.3 Raised Edges or Walls
  
Where fire rings, grills, or fireplaces are constructed with raised edges or walls, the depth of the raised edge or wall shall be 10 inches (255 mm) maximum....
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  4.2.5 Raised Edge
  
Where fire rings, grills, or fireplaces are constructed with raised edges or walls, the depth of the raised edge or wall shall be 10 inches (255 mm) maximum....
 - EZ-ACCESS Suitcase Singlefold Ramp
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  5.2.1 Transfer Surface Size Recommendations for M301
  
The technical criteria do not address the overall width and depth of patient support surfaces because of the diverse shape and size of these surfaces....
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  Using the Tape Measure
  
A tape measure is used to measure the length, width, height, and depth of various elements including parking spaces and access aisles, routes, thresholds, doorways, and protruding objects...
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  11B-408.4.1 Car dimensions and doors
  
Elevator cars shall provide a clear width 42 inches (1067 mm) minimum and a clear depth 54 inches (1372 mm) minimum....
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  4.17.3 SIZE AND ARRANGEMENT
  
Toilet stalls with a minimum depth of 56 in (1420 mm) (see Fig. 30(a)) shall have wall-mounted water closets....
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  305.7.2 Parallel Approach
  
Alcoves shall be 60 inches (1525 mm) wide minimum where the depth exceeds 15 inches (380 mm). Figure 305.7.2 Maneuvering Clearance in an Alcove, Parallel Approach...
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  305.7.1 Forward Approach
  
Alcoves shall be 36 inches (915 mm) wide minimum where the depth exceeds 24 inches (610 mm). Figure 305.7.1 Maneuvering Clearance in an Alcove, Forward Approach...
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  R404.7.1 Forward Approach
  
The clear space and additional maneuvering space shall be 915 mm (3.0 ft) wide minimum where the depth exceeds 610 mm (2.0 ft)....
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  R404.7.2 Parallel Approach
  
The clear space and additional maneuvering space shall be 1525 mm (5.0 ft) wide minimum where the depth exceeds 380 mm (1.25 ft)....
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  4.34.6.5(3)
  
(3) The depth of a sink bowl shall be no greater than 6-1/2 in (165 mm). Only one bowl of double- or triple-bowl sinks needs to meet this requirement....
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  Side Entry: ADA Standard Section 1002.4.4.2
  
For example, where a 42 inch (1065 mm) opening is provided, a minimum clear space of 60 inches (1525 mm) in length and 36 inches (915mm) in depth is needed to ensure adequate space for maneuvering...
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  11B-1002.4.4.2 Side entry
  
For example, where a 42 inch (1065 mm) opening is provided, a minimum clear space of 60 inches (1525 mm) in length and 36 inches (915mm) in depth is needed to ensure adequate space for maneuvering...
 - EZ-ACCESS Transitions® Angled Entry Ramp
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  11B-305.7.2 Parallel approach
  
Alcoves shall be 60 inches (1524 mm) wide minimum where the depth exceeds 15 inches (381 mm). FIGURE 11B-305.7.2 MANEUVERING CLEARANCE IN AN ALCOVE, PARALLEL APPROACH...
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  11B-305.7.1 Forward approach
  
Alcoves shall be 36 inches (914 mm) wide minimum where the depth exceeds 24 inches (610 mm). FIGURE 11B-305.7.1 MANEUVERING CLEARANCE IN AN ALCOVE, FORWARD APPROACH...
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  Water Closet Clear Floor Space in Toilet Compartments
  
Many comments urged the Board to increase this depth so that at least 48 inches is provided in front of the water closet. Others recommended an overall depth of 78 inches. Response....
 - Stryker Evacuation Chair 6253
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  Door Maneuvering Clearance
  
At doors that provide a latch side approach, the minimum depth of this clearance is increased where a closer is provided because additional space is needed to counteract the force of closers...