A landing at least 36” long at the top of curb ramps provides room to approach or exit ramps and turn without encountering compound slopes of flared sides....
Search Results "Built-Up Curb Ramp"
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  Why is a top landing required at curb ramps if side flares are provided?
  
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  DSA Drawing 11B-406-5 Perpendicular Curb Ramp next to a Curb and Gutter (2016 CBC)
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  406.4 Landings
  Landings shall be provided at the tops of curb ramps. The landing clear length shall be 36 inches (915 mm) minimum.... 
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  406.4 Landings
  Landings shall be provided at the tops of curb ramps. The landing clear length shall be 36 inches (915 mm) minimum.... 
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  11B-406.5.10 Diagonal curb ramps
  Diagonal or corner type curb ramps with returned curbs or other well-defined edges shall have the edges parallel to the direction of pedestrian flow.... 
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  406.4 Landings
  Landings shall be provided at the tops of curb ramps. The landing clear length shall be 36 inches (915 mm) minimum.... 
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  11B-406.3.2 Turning space
  A turning space 48 inches (1219 mm) minimum by 48 inches (1219 mm) minimum shall be provided at the bottom of the curb ramp.... 
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  11B-406.3.2 Turning space
  A turning space 48 inches (1219 mm) minimum by 48 inches (1219 mm) minimum shall be provided at the bottom of the curb ramp.... 
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  11B-406.5.10 Diagonal curb ramps
  Diagonal or corner type curb ramps with returned curbs or other well-defined edges shall have the edges parallel to the direction of pedestrian flow.... 
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  Slope: ADA Standard Section 405.2
  Section 405.2 covers the current ADA Standards for slope requirements on ramps. 
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  11B-502.4 Floor or ground surfaces
  Built-up curb ramps are not permitted to project into access aisles and parking spaces because they would create slopes greater than 1:48. ◼ Advisory 11B-502.4 Floor or ground surfaces... 
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  Q3: Roadway Resurfacing Alteration Project and Curb Ramp Improvements
  Q3: If a roadway resurfacing alteration project does not span the full width of the road, do I have to put in curb ramps?... 
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  Width [4.7.3] and Surface [4.7.4]
  The minimum clear width of a curb ramp is 36 inches, exclusive of flared sides.... 
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  DSA Drawing 11B-406-3 Perpendicular Curb Ramp next to a Curb and Gutter (2016 CBC)
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  Roadway resurfacing, curb ramps at crosswalks
  If roadways are being resurfaced or otherwise altered as part of a BRT project, curb ramps must be installed at crosswalks that have been affected. (DOT ADA Standard 106.5.)... 
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  11B-405.9.2 Curb or barrier
  A curb or barrier shall be provided that prevents the passage of a 4-inch (102 mm) diameter sphere, where any portion of the sphere is within 4 inches (102 mm) of the finish floor or ground... 
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  DSA Drawing 11B-406-11 Diagonal Curb Ramp next to a Curb and Gutter (2016 CBC)
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  7 [§ 4.7.8]
  7 [§ 4.7.8] Curb ramps must be located where they will not be obstructed by parked vehicles.... 
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  Top Landings
  Commenters advised that landings should be specified at the top of curb ramps. Response.... 
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  406.8--Modification to 406 of Appendix D to 36 CFR Part 1191
  406.8--Modification to 406 of Appendix D to 36 CFR Part 1191 A curb ramp shall have a detectable warning complying with 705.... 
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  1. Location
  Generally, you must provide curb ramps wherever a sidewalk or other pedestrian walkway crosses a curb. ... 
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  402 Accessible Routes
  Those portions of accessible routes that slope more than 1:20 must be treated as ramps or curb ramps. Comment.... 
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  DSA Drawing 11B-406-6 Perpendicular Curb Ramp with No Gutter (2016 CBC)
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