Ramp Slopes

Multiple elevation drawings comparing ramp slopes based on incline and run lengths

A ramp is comprised of horizontal sloped runs connected by level landings between runs. Any slope greater than 1:20 and less than 1:12 along an accessible route shall be considered a ramp that is required to comply with ADA accessibility codes and compliances. The least possible slope should be used whenever possible.

The maximum allowable slope in any new construction is 1:12 with a maximum rise of 30” (76.2 cm) without a landing. A ramp with a slope between 1:12 and 1:16 can have a maximum horizontal length of 30’ (9.14 m) without a landing. A ramp with a slope between 1:16 and 1:20 can have a horizontal run up to 40’ (12.19 m) before requiring a landing.

ADA accessible ramps must maintain a minimum clear width of 36” (91.4 cm) at all times. The cross slope along the width of any ramp must be less than 1:50 or <2%. The 36” (91.4 cm) clear width must be maintained between all including handrails.

What is the maximum allowable slope for an ADA accessible ramp?
The maximum allowable slope in any new construction is 1:12 with a maximum rise of 30” (76.2 cm) and a maximum horizontal run without a landing of 30’ (9.14 m).
How far can a ramp go without a landing?
A ramp with a slope between 1:12 and 1:16 can have a maximum horizontal length of 30’ (9.14 m) without a landing. A ramp with a slope between 1:16 and 1:20 can have a horizontal run up to 40’ (12.19 m) before requiring a landing.
What is the minimum slope of a ramp?
Any slope greater than 1:20 and less than 1:12 along an accessible route shall be considered a ramp that is required to comply with ADA accessibility compliances.
3D model of Ramp Slopes viewed in perspective

Details

*Under Development*

Height:
30” | 76.2 cm (Max)
Width:
Depth:
Length:
30'-40' | 9.14-12.19 m (Max)
:
:
Weight:
Area:
:

Maximum Slope: 1:12
Minimum Slope: >1:20
Maximum Rise: 30” | 76.2 cm
Maximum Horizontal Run (1:12-1:16): 30’ | 9.14 m
Maximum Horizontal Run (1:16-1:20): 40’ | 12.19 m

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Properties

Drawings include:
Ramp Slopes side elevation (detail), side (runs)

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Ramps are inclined surfaces that join different levels of a space. Commonly used at the entrances of buildings to accommodate level changes, ramps provide building access to wheelchair users. The maximum slope of a ramp is calculated to provide comfortable and easy access to the building.

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30” | 76.2 cm (Max)
30'-40' | 9.14-12.19 m (Max)
Ramp Slopes
76.200
1219.000
3800
https://p3d.in/e/DyDAX
GUIDE
3D
Ramp Slopes3D model of Ramp Slopes viewed in perspective3D model of Ramp Slopes viewed in perspective
4’ | 122 cm (Overall)
44” | 111.7 cm
18.7’ | 5.7 m (Total)
Ramp Handrails - Utility
122.000
111.700
570.000
1900
https://p3d.in/e/XzmYg
GUIDE
3D
Ramp Handrails - Utility3D model of Ramp Handrails (Utility) viewed in perspective3D model of Ramp Handrails (Utility) viewed in perspective
4.17’ | 127 cm (Overall)
49.5” | 125.7 cm
22.33’ | 6.81 m (Total)
Ramp Handrails - Wall
127.000
125.700
681.000
1900
https://p3d.in/e/zN4LY
GUIDE
3D
Ramp Handrails - WallView of Ramp Handrails (Wall) in 3D available for downloadView of Ramp Handrails (Wall) in 3D available for download
4.5’ | 137 cm (Overall)
45” | 114.3 cm
18.5’ | 5.64 m (Total)
Ramp Handrails - Vertical
137.000
114.300
564.000
1900
https://p3d.in/e/fojl6
GUIDE
3D
Ramp Handrails - VerticalPerspective view of a 3D model of Ramp Handrails (Vertical)Perspective view of a 3D model of Ramp Handrails (Vertical)
24” | 61 cm
7’ | 2.13 m (Overall)
38’ | 11.6 m (Total)
Ramp - Switchback
61.000
213.000
1160.000
420
https://p3d.in/e/pFlVK
GUIDE
3D
Ramp - Switchback3D model of Ramp (Switchback) viewed in perspective3D model of Ramp (Switchback) viewed in perspective
12” | 30.5 cm
36” | 91.4 cm
17’ | 5.18 m
Ramp - Straight
30.500
91.400
518.000
20
https://p3d.in/e/VfZkN
GUIDE
3D
Ramp - StraightView of Ramp (Straight) in 3D available for downloadView of Ramp (Straight) in 3D available for download
24” | 61 cm
17’ | 5.18 m (Overall)
36’ | 11 m (Total)
Ramp - Turning
61.000
518.000
1100.000
20
https://p3d.in/e/iUWGA
GUIDE
3D
Ramp - TurningPerspective view of a 3D model of Ramp (Turning)Perspective view of a 3D model of Ramp (Turning)