Ramp Sizing Guide

1. Select your step height from the left hand column.
2. Using the key below estimate what gradient is most suitable.
3. Follow the chart to the bottom, length of ramp required is shown in red.

Gradient Key:

1:15 Gradient - Public Access
1:12 Gradient - Recommended for unassisted wheelchair access
1:6 Gradient - For manual and power chairs with assistance
1:4 For loading and unloading unoccupied chairs and scooters.

Step Height

Gradient

3" / 76mm

1:8

1:9

1:11

1:12

1:13

1:15

1:18

1:20

1:22

1:24

1:26

1:28

1:34

4" / 102mm

1:6

1:7

1:8

1:9

1:10

1:11

1:13

1:15

1:16

1:18

1:19

1:21

1:25

5" / 127mm

1:5

1:6

1:6

1:7

1:8

1:9

1:11

1:12

1:13

1:14

1:16

1:17

1:20

6" / 152mm

1:4

1:5

1:5

1:6

1:7

1:8

1:9

1:10

1:11

1:12

1:13

1:14

1:17

7" / 178 mm

1:4

1:5

1:5

1:6

1:7

1:8

1:9

1:9

1:10

1:11

1:12

1:15

8" / 203mm

1:4

1:4

1:5

1:6

1:7

1:8

1:8

1:9

1:10

1:11

1:13

9" / 229mm

1:4

1:5

1:6

1:7

1:7

1:8

1:8

1:9

1:11

10" / 254mm

1:5

1:5

1:6

1:7

1:7

1:7

1:8

1:10

11" / 279mm

1:4

1:5

1:5

1:6

1:7

1:7

1:8

1:9

12" / 305mm

1:4

1:5

1:6

1:6

1:6

1:7

1:8

13" / 330mm

1:4

1:5

1:5

1:6

1:6

1:7

1:8

14" / 356mm

1:4

1:5

1:5

1:6

1:6

1:7

15" / 381mm

1:4

1:4

1:5

1:5

1:6

1:7

16" / 406mm

1:4

1:4

1:5

1:5

1:6

18" / 457mm

1:4

1:4

1:5

1:6

Length of Ramp Required (mm)

610

710

810

925

1015

1170

1370

1525

1680

1830

1980

2135

2590

* To be used as a guide only *