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1:12 slope ratio (ADA Recommended) means that for every inch of rise, you will need one foot of ramp. As an example, a 12 inch rise would require a 12 foot ramp to achieve a 1:12 ratio.
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Read More »To determine the length of ramp for your application, you need to determine the rise. The rise is the vertical measurement between the ground and where the top of the ramp is going to be. Disability Systems recommends a 1:12 slope on most applications. Residential applications can use a 2:12 slope ratio if space is an issue but only if an assistant is present to help push the wheelchair or to help a person walking on the ramp. For commercial public access, a 1:12 ratio is required, check your local codes. 1:12 slope ratio (ADA Recommended) means that for every inch of rise, you will need one foot of ramp. As an example, a 12 inch rise would require a 12 foot ramp to achieve a 1:12 ratio. 2:12 slope ratio means that for every two inches of rise, you would need one foot of ramp. As an example, take the total amount of rise in inches and divide by 2. If you have a 12 inch rise divide by 2 and the resulting number would be 6, this is the length of ramp which is required in feet to achieve a 2:12 ratio. 3:12 slope ratio means that for every three inches of rise you would need one foot of ramp. As an example, take the total amount of rise in inches and divide by 3. If you have a 12 inch rise divide by 3 and the resulting number would be 4, this is the length of ramp which is required in feet to achieve a 3:12 ratio. This slope ratio is only used to move an unoccupied wheelchair, never an occupied wheelchair and should never be used for walking.
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Read More »Calculating The Ramp's Slope 1, the gradient of wheelchair ramps with lengths of over 1,900 milimetres should not exceed 1:14 and should not be less than 1:10. This slope ratio indicates that for every 14 metres across the length of the ramp, the slope height increases or decreases by 1 metre.
In Australia, certain laws and regulations have been implemented to ensure that public ramps follow certain specifications. These aim to protect the safety of the people while providing them with better access to areas that are open to the public. One of the specifications covered by these regulations is the gradient or slope of a ramp. Regulating the steepness of wheelchair and accessibility ramps helps ensure that these pathways can be easily and safely used by those who have mobility issues.
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