Residential Wheelchair Ramps Servicing the East Bay to Marin County

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Where Ramps and Curb Ramps are Required. [ §303.4] Ramps and curb ramps are required along accessible routes to span changes in level greater than ½". Elevators and, under certain specified conditions, platform lifts, can be used as an alternative. Portions of accessible routes with running slopes steeper than 5% also must be treated as ramps.

How to build a wheelchair ramp

To determine the percent of grade: divide rise by the run of ramp. Run is not the length of the ramp. The distance horizontally (not along the slope) from the top of the ramp to the bottom. (eg: 6" rise / 52" ramp run = .115 or 11.5% grade) Green blocks represent rise/run combinations that meet building codes and accessibility guidelines.

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A 5′ x 5′ (minimum) resting platform is needed every 30 feet of ramp. + 5′ platforms. A 5′ x 5′ (minimum) platform is needed at the top of the ramp if there is not an existing one already. 1:12 Slope: For every inch of height from the ground, you need 1 foot of ramp length to achieve a 4.8° incline.

How to build a wheelchair ramp

For example, a slope of 1:12 means that for every dimensional unit of height (usually inches), the slope projects 12 units (inches). Although other slope ratios may be used for constructing your ramp, the American With Disabilities Act (ADA) recommends a 1:12 slope. For example, if your porch height is 24 inches off the ground, you'll need a 24.

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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.

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Slopes can be looked at in a few different ways. The ratio of rise to run - if a ramp is five inches high (rise) and five inches long (run) the slope is 5:5. Percentage - X units of the rise to 100 units of the run, example: 40 inches of the rise over 100 inches of the run is 40 percent slope. Degrees - the inverse tangent of the rise.

Wheelchair Ramp Guide

This guideline is to ensure the slope of the ramp is not too steep for safe passage. National Ramp recommends no greater than a 1:8 pitch, and only for users in a power wheelchair or manual wheelchair being pushed up the ramp. Resting platforms of 4'x5' or 5'x5' should be included for every ramp run longer than 30'.

Residential Wheelchair Ramps Servicing the East Bay to Marin County

The recommended rise to ADA ramp slope ratio is 1:12. This means that for every 1 inch of rise, 12 inches of ramp are required. Or, for every 1 inch of rise, you need 1 foot of ramp. For example, if the steps to an entryway is 24 inches high, you will need a ramp that is at least 24 feet long.

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Determining the length of a ramp is not complicated. Determining Ramp Length: Measure total rise (how many inches from lower level to upper level) and divide by the slope. 4.8-degree: Rise distance divided by 1. 7-degree: Rise distance divided by 1.5. 10-degree: Rise distance divided by 2. 12-degree: Rise distance divided by 2.4.

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The ADA provides good direction about ratios for wheelchair ramp slopes. The commercial and public facility standard for slope is 1:12 (in inches) or about 5 degrees of incline. For those building ramps at home, the ratio can be as steep as 3:12 or almost 15 degrees.

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The purpose of this protection is to prevent a wheelchair or crutch tip from slipping off the edge of the ramp. There are two ways that you do this. ADA Handrails should be 12 inches from the edge of the ramp (don't forget to keep the 36-inch clear width). The 12 inches are measured from the edge of the ramp to the inside of the handrail.

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To build a ramp for a wheelchair: Keep at least a width of 91.5 cm (36 inches). Measure the vertical length you want to cover. Consider the slope ratio requirement your local regulations demand. For example, ADA requires a minimum slope of 1:20 and a maximum of 1:12.

Wheelchair Ramp Slope Chart & Percent of Grade Formula

The maximum allowable ramp slope for a wheelchair ramp is one that allows you to safely navigate the ramp without any additional assistance. Most ramps are built at 1:12 or a 20% slope, but some can be steeper depending on the type of equipment used to build it and where it's being built. For every 1" rise, there must be a ramp that is at least.

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According to the Americans with Disabilities Act (ADA) guidelines, the recommended maximum slope for a wheelchair ramp is 1:12, which means that for every inch of vertical rise, there should be at least 12 inches of ramp length. This slope provides a gentle incline that allows for easy and safe ascent and descent.

Wheelchair Assistance How to build a wheelchair ramps

Maximum slope for hand-propelled wheelchair ramps should be 1" of rise to every 12" of length (4.8 degree angle; 8.3% grade). Maximum slope for power chairs should be 1.5" rise to 12" length (7.1 degree angle; 12.5% grade). Minimum width should be 36" (inside rails) - (48" is ideal). The "deck" or surface of the ramp should be set down between.

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The Commercial Occupied Use ratio of 1:12 is the most commonly recommended slope for wheelchair ramps, however in private residences the slope can be smaller to accommodate for older construction and tighter spaces. The 1:12 slope ratio means that every one inch of vertical rise requires at least one foot (12") of ramp length.