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ADA ramp slope percentage

Americans with Disabilities Act Ramp Slope HandiRam

  1. The ADA requires that all business and public use wheelchair ramps adhere to a 1:12 slope ratio, meaning that for every inch of vertical rise there must be 12 horizontal inches (one foot) of ramp. If, for example, you had a stairway with a vertical rise of 21″, you would need 21′ of ramp
  2. And that's it - our ADA ramp slope calculator will show you your results: slope: 3.58° (6.25 %) run: 46.67 ft. ramp length: 46.67 ft. useful info for two ramp runs construction: For two ramps of equal length, each should be 23.38 ft long. Of course, you can split it differently, depending on the space available
  3. ADA Ramp Specifications Require a 1:12 ramp slope ratio which equals 4.8 degrees slope or one foot of wheelchair ramp for each inch of rise. For instance, a 30 inch rise requires a 30 foot handicap wheelchair ramp. ADA Guidelines Require a Minimum 5' x 5' Flat, unobstructed area at the top and bottom of the ramp
  4. of the ramp run must not exceed 8.33 percent. For alterations (when the curb ramp was altered after January 26, 1991), the slope must not exceed 10 percent for a 6-inch rise or 12.5 percent for a 3-inch rise. 3 [§ 4.3.7] The cross slope of the curb ramp is perpendicular to the running slope. Unlike the running slope, which runs along the ramp.
  5. The cross slope of ramp surfaces shall be no greater than 1:50. Ramp surfaces shall comply with 4.5. 4.8.7 Edge Protection Ramps and landings with drop-offs shall have curbs, walls, railings, or projecting surfaces that prevent people from slipping off the ramp
  6. Select the incline you desire. Refer to your equipment's user guide for exact recommendations concerning acceptable usage and allowable slope. We start you off with the ADA Standard Ratio of 1:12, but we recommend you refer to your equipment's user guide for exact recommendations concerning acceptable usage and allowable slope

The preferred slope for a building access ramp is 1:12 or 1 inch of rise per 12 inches of horizontal run - that's roughly an 8% slope also written as a 4.8 degree angle slope. While you will see ramps at steeper slopes including the range of 0° to 18° of slope in the illustration shown here and ramps with slopes as steep as 20° in older texts Recommended Ramp Slope . While the maximum slope allowed by ADA guidelines is 1:12, the ADA recommends a more gradual slope of 1:16 to 1:20, whenever possible. A 1:12 ratio is too steep for some people to navigate, and a lower slope may be required for some public buildings Wheelchair Ramp Slope and Percent of Grade Information Percent of Grade Formula. 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

of the ramp run must not exceed 8.33 percent. For alterations (when the curb ramp was altered after January 26, 1991), the slope must not exceed 10 percent for a 6-inch rise or 12.5 percent for a 3-inch rise The maximum slope allowed for any ramp that provides access for elderly voters and voters with disabilities is 8.33 percent. (CCR, Section 11B-405.2.) The percent of slope is determined by dividing the number of inches of vertical rise (height) for each 12 inches of horizontal run (length) For example, a 36-inch rise over a length of 100 inches is a 36 percent slope. Slope can also be expressed in degrees, a measurement of the inverse tangent of the rise divided by the run relative to horizontal. Let's keep this easy and mostly talk about simple ratios for ramp slopes. Calculating Wheelchair Ramp Slope 1:12 Slope: For every inch of height from the ground, you need 1 foot of ramp length. Minimum number of resting platforms: A 5′ x 5′ (minimum) resting platform is needed every 30 feet of ramp. + 5′: A 5′ x 5′ (minimum) platform is needed at the top of the ramp if there is not an existing one already The ADA limits curb ramp steepness to no greater than 1:12 (an 8.33% slope), a width of 36 inches, and adjacent counter slopes of no steeper than 1:20. If curb ramp flares are used, they cannot be steeper than 1:10. Also, curb ramps and flared sides cannot project into parking spaces, parking access aisles, or vehicular traffic lanes

An ADA curb ramp must have no more than a 1:12 ratio, or no greater than a 8.33% slope. The ADA also requires slopes to be consistent from end to end; a ramp must have a uniform slope. There are only a few exceptions to this rule, which are dependent on building materials. Cross-sloped ramps are the only other exception. The maximum ratio for. For commercial use when somebody is sitting in the wheelchair or scooter while it climbs the ramp, ADA recommends a 1:12 slope, which means that every 1 of vertical rise requires at least 1' (12) of ramp length (5 degrees of incline). Example: A 24 rise requires a minimum ramp length of 24' (288) (24 divided by 1) In addition to specifying the maximum ramp slope in the direction of travel, Chapter 4.8 of the ADA specifies the maximum permissible cross slope. This is the slope across the width of the ramp,..

How Long Should a Wheelchair Ramp Be?

First, note that the slope is always 4.8 degrees when using this option. Based on the measurement you provide for the ramp rise (i.e. the total height of the steps), the ramp calculator works out the distances for the ramp length and run 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 2 405 Ramps. 405.1 General. Ramps on accessible routes shall comply with 405. EXCEPTION: In assembly areas, aisle ramps adjacent to seating and not serving elements required to be on an accessible route shall not be required to comply with 405. 405.2 Slope. Ramp runs shall have a running slope not steeper than 1:12

Ramp Calculator. ADA Ramp Standards & More

ADA Guidelines, ADA Ramp Slope, ADA Compliant handicap

1:12 sloped ramps are the maximum slope allowed by ADA codes and they require handrails. Federal ADA codes indicate that the maximum cross-slope of an accessible route is 1:48, which is slightly more than 2%. However, we have seen some jurisdictions that allow a maximum cross slope of 1:50 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 maximum allowable slope in any new construction is 1:12 with a maximum rise of 30 (76.2 cm) without a landing The Americans with Disabilities Act (ADA) requires a 1:12 slope ratio for commercial ramps (ramps used in public spaces). This means that for every 1 inch of rise, 12 inches of ramp are required. For example, if an entryway is 36 inches high, you will need a ramp that is at least 36 feet long. Also Know, how do you calculate the length of a ramp ADA Ramp Slope Requirements of a 1:12 handicap ramp slope ratio which works out to be one foot of ramp for each inch of rise. For instance, handicap ramp specifications require a 20 foot ADA ramp for a 20 inch rise ADA Ramp Slope. The ADA ramp slope must be no steeper than 1:12 (1 inch of vertical rise to 12 inches of ramp length.) The Americans with Disabilities Act states that this criteria must be met for any wheelchair ramp that is used by the public. For example, suppose the vertical rise is 10. To calculate the ADA-required ramp length, multiply.

The specific figures laid out in the official ADA ramp slope requirements are there for a reason. The ramp must have a 1:12 slope ratio. This means that there must be a one-inch rise in the ramp for every corresponding 12 inches of the ramp. Minimum width of 36 inches, although this can be higher in certain states.. The ADA requirements are summarized here: ADA standards require a 1:12 ramp slope ratio which equals 4.8 degrees slope or one foot of wheelchair ramp for each inch of rise. For instance, a 30 inch rise requires a 30 foot handicap wheelchair ramp. ADA standards require a minimum 5' x 5' Flat, unobstructed area at the top and bottom of the ramp What does ADA consider a ramp to be? A ramp is any part of an accessible route with a slope greater than 1:20. Handicap Ramp Slope. Slope represents the proportion of vertical rise to the horizontal length of ramp required and is specified in the Standards as a ratio (e.g., 1:12). (Every inch of rise needs 12 inches of ramp) Non-compliance can sometimes occur for other reasons. For example, a wheelchair ramp that has an as-constructed slope of 8.5 percent due to normal construction tolerances is non- compliant because this slope slightly exceeds the maximum 1V:12H slope (8.3 percent) given in ADA design standards • Curb Ramp runs shall have a running slope between 5 percent minimum and 8.33 percent maximum but shall not require the ramp length to exceed 15.0 feet. Exception: 15 Foot Rule: The running slope for a curb ramp is not limited to 8.33 percent maximum if the constructed curb ramp length exceeds 15 feet in length

Door Landing Slope & (see Diagram); Ground Slope Sc 1 St R

The Americans with Disabilities Act (ADA) requires a 1:12 slope ratio for commercial ramps (ramps used in public spaces). This means that for every 1 inch of rise, 12 inches of ramp are required. For example, if an entryway is 36 inches high, you will need a ramp that is at least 36 feet long 0.2 percent of the compliance slope value is deemed acceptable. For percent and the maximum ADA compliance value of the slope is known to be 2.0 percent. If all three of the measured slopes are 1.7 percent (1.5 percent + 0.2 percent [tool accuracy]) or less, contract and ADA compliance have been achieved While the ADA requirements only apply to commercial ramps, many home access professionals adhere to the 1:12 slope ratio for residential ramps as well. However, a slope ratio of 2:12 is also acceptable for residential ramps if space is limited. This means 12-inches of ramp for every 2-inches of rise and 9.5 degrees of incline

ADAAG should change their requirements so that the maximum sidewalk cross-slope is 3 percent and the minimum slope is 1.5 percent. Based on the research cited, the 3 percent maximum is reasonable. The Americans with Disabilities Act (ADA) covers nearly everything to do with disabilities and mobility issues. There are specific guidelines for wheelchair ramps. First, wheelchair ramps must have a 1:12 ramp slope ratio for wheelchairs. This means that each foot of the ramp must have 4.8 degrees of slope for every inch it is rising

Any running slope over 1:20 or 5 percent is treated as a ramp with handrails and landings. 2. Within the play area, the safety surfacing must comply with ASTM F 1292-99 or -04 Standard Specification for Impact Attenuation of Surface Systems Under and Around Playground Equipment when located within the use zone for proper impact attenuation allow for wheelchair access. Curb cuts should be at least 3 feet 4 inches wide at the base, with flared sides that do not exceed a slope of 2.33 percent and ramps that do not exceed a slope of 8.33 percent. The ramps should be flared smooth into the street surface. Ramps should be checked periodically t The ADA specifies that ramps used for accessing a building must have a slope of 1:12, which means that every inch of rise must have 12 inches of run. To illustrate, if the rise is 24 inches, the ramp must be 24 feet in length. The maximum rise is 30 inches, so no ramp or section of a ramp can exceed 30 feet percent. A metal measuring tape should be used to measure linear dimensions and should be The ADA Measuring Guidelines document is a dynamic document and is expected to measurements of the ramp cross slope • The minimum width of the curb ramp shall be 36 inches excluding flared sides. Parallel Curb Ramps • Curb ramps shall have a maximum slope of 1:12. The running slope of the curb ramp shall be in-line with the direction of sidewalk travel. The curb ramp run length shall not exceed 7 feet

GIFE ADA COMPLIANCE FOR SIDEWALK, CURB RAMPS, BLENDED TRANSITIONS ,AND PEDESTRIAN FACILITIES SECTION 22 Rev. 05-18-20 22-3 clear. Forms should be checked prior to pour to ensure maximum slopes are not exceeded and minimum dimensions are met. 3. There is no construction tolerance for running slope. The maximum ramp running slope is 8.33% This video briefly explains what a ramp is as defined by typical building codes and accessibility guidelines. It also notes typical requirements for a ramp.. Ramp Running Slope. The maximum running slope of a ramp run cannot exceed a ratio of 1:12. Basically 8.33%. Any ramp having a slope steeper than this is not considered an accessible ramp and cannot be used as part of an accessible route. There is a minimum slope of a ramp as well. Basically in order to be considered a ramp it must have a slope. ADA compliant parking stalls should be a minimum of 36 inches wide and 60 inches long. Curb ramps should also be ADA compliant and have a slope of no more than an eight percent grade. ADA compliant parking spaces must have access aisles for an ADA compliant passenger vehicle space. Furthermore, ADA-compliant parking spaces cannot be located.

All ramps within the project limits are ADA compliant. -General requirements for all ramps are: Ramps are present where sidewalks exist. - The ramp width is the same width as the sidewalk. - The ramp is not less than 36 wide at the bottom. -Cross slope of ramp is 2.0% or less. - Running slope of ramp is 8.33% or less and oriented to path of. Slope requirements: For a ramp that provides handicap access, is used as an exit or is in the path of travel, the maximum slope under the ADA requirements is a 1-foot rise in 12 feet of horizontal run. For an existing ramp, the slope cannot exceed a 1-foot rise to 8 feet of horizontal run Slope Requirements; According to the ADA, ramps may not have a slope exceeding a ratio of 1:12. However, ADA guidelines best recommend a slope between 1:16 and 1:20 when possible. Cross slopes must be less than 1:50. Handrails; If a ramp rises higher than six inches or has a larger length than 72 inches, it must have handrails on both sides A pedestrian could, however the vast majority of ramps constructed in the UK are designed for all scopes. This includes the wheelchair users, disabled, persons with limited mobility conditions, elderly and for everybody using the ramps to enter a.

slope percentage finder Wheelchair Ramp GraphicCalculating Slope and Common Slopes in Architecture

The Americans with Disabilities Act (ADA) requires a 1:12 slope ratio for commercial ramps (ramps used in public spaces). This means that for every 1 inch of rise, 12 inches of ramp are required. How much does it cost to build a ramp? Handicap Ramp Material Prices Per Linear Foo Mechanical ramps can be used in large public buildings but are not recommended for use by persons with physical impairments. If the ramp is to be used by a wheelchair-confined person, the slope. The Americans with Disabilities Act provides guidelines for wheelchair ramps in order to ensure they are as accessible as possible. According to the ADA, a wheelchair ramp must have a slope of 1:12. This means that for a 30 inch rise, the ramp would need to be 30 feet long Max Grade for Wheelchair Ramp: The ramp slope maximum is a 1:12 ratio: 12 inches of ramp for each inch of rise. Let's say you have two steps that total 12 inches in height. Using the 1:12 ratio, you'll need 12 feet of ramp to cover the 1 foot rise in total height for the two steps. For a single 6 inch step, a 6 foot ramp is recommended and.

• Ramp cross slope shall not exceed 2.0 percent (1:48) - Zero is best • Combined running slope and cross slope makes climbing ramps more difficult • Since ramp running slope is significant, cross-slope should be minimized 2% ma As a general rule when using portable wheelchair ramps most ramp manufacturers recommend a maximum slope no steeper than 1:12 for independent use and 1:8 for assisted use over shorter distances. A simple calculation for finding out ramp lengths is to multiple the height by the ratio. A super lightweight, portable wheelchair ramp with an amazing. Slope expressed as a percentage = (h/d) x 100. From this expression, we can solve for the unknown values of each term. An existing ramp of 1 meter in height with a horizontal distance of 10 meters. Wheelchair Ramp Slope Chart & Percent of Grade Formula. Saved by Anat Bergman Cohen. 118. Handicap Accessible Home Handicap Ramps Ada Bathroom Handicap Bathroom Disabled Bathroom Wheelchair Ramp Slope Ada Ramp Slope Shed Ramp Dog Ramp

It may seem impossible to meet the flatness required by the Americans with Disabilities Act's (ADA's) less than two percent (1:50) maximum slopes for random traffic floors, landings, walkways, sidewalks, curb ramps, entrances, exit ways, ramps, and intersections at walkways. 1 Fortunately, the new cross-slope for the 2010 edition is now. A road sign indicating a 6% grade, or 6% slope. A six percent slope means that the road elevation changes 6 feet for every 100 feet of horizontal distance (Figure 1.3). A road climbs at a gradient of 6 percent. The road gains 6 feet in elevation for every 100 feet of horizontal distance 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. A ramp needs to slope gently (meaning it has a slope of no more than 1 metre rise to every 12 metres of length) to make it safe and easy to use. A longer ramp with a gentler slope is best for someone who needs to be pushed in a wheelchair. Most ramps will need a small barrier along the edges to stop users slipping off. The ramp may also need a.

ADA Ramp - ADA Compliance - ADA Complianc

Specific guidelines for wheelchair ramps: A 1:12 slope ratio, which equals one foot of ramp for every inch of rise; a flat and unobstructed area measuring five feet by five feet at the top and bottom of the ramp; a width of 36 inches; handrails on both sides of the ramp that are 34 to 38 inches in height. ADA Complianc The calculator bases the results on a slope of 1 vertical inch for each 12 horizontal inches. This is often stated as a 1 in 12 slope and is considered a standard in accessibility ramps. With this information, the builder can determine the amount of materials needed and design the ramp. Wheelchair ramps are commonly built of wood, cement or metal

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 We will send all correspondence by email if you provide an address. Please consider the environment and help us operate in the green. To contact us: Phone: 512-787-3687 or 512-557-1676. Fax: 866-268-1810. Aquatic Wheelchair Here are the ADA wheelchair ramp requirements for most businesses, schools and other organizations, per ADAWheelChairRamps.com: - ADA Standards Require a 1:12 ramp slope ratio which equals 4.8 degrees slope or one foot of wheelchair ramp for each inch of rise. For instance, a 30-inch rise requires a 30-foot handicap wheelchair ramp

Ramp Incline Calculator ADA Ramp Slope Wheelchair Ramp

• The Americans with Disabilities Act slope shall be 5% percent maximum. ADA Ramps • 12:1 (8.3%) max. Bottom of Ramps • Maximum 11% difference in grades • Diagonal ramps (Type B or E) must have a 4' flat landing at the bottom so user can reorient Slopes 32. Minimum slope for parking areas (1.5 to 5.0) 1.5% 1.5:100 Minimum slope for drainage away from buildings (grade slope 2.0 to 50) Maximum permissible cross slope for ADA walkway/ramp. Maximum slope for ADA parking space. 2% ~1/4 in/ft. 1:50. 1 foot height change over 50 feet. Maximum desirable slope of a grassy (outdoor) area used for recreation. For commercial use when somebody is sitting in the wheelchair or scooter while it climbs the ramp, ADA recommends a 1:12 slope, which means that every 1 of vertical rise requires at least 1' (12) of ramp length (5 degrees of incline). Example: A 24 rise requires a minimum ramp length of 24' (288) (24 divided by 1) Ramps typically occur on an accessible route leading to a facility or otherwise separated from the street. The cross slope for all ramps is to be 1%, but a maximum of 2.0% is allowed by ADA standards. Although the maximum running slope of a ramp in new construction is 1V:12H (8.33%), as discussed before, all sidewalks are to be designed with.

Non-compliance can sometimes occur for other reasons. For example, a wheelchair ramp that has an as-constructed slope of 8.5 percent due to normal construction tolerances is non­ compliant because this slope slightly exceeds the maximum lV:12H slope (8.3 percent) given in ADA design standards 4.1.6 (3) (a) Ramps. Note: This document, portion of document or referenced document was published prior to the 2010 ADA Standards, and is still applicable. (a) Ramps: Curb ramps and interior or exterior ramps to be constructed on sites or in existing buildings or facilities where space limitations prohibit the use of a 1:12 slope or less may. the slope of the ramp. Extend texture the full width and length of the curb ramp including flared side ramps. 6. Modify construction details to adapt dimensions to existing curb heights where the curb is less than the standard 8 height. 7. Curb ramp and side flare lengths are variable and based on curb height and the sidewalk slope. 8

Building Access Ramp Slope or Pitch Requirements - Ramp

Ramps less than 6″ high do not require handrails. The second way is to keep the slope less than 1:20 or 5%. With a slope less than 5% it is not considered a ramp and therefore does not need handrails. This creates a long ramp but it comes in handy when you have the space and want to avoid the handrail aesthetic In wading pools, sloped entry and landings must extend to deepest part of pool. Per Section 405.7, ramps shall have landings at the top and the bottom of each ramp run and landing clear width shall be at least as wide as the ramp run and 60 in clear length. Handrails: Handrails must be provided on both sides of sloped entry The ADA defines a ramp as a sloping route with a slope ratio greater than 1:20, or one inch of vertical rise for every 20 inches of horizontal length, and less than 1:12. These specifications make sure that ramps are not too steep According to the ADA, ADA ramp specifications require a 1:12 ramp slope ratio which equals 4.8 degrees slope or one foot of wheelchair ramp for each inch of rise. For instance, a 30 inch rise requires a 30 foot ramp. ADA guidelines require a minimum 5′ x 5′ flat, unobstructed area at the top and bottom of the ramp The accessibility of access ramps is affected by their slope, which is often described by a ratio, a:b, indicating a rise of a inches for every b inches in run. Table 1 summarizes common slopes in terms of rise:run, percentage gradient, and angle. The Americans with Disabilities Act Accessibility Guidelines (ADAAG) for Transportation Vehicles.

ADA Wheelchair Ramp Requirement

Measuring slope - Slope is calculated by calculating the ratio of vertical rise to horizontal run. For example, if a ramp 6 IN in vertical height traverses a horizontal distance of 6 FT (72 IN) then the slope is 6 / 72 = 1 / 12 = 0.083 (8.3%). Typically the maximum allowable slope for a ramp is written as 1:12 Ramp Length ADA Recommended. Recommended Length (1:12 slope): ft ramp. Ramp Length For Residential. Occupied Ramp Length (2:12 slope): (Ramp length needed if the wheelchair / scooter is in use with the aid of an able assistant) ft ramp. Unoccupied Ramp Length (3:12 slope): (Ramp length needed for loading and unloading unoccupied chairs and.

Wheelchair Ramp Slope Chart & Percent of Grade Formul

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 Dakota Wheelchair Ramps LLC (701-205-6673) rents, sells, and installs gently used aluminum ramps for less.These ramps can meet all of the Americans with Disabilities Act (ADA) requirements for width of ramp, slope, slip resistance, and hand rails.The ADA says that a ramp needs: A slope not to exceed 1:12 (Every inch of rise needs 12 inches of ramp New query. §3232. Ramps. (a) General. Any path of travel shall be considered a ramp if its slope is greater than 1 foot rise in 20 feet of horizontal run. (Title 24, Part 2, Section 2-3306 (a) without Note.) (b) Width. The width of ramps shall be as required for exits. EXCEPTION: Existing ramps may have width as required for stairways 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 A critical factor when designing or building a wheelchair ramp is slope - the ratio between the rise (vertical measurement) and run (horizontal measurement). In a residential setting, a ramp must have a slope of 1:10, that is, for every inch (or centimetre) of vertical height, there will be 10 inches (or centimetres) of horizontal distance

News from Moore County Planning & Community DevelopmentHow to calculate slopes and gradients | First In ArchitectureChoice of Vertical Transportation You Can Have in a HomeADA - Ramp for Accessible Parking | CSE for Landscape

Now, on to ADA guidelines. For commercial occupied use, the Americans with Disabilities Act (ADA) recommends a 1:12 slope. This means that every 1 of the vertical rise needs at least 1' (12) of ramp length. This equates to 5 degrees of incline. For more ADA guidelines, click the link above The famously hated 12-inch Grooved Border. Here is the code as it stands today. But on July 1, 2015 this requirement goes away. 11B-406.5.11 Reserved. Grooved border. Curb ramps shall have a grooved border 12 inches (305 mm) wide along the top of the curb ramp at the level surface of the top landing and at the outside edges of the flared. The ADA allows a tolerance of 1/4-inch in 10 feet when evaluating existing facilities impacted by an alteration or maintenance project . This calculates to 0.2 percent. For example, if the cross slope of an existing ramp was measured at 2.2 percent, the cross slope would be considered compliant because it is within the construction tolerance level What is Ada slope requirements? Slope is the ratio of the height of a ramp to its length. An ADA curb ramp must have no more than a 1:12 ratio, or no greater than a 8.33% slope. The ADA also requires slopes to be consistent from end to end; a ramp must have a uniform slope