State of Minnesota Sample PowerPoint Template · 2019. 5. 16. · • Maximum length of initial ramp is 15 feet. • Slopes and dimensions are absolute. PROWAG allows no tolerances

ADA Operations Contact Info

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http://www.dot.state.mn.us/ada/construction.html

STANDARD PLANS

2019

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Module Overview

• PROWAG and Curb Ramp Basics

• Curb Ramp Standard Plan 5-297.250

• Curb Ramp Types

• Driveway Standard Plan 5-297.254

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Standard Plate 7036F

• Feb. 20 2004 Standard Plate 7036F

• Ramp are based on length & .08 Ft./Ft. or flatter

• Landings .02 Ft./Ft Max. (a relatively flat 4’x4’ landing to allow wheel chairs to navigate around pedestrian ramp).

Pedestrian Curb Ramp - Discontinued

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• PROWAG = Public Rights of Way Accessibility Guidelines• Minimum 4 foot wide Pedestrian Access Route (PAR) with a

maximum cross slope of 2% is required.• The PAR must be continuous and unobstructed. • The PAR shall connect accessible elements, spaces and

facilities.

In 2010 MNDOT Implements PROWAG

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• If longitudinal slope exceeds 5 percent, or there is a change in direction, landings must be provided on any pedestrian facility.

• Maximum ramp slope is 8.3 percent.• Maximum length of initial ramp is 15 feet.• Slopes and dimensions are absolute. PROWAG

allows no tolerances for exceeding these maximums.

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In 2010 MNDOT Implements PROWAG

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Standard Plate 7036G

• March 23 2011 7036G• 4 ft. by 4 ft. minimum

landing .02 Ft./Ft Max. for running and cross slope

• Ramp lengths depend on grades, .08 Ft./Ft. or flatter.

Pedestrian Curb Ramp - Discontinued

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Standard Plans

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Standard Plans

Sheet 1 of 6 • NOTES: Landings shall be located anywhere the pedestrian

access route changes direction, at the top of ramps that have running slopes greater than 5% , and if the approaching walk is inverse grade greater than 2%.

Landing

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access route changes direction, at the top of ramps that have running slopes greater than 5% , and if the approaching walk is inverse grade greater than 2%

Landing5%-8%

5%-8%

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access route changes direction, at the top of ramps that have running slopes greater than 5% , and if the approaching walk is inverse grade greater than 2%.

• Inverse grade pic

>2% >2%

Missing a landing!

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Sheet 1 of 6 Notes: Initial curb ramps landings shall be constructed within 15’ from the back of curb, with 6’ from the back of curb being the preferred distance.Secondary curb ramp landings are required for every 30” of vertical rise when longitudinal slope is greater than 5%

Initial Landing Within 15’ BOC

Secondary LandingEvery 30” of Vertical Rise

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Sheet 1 of 6

Notes: All grade breaks within the PAR shall be perpendicular to the path of travel. Thus both sides of a sloped walking surface must be equal in length. (Except as stated in Note 6 ).

3’3’

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Sheet 1 of 6

6 The grade break shall be perpendicular to the back of walk. This will ensure that the grade break is perpendicular to the direction of travel.

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Sheet 1 of 6

Notes: To ensure initial ramps and initial landings are properly constructed, landings shall be cast separately. Follow sidewalk reinforcement details on Sheet 6.

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- Ramp Slope Ranges- Landing Areas

- Curb Heights “X”

Standard Plans Legend 2017

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Sheet 1 of 6 Notes: Top of curb shall match proposed adjacent walk grade.When the boulevard is 4’ wide or less, the top of curb taper shall match the ramp slopes to reduce negative boulevard slopes from the top back of curb to the PAR.

4”4”6” 0”0” 6”

F F4’

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• Perpendicular ramp• Tiered perpendicular ramp• Parallel ramp• Fan ramp• Depressed corner• Diagonal ramp (not recommended)• One-way directional ramp• Combined directional ramp

Curb Ramp Types

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• Ramp is perpendicular to the curb line.

Perpendicular

Landing

S

Tiered Perpendicular

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• Used where the initial curb ramp cannot make up the elevation difference, so a secondary ramp is needed

F FS

Parallel

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• Ramp is parallel to the curb line.

• Landing occurs at the bottom of the ramp.

• Secondary landings at the top of the “S” slopes.

Landing SS

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Fan

Landing

• Note 8 7’ Min top radius grade break required to be constructible.

• Ramp slope is 5% Max.

Modified Fan

Landing

Note 2 4’ min. depth landing required across top of ramp.

O24’ min.

Typically used when Right-of-way is constrained.

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LandingS

S

Landing

Depressed Corner

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Separate landing pour is not required for Depressed Corner placement.

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Diagonal Ramp

Shall only be used after all other curb ramp types have been evaluated and deemed impractical.

Note 9 : Pave full walk width.

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Diagonal Ramp – Least Preferred

Standard Plans Sheet 2

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Combined Directional

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LandingS S

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Standard One Way Directional

• Note: 10 Front edge of detectable warning shall be set back 2’ maximum when adjacent to walkable surface and 5’ maximum when adjacent to non-walkable surface with one corner set 3” from back of curb.

Directional with Domes back of Curb

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Note: 13 The concrete walk shall be formed and constructed perpendicular to the back of curb. Maintain 3” between edge of domes and edge of concrete.

2% Max. Slope

Ramp

Directional Ramp Walkable Flare

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8%-10% SLOPE

2’ max.dome setback


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• Any vertical lip that occurs at the flow line shall not be greater than ¼”.

• Perpendicular and parallel ramps can have a maximum 5% gutter slope because the pedestrian’s path of travel is perpendicular to the gutter flow line.

Curb and Gutter Details

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• Positive flow line drainage shall be maintained through the PAR at 2% maximum. No ponding shall be present in the PAR.


• Curb ramp types where the pedestrian’s travel is not perpendicular to the gutter flow line (i.e. directional, depressed corners and fan ramps) shall have a flattened gutter slope of 2% to 3%. 3%.


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•Outflow Gutter 5% Max.


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• ADA Curb Extension with Compound Radius ( Bump Out ) • Combined Directional ( Compound Radius )

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Side Treatments

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1:6Graded Flare

• When adjacent to pavement, flares shall be constructed at 8-10% max slope.

• When adjacent to turf, 1:6 graded flare is generally preferred.

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• A walkable surface is defined as a paved surface adjacent to a curb ramp without raised obstacles that could be mistakenly traversed by a user who is visually impaired.

Side Treatments

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1:6

Side Treatments

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• A walkable flare is a concrete flare constructed adjacent to a curb ramp with a slope of 8% - 10%.

Detectable Edge at Quadrant• All constructed curbs must have continuous

detectable edge for the visually impaired.

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Detectable Edge at Quadrant• Curb tapers are considered a detectable edge when the

taper starts within 3” of the edge of truncated domes.

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0”0”0”

0”

3” MINIMUM CURB HEIGHT / 4” PREFERRED

4”

• Detectable warnings shall be place 1’ from edge of bituminous roadway… for visual contrast.

Detectable Edge w/o Curb & Gutter

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1 ft.1 ft.

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RR Crossing Revised in 2015

• Domes to be 12’ min. to 15’ max to the nearest rail (measured perpendicular to rail)

• Concrete railroad crossing surface shall extend 2’ past the outside edge of walk/path


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Vertical Face Curb

V-curb adjacent to building

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V-curb adjacent to landscape and (1) outside sidewalk limits [preferred], (2) inside sidewalk limits.

(1) (2)

Vertical Face Curb

Semi- Directional Ramp

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Semi-Directional Ramp (3,4,9) with Walkable Flare

3 ft.4 ft.

9 ft.

Standard Plans Push Buttons Sheet 5

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Standard Plans Push Buttons

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Push Button mounted on V-Curb in Median Island to maintain PAR and MAR width.


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Transition Panels

Transition PanelRamp

LandingTypical section height

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T


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Standard Plan Sheet 6

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Reinforcement Details


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Reinforcement & Expansion Details


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Reinforcement Details for sidewalk replacement


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Curb line and road crossing adjustments

ADA Training Module: Standard Plans 2018

Questions?

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Documents

State of Minnesota Sample PowerPoint Template · 2019. 5. 16. · • Maximum length of initial ramp is 15 feet. • Slopes and dimensions are absolute. PROWAG allows no tolerances