National ramp Liberty Series, Installation Manual

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With the total height determined, plot out how to best fit the needed ramping on the property,
keeping ADA guidelines in mind
(see page 24 for ADA guidelines)
.
OTHER CONSIDERATIONS FOR RAMP LAYOUT:
ƒ Property obstacles:
These may include utilities, landscaping, gutter lines, septic tanks, A/C
units, and access to sheds or garages. Be sure to also check clearings for power lines, carports,
and awnings, for the safety of anyone who may be walking on the ramp.
ƒ
Grade variations:
Be aware of changes including a cross slope, where the ground changes
across the width of the ramp, or sudden rises or dips that will require different leg heights.
See page 37 for more on grade variations
.
ƒ Knowing the user and their mobility device:
Long scooters may require a large turn radius for
90° turns, and the ADA recommended 4.8° slope may be too steep for some self-ambulating
users.
ƒ
Approvals and local codes:
Does a homeowner, Home Owner’s Association, or property
manager need to approve the ramp layout? Is a permit needed? Does the town require ramp
setbacks, or the use of vertical pickets?
ƒ Screen door vs. inset door:
For a screen door, the ramp cannot impede with the ability to
open and close the door. For an inset door, you need a smooth transition between the ramp
and door.