The HMinfo Research Library contains an in-depth collection of materials on home modifications and related subjects.
The Research Library does not lend books and other items. Under special circumstances, requests to use the library may be made by emailing .
This study evaluated the usability of a range of ramp slopes allowed under the current ADA accessibility guidelines. One hundred seventy-one subjects of all ages and using different types of mobility aids traversed a 30-foot ramp varying in slope from 1:8 to 1:20. Data included pulse rate, energy expenditure, rate of travel, distance traveled, and the location of rest stops. Findings showed only a few manual wheelchair users had difficulty traversing all 30 feet in ascent, even on slopes as steep as 1:8. No changes to the technical requirements for ramp slope and length were recommended.
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