On a vehicle which uses a ramp for entry, the driver may have to assist in pushing a manual wheelchair up the ramp (particularly where the ramp slope is relatively steep)....
Search Results "Slope"
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Section 37.165 Lift and Securement Use
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Section 37.42
Section 38.95(c)(5), referred to in the regulatory text, permits various ramp slopes for bridge plates, depending on the vertical gap in given situation....