[coleman]

yes, approach ramps are typically removable on all such lifts...

one lift that we looked at was different, but the ramps were hinged and essentially retracted (swung down) when the lift was raised.

now if you do intend to remove and replace them very often, you may want to consider the aluminum ramps as opposed to the metal ones that typically come with these lifts.
the aluminum ramps are roughly half the weight (varies slightly).
but in one case it is 36 lbs vs ~62 lbs for each ramp.