Ramp Information

Ramps can be made of wood, steel, fiber glass or aluminum.
To use a wheelchair ramp safely on a ramp the ratio of vertical drop to length of ramp should be a minimum of 1:12.
This means that for every inch of drop you will want one foot of ramp.
An example would be for a 36 inch drop in height you would require a 36 ft. long ramp.
There should be a landing every 15 ft.
Local building codes may differ from this ratio.
The key issue is you need a long ramp if you are going to try and use one to get a wheelchair up more than 24" of height.
A porch lift or vertical platform lift may be a more viable alternative.

Wheel Chair Ramps Factors

A portable aluminum ramp is a good choice if you are trying to accomodate one or two steps in drop.
If there are three steps or more in height then a wheelchair lift or platform lift would be a better solution.

Where you start the ramp at ground level make sure there is absolutely NO BUMP whatsoever. Angle the wood or cut into the ground to make this happen.
Local building codes may apply to slope, railings and width of ramp.