There are several places one can find aluminum handicap ramps. The most convenient place to find them would be at a local store such as Home Depot. There are also several websites that sell ramps of that kind.
You could try Amazon they have different types for different Prices which is a wild range to choose from or you could go to E-bay which may sell its Handicap ramps for less you will have to compare the items
One can find handicap accessible vans locally in your telephone company's Yellow Pages or on the YP's website.You could also try Ride-Away on the web.
Ramp Solutions offers severel ways to build stair ramps and a place to get the materials. You could learn everything you need to know about stair ramps from one website.
Instructions for building one's own skate ramps can be found on many DIY sites and general information websites. DIYSkate and About - Skateboard are two of the more accessible sources for making skate ramps.
You can find information about aluminium recycling online at the Recycle-More website. You can also find out information relating to aluminum recycling at Earth911.
Massachusetts state building code requires handicamp ramps for 1 family dwellings to be constructed with a 1:12 pitch. The pitch is described as: one foot of ramp for every inch the entry to the home is above ground level.
One can find more information about anodized products from the following sources: Aluminium Plating, Anodizing, Aluminium Anodizing, Sears, Target, Wise Geek, Focuser, Calphalon.
Axes, hatchets, knives, and razor blades uses the wedge to force materials apart. Ramps like handicap ramps and loading ramps allow things to go from one elevation to a higher or lower elevation with less effort. The blades of a blender or a food processor are wedges that spin around to cut up food. The front end of a snow plow is angled like a wedge to push snow to the side.
I recommend American Ramp, they have great prices and the ramps are very durable. I bought one at discount ramps last year and have been really happy with it
Stores that sell motorcycle parts and products usually carry these motorcycle ramps. One store that has is the Discountramps. They have motorcycle ramps at affordable prices.
These are given to them by the state. They provide proof of handicap, and then they are issued a plaque if they desire one.
One way would be to find a liquid that is chemically inert to both metals and has a density between that of iron and that of aluminium. In such a liquid, the aluminium would float and the iron would sink.