Bill, the ramps look great but I agree with Mike. From the pictures it looks like there is potential to drag on bad dip in a parking lot or driveway. Another option is putting a set of "casters" underneath so the ramps don't scrape. They make them for motorhomes and trailers. I don't think they are very expensive and may save your ramp brackets. Something like this.
~ Billy Old Dominion Stovebolt Society: Exotic Animal Division 1946 Chevrolet Cab Over Engine | In the Gallery | Video | More pictures 1959 GMC 860 | Pictures 1950 Chevrolet 3800 | Pictures I've got a trailer and I'm not afraid to use it!