lol i am think he meant space in your garage or were ever your going to put it. So if you have a small section to put it in do 30 degree if you have more room then do 20 degree. hope that cleard up a few things. :thumb:
If you want the ramp to achieve a certain height, say 4 feet, it will take a longer ramp to achieve 4' at 20 degrees than at 30 degrees. 30 degrees is steeper, therefore it reaches your desired height faster.
An RTI ramp actually. Ramp Travel Index as they used to be known.
About a decade to 15 years ago they were all the rage as vehicles developed longer travel and softer riding suspension. Spring over conversions and long travel coils. Great for tweaking suspension bits.
It keeps the over sized trees in my yard company.
The one I have is massive. We built it to withstand F350 crew cab and such vehicles. The drive up deck is 13' long and about 20" wide. expanded metal over frame. The wedge is a pivot point so that we can have it at 20 or 30 degrees. The supports are sleeved and have different pin holes so that when we raise it up, we re-pin at the greater angle.
Its fricken heavy to move. We keep tossing around ideas to make it into a trailer.
But as vehicles kept getting better and better, longer and longer travel suspension and wider and wider track widths. 13' is not all that big anymore.
I looked at building one a while back but unless you have a large club or group you wheel with often I don't see a point in building one. That's what I came up with though, and the off road community in the FL panhandle is lacking to say the least.