I never was good at Math. I could always add 2+2 and come up with 5 ! What I have is my dock at THE Warehouse. It is 5/16" high. I am trying to make a walkdown ramp to the parking lot. I have anywhere from 1" to 1 1/2" of length I can work with (the shorter the better). I would like the ramp to be at or < 10% of incline (handicap ramps are right at 8%). I have the forumla for figureing it all out...but it's as clear as mud to me ! H E L P !! pleeeeeeeeeeeeeaaaaaaaaaaazzzzzzzzzzzzzz.
Just slightly over an inch and a half (1.58") gets you 10%. If you want to hit 8%, you need to stretch it out to 2" (2.1") Have fun!
Thanxs.... I'll push it to 1 1/2 inches I was going to put steps in...but...have you ever tried going down steps with a hand truck loaded with 6 cases of beer ??? It aint pretty...trust me... .
OK, what am I missing here? 10% grade is 10 run to 1 rise, right? 5/16 x 10 is 50/16, 25/8, or a 3 1/8 inch run.
@mtntrainman can you wrap the ramp around the structure? Beyond that, anyone examining your layout so closely that they can ascertain your ramp is too steep? Well, um, you finish the statement. ☻
Like I said...clear as mud ! I just remember driving a truck. You come to a 10% grade it meant the road dropped 10 foot for every 100 feet you drove. 12% grade meant it dropped 12 feet for every 100 feet you drove. Trying to equate that to this equation just mkes my brain hurt !
If a ramp extends 3 1/8" and you only have 1 1/2" available and so, the ramp disappears under a roof and there's nobody there to see it, is the ramp still there? Doug
Wasn't she the sister of Sacagawea? No? Okay, now back to the problem at hand, I have several solutions for you to consider. 1. Why not just forget the math and put in the ramp and see how it looks? 2. Get a bigger layout. 3. Maybe an elevator? 4. Raise the ground so the ramp isn't so steep. 5. Put the ramp in the back of the building where no one will see it. 6. Forget the ramp. You don't need no stinkin' ramp. 7. Find a grade school school kid who is good in fractions. That's all for now my brain is starting to hurt.
Why not go to a building that has wheelchair ramps as required. Measure them or contact the contractor that builds them.
In real-life railroading, there are three classes of grades: 0.8 percent to 1 percent is "light grade," 1 percent to 1.8 percent is "heavy grade," and anything greater than 1.8 percent is "mountain grade Common rise or fall values for model railroads: 2%= .020" per linear inch of track. 3%= .030" per linear inch of track. 4%= .040" per linear inch of track. Let's express this another way..... At 2%, rise or fall will be about 7/32" per 10" of track At 3%, rise or fall will be about 5/16" per 10" of track. At 4%, rise or fall will be about 7/16" per 10" of track. Rise or fall Dimensions are close for easier understanding.
So... Is it the consensus that if we know the 'Rise' and the % of 'Grade'...we can't figure the 'Run' ? 5/16" 'Rise'...10% 'Grade'... = (??? inches) of 'Run'.... .
