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So, what slope percentage is straight up?
If a rise of 10' over a run of 10' = 100%, then a rise of 20' over a run of 10' = 200%. Where does it stop?
Some use slope percentage that way while others consider straight up to be a 100% slope. The 10'/10' would then be a 50% slope. That is why you see slopes referenced as 2:1 or 1:1 in regulations and on engineer's plans.
You will also notice that all measurements are in feet and decimal feet. That is enough to drive you nuts if you are using 8" retaining wall blocks.
Then we have the brilliance of the State of Massachusetts that decided that if they changed to the metric system everyone else sure would. All work for the Massachusetts Highway Division (no matter who does it) has to be done in metric. That means that surveyors have to convert everything including topography. When you draw plans you have to show dimensions of of all the signage in cm when they are actually all in inches. What do you think that does to the cost of design work?
(note: Massachusetts politicians can find a way to make the simplist things extremely expensive)
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