How steep was it?
Here is a shot I took last fall while visiting our friends in Nevada City, (northern California gold country). It was taken just outside of Nevada City/Grass Valley. Fortunately this steep section of...
Forum Discussion
pappcam wrote:Fishinghat wrote:
The grade in degrees is normally a percentage of a 45 degree angle. So, 31% would be about 16 degrees. That's still a very steep hill, but "doable". A 31 degree hill would be about double in slope and I'm not sure a typical wheeled vehicle could navigate it.
On the other hand, I've never been there and it could be much different than what I think the sign implies.
I'm thinking the sign maker confused degrees with percentage.
Percentage slopes actually are a percentage of 45 degrees so that is about a 16-17 degree slope. The sign does display percent and not degrees so the sign maker is correct.
?????
Percent slope is feet rise for a 100 foot horizontal distance. (or meters, or yards, et al, as long as the unit of measure is the same for both).
A 45 degree angle is a 100% slope. 31% is a 17.22 degrees.
To convert % slope to angle use the inverse tangent function on any calculator with trig functions.
