[richb]

I am drawing a blank. I don't  have any man made grades in my existing line but am installing a secondary ''mountain "line. I am drawing a blank on how to calculate grade. For each 12 inches of distance you add ------ inches of elevation to get a 1,2,or3% grade. Help,Help!!!!!

 

[Paul Norton]

A 1 inch rise over 100 inches is 1 percent.
 
A 1 inch rise over 50 inches is 2 percent.
 
A 1 inch rise over 25 inches is 4 percent.
A 3/4 inch rise over 25 inches is 3 percent.
A 1/2 inch rise over 25 inches is 2 percent.
A 1/4 inch rise over 25 inches is 1 percent.

 

[richb]

Thank you very much,some times with age and health problems you loose segments of your programs,thanks again!!!!

 

[Steve Stockham]

Lets work that to 10ft. distance:
    10% would be 1ft. or 12"
      5% would be 6" 
     1.2" is a 1% increase.
      
 

 

[East Broad Top]

A 1 inch rise over 25 inches is 4 percent.
A 3/4 inch rise over 25 inches is 3 percent.
A 1/2 inch rise over 25 inches is 2 percent.
A 1/4 inch rise over 25 inches is 1 percent.


Many folks "round down" to 24", and use a 24" level and a step block set to 1/4" increments to measure grade. It measures just a bit steeper--about 1/10%, but the difference will never be noticeable.

Later,

K

 

[barnmichael]

I used a four foot level with a spacer. See the thread at http://www.mylargescale.com/Community/Forums/tabid/56/forumid/23/postid/18328/view/topic/Default.aspx for pictures of using it with grade stakes to maintain a steady grade.

Michael