[X-man]

I read a lot of posts saying they were driving up a 6% or 8% grade. How do you the the grade. Is there some sort of meter that I could buy? /ubbthreads/images/graemlins/grin.gif

 

[Ford_Forgotton]

Its usually posted on a freeway sign along the road telling you the grade.

Truckers use that info to plan their route, or to make sure they are in the right gear for the load so that they can maximum engine braking, and dont burn up their service brakes.

 

[anyping]

Not sure what you are asking with the typo's. But the way I understand it is that a 6% grade means you are going up or down 6 feet in elevation for every 100 feet forward you travel on the road.

 

[Fat Diesel]

I tried looking through the archives, it was resolved on a post at some point. It's something like a percentage of 45 degrees. If it's a 10% grade, then it's about 4.5 degrees. I think... /ubbthreads/images/graemlins/rolleyes.gif

 

[PSD PAC]

A 45deg slope is a 100% grade; fractions down from there (so 4.5deg is 10%).

8% seems really steep when you're looking down it, even though it's only 4 degrees...

 

[FloridaEd]

C'mon, guys.

Grade is a number, expressed as a percentage, which shows how many feet per 100 feet the road rises or falls.

So an 8% grade falls (or rises) 8 feet every 100 feet of roadway.

Now, some rules of thumb:

1. 6% down grade, particularly for any long time, is all you want to pull(see my sig) with a big rig, unless you have an exhaust brake.

2. Anything over 6%, slow down to about 25 MPH, put your auto (or stick) into 2nd gear, and go down SLOW. Get on and off the brakes so they don't get real hot....if you're pulling a load.
They have a small stretch of 10% grade coming down to the Peace River in British Columbia and it is scary with a rig on the back of the truck.

3. If you're not pulling anything, screw the grade. You won't really care.....


Florida Ed

 

[haul_n_horses2]

[ QUOTE ]
C'mon, guys.

Grade is a number, expressed as a percentage, which shows how many feet per 100 feet the road rises or falls.

So an 8% grade falls (or rises) 8 feet every 100 feet of roadway.

[/ QUOTE ]Right so 100% grade is a 100 foot fall in 100 feet so it is....................... viola 45º. You are all saying the same thing in different ways.

 

[Fat Diesel]

Thanks Horses. Sometimes we need someone to slap us around like the three stooges.. /ubbthreads/images/graemlins/biggrin.gif

 

[JimTJr]

/ubbthreads/images/graemlins/phoney.gifMy head hurts...have not had to use geometry for so darned long,,, /ubbthreads/images/graemlins/shrug.gif /ubbthreads/images/graemlins/biggrin.gif /ubbthreads/images/graemlins/eek.gif /ubbthreads/images/graemlins/confused.gif