ROAD GRADE ?: Tractor Safety  -- General Tractor Discussion Forum and Review ROAD GRADE ?: Tractor Safety -- General Tractor Discussion Forum

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 09-09-2011, 13:30 Post: 180287
skipll



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 ROAD GRADE ?

Hello
I bought a tilt meter( 25CDA ) for my excavator & have a question bout it. When it reads 20 on the incline scale-----what would that be in road grade % . I have googled -----but I still do not understand how to convert that 20 into road grade %.






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 09-09-2011, 14:39 Post: 180288
auerbach



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 ROAD GRADE ?

That means whatever it's on is tilted 20 degrees but not sure what you mean by "incline" because that device shows both horizontal and vertical tilt. I imagine road engineers have their own scales for crowning but I'd think in degrees it would be maybe up to five.






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 09-09-2011, 15:44 Post: 180289
skipll



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 ROAD GRADE ?

I am talking bout vertical tilt here---when that vertical meter is on say 20--that would be degrees---so what would that be % grade---like ya see on the road----
I cannot seem to post a picture of a sign only a explanation of one

'Indicates a downgrade, hill, or slope with an 8 percent grade.'



THERE is a picture of one in the Url title---scrool down






Link:   http://www.cksinfo.com/traffic/roadsigns/warnings/index.html 
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Tractor Safety: ROAD-GRADE-

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 09-09-2011, 16:19 Post: 180290
auerbach



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 ROAD GRADE ?

If you google "road grade" you'll find info like this:

"The grade of a road is expressed as a percent, and defined as the vertical gain or loss divided by the horizontal distance times 100. Even though you don't know the horizontal distance, you can still calculate the grade. This application first finds the horizontal distance using the elevation and distance along the road, then uses the elevation and the horizontal distance to calculate the grade. The solution is exact, not an approximation. A flat road is 0% grade, while 100% grade is a 45 degree angle."






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 09-09-2011, 16:50 Post: 180291
skipll



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 ROAD GRADE ?

YES---I saw that & many others too---but that does not answer my question--Thanks






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 09-09-2011, 17:10 Post: 180292
kthompson



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 ROAD GRADE ?

Skip, Murf and Earthwerk (may be off on that spelling) are the road builders here. If they don't hit this then send them private mail.

Auerbach, not saying you are not 100% correct and hope does not offend in any manner.

Now let me understand a 100% grade is 45 degrees? Makes sense. Wonder grade some of NASCAR banks are on their high bank tracks?






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 09-09-2011, 17:42 Post: 180294
skipll



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 ROAD GRADE ?

Thanks KT----I will wait a bit fore I email them---

AND OH------Talladega Superspeedway has the steepest banking in the turns. Turns 1 and 2 have 33 degrees of banking. Turn 3 is 32.4 degrees and turn 4 is 32.5 degrees.


WOW----TOO MUCH FOR MY MACHINES Laughing out loud






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 09-12-2011, 10:50 Post: 180318
Murf

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 ROAD GRADE ?

Skip, I don't think any 'converting' is required, without knowing what model of "inclinometer" you have, I'm pretty sure you'll find that 20 does mean 20% slope, in degrees (Auerbach was correct) 45 degrees is 100% slope.

That being the case, 20% would be 20% of 45 degrees or 9 degrees slope.



Best of luck.






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 09-13-2011, 19:15 Post: 180344
skipll



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 ROAD GRADE ?

Thanks Murf----this is all confusing to me--- 9 degrees sounds rite.

& thanks auerbach for your time in suggestion of google links.






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 09-14-2011, 11:51 Post: 180358
Murf

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 ROAD GRADE ?

Skip, it shouldn't be confusing, it's just IMHO one of those things that seem confusing, then once you get it straight, it's like "oh, that's easy!".

Here's how it works. A slope is expresses in 1 of 3 ways usually;

1) rise (or fall) over run. Commonly used in the context of a drain (an 1" of fall in 10') or roofing (a 6/12 pitch).

2) degrees. Easy, an angle is an angle.

3) percentage. This is where it gets confusing. The key is that, as in above, a 12/12 pitch, that is a foot down (or up) in a foot of distance is 100% slope, one foot for every one foot.

I tell people that the percentage method is actually the easiest to work with since as the name literally means from Latin, it's based on a relation to a hundred units. A slope of 9% is just that then, a fall of 9' in a distance of 100'.



Best of luck.






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Discussion Boards > Active Subjects > Messages as Posted > Tractor Safety Forum

Thread 180287 Filter by Poster:
auerbach 2 | bristan8 1 | kthompson 3 | Murf 3 | skipll 6 | yooperpete 1 |




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