grading slope

garbageguy · ‎02-12-2007

when I create a grading by slope in C3D07, I get the same thing whether I give a slope of 3:1 or 1:3 - is that right?

Civil3DReminders_com · ‎02-12-2007

I think the program changes the value to match what is in the Edit Drawing Settings under slope, the program assumes you made a mistake since you told it you wanted to use it one way. If you want to have 0.33:1 you can use 3:9 and it will do the correct math.

Civil Reminders
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http://www.CivilReminders.com/

Alumni

garbageguy · ‎02-13-2007

the drawing's slope format is set to "run:rise", why won't 1:3 give me that slope?

Anonymous · ‎02-13-2007

In my experience there is no need to type in the 1. For example, I would type a 3:1 slope in simply as 3. Seems to work every time.

Fred Mitchell
APAI

Civil3DReminders_com · ‎02-13-2007

Because that's the way it was programmed. If you want 1:3 you need to enter 0.33333 or 3:9 or 6:18 or some other numerical value. The program assumes you made a mistake and converts it to the way you have it in the settings if you use a 1:x value.

Civil Reminders
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Alumni

Anonymous · ‎07-10-2021

which one is the horizontal or vertical?

Anonymous · ‎07-10-2021

may you explain in a widey way,.... i want to know how it is (H:V) OR (V:H) AND THE (3) VALUE FOR WHICH ONE?

Joe-Bouza · ‎07-11-2021

Hello @Anonymous

Call me silly they always meant the same to me

1 unit drop every 3 units

are you really looking to grade a slope

3 unit drop every 1 unit?

sounds like a wall is in order

Joe Bouza
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Joe-Bouza · ‎07-11-2021

Joe Bouza
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rl_jackson · ‎07-11-2021

Agreed, 2:1 is 2 for every 1, 4 to 1 the same... (and can be looked at in reverse based on situation). Soon we will have those rockets to mars.

Rick Jackson
Survey CAD Technician VI
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jmayo-EE · ‎07-12-2021

1:3

Isn't this convention rise over run?

Either way don't waste your time typing a full ratio. Just type 3 and hit enter if you want 1:3.

John Mayo

fcernst · ‎07-12-2021

No, take a look at the Input Parameters in the Help for the subassemblies.

You will see the slopes need to be in run/rise or percent format.

If you give a daylight slope of 3:1 you will get a run/rise design slope of 3:1.

If you give a daylight slope of 1:3 you will get a run/rise design slope of 1:3

Fred Ernst, PE
C3D 2025
Ernst Engineering
www.ernstengineering.com

Joe-Bouza · ‎07-12-2021

exactly. ... that being said. aside from 1 run to 3 rise being impractical ... can the input even accept 0.33?

Joe Bouza
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jmayo-EE · ‎07-12-2021

Yes

John Mayo

Joe-Bouza · ‎07-12-2021

there were two parameters in the question/statement (lol)

Joe Bouza
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