Position of the diameter symbol

This is only a pedantic query, but it will solve an on-going debate at work - namely, where should the diameter symbol (%%C) go? Before or after the number?

I feel it should go before the number, but my colleagues all say otherwise, even though AutoCAD automatically puts it before the number when you do a Diameter Dimension.

%%c100mm -or- 100mm%%c?????

Cheers in advance for any help,

Simon.

 

Hi Si,

Old School vs. New School
100mm%%c -or- %%c100mm
after vs. before

I started drafting in Jr. High School (note before Middle School days) and we were taught "after". I always practiced after all thruout my "Manual Drafting" days. As well as when I started CAD in 1986.

But by the time we started AutoCAD, we also started to adhere to "ANSI STANDARDS" currently ASME Y14.5.1M-1994, which is on our TitleBlocks.. We MUST practice the New School or we are out the door.

At first I didn't like it as old habits are hard to change. And I still don't agree with all of the STANDARDS, but who does????

So I say to you and everybody %%c FIRST. (diameter 1st)
*****************************
Reply From: Walt Engle
Date: Feb/24/05 - 11:05 (CST) NEW!

Re: Position of the diameter symbol
My answer to this has always been: How would you read it in a book? As Diameter 3" or 3" diameter? I am not a fan of autocad's automatic entry of diameter or radius BEFORE
the numerical entry. I have always advocated they be AFTER the numerical entry. I try to remind my students that a drawing is a picture of a book.
*****************************
Hi Walt! I say to you...how do you read 3 dollars as 3.00$ or $3.00? It's all a matter of getting used to something.

And you say you "TEACH"??? 21st Century is here already Walt. If you are going to teach, at least teach what's correct. Here's a little test for your students;

Which is correct and why?

%%c0.025 or %%c0.025" or %%c.025mm or
%%c.025 or %%c.025" or %%c.025mm

 

Hi Si,

Old School vs. New School
100mm%%c -or- %%c100mm
after vs. before

I started drafting in Jr. High School (note before Middle School days) and we were taught "after". I always practiced after all thruout my "Manual Drafting" days. As well as when I started CAD in 1986.

But by the time we started AutoCAD, we also started to adhere to "ANSI STANDARDS" currently ASME Y14.5.1M-1994, which is on our TitleBlocks.. We MUST practice the New School or we are out the door.

At first I didn't like it as old habits are hard to change. And I still don't agree with all of the STANDARDS, but who does????

So I say to you and everybody %%c FIRST. (diameter 1st)
*****************************
Reply From: Walt Engle
Date: Feb/24/05 - 11:05 (CST) NEW!

Re: Position of the diameter symbol
My answer to this has always been: How would you read it in a book? As Diameter 3" or 3" diameter? I am not a fan of autocad's automatic entry of diameter or radius BEFORE
the numerical entry. I have always advocated they be AFTER the numerical entry. I try to remind my students that a drawing is a picture of a book.
*****************************
Hi Walt!

I ask you...how do you read 3 dollars as 3.00$ or $3.00? It's all a matter of getting used to.

And you say you "TEACH"??? The 21st Century is here already Walt. If you are going to teach, at least teach what's correct. Here's a little test for your students;

Which is correct and why?

%%c0.025 or %%c0.025" or %%c.025mm or
%%c.025 or %%c.025" or %%c.025mm

 

In the U.S. before computers, 1970, drawn on paper I was taught after the
number.

 

Hi Simon,

There is no need for argument at all. Point your colleagues to the drafting standard which is used in your country and it will be the end of all drafting arguments.

Regards,

Igor.

 

Refer to your national technical drawing standard. The vast majority of
national standards specify the symbol before the numbers.