What is this symbol called in drafting?

[CalypsoArt]

What is this symbol called in drafting? I know it defines the difference in planes. Is there a limit to it use. Can the dimension be 12"?

 

Any suggestions on a website where I can find the names and uses of drafting symbols.

 

Thanks

[BlackBox]

Symbol definitions are usually found in a legend. There are industry standard symbols which are widely accepted as best practice, but each company (or agency) has it's own standard legend of symbols.

 

Is this from a homework assignment, by chance?

 

IMO - it appears to be a simple 'tic mark' indicating the midpoint of the wall, where the 'tic' on the outside is exactly 2" toward the bottom corner (on both sides).

 

Hope this helps.

[ReMark]

I'm not so sure that it is a midpoint.

 

It's some kind of offset but for what exactly remains unclear.

[BlackBox]

I'm not so sure that it is a midpoint.

 

It's some kind of offset but for what exactly remains unclear.

 

Maybe if the other page(s) of the 'homework assignment' were posted, we'd have a definitive answer...? lol

[ReMark]

Maybe if the OP told us what the rectangle was supposed to represent it would be helpful too. I'm not so sure it is a window.

[CalypsoArt]

LOL, Not a homework assignment. Been out of school for years. I got this in a drawing that I'm editing. I know what the symbol means. It is defining the inner rectangle as being recessed 2" from the front face. It is visible on the plan.

 

I've seen it before, I just wondered if there was an actual name for the symbol, and if there was a limit to the depth allowed with the symbol before a separate elevation would be required. I work in the entertainment field so much of what we use for symbols is an amalgamation of the different training we have had.

Edited October 7, 2010 by CalypsoArt

[ReMark]

Thanks for the education. How about moving to 3D then the recess will be more apparent? Just a suggestion.

[CalypsoArt]

I do all my modeling in Sketchup Pro. This question is purely for my own education. Also for my purposes, if it was acceptable to use the symbol for recesses up to 18" or so I'd use it a lot myself.

n this work I deal with people who have backgrounds as Architects, Engineers and some like myself, trained in drafting for Theatre and Industrials. Everyone seems to think their way is the "correct" way even though this industry is not the same. In this business we are all about facade. Everything is fake. So for me the correct way is the way that gets the job done, in the time allotted, and at the budget.

Edited October 7, 2010 by CalypsoArt

[ReMark]

If it works for you then who am I to try and convince you otherwise?

[Pablo Ferral]

I don't think it's really an 'Offical' symbol at all. In which case - you can do what you like with it, as long as the end user of the drawings knows what you mean!