elevation levels

[Dipali]

My queri is relating to architect's drawing not about ADT

I am doing documentation for some one else. and in there sample drawing they have written levels in 2 ways
ffl-11.429 ffl=0c
ffl-10.315 ffl=-13c
ffl-13.158 ffl=20c

Difference between this 2 types of level is not equaling to mm diensions between them but slightly higher than that.

I do not inderstnd this method.
anyone got any idea?

I will get the chance to ask the client tomorrow but I would like to get my headstrat on this bcs I had promised him drawing sooner.

[JerryG]

Dipali,
Are they labeling in meters not MM.
So 1" =.083 meters etc. As to the other # and the C ???
Please post the answer when you get it.

Thanks

[f700es]

Wow, I don't get that either!!! Sorry man :(

[Dipali]

Thanks for trying Jerry. for your info.
Last night I was confused with this & so left it & started working on line drawing of section. this early morning, I realised it could be related to height of the bricks they use & they are writing height in terms of course of bricks.
I talked to client, & my guess was correct. they are refering to brick courses & one course is .86mt. so you check the ht. devide it by .86 & than use the nearest round figure to specify the course of bricks. they write this at all windows sill & lintell lvl also & door's lintel level also. so 'C' stands for 'course'

[JerryG]

Wow, I would never have thought that!
Thank you very much for the clarification.