> Fa3ien wrote:

>>
>>> (I just reliased... Every single doorway in the place has a unique ID 
>>> written on it. Wow.)
>>
>> That's pretty normal. The drawing is probably linked to some spreadsheet
>> saying how much doors of what type are needed.
> 
> I wonder if that's what "FD30SC" means? (Every door seems to have this 
> written next to it, in addition to a unique number of the form "DB7".)

FD = Framed Door ? (such conventions are hardly universal)
30 = maybe 30 minutes fireproof ? on the leaf is 30 inches wide ?
SC = Single C???... ?

Sometimes there's an explanation on the edge (along with the meaning of hatches).

Fabien.

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