Go into any architectural consultancy employing people from different parts of the world and soon you’ll find two of them arguing about the way hinging of doors must be represented on drawings.
One school of thought says: the dotted lines form a symbolised arrow (symbolised symbol?) and indicate the opening of the door. The ‘opposition’ claims this to be misleading and wrong. The lines should connect the hinges with the door handle. Logical, of course!
Cadimage, the NZ Archicad-tool-developer is wisely catering for all tastes in their Doorbuilder. (see picture).
The above described issue is rather cute, specially when compared to arrows on stairs.
Here too 2 approaches exist:
One says, cut stairs at 1m above main floor level (as with the rest of the building). Allways show direction of rise with the arrow pointing upwards.
The other side promotes the same cutting process but with arrows going from the main floor both up and down. To avoid confusion ‘up’ and ‘down’ words are added.
There is another, third approach to this question that I find really amusing.
This approach advocates arrows pointing always upwards but the words alternating between ‘up’ or ‘down’ depending on the main floor’s relationship to the stair. (see picture);
Actually, not that amusing – having spent the day working on drawings strangely following this third approach – I have to ask: Why???