.0mm, jeez she's an accurate project!
I think the picture of the rack looks great, I rekin you should change where you put some of your measurements though.
The 600mm depth should come off the side rather than the top (same as the 900mm width).
The 2400mm height should come off the left hand side of the edge line of the 900mm width.
Not being critical, just my feedback, I look at these types of drawings everyday at work.
Certainly could build it from your drawing though.
Good stuff,
Andrew