The numbers for the Gunnebo door are impressive by today’s standards (3.2 meter diameter and 70,000 kg total weight) but help underscore problems comparing doors. When stating the diameter of the door, assuming it’s tapered, is that the large diameter or the small diameter? When stating the weight, is it just the door or does that include the hinge and/or frame?
To be fair, Gunnebo is unusually clear in stating the door is 3.2 meters and the outer frame is 4 meters, though it still isn’t obvious what “outer frame diameter” means. And they do state the weight of the unit including tunnel frame is 70,000 kg, not just the door (and they incorrectly use “Kg” instead of “kg”).
Something else I’d like to know is whether the door was cast as one piece, or if it was welded up from many plates.
In older doors the same is true. The various specs for the Cleveland Federal Reserve are described in a confusing manner, for example in Wikipedia:[INDENT]Its original 100 short tons (91 t) bank vault door is the largest in the world. The hinge has an overall height of 19 feet (5.8 m) and weighs over 47 short tons (43 t) fully assembled. The door casting itself was 20 short tons (18 t)[/INDENT]
If the door casting was 20 short tons and the finished hinge is 47 short tons that still leaves 33 short tons unaccounted for, I suppose by the frame.
