challenges of round doors

[cellio]

There is, apparently, a construction company out there that will build you a house styled on a Hobbit hole. Naturally, an important question arises for Jewish owners of such homes: do you put a mezuzah on a round door, and if so where? The mezuzah is the scroll (containing certain torah passages) in a case that is affixed to your doorpost -- so

Comments

[browngirl]

A round door still has to open and close, right? Hobbit hole doors as seen in The Movies opened iike rectangular doors do, so they had doorposts, just short ones.

Now, how do these nice people construct their hobbit hole doors? *goes to look*

[cellio]

The door has to open and close, but it seems possible to design one that has only enough straight section to support a super-strong hinge. Relevant questions seem to be: (a) how long a straight section do you need to qualify as a doorpost, and (b) does your doorpost have to go all the way to the ground? (Is it still a "post" if it just kind of floats there?)

[thnidu]

I don't see why the door has to have a straight part of its perimeter at all