[Avodah] simple eruv question

[Micha Berger]

On Sat, Oct 24, 2020 at 10:04:12PM -0400, Sholom Simon wrote:
> Take a bridge that goes over a local road.  Can we say that the side of the
> bridge (presuming it is straight) forms a mechitza, and we extend downward
> via gud achis?  Or do we say pi tiqra because we treat the bridge like a
> roof?  (I think you are explaining this, but I don't fully get it).

Assuming the bridge has some kind of support running along the side to
invoke gud achis, I would think both are in play. But you don't need that
support to qualify as a mechitzah, since pi tiqra would would on its own.

Tir'u baTov!
-Micha