Does a publicly-owned city with two entrances (through which the public enters one and exits the other) require an exclusion (shiur) for a valid city eruv, even if it later became private property?

Can a city that was originally private property (owned by one individual) be included in a single city-wide eruv without any exclusion?

4 opinions

Does a publicly-owned city with only one entrance require an exclusion (shiur) for a valid city eruv?

3 opinions

What is the minimum valid exclusion (shiur) for a city eruv when an exclusion is required?

4 opinions across 3 eras

Can houses excluded from a city eruv (as the shiur) qualify even if their entrances face outward (away from the city) or if they are animal/storage buildings that themselves don't require an eruv?

2 opinions

Can non-Jewish houses count as the required exclusion (shiur) for a city eruv?

4 opinions across 3 eras

Does a ladder (on the city wall) on one side count as a 'second entrance' that would require a shiur for a city eruv?

3 opinions

Does a garbage heap (ashpah) in front of one of a city's two entrances render that entrance legally non-existent, so that the city can have a single eruv without a shiur?

3 opinions

If one alley in a city (of private origin) did not participate in the city eruv, does that alley prohibit carrying for all other residents?

2 opinions