Eruvin Made Easy part 11: The Eruv is Up But I Can't Carry

Shlomo HaMelech made a gezeira against carrying from one reshut hayachid to another reshut hayachid. In order to be able to carry, we perform an עירוב חצרות to combine all the רשויות היחיד into one רשות היחיד.

The eruv food has to be acquired by a resident of the Eruv area on behalf of all the residents.