If a trench between two courtyards is ten deep and four wide, they may make two eruvin, but may not make one eruv, even if it is filled with stubble or straw. If it is filled with earth or pebbles, they may make one eruv, but may not make two eruvin.

If one placed a board which is four fists wide across it, similarly if two balconies are opposite each other, they may make two eruvin, or, if they wish, they may make one eruv; less than this, they may make two eruvin, but may not make one eruv.

If a haystack between two courtyards is ten fists high, they may make two eruvin, but may not make one eruv. These may feed from this side and those may feed from that side. If the hay was reduced to less than ten fists, they may make one eruv, but may not make two eruvin.

How do we make a shituf for an alley? One places a barrel and declares, ‘‘Let this belong to all the residents of the alley.’’ He may confer possession to them through his adult son or daughter, through his Jewish manservant or maidservant, or through his wife. But he may not confer possession through his minor son or daughter, nor through his Canaanite slave or slavewoman, because their hand is like his hand.