1,165. The Walls of a Succah

Hilchos Shofar, Succah v’Lulav 4:3

If the two walls of a succah were parallel to one another with open space between them, one should erect a wall slightly more than four handbreadths in width (about 12”) and position it within three handbreadths (about 9”) of one of the other two walls, rendering the succah fit for use. One must still build the form of an entrance. If the schach extends beyond the succah and one wall extends with it, it is considered part of the succah.

Hilchos Shofar, Succah v’Lulav 4:4

If walls are connected to the roof of the succah but they do not reach the ground, then if they are suspended more than three handbreadths above the ground (about 9”), they are invalid. If the distance between the walls and the ground is less than that, they are fit for use. If the walls are connected to the ground but they don’t reach the schach, then if they are ten handbreadths high (about 30”), they are valid even if they are several cubits from the roof; this is so provided that they are situated under the end of the roof. If the roof is distanced from the wall by more than three handbreadths (about 9”), it is invalid; less than that is valid. If one took a partition that is a little more than four handbreadths tall (about 12”) and suspended it within three handbreadths of the ground and within three handbreadths of the roof, it is fit for use.