וChelek 6
- A strip of schach-possul 4 tefachim wide in the middle, divides the sukka into two. You might not have 3 walls for each sukka in which case each will be possula. (ShA – MB )
- Less than 4 tefachim of schach-possul will not disqualify the sukka. Some poskim say that you should not sit under the schach-possul unless it is less than 3 tefachim wide. Be machmir, l’chatchila. (ShA – MB )
- If the schach-possul is next to a wall, we say “dofen akuma” up until 4 amos. The wall bends until it reaches the kasher schach. You cannot sit under the “dofen akuma” – it is too big to be bottel to the schach. (ShA – MB )
- Three tefachim of schach- possul will disqualify a sukka of less than 10 tefachim. Because three tefachim is significant enough to stand alone, it cannot be added to the overall minimum shiur of 7 tefachim. (ShA )
- Air gaps that are three tefachim wide will divide your sukka into two parts. Each part might not have three walls and therefore your sukka might be possula. This applies only if the air gap extends from one end of the sukka to the other – or if there is one gap the size of your head and body. (Smaller gaps are normal air spaces in a sukka.)(ShA )
- Strips of air space less than three tefachim wide can combine for the minimum size 7 x 7 tefachim. Nevertheless, you are not allowed to sleep under the air space. (ShA )
- If you have a strip of air space that is too wide, you can fill it up with metal poles to minimize the gap to be less than three tefachim.This is because schach-possul less than 4 tefachim does not combine with air gaps (less than 3) to disqualify a sukka that has 7×7 of schach- kasher.(ShA )
- In the above case, you still must avoid sleeping under the air gap.(MB )