Shalom Rabbi. I have a frame for a marque I want to use for my sukkah. But I have two concerns: 1) for safety reasons the full frame needs to be used but that means that you have metal poles going over where the Shoah would be. The poles are only about 5cm thick and shadow over very little of the schach. 2) the front and back small walls have that extend higher than the other walls. Those laying schach across the other walls means that the walls on the front and back are higher than the schach which is across the entire length Thank you

ב"ה Shalom 1. My understanding is, that you are concerned about the metal poles of the marquee, which are ABOVE your kosher Schach. If we consider the poles non-kosher Schach, non-kosher Schach only disqualifies the sukka (depending where it is) when it is 4 Tefachim wide (approx. 31 cm. ) in a large sukka. So, in your case, since it is less than 5cm width, it poses no problem. (Shulchan Aruch 632:1) On the other hand, if the metals poles are needed to support the Schach, the schach should not lie on them directly. You should put a strip of wood on the poles to separate the schach from the poles. 2. In regard to the second issue, my understanding is that the lower walls do not reach up to the Schach. This also poses no problem, as long as the height of the shorter walls is at least 10 tefachim, (approx.. 80 cm) (Shulchan Aruch 633:8) and the walls are standing within 3 tefachim (approx.. 24cm) from the floor. All the best Chag Same'ach