Respected Mufti Sahab I want to ask that suppose a person is saying his prayers in the mosque of zuhr with jamat but due to some reason he misses one or two rakat. So after the namaz is over the people who are in the front row has to get out and this person is still saying his prayers. So some people place a chair, which we get now days the plastic one, in front of him and then passes from front. So I want to ask that the chair has a gap in the middle and the legs of the chair is also not thick enough to make it act as a Sutra. So is passing from the front keeping these king of thing is ok or a sin. What are the other conditions for a Sutra and If the condition is not met fully will the person passing from front will be sinful. Please answer soon and thank you for your valuable time. Jazzak Allah!
Note: I have seen that you answer very breifly. If you could elaborate a little on all your answers it would be beneficial for us to read and understand.