b'Eruvin 77 : Marc Chipkin : 2020-10-25 A wall between 2 courtyards - how thick it has to be to affect carrying, priority given to ease of access, ladders acting as a passageway https://drive.google.com/file/d/1mKWf45UIsg48D0Z-Yut-uwVqM1T40fsT/view?usp=drivesdk'