Boneh, Soseir, Makeh B’patish – 10 – Binyan Arai  – 2;  Mechitza and Omed B’ruach Metzuya –   – (Klal 39 Siman 4) – Meleches Shabbos – S0790

This shiur continues in the melacha of boneh, discussing the validity of a mechitzah that moves in a ruach metzuyah (regular wind), and whether minimal swaying makes it pasul or if it remains kosher unless it moves at least three tefachim. This machlokes applies to sukkah as well as to boneh. The shiur also discusses how ruach metzuyah is defined based on the wall’s specific location.