Conclusion of Sugya שיעור לחי ועומד מרובה:
Very quickly review the גמרא דף ה: “רב אשי אמר (seven lines from bottom of the Amud) until the two dots.
Review רמב”ם ה’ שבת פרק י”ז הלכה כב the first line and then skip to “לחי שהיה רחב הרבה”
https://hebrewbooks.org/pdfpager.aspx?req=14278&st=&pgnum=76
Major Questions on the Rambam:
How could the Rambam rule that a לחי is Kosher as long as it is not more than half the width of the Mavui. Our Gemara clearly says that if the לחי is four Amos wide it is disqualified?
How could the Rambam say when the lechi is the same size as the open space it is considered a Lechi when our gemara said when they are equal size the Mavui one is not permitted to carry in the Mavui?
See רמב”ם ה’ שבת פרק ט”ז הלכה ט”ז who rules פרוץ כעומד מותר (equal closure to open space is considered a mechitza) Why does the Rambam say that when the lechi is the same size as the open space it is considered a Lechi and not valid through the concept of פרוץ כעומד מותר?
Learn מגיד משנה “לחי הבולט who explains how the Rambam learns the conclusion of our Gemara. But remains with a question on the Rambam
Learn ח’ גרי”ז בכורות י”ז עמוד ב
Learn ח’ הג”ר משה הלוי על רמב”ם ה’ שבת פרק י”ז הלכה כב (see below. One more page added below today for an explanation of the Rambam
