Rabbi Baruch Bodenheim: Gemara Eruvin: First Perek, יום רביעי Elul 6, Daf 14b (08/23/23)

Review the “גמרא דף יד: “ועוביין כל שהוא until “תנא עשה לחי”

Questions:

Why is the Gemara questioning how big is a כל שהוא; the words mean any little amount?

See “ריטב”א דף יד: “וכמה כל שהוא

https://hebrewbooks.org/pdfpager.aspx?req=37287&st=&pgnum=22

Is there a minimum width of a Lechi?

Learn תוס’ דף פ: “אבל קורה

https://hebrewbooks.org/shas.aspx?mesechta=3&daf=80b&format=pdf

Learn מרדכי ס’ תפ”ב who brings the opinion of the מהר”ם מרטנבורג that a vertical line of plaster 10 tefachim tall qualifies as a Lechi and a צורת הפתח

https://hebrewbooks.org/pdfpager.aspx?req=14312&st=&pgnum=397

Questions:

Is there a minimum width to the vertical posts of a צורת הפתח?

Does the Lechi need to be strong enough to support a brick – אריח?

The מרדכי brings the opinion of the מהר”ם מרטנבורג that a vertical line of plaster 10 tefachim tall qualifies as a צורת הפתח. Why is this acceptable? A flat thin layer of plaster is not strong enough to support a door made out of straw which is qualification for the vertical posts a צורת הפתח?

Learn תרומת הדשן ס’ עד (corrected source)

https://hebrewbooks.org/pdfpager.aspx?req=14655&st=&pgnum=32

https://hebrewbooks.org/pdfpager.aspx?req=14655&st=&pgnum=33

Learn בית יוסף ס’ שס”ג סע’ ז

https://hebrewbooks.org/pdfpager.aspx?req=14268&st=&pgnum=132

Does a vertical line of paint 10 tefachim tall qualify as a Lechi?

See משנה ברורה ס’ שס”ג ס”ק כו

https://hebrewbooks.org/pdfpager.aspx?req=60389&st=&pgnum=57

Learn בית יוסף ס’ שס”ג סע’ ז

https://hebrewbooks.org/pdfpager.aspx?req=14268&st=&pgnum=132

Does a vertical line of paint 10 tefachim tall qualify as a Lechi?

See משנה ברורה ס’ שס”ג ס”ק כו