Shabbat · Orach Chaim 363

Valid Cross-Beam Materials

34 questions · 62 opinions

What rabbinic corrective arrangement is required to permit carrying in a three-walled space open on the fourth side?

2 opinions across 2 eras

Mavoi and Lechi

How is a chatzer (courtyard) that is fully breached on its fourth side up to ten cubits corrected?

3 opinions

Mavoi and Lechi

What is a lechi (side-post) and what are its minimum requirements?

3 opinions across 2 eras

Mavoi and Lechi

Does a partial wall on the fourth side count as a lechi?

2 opinions across 2 eras

Mavoi and Lechi

Is a lechi that would be blown over by the wind valid?

2 opinions across 2 eras

Mavoi and Lechi

How close must a lechi be to the alleyway wall?

2 opinions across 2 eras

Mavoi and Lechi

May a lechi be made from broken fragments or plastered lime on a wall?

3 opinions across 2 eras

Mavoi and Lechi

Is a lechi made from the wood of an asherah (idolatrous tree) valid?

1 opinions

Mavoi and Lechi

Is a lechi valid when visible only from inside and not outside, or only from outside and not inside?

1 opinions

Mavoi and Lechi

Is a lechi valid if placed three tefachim from the wall or raised three tefachim off the ground?

1 opinions

Mavoi and Lechi

Is a lechi that was not placed intentionally as a lechi but appeared on its own valid?

3 opinions across 2 eras

Mavoi and Lechi

Is a naturally occurring lechi valid when it protrudes four cubits into the alleyway?

2 opinions

Mavoi and Lechi

What is the status of a lechi drawn along the length of the alleyway wall?

1 opinions

Mavoi and Lechi

What are the requirements for a korah (beam) to permit an alleyway, and does it need to be inside the alleyway walls?

2 opinions across 2 eras

Korah

Must a korah be placed with the intent to permit the alleyway?

2 opinions across 2 eras

Korah

Is a korah made from asherah wood valid?

2 opinions across 2 eras

Korah

What is the minimum width and structural strength required for a valid korah?

3 opinions across 2 eras

Korah

What strength is required of the pegs (supports) on which a korah rests?

2 opinions

Korah

What is the minimum circumference of a round korah?

1 opinions

Korah

What is the status of a curved korah whose curve extends outside the alleyway, above twenty tefachim, or below ten tefachim?

1 opinions

Korah

Is a korah valid when it does not reach from wall to wall or when two beams meet in the middle?

1 opinions

Korah

Are two korot placed side by side valid if neither is wide enough alone to hold a half-brick?

2 opinions

Korah

Is a korah valid when one beam is higher than another, neither at the valid height on its own?

2 opinions

Korah

Is a korah valid when a mat is spread over it but does not reach the ground?

1 opinions

Korah

What conditions of height, width, and length must an alleyway meet to be permitted by a lechi or korah?

3 opinions

Mavoi Requirements

Does a courtyard whose length exceeds its width have the status of a mavoi?

2 opinions

Mavoi and Lechi

What is the minimum width of a mavoi requiring a corrective arrangement?

2 opinions

Mavoi Requirements

Is a mavoi that ends at the sea on one side and a public refuse heap on the other valid without any corrective?

2 opinions

Mavoi Requirements

Where should a korah be placed in an alleyway with one long side and one short side?

1 opinions

Korah

What happens when a lechi or korah is placed in the middle of an alleyway rather than at its entrance?

1 opinions

Mavoi and Lechi

May a korah also be placed in the middle of an alleyway, and what inner-section conditions must be met?

1 opinions

Korah

How can an alleyway twenty cubits wide be corrected?

2 opinions

Mavoi Requirements

May reeds with gaps of less than three tefachim serve as the width-reducing post for a twenty-cubit alleyway?

1 opinions

Mavoi Requirements

Does a slope rising ten tefachim within four cubits eliminate the need for a corrective arrangement on the fourth side?

2 opinions

Mavoi Requirements