Does pi tikra (roof edge descends and seals) require the roof to be at least four tefachim wide?
Synopsis
There is a dispute between Rashi and Rambam (who hold any width suffices) and Tosafot, Rosh, Smag, and Tur (who require four tefachim) about the minimum width needed for pi tikra to function as a valid partition.
More in Side Beam Placement Rules
Does a roof adjacent to a public domain that is within ten handbreadths on the public-domain side but above ten handbreadths on the courtyard side require a fixed ladder before its owner may use it from the courtyard?
5 opinions
When a courtyard is breached into a public domain by more than ten amot (or its entire width), what is the legal status of the breach site and of the courtyard?
4 opinions across 3 eras
Is a breach at a corner of a courtyard (even less than ten amot wide) treated as a valid doorway, permitting normal use of the courtyard?
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Does the principle of 'pi tik ra yored v'sotem' (the roof edge descends and seals) apply to a breach in a house wall, permitting use of the house as if the wall were intact?
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Does pi tikra apply when the roof edge is slanted (as with typical sloped roofs)?
4 opinions
When a house wall is breached at a corner and the roof is also breached leaving only a diagonal strip, does pi tikra still apply to permit use of the house?
2 opinions
When a courtyard is breached at full width into the public domain, may one carry within the courtyard without restriction, or only within four amot?
2 opinions
Related from other topics
Do the tops of walls enclosing a reshut ha-yachid have the status of reshut ha-yachid even if less than four tefachim wide?
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Do techumin apply on a pillar above 10 tefachim tall that is 4x4 tefachim wide?
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Discussion
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