Is an eruv valid if placed in a locked tower whose key was lost, or buried under a rockslide before Shabbat?
Synopsis
The eruv is valid if it can be retrieved without performing biblically prohibited labor, even if retrieval requires effort.
More in Carrying on Yom Tov
Is an eruv techumin placed in a cemetery valid?
3 opinions
Is an eruv techumin placed in a beit hapras (field plowed over a grave) valid, even for a Kohen?
1 opinions
Is an eruv placed on top of a reed or giant reed (kaneh/kandas) growing from the ground valid?
2 opinions
What happens if an eruv techumin placed at the end of the boundary rolls within or beyond four cubits?
1 opinions
If the eruv was lost, burned, became impure (as terumah), or rolled beyond four cubits — does timing (before or after nightfall) affect its validity, and how is doubt resolved?
1 opinions
What is the primary method of acquiring an eruv techumin and what are the requirements for food quantity?
3 opinions
May an eruv techumin be sent via an agent, and who is qualified to serve as agent?
2 opinions
If one says to another 'go make an eruv for us' without specifying a direction, and the agent picks a direction — is it valid?
1 opinions
Related from other topics
If a three-cornered tallit has three tzitzit placed on it, and then a fourth corner is created and tzitzit added, are all four tzitzit valid?
How to Tie Tzitzit
Why is 'Ata Chonein' (the blessing for wisdom/understanding) placed first among the middle blessings of the Amidah?
Holiday and Fast Additions to Prayer
Must one inspect a tallit for valid tzitzit before wearing it on Shabbat in the public domain?
When to Wear Tzitzit
Does one need to check that all four tzitzit are present and valid before going out on Shabbat?
When to Wear Tzitzit
If one discovers on Shabbat that tzitzit are invalid, was one liable for a sin offering if one already went out before the discovery?
When to Wear Tzitzit
If a tallit tears from the tzitzit hole downward, are tzitzit that were on it before the tear still valid? What if the tear occurred before the tzitzit were affixed?
Transferring and Repairing Tzitzit
Discussion
Discussion coming soon.
The Daily Law
One question. Every opinion. Every morning.
A new halakhic question and the full spectrum of rabbinic thought, delivered daily.