The Shabbat Limit on Travel [Techum]: Measuring the Techum
Finding the Border of the Town
Considering a temporary Bedouin camp as a town, or as individual tents: Eruvin 55b
Considering a town which borders a steep drop a town, or individual housing units: Eruvin 61a
Where the measurement begins for a city which has an uneven border: Eruvin 52b-53a, 55a
How to measure for a city which is shaped like an archer's bow: Eruvin 55a-b, 57b, 61a
Where the measurement begins, for a walled city which was settled before the wall was built: Eruvin 26a
When they square off the edges of the town for measurement, they make the sides match the North/South/East/West directions: Eruvin 56a
How to count outward when squaring off a town which is a circle rather than a square: Eruvin 56b, 57a
[Not] Considering a city guard's hut (Burginin) capable of extending the Techum in Bavel, where periodic flooding destroys the hut: Eruvin 21a, 55b
[Not] Considering a city guard's hut (Burginin) capable of extending the Techum outside Israel, where thieves destroy the hut: Eruvin 21a, 55b
Considering three-walled, unrooved structures a part of the town, to start the measurement from there: Eruvin 52b-53a, 55b
Considering two-walled, rooved structures a part of the town, to start the measurement from there: Eruvin 55b
Considering bridges a part of the town, to start the measurement from there: Eruvin 52b-53a, 55b
Considering grave monuments a part of the town, to start the measurement from there: Eruvin 52b-53a, 55b
Considering a synagogue a part of the town, to start the measurement from there: Eruvin 55b
Considering a house of idolatry a part of the town, to start the measurement from there: Eruvin 55b
Considering stables and warehouses a part of the town, to start the measurement from there: Eruvin 55b
Considering a houseboat a part of the town, to start the measurement from there: Eruvin 55b
Considering a house on an island a part of the town, to start the measurement from there: Eruvin 55b
Considering a cave a part of the town, to start the measurement from there: Eruvin 55b
Considering fences, elevated bird-coops, and cisterns a part of the town, to start the measurement from there: Eruvin 55b
Measuring the 2000 Cubits
Requiring an expert surveyor: Eruvin 58b
What happens if surveyors disagree: Eruvin 58b, 59a
How exact we are on the 2000 cubits: Eruvin 52b [2x], 61a, 105a
The length of the rope used in measuring: Eruvin 57b, 58a
The material of the rope used in measuring: Eruvin 58a
At what height the surveyors hold the rope: Eruvin 57b
Is the 2000 cubit radius a square or a circle: Eruvin 49b, 51a
Testifying from a Childhood Memory
to mark off the Techum for Shabbat: Ketuvot 28a
Who is credible to say where the Techum ends: Eruvin 58b, 59a
How to measure if one needs to incline the measurement rope over an obstacle: Eruvin 35b, 57b, 58a-b
How to measure a mountain within the Techum: Eruvin 35b, 57b-58a, 58b
How to measure through an obstacle, where one is supposed to do that: Eruvin 58b
How to measure a valley within the Techum: Eruvin 57b, 58a-b
What happens if the 2000 cubits from one's location end in the middle of a town: Eruvin 42b, 60a, 60b-61a
What happens if the 2000 cubits from one's location end at the edge of a house's roof: Eruvin 42b
What happens if the 2000 cubits end in the middle of a cave: Eruvin 52b, 61a [2x]
What happens if the 2000 cubits end in the middle of a valley or mountain: Eruvin 57b-58a, 58a-b
An additional 70 2/3 cubits ["Karfeif"]
Giving a town a border area of 70 2/3 cubits, aside from the 2000 cubits: Eruvin 57a-b, 76b; Succah 8a
Giving two towns a distance of 70 2/3 cubits outside the towns [a "Karfeif"], aside from the two thousand, thus linking the towns: Eruvin 55a-b, 57a-b
Giving two parts of a town which has been split apart a distance of 70 2/3 cubits toward each other: Eruvin 55a-b
Two towns which are so far apart that there is a gap of 141 1/3 cubits between each outer one and a middle town: Eruvin 57a-b
Linking two towns together via a house which is within 70 2/3 Cubits of each town, where that house is of less than 4*4 Cubits: Succah 3b
Linking two towns together via a hunter's hut which is within 70 2/3 Cubits of each town: Succah 3b
Other Issues
What a person should do if he doesn't know where the Techum is: Eruvin 42a
What we do if we find that the edges of the marked Techum are uneven: Eruvin 58b, 59a
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