A barn stands 60 cubits from the edge of a city. Does it connect to the city's boundary?
Any structure within 70⅔ cubits of the city is merged with it, extending the boundary to include that structure. Even a barn counts.
Question 2
Two towns are 100 cubits apart. Are they measured separately or together?
Towns within 141⅓ cubits of each other (double the 70⅔ cubit standard) are treated as one city. Their residents share the same combined boundary.
Question 3
Your city is shaped like an L. How is its techum measured?
Irregular cities get squared off. The Rambam rules: draw the smallest square that contains the entire city, then measure 2000 cubits from the square's edges. The geometry is generous.
Question 4
A river runs along one side of a city. Is it included in the city's measurement?
A river along the city's edge is included in the city's area — measure from the far bank. This extends the city's effective size.
Question 5
Who may perform a techum measurement?
Only an expert surveyor's measurement is accepted. Approximate guesses — even careful ones by intelligent laypeople — are not relied upon for techum determination.