What conditions of height, width, and length must an alleyway meet to be permitted by a lechi or korah?
Synopsis
An alleyway permissible by lechi or korah must be at least ten tefachim high, no more than ten cubits wide, and at least four cubits long. If over twenty cubits high, a korah alone is insufficient without a marking; a lechi remains valid. If under ten tefachim, a carving of four cubits into the full width is needed.
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