Introduction

One of the methods of making an eruv in certain mavois (alleyways) is to erect a korah accross the entrance. A korah is essentially a beam that must fit to certain specifications. This mishnah will begin to enumerate the physical dimensions necesary for a korah to be valid.

Hebrew Text

English Translation

The beam which was mentioned, it must be wide enough to hold an ariah, and an ariah is half a brick of three tefachim.

It is okay for the beam to be a tefach wide so that it can hold the ariah sideways.

Explanation

According to this mishnah, a korah must be at least one tefach wide. Other issues relating to the korah will be addressed in later mishnas.