Commentary for Eruvin 5:4

אלמה אמר רבי אילעא אמר רב רחבה ד' אע"פ שאינה בריאה ואם יש לה אמלתרא אפי' גבוהה יותר מעשרים אמה אינו צריך למעט

Then<span class="x" onmousemove="('comment',' Supra n. 13.');">⁶</span> why did R'Il'a state in the name of Rab [that if a cross-beam was] four [handbreadths] wide [it constitutes a proper gateway] even though it is not strong enough,<span class="x" onmousemove="('comment',' To carry the weight of an ariah (a small brick hall' the size of an ordinary one) , v. infra 13b.');">⁷</span> and if it had a cornice there is no need to lower it even if it was higher than twenty cubits? - R'Joseph replied: [The ruling about] the cornice is that of a Baraitha.<span class="x" onmousemove="('comment',' Not that of Rab himself. Hence there is no contradiction between Rab's own statements.');">⁸</span>

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