וַיָּ֜מָד אֶת־אֻלָ֥ם הַשַּׁ֛עַר מֵהַבַּ֖יִת קָנֶ֥ה אֶחָֽד׃
He measured also the porch of the gate toward the house, one reed.
Rashi on Ezekiel
And he measured the hall of the gate from inside inward of the gate.
Rashi on Ezekiel
one rod The thickness of the right and left walls upon which the hall was founded.