TgJ Ez40:37 :וְאַלוֹהִי לְדַרְתָא בָרָיתָא וְכוֹתְרָן עַל אַלוֹהִי מִכָא וֻמִכָא‏ : its ledges are toward the outer court with capitals on the ledges on each end
See the entire entry for kōṯrā, kōṯartā n.f. knob, capital