'Gate bar' in the Bible

Rise up, go up against a nation at ease,one living in security.This is the Lord’s declaration.They have no doors, not even a gate bar;they live alone.

“I will also break the gate bar of Damascus,And cut off the inhabitant from the valley of Aven,And him who holds the scepter, from Beth-eden;So the people of Aram will go exiled to Kir,”Says the Lord.