'Cross beams' in the Bible

and he built the walls of the house on the inside, with boards of cedar, from the floor of the house, unto the cross-beams of the ceiling, he overlaid it with wood, on the inside, - and he overlaid the floor of the house with boards of fir.

And he built twenty cubits, at the hinder part of the house, with boards of cedar, from the floor as far as the cross-beams, - and he built it within, for a shrine, even for the holy of holies;

And there were cross-beams in three rows, and window was against window in three ranks.