Definition of greatings

(Arthur Miller, "The Prophecy," in The Best...)

The debris of his other careers was piled everywhere ; a pile of wire cages for mice from his time as a geneticist and a microscope lying on its side on the window_sill , vertical steel columns wired for support to the open ceiling beams with spidery steel cantilevers jutting_out into the air , masonry constructions on the floor from the time he was inventing his disastrous fireplace whose smoke would pass_through a whole house , visible all_the_way up through wire gratings on each floor .

(Octavia Waldo, A Cup of the Sun....)

It squatted low and square upon the sidewalk with a heavy iron grating supporting a glass facade .