What is "gridirons"

Usage examples of "gridirons".

The fireplace was as big as a shed, and cast-iron shelves, roasting racks, and gridirons were suspended at various heights above the flames.

So does the ironmongery - candle-boxes, and gridirons, and that sort of necessaries - because those things tell, and mount up.

But never in his remaining years would he be able to run, jump, crouch, to be the Otto Beggs of West Coast gridirons and Korean battlefields again.