gridiron
ˈɡrɪdʌɪən/
noun
noun: gridiron; plural noun: gridirons
1.
a frame of parallel bars or beams, typically in two sets forming a grid, in particular:
a frame of parallel metal bars used for grilling meat or fish over an open fire.
a frame of parallel beams for supporting a ship in dock.
(in the theatre) a framework over a stage supporting scenery and lighting.