grillage

Etymology
Originated 1770–80 from.

Noun

 * 1) A foundation of crisscrossing timber or steel beams, usually for spreading heavy loads over large areas.

Etymology 1
Originated 1730s from.

Noun

 * 1) trellis (of wire or plastic); wire netting

Etymology 2
Originated 1740's from.

Noun

 * 1) grilling