a framework of beams laid crosswise, used as a support or foundation, as for a building on soft ground
Origin of grillageFr, wirework, grating, frame from grille: see grille
A network or frame of timber or steel serving as a foundation, usually on ground that is wet or soft.
Origin of grillageFrench from Old French trellis from greille gridiron ; see grill .
Originated 1770–80 from French grillage.