Definition of grillage in US English:



  • A heavy framework of cross-timbering or metal beams forming a foundation for building, especially on soft, wet, or unstable ground.

    • ‘To prevent this central space from overheating, the glass is protected by an external grillage of fixed wooden louvres.’
    • ‘The structural grillages may bear upon load cells equipped to signal the build-up of sludge on the interior of the liner.’
    • ‘All of the steel grillages and columns that were left in place or incorporated into the new structure were sandblasted to remove accumulated rust.’
    • ‘All exposed steel parts of the grillages were protected by a three-coat paint system.’
    • ‘Without the luxury of any preexisting steel columns to work with, crews placed the building on a grillage of cast-in-place concrete beams set on base isolators.’


Late 18th century: from French (see grille, -age).