with beams or girders laid in two directions

Full Title

Floors; Floor construction with regard to insulation; Connections specially adapted therefor (elements for floors, e.g. bricks, stones, filling bodies, girders, E04C; flooring as finishing work, insulation of flooring, sectional false floors, e.g. for computers E04F15/00) > Load-carrying floor structures formed substantially of prefabricated units (E04B5/43 - E04B5/48 take precedence) > with beams or girders laid in two directions