Abstract: A structural panel includes perimeter rails and parallel joists having top and bottom surfaces lying in common parallel planes. Between the joists and the rails are diagonal planar bridge members extending obliquely in zigzag manner such that an end of one of the bridge members butts an opposed end of a next one of the bridge members at a side face of the joist. Planar top cover sheets bottom cover sheet are adhesively bonded to the top and bottom surfaces of the rail members, bridge members and joists. When used in a modular building, the floor has sufficient stiffness for the module to be transported from an assembly location in finished condition with all interior and exterior cladding attached and with the walls are topped by finished sandwich ceiling panels. The roof structure spanning the assembled modules is built on at the installation location.

Abstract: A structural panel includes perimeter rails and parallel joists having top and bottom surfaces lying in common parallel planes. Between the joists and the rails are diagonal planar bridge members extending obliquely in zigzag manner such that an end of one of the bridge members butts an opposed end of a next one of the bridge members at a side face of the joist. Planar top cover sheets bottom cover sheet are adhesively bonded to the top and bottom surfaces of the rail members, bridge members and joists. When used in a modular building, the floor has sufficient stiffness for the module to be transported from an assembly location in finished condition with all interior and exterior cladding attached and with the walls are topped by finished sandwich ceiling panels. The roof structure spanning the assembled modules is built on at the installation location.