A tile for forming a modular deck with like-configured tiles, the tile having a web having a planar polygonal upper surface and a lower surface, a web strengthening structure on said lower surface, and a plurality of peripheral edges, where at least one of the edges includes a male connecting portion having a lateral tongue extending from the peripheral edge, and at least one of the edges includes a female connecting portion defining a lateral recess in the peripheral edge. In one embodiment, at least three of the peripheral edges include either of the male connecting portions or the female connecting portions.