a plastic modular conveyor belt of the type which is capable of traversing lateral curves , with module rows collapsing together at inner sides of curves , has a solid deck over a central portion , but leaving terminal ends of interdigited projections not covered by the deck structure . the solid decks on each module are above the level of the interdigited projections , such that upon traversing curves the projections toward the inside of the curve can slide under the deck of the adjacent module , and the dimensions of the solid decks allow the inner edges of the module rows to collapse substantially fully without limitation by the edges of the decks , which do not lap over one another . the gap between module rows in straight belt travel is mostly closed by the interdigited terminal portions of the projections . in some embodiments the edges of the decks include interdigiting finger structure to provide a more continuous load - supporting surface .