(under subclass 600) Structure wherein the module is thin and has one face with a continuous surface with at least two elongated ribs formed integral with and projecting outwardly of its opposed face, the width of the rib being substantially less than the width of the unit.
SEE OR SEARCH THIS CLASS, SUBCLASS:
248, for hoop tie engaging ribs on sections held by them.
319+, for a ribbed cast in situ barrier.
569+, for a ribbed slab arranged with their ribs in opposed relation.
603, for an unreinforced module with monolithic spacing projections. 611, for a block of generally T-shape cross-section.
