Wikipedia
Hy-Rib was a brand name for a product manufactured by the Trussed Concrete Steel Company. It is an engineering reinforcement system for floors, walls, and ceilings of buildings and houses. This product is a derivative of the Kahn Trussed Bar for beams and columns that was invented by Julius Kahn. Kahn engineered the Hy-Rib products and they were first manufactured in 1909.
Hy-Rib is a steel encasement stiffened by rigid ribs used in reinforced walls, ceilings, and floors. They are helical hooping units of steel sheathing forms used in concrete, stucco and plaster. Hy-Rib products are a derivative of the "wings" used in the patented Kahn System of reinforced concrete, invented by Julius Kahn in 1903. The products are made from a single plate of steel. Hy-Rib products were used in concrete doors, ceilings, and roofs. It was also used in sidings, partitions and ceilings to eliminate channels. Hy-Rib producs were designed to take on plaster and cement to eliminate layout forms in the construction of buildings. The steel sheet form would be embedded with plaster or cement directly and would flow into the lath surface to attach itself to the steel and harden to secure the material into the steel.