Joists which land on a binding joist are called bridging joists. His open-web steel joist, patented in 1924, was known as the Massillon Steel Joist. Joists on the ground floor were sometimes a pole (pole joist, half-round joist, log joist. The joists forming the well are the heading joist (header) and trimming joist (trimmer). Neoprene joist tape or u-shaped rubber spacers help decouple the subfloor from the joist. These concentrated loads are considered to act at the panel points of the Joist Girders. Her sisters also survived; they were found unharmed under a collapsed ceiling joist. The rim joist depth must match the I-joist size. They are placed as the struts for the trust, located next to the king joist. Macomber left Central Steel and founded the Massillon Steel Joist Co. in 1923. The basis of Macomber's steel joist design is still used today. KCS joist chords are designed for a flat positive moment envelope.