Ceiling or wall having improved fire resistance and method of installing the same

Abstract From the Canadian patent

A ceiling of wall for a partition structure that contains framing members has the usual sheets of wallboard applied side-by-side to the framing members so that seams exist between the edges of adjacent sheets. Improved fire resistance is derived from runners which extend between the framing members directly behind the seams so as to serve as fire stops and as additional support for the wallboard sheets. Each runner is at its ends attached to the framing members between which it extends and further consists of several components which slip relative to each other, so that the length of the runner remains constant even though its components experience thermal expansion. This prevents the …