Abstract: In its preferred embodiment, the improved frame-supported membrane has a membrane of light-gauge, corrosion resistant nickel alloy construction, this membrane being suspended within a base-supported frame. The membrane-to-frame hanger is designed for easy installation and provides for radial expansion of the membrane relative to the frame, yet restrains the membrane against implosive force and earthquake shear. For some installations, the improved frame-supported membrane may constitute the chimney without need for there being further provided a circumferentially surrounding masonry chimney column. In any event such a masonry chimney column if provided may serve primarily merely as a wind shield for the improved frame-supported membrane.

Abstract: A chimney lining system is disclosed, in which a membrane, typically 60 mils thick, of corrosion-resistant alloy material is suspended within an external skeletal frame-work of less-expensive carbon steel. Hangers provide for radial expansion of the liner. However, inward movement of the hangers is restrained. Axially spaced circumferential corrugations located midway axially between where two membrane sections are stiffened, joined and connected to the framework, provide for axial expansion. The external framework is disposed within a tubular concrete chimney column. At several levels, grillages support the external framework from the wall of the chimney column. The structural grillages may bear upon load cells equipped to signal the build-up of sludge on the interior of the liner.

Abstract: A carbon steel (or other type) chimney liner is provided with an inner membrane of relatively light gauge steel which is highly resistant to corrosion and which is constructed to accommodate thermal expansion in any direction independent of the structure to which it is attached. The membrane and chimney liner include an annular space therebetween which is placed under a vacuum.

Abstract: An insulated metal chimney lining, having constant loading spring suspension from the chimney column, is provided at the lower portion of a brick chimney lining to form the breeching entry. To provide additional thermal expansion capacity, an expansion joint may be incorporated in the metal liner.