CHIMNEY STACK Russian patent published in 2001 - IPC

FIELD: building parts of chimney stack structure. SUBSTANCE: chimney stack has external casing and internal gas-escape shafts. Casing of chimney stack stretches through height of shafts above their center of gravity on side of non-displacement attachment floor of shaft. Spring-loaded sliding guides are uniformly arranged inside casing through its height; each shaft is provided with bottom collar loosely embracing gas flue coaxially running to shaft. EFFECT: reduced material input; facilitated mounting procedure; improved resistance of casing to wind loads. 2 dwg