Section 49(9) in Faridabad Complex Administration Building Rules, 1989
(9)Chimney stacks or smoke flues shall be carried up to a height not less than 1 metre and not more than six times the least width of the chimney above the adjoining roof and shall be built at least 10 centimetres thick excepting when pipe is used. The maximum height for any stake may be exceeded if it is adequately secured against over burning.
