Section 51 in Haryana Urban Development Authority (Erection of Buildings) Regulations, 1979
51. Chimney stacks.
(a)Chimney stacks or smoke flues shall be carried upto 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 cm. thick. The maximum height for any stack may be exceeded if it is adequately secured against overturning.(b)Height of chimney stack may be reduced to 45 cm. when the roof is made upto fire resisting materials. The top six courses of all stack shall be built in cement mortar.
