Illinois Society of Architects · Chicago · leaf 319
tagonal interior masonrychimney having an inside diameter or leastdimension of more than thirty (30) inches,and every non-circular or non-octagonal in-terior masonry chimney having any interiorside dimension more than twentv-four (2 nInches, shall be provided with an independentlining and air space… … W//7///////.
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
