Section 375.32. Smoke pipes.

 

(1)  No smoke pipe shall pass through any floor, outside window or door, nor through any combustible roof or combustible outside wall, nor through any closet, attic or similarly concealed space.

(2)  Every smoke pipe passing through a non-fire-resistive partition shall be encased with incombustible material at least 4 inches thick or with a double safety thimble made of 2 concentric rings of sheet metal with at least one inch open air space between and with outer ring covered with at least 1 / 4 inch asbestos.

(3)  No part of any smoke pipe shall be placed nearer to any combustible partition or wall than the diameter of the pipe, nor nearer to any combustible ceiling than one and one-half times the diameter; but the above distances may be reduced by one-half, if the wall or ceiling is covered with not less than 1 / 4 inch asbestos board covered with galvanized sheet metal, or with equivalent protection as specified in s. SPS 375.11

1-2-56 ; renum. and am., Register, September, 1974, No. 225 , eff. 10-1-74; correction made under s. 13.93 (2m) (b) 7., Stats., Register, June, 1995, No. 474 ; correction in (3) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672 .

Note

The double thimble is of no value unless it is kept free from dirt. The best protection is a casing of solid masonry, with 1/4 space between the masonry and the pipe. Microsoft Windows NT 6.1.7601 Service Pack 1