(225 ILCS 705/26.13) (from Ch. 96 1/2, par. 2613)
Sec. 26.13.
All hoisting shafts, air shafts, and escapement shafts
constructed after March, 1910, shall be of fireproof construction, and if
poured concrete is used in said construction it shall be not less than 6
inches in thickness. Cage guides and buntons may, however, be constructed
of wood. Drifts and slopes must be fireproof for a distance of 300 feet
from the entrance.
(Source: Laws 1955, p. 2012.)
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