77 Ill. Adm. Code 350.4010
Construction Types
Section 350
Section 350.4010Â
Construction Types
a)Â Â Â Â Â Â Â Â Buildings shall be of fire resistive, protected
noncombustible, one hour protected ordinary, one hour protected wood frame,
heavy timber, or unprotected noncombustible type construction. (B)
b)        Buildings shall be no more than two stories in height. Basements
are permitted for use as resident living and activity areas. Basements are
also permitted for resident dining and sleeping areas if they are dry, have a
window area which is at least ten percent of the floor area, the window sill
height does not exceed a maximum of three feet above the floor and there are
two approved exits to grade level. Attics are not permitted for any kind of
resident use. However, both attics and basements may be used as storage space
and for various staff use functions such as offices, and sleeping quarters.
c)Â Â Â Â Â Â Â Â Any ICF/DD of 16 Beds or Less which shares a common wall with
any other occupancy must be separated from that occupancy by a minimum of one
hour rated fire wall. (B)