These are department rules in addition to the requirements in IBC chapter 31: Mausoleum structures shall be designed, constructed, and maintained in accordance with chs. SPS 361 to 366. Mausoleums shall be classified as a Group S-1 storage occupancy and shall be constructed of reinforced concrete or other materials of similar durability.
Wis. Admin. Code Department of Safety and Professional Services § SPS 362.3100
Section 157.12(2) (d), Stats., reads as follows: "A mausoleum shall be constructed to last as long as possible, taking into consideration the technology and economics applicable to mausoleum construction at the time of construction."