Wis. Admin. Code Department of Safety and Professional Services SPS 318.1804
Substitute the following wording for the requirements in ASME A18.1 section 4.1.1: Stairway chairlifts shall be installed so that the required means of egress is maintained as required in the building code. For new installations, the egress width shall be measured with the stairway chair lift in the unfolded, usable position. For replacement of a previously approved stairway chair lift, the egress width may remain as it has been with the original lift in place, but may not be reduced by the replacement.
Wis. Admin. Code Department of Safety and Professional Services SPS 318.1804
Stairway chairlifts complying with this section may be installed as a convenience for individuals but are not recognized by the building code as providing accessibility due to the inability of a wheelchair user to use them without assistance.