Appleton, WI Building Safety: Fire Sprinkler Requirements (2026)

Under Sec. 6-57(c), any building constructed or structurally altered must have an approved automatic sprinkler system when occupied for specific high-risk uses. Multifamily dwellings of three or more units exceeding 4,800 square feet per floor, and dormitories other than housing for the elderly, must protect every area of the building with a system complying with NFPA Standard 13, using residential-type sprinkler heads in the living units. Educational Group E occupancies trigger the requirement in basements, kitchens and shops handling combustibles, and in non-fire-resistive buildings of 10,000 square feet or more, two stories exceeding 6,000 square feet, or three or more stories.

Sec. 6-57(e) requires systems to connect to an adequate water supply with a minimum five-psi safety factor, and no sprinkler equipment may be installed or altered until electronic plans and calculations are submitted to the Fire Prevention division and conditionally approved. Sec. 6-57(g) requires every required system to be tested and inspected on installation per NFPA standards in effect at that time. Sec. 6-57(h) makes the owner or occupant responsible for keeping the system operative at all times, requires advance notice to the Fire Department before interrupting service, and requires testing and maintenance per NFPA Standard 25 with test results furnished to the Fire Chief.

Sec. 6-57(i) requires the water supply to come from the city water system, tested using the two hydrants closest to the sprinklered property. The Fire Chief may also apply the section retroactively to existing buildings found to pose a severe fire hazard under Sec. 6-57(d), and may approve alternative materials or methods under Sec. 6-57(f) if they meet the code's intent, subject to the Building Official's approval.