Section R. 400.18628 - ConstructionRule 628. A congregate facility constructed after the effective date of these rules, an addition made to a congregate facility after the effective date of these rules, and a building converted for use as a congregate facility after the effective date of these rules, shall be made of fire-resistant construction, except as follows:
(a) The construction, addition, or conversion may be 1-hour protected ordinary construction, solid masonry exterior walls, wood joist and studding, if it is not more than 1 story in height without the basement or attic and if it is protected throughout with an approved automatic sprinkler system.(b) Forming materials that are left in place as a part of the permanent structure shall be noncombustible. The forming materials shall not be more hazardous than class A materials as defined in R 400.18639(3).(c) In a building where a fire-resistive ceiling constitutes an essential part of a floor or roof assembly to meet the required fire resistance rating, it shall be installed as tested and may have openings to accommodate noncombustible piping, ducts, or electrical outlets. The aggregate area of the openings in the ceiling shall not be more than 16 square inches for each 90 square feet of ceiling area, unless the equipment was a part of the test assembly. All ceiling duct openings shall be protected with fire dampers as tested in the assembly.(d) All alterations shall be in compliance with these rules.(e) This rule shall not apply to a building which is attached to a congregate facility and which is not used in any fashion for facility purposes if the building is separated from a congregate facility building by an unpierced fire wall that has not less than a 4-hour-fire-resistance rating. This rule shall not apply to buildings that are not used in any fashion for facility purposes if located to provide a horizontal outside separation by distance from the building in accordance with recognized standards.(f) Additions to existing sprinklered buildings shall be separated from the existing building by fire walls and B-labeled fire doors, unless the addition is sprinklered.(g) An unsprinklered addition to an existing unsprinklered building of combustible construction shall be separated from the existing building by not less than a 15-foot breezeway that has a 1-hour fire separation at either end of the breezeway.(h) During remodeling, alterations, or construction of additions, building openings that are exposed to construction operations shall be protected by noncombustible material. Remodeling, construction, or alterations shall not obstruct or render unusable any required means of egress. Where any required means of egress is obstructed or rendered unusable due to any remodeling, construction, or alteration, a temporary means of egress shall be provided to assure the safety of occupants or else the area affected shall be vacated during such work.Mich. Admin. Code R. 400.18628