Section R. 400.8505 - DefinitionsRule 505. As used in this part:
(a) "Basement" means a story of a building or structure having 1/2 or more of its clear height below average grade for at least 50% of the perimeter.(b) "Combustible" means materials will ignite and burn when subjected to a fire or excessive heat.(c) "Conversion" means to alter the use of an existing building or room to a center.(d) "Existing building" means a structure or part of a structure not currently used as a center.(e) "Existing licensed center" means a center that was licensed December 7, 2006 and whose license continues uninterrupted.(f) "Exit" means a way of departure from the interior of a building or structure to the open air outside at ground level.(g) "Fire alarm" means a device used to alert the occupants of the building of fire or smoke conditions. The device shall be audible in all parts of the building used as a center.(h) "Fire alarm system" means an approved electrical closed circuit, self-supervised local system for sounding an alarm. The system is comprised of a central panel, manual pull stations near all outside exits, audible electric signal devices and, where warranted, a remote trouble annunciator. All system components shall be listed by a nationally recognized testing laboratory and installed in accordance with NFPA-72.(i) "Fire door assembly" means a side-hinged, labeled fire door and labeled frame constructed and installed in compliance with NFPA-80.(j) "Fire-resistance rating" means the time for an element in a building to maintain its particular fire resistance properties in accordance with NFPA-251.(k) "Fire-resistive construction" means a building having walls, ceilings, floors, partitions, and roof of non-combustible materials having a minimum fire-resistance rating of 1 hour. This subdivision does not prohibit finished wood floors, doors, and windows with assorted frames and trim.(l) "Flameproof materials" means materials that will not propagate flame under the test conditions of NFPA-701. Flameproof materials are usually combustible materials with the addition of some treatment or coating to modify their burning properties.(m) "Flammable" means materials capable of being readily ignitable from common sources of heat or at a temperature of 600 degrees Fahrenheit, 316 degrees Celsius, or less.(n) "Hazard area" means those parts of a center building housing a commercial kitchen, heating plant, fire-fueled water heater, incinerator, or an area posing a higher degree of hazard than the general occupancy of the building.(o) "Heating plant room" means a room or area housing fuel-fired equipment.(p) "Interior finish" means the exposed interior surface materials of walls, fixed or movable partitions, and ceilings. This includes drywall, masonry, or wood substructure and surfacing materials such as paneling, tile, or other interior finish material and any surfacing materials, such as paint or wallpaper, applied thereto. Interior finish includes materials affixed to the building structure as distinguished from decorations or furnishings.(q) "Means of egress" means a minimum of 36 inch wide continuous and unobstructed path of exit travel from any point in a building to the outside at grade.(r) "New construction" means a created structure, addition, replacement, or alteration of structural components, such as walls.(s) "Noncombustible" means materials that will not ignite and burn when subjected to fire.(t) "Protected ordinary construction" means all of the following types of construction: (i) Roofs and floors and their supports having a minimum of 1-hour fire-resistance rating.(ii) Exterior bearing walls or bearing portions of exterior walls are of noncombustible or limited combustible materials and have a minimum of 1-hour fire-resistance rating and stability under fire conditions.(iii) Nonbearing exterior walls are of noncombustible or limited combustible materials.(iv) Roofs, floors, and interior framing are wholly or partly made of wood of smaller dimension than required for heavy timber construction.(u) "Standard partition construction" means a substantial smoke-tight assembly consisting of walls, in conjunction with ceilings at which they terminate, that are covered on both sides with minimum standard lath and plaster or 1/2-inch drywall over 2"x 4" studs. Doorways in these walls are protected with minimum 13/4-inch flush solid core wood doors or 20-minute labeled fire-rated doors and equipped with approved self-closing devices and positive latching hardware. One or more glass panes are permitted in these walls and doors if each individual glass panel is fixed pane and not larger than 1,296 square inches of 1/4-inch wired glass with no linear dimension longer than 54 inches, or fire-rated safety glass of any size, listed with a minimum fire rating of 45 minutes and installed as listed. In some cases, drywall or plaster is also necessary to protect the underside of stairs.(v) "Textile material" means having a napped, tufted, looped, woven, non-woven, or similar surface.(w) "Wired glass" means glass not less than 1/4-inch thick, reinforced with wire mesh, number 24 gauge or heavier, with spacing not greater than 1 square inch.(x) "Wood frame construction" means that type of construction in which exterior walls, bearing walls and partitions, and floor and roof constructions and their supports are made of wood or other combustible material.Mich. Admin. Code R. 400.8505
2013 AACS; 2020 MR 23, Eff. 12/18/2019