Section R. 29.5909 - DefinitionsRule 909. General definitions. Sections 3.3(a), 3.3(a)(1), 3.3(a)(2), 3.3(b), 3.3.11.4, 3.3.11.5, and 3.3.11.6 are added to the FL/CL code as follows:
3.3(a) "Building" means any structure used or intended for supporting or sheltering any use or occupancy. 3.3(a)(1) "Important building" means a building that is considered not expendable in an exposure fire.3.3(a)(2) "Storage tank building" means a 3-dimensional space that is enclosed by a roof and walls that cover more than 1/2 of the possible area of the sides of the space, is of sufficient size to allow entry by personnel, will likely limit the dissipation of heat or dispersion of vapors, and restricts access for fire fighting.3.3(b) "Bureau" means bureau of fire services.3.3.11.4 "AST system" means a tank or combination of tanks, including the pipes that are connected to the tank, tanks, or ancillary equipment containment systems, if any, which is, was, or may have been, used to contain an accumulation of liquids and which has less than 10% of its volume, including the volume of the underground pipes that are connected to the tank, or tanks, beneath the surface of the ground.3.3.11.5 "Tank system" means an AST system or UST system.3.3.11.6 "UST system" means a tank or combination of tanks including the underground pipes that are connected to the tank or tanks or underground ancillary equipment containment system, if any, which is, was, or may have been, used to contain an accumulation of liquids and which has 10% or more of its volume, including the volume of the underground pipes that are connected to the tank or tanks, beneath the surface of the ground.Mich. Admin. Code R. 29.5909