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(SECTION 602 CONSTRUCTION CLASSIFICATION) 602.3 Type III:. Type III construction is that type of construction in which the exterior walls are of noncombustible materials and the interior building elements are of any material permitted by this code. (CHAPTER 7 FIRE-RESISTANCE-RATED CONSTRUCTION) (SECTION 717 CONCEALED SPACES) 717.2.1 Fireblocking materials: Fireblocking shall consist of2-inch nominal lumber or two thicknesses of 1-inch nominal lumber with broken lap joints or one thickness of %" wood structural panel with joints backed up, gypsum board, cement fiber board, batts of mineral wool insulation or other approved materials installed in such a manner as to be securely retained in place shall be permitted for compliance with the 10 foot horizontal fireblock walls constructed using parallel rows of studs or staggered studs. Loose-fill insulation material shall not be used as a fireblock unless specifically tested in the form and manner intended for use to demonstrate its ability to remain in place and to retard the spread of fire and hot gases. The integrity of fireblocks shall be maintained. 717.2.1 Double stud walls: Batts or blankets of mineral wool or other approved nonrigid materials shall be allowed as fireblocking in walls constructed using parallel rows of studs and staggered studs. (CHAPTER 9 FIRE PROTECTION SYSTEMS) (SECTION 903 AUTOMATIC SPRINKLER SYSTEMS) [F] 903.2.7.1 Group R-2: An automatic fire suppression system shall be provided throughout all buildings with an occupancy in Group R-2, other than residential care facilities, in accordance with Section 903. Exception: Buildings which meet all of the following conditions: 1. Maximum of two stores, counting a basement as a story; 2. Maximum of 12 dwelling units per fire area; and 3. Each dwelling unit shall have at least one door opening to an exterior exit access that leads directly to the exits required to serve that dwelling unit. (SECTION 904 ALTERNATIVE FlRE-EXINGUISHING SYSTEMS) 11