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Subp. 2. Dual purpose storm shelters. A dual purpose storm shelter must comply with other applicable requirements of the state building code for its other intended uses. STAT AUTH: MS s 168.59 to 168.73 HIST: 12 SR 2251; L 1987 c 71 s 2 Current as of 05/01/97 1370.0140 PLANS, SPECIFICATIONS, PERMITS. Storm shelter plans, engineering calculations, diagrams, and other required data must be prepared by a registered architect or engineer licensed to practice in Minnesota. For permit procedures, see section 106 of the Uniform Building Code, incorporated by reference in part 1305.0010. STAT AUTH: MS s 16B.59 to 16B.73 HIST: 12 SR 2251 Current as of 05/01/97 1370.0150 SPACE REQUIREMENTS. A minimum of four square feet per person must be provided within a storm shelter. A ceiling height of not less than seven feet must be provided over 60 percent of the floor area. STAT AUTH: MS s 168.59 to 16B.73 HIST: 12 SR 2251 Current as of 05/01/97 1370.0160 REQUIRED EXITS. Subpart 1. Exits; openings. At least two exits must be provided in compliance with chapter 10 of the Uniform Building Code. The second exit from a single purpose storm shelter may have an opening of at least nine square feet with a minimum of 20 inches in width and the bottom of the opening not more than 44 inches from the floor. Openings in the exterior walls of the shelter must be protected to prevent flying missiles from entering the interior of the shelter. Subp. 2. Handicapped access. At least one of the exits must comply with chapter 1340, facilities for the handicapped. Subp. 3. Exit to exterior. When a portion of a structure is designed as a storm shelter, one exit must be directly to the exterior of the building or to an exit system complying with the state building code. STAT AUTH: MS s 168.59 to 168.73 HIST: 12 SR 2251 Current as of 05/01/97 1370.0170 DRY INTERIOR. Provisions must be made to construct storm shelters outside