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C. In concealed spaces between stair 6.3 Show ICBO or UL approval number <br /> stringers at the top and bottom of for prefab fireplace. Log lighter <br /> the run and between studs along can only be used if included in the <br /> and in line with the run of stairs if fireplace listing. <br /> the walls under the stairs are <br /> unfinished. 6.4 Provide UL number and <br /> d. In openings around vents, pipes, manufacturer's installation <br /> ducts, chimneys, fireplaces and requirements for wood stove <br /> similar openings which afford a (brochure preferred). <br /> passage for fire at ceiling and floor 6.5 Specify mechanical ventilation <br /> levels, with noncombustible capable of providing five air <br /> materials. changes per hour in bathrooms, <br /> e. Seal all duct and pipe penetrations water closet compartments and <br /> through the garage fire wall with an similar rooms if required openable <br /> approved non-combustible material. windows are not provided. UBC <br /> f. In concealed space of a floor ceiling Section 1203.3. <br /> assembly draft stops shall be <br /> installed so that the space does not 6.6 In lieu of required exterior openings <br /> exceed 1,000 sq. ft. Draftstopping for natural ventilation,a mechanical <br /> shall divide the concealed space ventilating system may be provided. <br /> into approx.equal areas. Such system shall be capable <br /> of providing two air changes per <br /> 6. MECHANICAL hour in guest rooms,dormitories, <br /> habitable rooms in public corridors <br /> 6.1 Indicate method of heating the with a minimum of 15 cubic feet per <br /> addition in accordance with County minute of outside air per occupant <br /> Ordinance No.3180. during such time as the building is <br /> occupied. Provide an engineered <br /> 6.2 Show the locations of the water ventilation system for such rooms. <br /> heater and heating/cooling UBC Section 1203.3 <br /> appliances. <br /> 13 <br />