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<br /> <br /> <br /> <br /> <br /> <br /> air gap of 1/4 inch must be provided between the radiant barrier and the root' <br /> deck above at the center of the span. A minimum 3/4 inch air gap must also <br /> be provided between the radiant barrier and the ceiling or insulation below. <br /> 8.1.2.2. The radiant barrier shall be stretched with the shiny side facing <br /> down between the top cords of the truss and stapled or otherwise secured at <br /> each side. A minimum air space of 1/4 inch above and below is required. <br /> 8.1.2.3. For attic installations only, the radiant barrier shall be stapled or <br /> otherwise secured to the bottom surface of the top cord of the truss and <br /> draped below with the shiny side facing down. A minimum air space of 1/4 <br /> inch above and below is required. <br /> 8.1.2.4. For open beam ceiling construction only, the radiant barrier shall <br /> be laid on top of the roof deck with the shiny side facing up and a <br /> minimum 1/4 inch air gap between the radiant barrier and the roofing <br /> material above. The roof slope must be greater than or equal to 14° from <br /> horizontal. <br /> 8.1.3. At least one square foot of free area for ventilation shall be provided per 150 <br /> square feet of attic floor area, or in the case of vaulted or open-beam ceilings, per <br /> 150 square feet of ceiling area. In vaulted or open beam ceilings, the air space shall <br /> be vented with vent area approximately evenly distributed between the top and the <br /> bottom. In vaulted ceilings, vents shall be provided for each air space between <br /> rafters." <br /> <br /> (7) Amending Table 402.1.3. Footnote b is added to Table 402.1.3 to read: <br /> <br /> <br /> "TABLE 402.1.3 EQUIVALENT U-FACTORS a <br /> <br /> Climate Fenestration Skylight Ceiling Frame Wall Mass Floor Basement Crawl <br /> Zone U-Factor U-Factor U-Factor U-Factor Wall U-Factor Wall Space <br /> U-Factor U-Factor Wall <br /> U-Factor <br /> 1 1.2 0.75 0.035 0.082 0.197 0.064 0.360 0.477 <br /> 2 0.75 0.75 0.035 0.082 0.165 0.064 0.360 0.477 <br /> 3 0.65 0.65 0.035 0.082 0.141 0.047 0.360 0.136 <br /> 4 except 0.40 0.60 0.030 0.082 0.141 0.047 0.059 0.065 <br /> Marine <br /> 5 and 0.35 0.60 0.030 0.060 0.082 0.033 0.059 0.065 <br /> Marine <br /> 4 <br /> 6 0.35 0.60 0.026 0.060 0.06 0.033 0.059 0.065 <br /> 7 and 8 0.35 0.60 0.026 0.057 0.057 0.033 0.059 0.065 <br /> a. Nonfenestration U-factors shall be obtained from measurement, calculation or an <br /> approved source. <br /> b. Including framed floors and knee walls." <br /> <br /> <br /> <br /> <br /> 5 <br />