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ESR-2528 Page 5 of 19 <br />APPENDIX A <br />Design Considerations for High Wind Applications <br />Under The 2015 IBC and IRC and the 2012 IBC and IRC (ASCE 7-10) <br />2015 and 2012 IBC: Table 1507.3.7 of the 2015 and 2012 <br />IBC provides prescribed installation requirements for <br />concrete and clay roof tiles applicable to ultimate design <br />wind speeds (Vult) up to 130 miles per hour <br />(58 m/s). For specific regions of the country identified in the <br />2015 and 2012 IBC as being subjected to ultimate design <br />wind speeds (Vult) in excess of <br />130 miles per hour (58 m/s), the tiles and fastening systems <br />must be designed in accordance with this Appendix. <br />2015 IRC: On buildings located in areas where the 2015 <br />IRC ultimate design wind speed does not exceed 130 mph <br />(58 m/s) and having a maximum mean roof height of 40 feet <br />(12.192 mm), tile application must comply with 2015 IRC <br />Section R905.3.7. <br />2012 IRC: On buildings located in areas where the 2012 <br />IRC basic wind speed does not exceed 100 mph and having <br />a maximum mean roof height of 40 feet (12.192 mm), tile <br />application must comply with 2012 IRC Section R905.3.7. <br />For greater basic wind speeds and/or higher mean roof <br />heights, the tiles and fastening systems must be designed <br />in accordance with this Appendix. <br />The following design aids are provided to the roof designer <br />for consideration in determining the fastening requirements <br />for roof tiles for wind applications beyond the prescriptive <br />requirements in the IBC or IRC. These tables were <br />developed based on the requirements of 2015 and 2012 <br />IBC Section 1609.5.3 and ASCE 7-10. <br />Tables 3A through 3D of the Appendix are used to <br />determine the generic required aerodynamic uplift moment <br />for the tile. The generic required aerodynamic uplift moment <br />determined from the tables must be multiplied by the tile <br />factor ratio in Table 1 of this report to obtain the required <br />aerodynamic uplift moment for the specific roof tile being <br />installed. The allowable aerodynamic uplift moment for the <br />roof tile fastening system selected from Table 4 of the <br />Appendix must be equal to or greater than the required <br />aerodynamic uplift moment for the specific roof tile being <br />installed. <br />Underlayment Notes: For consideration of attachment of <br />underlayments in high wind areas, see 2015 and 2012 IBC <br />Section 1507.3.3.3, 2015 IRC Sections R905.1.1 and <br />R905.3.3 and 2012 IRC Section R905.3.3.3. Attachment of <br />underlayments must comply with the above-mentioned <br />sections. <br />TABLE 2 <br />Conversion from Nominal Design Wind Speed Vasd to Ultimate Design Wind <br />Speed Vult shall be converted as Vasd = Vult * √0.6 or from the following table: <br />Design Wind Speed Conversion (mph) <br />Vult 110 120 130 140 150 160 170 180 190 <br />Vasd 85 93 101 108 116 124 132 139 147 <br />For SI: 1 mile per hour = 0.44 m/s. A linear interpolation is permitted. <br />302 E Santa Clara Ave <br />9/25/2024