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  1. greggriffin

    Natural Gas Pipe Seismic Exclusions

    When is natural gas piping excluded from Seismic restraint in an occupancy category III building? Am I allowed to use either 12" rule or the pipe size exclusion (2" and smaller)?
  2. greggriffin

    Calculate N (Blows per foot) to get Site Class

    Muscog, I do not know what R&C is. The methods mentioned for obtaining N values are either solid or hollow stem continuous flight augers. I have attached an updated file with my interpretation of the equation you gave me above. With the current method I am using, I do not understand how it...
  3. greggriffin

    Calculate N (Blows per foot) to get Site Class

    MSUCOG, I have tried your Nave method and found drastically different results. I have attached an excel file with all of my given borings. Can you help me out with determining a total N_ave for the...
  4. greggriffin

    Calculate N (Blows per foot) to get Site Class

    Thank you very much. Your Nave equation is exactly what I am looking for. I am aware of the other methods for determining site class, but they were not used in this geo report. There are multiple borings for the building footprint and I will take the total average of the site area. I would...
  5. greggriffin

    Natural Gas Pipe Seismically Exempt?

    I want to follow IBC 2006 regulations. In summary, 'Is a pipe used to transport high hazard material allowed to use either or neither of the 12" rule or small pipe size exemptions?'
  6. greggriffin

    Calculate N (Blows per foot) to get Site Class

    I have a geotechnical report that gives N (blows per foot) values down to 20 ft. One boring went down to bedrock at 23 feet. All borings record N measurements at 1, 3, 5, 7, 10, 15, and 20 ft. In order to obtain site classification, I need an average N value for the top 100 ft. IBC 2006...
  7. greggriffin

    Natural Gas Pipe Seismically Exempt?

    Is a natural gas pipe inside/outside a building allowed to be exempt from seismic bracing if it is less than 2-1/2" in interior diameter and/or mounted less than 12" from top of pipe to supporting structure?

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