agnoyes
Structural
- Jan 31, 2007
- 5
I have a project in Chattanooga TN that is classified as a Site Class C by shear wave velocity test to 2300 fps. However, by putting in a basement at -12'-0" below grade and updating the shear wave velocity test to discount the top 12' the shear wave velocity increases to 2600 fps and is then a Site Class B. The design team would like to utilize the site class B to eliminate various requirements necessary if it is a site class C. However they do not want a basement.
Therefore, if I design my structure starting from 12' below grade (drilled piers to bedrock) is it reasonable to use the lower base shear afforded by a higher site class B? I also would eliminate seismic ties as well.
Therefore, if I design my structure starting from 12' below grade (drilled piers to bedrock) is it reasonable to use the lower base shear afforded by a higher site class B? I also would eliminate seismic ties as well.