Historic Concrete Strength ASCE 41

[Corey7320]

I am working on a seismic retrofit of 1930s-1940s era concrete buildings for the Dept of Veterans Affairs (VA). We have the original construction drawings but they only refer to Type C and Type B concrete. We are doing material testing but ASCE 41 dictates different amount of testing required depending on if you know the original design strength or not. It also plays into the knowledge factor used i beleive.

Is the Type C or B designation a standard from the time period or a standard for the VA at that time?

I have not been able to find reference to any documents that may have dictated the VA construction practices of the time like they now have

 

[bridgebuster]

See the ACI forum for my reply