bluefire713
Structural
- Nov 14, 2024
- 1
I'm working on a building constructed in the late 1950's in Denver that's looking to make a modification to the roof structure, which is 6 ft wide, 14" deep untopped precast double tees. We've done some GPR have identified the number/pattern of strands and the layout of the flange reinforcing, but we're hoping to track down a design table if one exists. Some digging into industry articles and publications led me to George Hanson's article from PCI's "Reflections on the Beginnings of Prestressed Concrete in America: Part 6, Early History of Precast Concrete in Colorado," which states:
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It suggests that Prestressed Concrete of Colorado likely had span or load tables starting circa 1957, and I'm trying to hunt those down, as it's very likely the building was built around or shortly after those were developed. That's also the timeframe that Rocky Mountain Prestress came into being, so if anyone has any load/span tables from them (not sure if those exist) from the late 1950's/early 1960's, I'd be interested in those too.
Also, I am aware that PCI has a 6DT12 in their 1971 load tables. Unfortunately, the dimensions of our in-situ tees don't conform to those tables.
Thanks!
\It suggests that Prestressed Concrete of Colorado likely had span or load tables starting circa 1957, and I'm trying to hunt those down, as it's very likely the building was built around or shortly after those were developed. That's also the timeframe that Rocky Mountain Prestress came into being, so if anyone has any load/span tables from them (not sure if those exist) from the late 1950's/early 1960's, I'd be interested in those too.
Also, I am aware that PCI has a 6DT12 in their 1971 load tables. Unfortunately, the dimensions of our in-situ tees don't conform to those tables.
Thanks!
