Anyone have 6' wide precast single tee load tables from early 70's?

[Gordy2]

I'm trying to determine the allowable load on precast single tee's from 1971, the designation is 6T 36L-14.8. They have a 2" topping but the original drawings do not indicate whether it was composite or not.

The First Edition PCI Design Handbook (1971) doesn't cover 6' wide tee's. Any help would be appreciated.

 

[JedClampett]

My suspicion is that they just formed a 8'-0" double tee with a smaller flange. So it would be conservative to use the same psf loading.
In my PCI book, there's a 148 D1 under the 8ST36+2. The allowable load varies depending on span.

 

[dik]

They actually had a single T with a wider web... I'll see if I can locate an earlier book.

Dik

 

[JedClampett]

Sorry, I meant single tee.

 

[msquared48]

Did you try calling Concrete Tech in Tacoma, WA?

Mike McCann
MMC Engineering

 

[Gordy2]

I knew what you meant Jed. Interesting idea, thank you. It seems possible though that the concrete controls and using the design load for an 8' wide tee would not be conservative. The span on these is 80'.

Assuming an 8' wide tee, these would have a live load capacity of 41 PSF. That seems low for this building, I don't know what the original use of the mezzanine was but it was an automotive manufacturing facility.

Mike, I just talked to Stress Con in Kalamazoo, MI (project is in Grand Rapids, MI) and they have a brochure from close to the same time period.

 

[Gordy2]

Turns out these tees are good for 82 PSF superimposed load. I don't have a table for composite, which I believe these are, so at least it's conservative. Let me know if you want a copy of the table.