Circular steel plate

[Thoughtclaw]

Hello all. I've been asked to design a steel plate to support a 12'0" tall water tank with a 10'0" diameter. The framing has already been designed by others, but the tank manufacturer has said we need to put a plate under it. There is a 6x6 angle down the center of the frame (very rough sketch attached).

I've calculated that the water will weigh 748.8 pounds per square foot, and based on AISC Table 3-12, with a 5'0" span, that would seem to indicate we'll need a 7/8" plate. I feel like we shouldn't need anything nearly that thick, but am so far unable to come up with a way to justify anything thinner. Can anyone give me any ideas?

 

[Thoughtclaw]

Apparently my file didn't properly attach. Trying again.

 

[JoelTXCive]

Try this software.....it has a 30 day trial period and is super easy to use. In 20 minutes, you can be up and running...

https://www.iesweb.com/vp/index.html

 

[dik]

Are you designing the bottom plate in flexure? or as a tension element?... can you introduce a second angle to break the span up into thirds rather than halfs? Is the toe of the angle or the flat of the angle welded to the plate?

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[Thoughtclaw]

Thanks so much, Joel. I was able to figure it out with the software.

Dik, thanks for your questions. I designed it as a flexure element. The flat of the angle will be welded to the plate.

 

[dik]

Can you add another angle and break it down to 3 span... likely the plate will get thinner.

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[XR250]

@dik,

What does this mean?

"So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates"

I googled it and found nothing.

 

[dauwerda]

https://en.wikipedia.org/wiki/Technological_singularity

https://en.wikipedia.org/wiki/John_H._Coates

 

[dik]

The statement was in one of my son's eMails, and I thought it was great, so I used it. He was unhappy about that until I purchased the right to use it.

"singularity —is a hypothetical point in time at which technological growth will become radically faster and uncontrollable, resulting in unforeseeable changes to human civilization."

So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik