Uplift loads on a Platform Post

[cgstrucg]

Hello,

I am designing a platform stair system and for one of the load case, I am facing a strong uplift on one of the posts. We can't use a counterweight. Is there a way I can get rid of that uplift.

One way is to span a beam in the direction of a platform and create a positive connection. But then should that beam be designed for the uplift loads?

I have attached output results of the staad. Please let me know what you think about it and any suggestions would be appreciated.

Thanks.

 

[dik]

Unless I'm missing something 124# is not a lot of uplift. Can you cast the leg into a cubic foot of concrete?

Dik

 

[cgstrucg]

We have uplift of like 650#. It's right next to the 124# post and unfortunately we can't use concrete.

 

[CANPRO]

The base must be anchored to something, can you justify engaging any weight of the supporting structure?

Where is the uplift coming from? I assume this is a free-standing stair and the uplift is coming from a lateral load applied at the top. Can you brace the stair to something else and eliminate the uplift?

All else fails, make sure your column is at least 650 lbs.

 

[StrucDesignPE]

We have uplift of like 650#. It's right next to the 124# post and unfortunately we can't use concrete.

If you can't use concrete, then what kind of foundation are you using? What are the post bases secured to?