Pot Bearing Design

[bdp1974]

I amd trying to size the masonry (base) plate for a pot bearing and I was wondering if anyone had any tips that they could share. With the design that I have, the plate comes up thicker than most other plates that I see on plans. Any help would be greatly appreciated.

 

[Qshake]

What code are you using? Recall that loads with LRFD are heavier now so an increase in size wouldn't be out of the norm.

Just a thought.

Regards,
Qshake

Eng-Tips Forums:Real Solutions for Real Problems Really Quick.

 

[bdp1974]

We use either AASHTO Standard Design Specs or LRFD depending on the requirements of the project. A lot of times the plans will call out the thickness of the Masonry Plate, for instance maybe 1" thick. When we use our formulas, to see how it checks out, it shows that it should be 2 1/4" thick. We are trying to determine what design is used to get these smaller plates. Thanks for your reply.

 

[ishvaaag]

The response under plates partially loaded uses not to be uniform, so the tip of the cantilever parts use to take less than its share, that is less than a uniform pressure would give. You can check it with a plate FEM model on compression only springs, this can give lesser thickness sometimes. You might even further allow for some plastic redistribution of the determined standing loads, always checking how the things go at working service level, to not see ugly things.