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csd72, The base will be on both leveling nuts and 4 inches of non-shrink grout. This is really the only way we can provide a flat enough surface for the bearing. Thanks for your help.

dhengr, Here is a sheet showing the reactions at the pinned boundary conditions. The axis is 7.5degrees off of the page centerline, but I have marked them so it should be easy to see how the reactions bear out what we have been discussing. Normally our company does conveyors and transfer towers...

The reactions at the boundary conditions I set up, bear out what you have said. The "bolt" reactions alternate between really high and really low loads with of course compression at the front and tension at the back. Only about half of the bolts are taking the majority of the loads, and the half...

I don't know if this will work, but here is a couple of pictures of the model to give an idea of what it looks like. I have put them into a word document, but again I am not even sure this will work. I can't get a better view since I am sure my boss would not appreciate me sending out details of...

I have a model, and I will try and get a picture of it uploaded here so everyone can at least see it, and maybe follow my rambling description. I will see what I can get done. I may have more time to figure it out later tonight. We are working with Rotek and Kaydon. I picked one of the Kaydon...

Sorry, I suppose more information would help. This is a stacker/reclaimer. The feed conveyor comes in at the top of this machine at 80' above grade. A stacker boom with a 116' boom is at 65' and counter balanced to 95% of DL and material load. The stacker booms sits on a bearing to allow it to...

Thanks for all your help.

Well, this structure does ride on the inner race of the bearing with all of the torque being applied to the outside race and into the concrete foundation as the structure slews. The moment that the bearing is exposed to is the force of the structure above in an unbalanced condition. The...

I believe what the bearing people want is the moment that the bearing will be exposed to. All bolts will be the same size though.

I was able to find it. Thanks a lot. Looks like I have some reading to do.

Yes the moment is the in-plane. The reactions I have roughly 75% of the bolts in compression and the rest in tension. A neutral axis can easily be identified. Someone here suggested that I simply use the bolts with the highest tension and compression, set them at the diameter of the bolt group...

I am designing a large structure that rotates on a large bearing. In order to order a bearing I have to have the horizontal loads, vertical loads and a moment. I have been designing trusses and transfer towers for conveyors, and so normally getting these loads would be straight forward; but as...