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BASE PLATE Design using RAM Connection

BASE PLATE Design using RAM Connection

BASE PLATE Design using RAM Connection

(OP)
Hi,

Have anyone tried base-plate design using RAM connection. Is it accurate? I like the way it is setup. The thing I am unsure of is "Strain Compatibility" option in RAM. I think assigning "Strain Compatibility" makes the base plate to behave rigid. The BP's I am designing has a thickness 2'' or more. Has anyone used "Strain Compatibility" option. Is this accurate? Strain Compatibility equations are not based on AISC Guide. What is this Strain compatibility based on?

Thanks

RE: BASE PLATE Design using RAM Connection

Yes the design is accurate. You are correct, the strain compatability option makes the baseplate rigid. They have several white papers regarding design of baseplates on their website.

RE: BASE PLATE Design using RAM Connection

(OP)
Hi Mike,

When to you consider the Base Plate to be rigid. My rule of thumb can I assume anything equal to or grater than 2'' as rigid? If yes, i can turn on the strain compability option for the base plate check right.

RE: BASE PLATE Design using RAM Connection

That sounds about right to me.

RE: BASE PLATE Design using RAM Connection

Rationally, I would think that rigidity would be based on a base plate cantilever to thickness ratio. I've heard a limit of five expressed on several occasions but have never really seen any definitive justification. Below a certain aspect ratio, one would think that the cantilever would behave as one panel of a strut and tie type system rather than as a flexural thing. If the aspect ratio for such a system in concrete would be about 2.5-ish, five in steel seems entirely plausible.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

RE: BASE PLATE Design using RAM Connection

I suspect this goes without saying, but I would also expect a "rigid" base plate to remain 100% elastic throughout its load history. You know, Sx vs. Zx.

I like to debate structural engineering theory -- a lot. If I challenge you on something, know that I'm doing so because I respect your opinion enough to either change it or adopt it.

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