baseplate/column in uplift

[oneintheeye]

how do you confirm capacity of simple column baseplate in uplift conditions. Uplift dived by 4 bolts (plus any prying force). Baseplate?

thanks.

 

[asixth]

I don't see how that configuration can work for a 610UB. The standard design for the 610UB is M30 anchors (1-1/4") a 25mm baseplate and this gives a capacity of 720kN??

I wouldn't be able to prove that a 25mm baseplate and transfer this force thru bending?

I'll dig out my AISC baseplate guidelines and green book and see where my calculations are going wrong.

I also wouldn't call up M30's, I would use M20's.

 

[rowingengineer]

Asixth,
Call me captain dangerous, please note that 700kN is for pure tension, if you were to combine in shear as required you bolt capacity will reduce the overall component strength.

Don’t ask me if you can develop the M30 bolts in the footing this I don’t know. Nevertheless the M20-24 rule only applies to 8.8 bolts, it would impose high construction tolerances to use 8.8/s for foundation bolts, in my experience M30 4.6/s are not uncommon.


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