threated rod
threated rod
(OP)
How can i calculate the maximum allowed length for the 3/4" treated rod assuming a gravity load of 5 kN and the lateral load of 3kN on top of the plate.


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RE: threated rod
RE: threated rod
It somewhat more straightforward if you begin by choosing a length, calculating the moment and deflection due to the 3 kN lateral load, and then add the moment due to eccentricity to the primary moment and calculate the stress in the bolts. Compare that to the allowable stress to see where you're at. Then check the reduction in axial capacity due to buckling. I could point you to the buckling capacity equations from the AASHTO bridge design spec, but others can probably point you to sources will be more accessible to you.
The preceding assumes that the plate is held flat (it can move horizontally but not rotate). If it can rotate, nearly everything changes.
Rod Smith, P.E., The artist formerly known as HotRod10