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Fin Plate with slotted holes

Fin Plate with slotted holes

(OP)
Hello to all of you.

I have a doubt here and I would like to know what you all think about this.

In a project that we are here developing in Portugal we made a decision that has led to a great discussion in my office.

We are connecting a steel I beam to a slotted holes Fin Plate (easier to align/construct on the site). The slotted holes are transverse ones, ie, the greatest dimension is perpendicular to the shear force in the beam web. The bolts are snug tightened, no pretension at all.

My question is what will happen at the ultimate limit state? Will the bolts develop only a vertical force, or will they develop two sets of forces x and y like a normal sized hole fin plate?

You may find a scheme attached.

Thanks to all of you,
zackIX

“The most powerful force on the universe is compound interest.”

RE: Fin Plate with slotted holes

I am not an SE, but I fail to see how those fasteners could transfer a moment between the beam and plate, without any significant preload.

RE: Fin Plate with slotted holes

If the holes were not slotted in either direction, the bolt arrangement could resist moment. With the slotted holes, the bolts will slide horizontally and will not be able to resist the horizontal component unless they are made slip critical.

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