Slotted Holes & Eccentrically Loaded Bolt Group

[PMR06]

I have an office debate I would love to hear opinions on:

Slotted holes may be used without being slip-critical if the load direction is perpendicular to the slot. Does that imply that the eccentrically loaded bolt group table 7-7 for 0 degrees is valid with slotted holes? (load is applied perp to the slots)

 

[structSU10]

see the attached paper on extended shear tabs - he has a brief discussion about how the slots affect the deformation. It does mean the if you use the instantaneous center method it is valid, as in general force vectors will not line up with the slots.

 

[TDIengineer]

If the slots can only take load in the perpendicular direction, then I would say no, you can't use the eccentric load group table. The twisting action is taken out by the couple created from the 2 end bolts with loads parallel to the slot. I believe the values in table 7-7 consider the bolts restrained in both directions. And as you have stated, per J.3.2 if the connection is a bearing type then loads perpendicular to the slot only may be applied.