AISC table 7-7 to 7-14

[SteelPE]

I can't seem to find anywhere in these tables where the specify the required bolt hole size for this table. Can I use SSL holes with these tables or do I need to use STD holes?

 

[topsisu]

Based on specification section J3.2 Size and Use of Holes, Shorts slots could be used if the connection is slip-critical. In a bearing connection short slots needs to be transverse to the direction of loading. This isn't practical in my opinion.

 

[ToadJones]

Given that eccentric shear on the connection results in shears that might not be perpendicular to the slot I would think using anything but std. holes in conjunction with these tables might not be a good idea.
But, pg 7-18 in the Black Book references slip critical as a limit state which implies that the tables can be used for Short Slotted holes using the appropriate Rn value in the equation.
After all, the table is really just based on the geometry of the connection.

 

[SteelPE]

I agree with the statement that if the bolts are in bearing that the holes need to be STD holes. I was just wondering is there was a specific requirement that I was overlooking that would allow SSL holes.

 

[ToadJones]

I think you can use the tables as long as you use the appropriate "rn' values from the earlier tables.

 

[connectegr]

The tables will work for any bolt value. For slotted connections the eccentricity should be considered to the most extreme point. Selection of slots vs standard holes, is a separate issue. Other factors effect the transfer of horizontal forces. Obviously if connection forces include an axial load parallel to the slot, then slip critical bolts should be used. Oversized holes must be slip critical. For large eccentricities with bearing bolts, the performance of slots is another discussion. And there are several research papers on this topic.

http://www.FerrellEngineering.com