Below is an image of a bolted beam splice connection that I'm working on.
RAM Connection considers the eccentricity of the bolt group to be 3.125in and the coefficient for eccentrically loaded bolt groups to be 8.
I believe that the eccentricity should be 6.25in and the coefficient should be approximately 3.5 (Table 7-7 from AISC360 15th edition; there isn't even an 8 option on this table given the parameters). Why does RAM connection select such a high coefficient for eccentrically loaded bolt groups? Why doesn't RAM consider eccentricity of the bolt group to be related to the adjacent bolt group?
Thanks
What version are you using? I checked a beam splice like this in 13.09.00.163 using AISC 360-16 LRFD and my C value (e.g. for bolt shear) is 5.45 which matches what I get from the table 7-7 using the 3.25" e and n=4. If you have any good example from AISC that clarifies the eccentricity location we can take another look at that.
I'm using version 13.08.00.246.
Maybe the version I'm using is changing the C value somehow. I'll try to download the update and see if that helps.
AISC states that the eccentricity location is the horizontal distance from the centroid of the bolt group to the line of action of the applied load. Maybe RAM says that C = 8 because it considers the centroid of the bolt group/applied load to be at a different location?