I am running version OBM Ver 10.08.02.45 and I can find the Skew Solids button for piers, however I do see the button for abutments only?
Can we log an enhancement for this? At the moment, the skew can only apply to abutment, not to piers.
Hmm....This option available for piers/pier caps. Here is an example with rectangular pier cap.
What kind of Pier Cap are you working with? There maybe some limitations for certain pile caps.
What I found was, if I used any of the first few templates from 'Multi Column' and made the Cap Type 'Tapered', OBM would not give me the 'Apply Skew' option under 'Substructure Placement Rule', if the Cap Type was 'Rectangle' it would be fine.