Profis Engineering is suggesting I need to use the SOFA design method for my baseplate application. What does SOFA mean?

SOFA is a Hilti design method for post-installed anchors that extends anchor design beyond situations explicitly covered by EN 1992-4. For example, the SOFA design method can allow for the design of larger or non-standard anchor groups, including arrangements beyond the layouts covered by EN 1992-4 and can be used to achieve a more realistic shear distribution in anchor groups close to a concrete edge.
It should also be noted that to achieve compliance with the SOFA design method, annular gaps between anchors and baseplates need to be filled. This can be achieved in practice with the Hilti filling washer set and additional resin such as HY200 or RE500.