Suggest making California design for abutments on LEAP to follow this Live Load Distribution memo. All abutments in California must be designed using the following Live Load Distribution method or it would not be acceptable per Caltrans standards.

https://dot.ca.gov/-/media/dot-media/programs/engineering/documents/bridgedesignmemos/11/202404-bdm1105liveloaddistributionforabutmentdesign-a11y.pdf