raspinjački ram je strutting frame ili strut frame
http://www.califstructure.com/retrofit.asp?submenu=1
Retrofit design was developed to tie the superstructure spans together at each bent, transfer the load to the abutments and provide additional seismic resistance at the abutments through a strutting frame and a cluster of large diameter pile shafts at each abutment corner.
Krutost u ovom kontekstu je stiffness (a ne rigidity), ukrućenje je "stiffener".

http://books.google.com/books?id=_dyKGYwBE50C&pg=PA304&lpg=P...
... allowing the use of only one stiffening strut frame, which led to considerabe...