The 2009 and 2010 Ford F150 has been covered several times before on this site. Whenever I find some good images of the Boron and UHSS used in the F150 body structure I will post it. The safety cage in the 2010 F-150 made with hydroformed high-strength steel. There are continuous tubes that run from the A-pillar base through the roof rail to which forms the safety cage. The image below shows the the dual hydroformed front tubes.