New in 2013 is our “FR” series NEMA 16A Cable Ladder, Bends, Risers and Tees, certified to AS3013:2005 appendix B Classification WS5X (2 hours). Unistrut is the only manufacture to fully comply with this current standard across the full range of the new "FR" series Nema 16A cabale ladder and shaped accesories as at 19th of March 2013.