I presume you are talking about the rails under the new floor?
They are made using what we call zintek which is a zinc coated steel.
When I took the pics the floor was still not finished and since the pics were taken I have added gussets from the ends of the cross rails to the inner rocker/sill panels. I presume this is what you are talking about?

Last edited by kiwiwilly; 12/19/2009 8:33 PM.

1959 Chevy Apache
1948 Chevrolet COE

Trucks are like womens handbags !! you can never have enough of them and they can carry all your worldly possesions