Todd Fatheree wrote:

I'm working on a garage design. For a span greater than 9 feet, our
local
code requires two 2x12s sandwiched around a 1/8" steel flitch plate. I'm
curious where one would obtain a 17-18' long steel plate 11.25" wide.

With today's engineered beams, the above sounds like very old technology
to me.

Think I'd do a little more research.

Lew