I have designed a flitch plate beam to be used in a wood framed house, but am baffled by a phrase in an article, which I found trough this forum.
THe clear span is 13'1", loaded at 1470#/lf for a total of 19,228#. THe beam is (3)2x12 with (2)1/2" x 11" steel plates, held together by (2) 5/8"...