Originally Posted by
Ian Latchford
I am designing a sub floor structure of WF16 x 36 L=30.
Like Bruce, I know the "W" means "wide flange", the "16" is the depth of the beam, and the x36 means it weighs 36 pounds per linear foot, and I am presuming the L=30 means the length is 30 feet long.
But, like Bruce, I am not familiar with the "F" part either.
Be that as it may, you should leave the designing to the structural engineer.