In the past 20 years or so the shift from standard floor support to wood
based "beam" support is probably now the norm.
What is the correct term for the type of support beams that uses a pair of
2x4's and OSB between them?
A few years ago, one of the home building shows showed these things and the
guy who made them said, you tell us how much the house weighs, we will tell
you how wide the OSB has to be.
Installing them is a one man job instead of the need for a small crew and
probably a crane.