Thanks for your thoughts. I had actually previously reviewed the table you linked. And, like all of the other tables I'm finding online, none is actually addressing the question of a header dimension. This (and all the other) tables only address floor joist, ceiling joist, or rafter size requirements, based on the OC distances between the individual members, which actually spreads the load out. If I were simply putting a 10'4" clear span window opening into the wall, I wouldn't be able to add to the header material's thickness (it would need to match the wall's thickness), and I could easily understand the need for larger height (i.e.: 2x10) lumber. Since I have the option of actually using a triple 2x6 (a "6x6") or even a quadruple 2x6 (an "8x6") to span the opening, I would think that the 6" height dimension would suffice. Unfortunately, I have yet to find a table specifically noting header dimensions, based on load, that includes triple and quadruple dimension lumber. I may even have to consider using an engineered product to get the strength I need in the 6" dimension.
One table I reviewed stated that a single 2x6, with a 50lb/sf load, can span a 10'-6" opening. Figuring that as a basis, I thought that I could easily double or triple (or even quadruple) the 2x6, to strengthen the load bearing capacity.
Your thoughts on this?
Anyone else have an opinion?
Thanks again, fellow handypeople!!