Coming Soon, to your First-Due Area; Wide-Open (brand) Wood I-Beams.
Where designs call for premium floor or roof construction, heavy loads, or extended spans, Georgia-Pacific Wood I Beam™ joists are the answer. Lighter and easier to handle than ordinary lumber, Wood I Beam joists offer high strength and stiffness in lengths up to 60'.

The 16"-deep Wide Open series joists, intended for uniformly loaded residential floors, also feature pre-cut web openings for easier, faster installation of most mechanical services.
Look at the manner in which these engineered floor joists now make use of large (wide-open) cut outs to accomodate equipment runs, and also present further operational and safety challenges during fire operations..........

http://www.gp.com/build/product.aspx?pid=1390
More to be posted later.......