Engineered lumber has become very popular for floor systems, roofs, beams, headers, and studs.   Engineered ”I-Joists” are sometimes called by the name of one of the developers of the product, Truss Joist ® or TJI ®.  Although we are not a dealer of that brand, we handle competitive products.  Likewise, LVL is often called “Microlam ®”.  Again we handle a competitive product.  Greatwood Lumber and Ace Hardware offers floor and roof drawings to your plans and can provide the expected engineering performance on each member.  We also supply LSL studs, Glulams, and Alaskan Yellow Cedar Glulams used for exterior applications.