Terms are used a little differently internationally. However with that said typically "mass timber" is the catch all for both engineered and non-engineered timb

Terms are used a little differently internationally. However with that said typically "mass timber" is the catch all for both engineered and non-engineered timber. CLT is the engineered product taking taking most of the limelight right now. It is only differentiated from glulam (glue laminated timber) by the layering. In CLT layers are perpendicular where glulam they are parallel. Glulam has been around a little longer and is more suited to posts and beams due to its linear nature where CLT is used for structural panels also. There are also plenty of other less glamorous engineered timber products that have had a major impact in construction including timber I beams and OSB (Oriented Strand Board) panels. If anyone is really interested in timber from forestry to bulding products I recommend looking at the Gifu Academy of Forest Science and Culture which is the only institution i know of that runs the gamut of forestry, environmental education, craft and furniture making, and wooden architecture