One benefit of 1 ¾″ thicknesses of Microllam LVL is they allow easier installation when creating a much larger beam section. For example: 4 separate pieces of 16″ deep Microllam can be hoisted into place individually to create a 7″ wide beam, instead of having to lift a solid section 7″ x 16″ beam.
Whether lifting the plies into place individually or constructing the beam on the ground, there are given connection details to be followed in creating a multi-ply member. General connection info can be found in this article. Specified connectors include nails, proprietary screws and 1/2″ diameter bolts.
The question of whether adhesive should also be applied between the plies often arises. Protective coatings/sealers on Weyerhaeuser products will hamper the effectiveness of adhesive. In addition, there are a wide variety of adhesives available. Due to these factors, adhesives should not be used for load transfer purposes in a multi-ply member.