8/7/2010 Agrifiber +25%. Structural Composite Lumber (SCL) +30%. FSC certified Stave Lumber Core (SLC) + 45%. One point of caution: to get the coveted MR6 Rapidly Renewable credit materials meeting this criteria must be 2.5% of the value of all building materials in your project to get the credit.
Structural composite lumber is defined by the APA – The Engineered Wood Association as “a family of engineered wood products created by layering dried and graded wood veneers strands or flakes with moisture-resistant adhesive into blocks of material known as billets which are subsequently resawn into specified sizes”.
29/5/2018 Stave lumber cores are assembled using blocks or strips of wood that are from the same species. This creates a durable core that is lighter in weight than particleboard. Stave lumber cores are not used as frequently in recent years due to the introduction of structural composite lumber cores which provide similar durability at a lower cost.
Typical constructions are as follows: Particleboard-Small particles of wood and wood fiber that are bonded together with synthetic resin adhesives cured under heat and pressed into a rigid panel in a flat platen press. Stave- A solid core of wood blocks or strips. Structural Composite Lumber-Strands of wood