DeltaStrand lumber is  a new structural composite lumber product developed at  AEWC . DeltaStrand is made from four-foot long logs which are reduced into triangular strands approximately 3/8” high/wide which are reconstituted into a structural composite using exterior-grade adhesive. The triangular shape allows for satisfactory consolidation of the composite in spite of the relatively large strand size, thereby minimizing void space and increasing density. Unlike existing SCL products which rely on significant densification of low-to-medium density species to achieve their enhanced mechanical properties, TSL can be made from higher density hardwood species such as maple, birch and beech, all abundant in Maine’s forests. Initial testing has projected design values that will allow TSL to compete in the SCL market. 

Allowable design values for DeltaStrand lumber are presented in an ICC Evaluation Report.

Publications

• Edgar, R. 2003 Effects of Strand Geometry on Selected Properties of Long-Stand Structural Composite Lumber Made from Northeastern Hardwoods

 Factsheet

• DeltaStrand Triangular Strand Lumber (TSL) Poster

Research Partners

• Federal Highway Administration

• United States Department of Agriculture - Wood Utilization Research

Center Contact

• Russell Edgar, Wood Composites Manager

  Russell.edgar@umit.maine.edu

   

  207-581-2101 

Graduate Student

• Ken Fortier