Patent ID: 6224704
Filing Date: 2001-05-01
Classification: B27B,B27M,E04C,Y10T

Abstract:
A method of making an engineered structural wood product having first and second components which comprises:selecting radially anisotropic pine or Douglas-fir plantation wood logs having relatively higher density and modulus of elasticity in their outer portions and relatively lower density and modulus of elasticity in their inner portions;machining the logs to segregate at least a portion of the relatively higher density outer wood from the relatively lower density inner wood;forming first components of generally rectangular cross section from the relatively lower density inner wood;forming second components of generally rectangular cross section from the relatively higher density outer wood, said second component wood being chosen from that having a modulus of elasticity of at least 9.6.times.10.sup.6 kPa; andrecombining the relatively higher density and relatively lower density components by adhesively bonding at least one strip of the relatively higher density second component to opposite edge portions of the relatively lower density first component to form a structural wood product in which the relatively lower density and modulus first component acts as the web portion of a beam and the relatively higher density and modulus second components act as the flange members of the beam.