Insulated Engineered Structural Member

An engineered structural member for use as, for example a stud, and a method for producing an engineered structural member, includes producing two flange members, preferably from nominal dimension solid lumber, providing slots in the flange members to receive opposite edges of a thin web, and assembling the edges of the web into the flange member slots to form an assemble engineered structural member. Preferably, an adhesive is used to bond the flange members to the web. An insulating material such as a rigid foam also may be arranged in the open spaces between the flange members at the exposed sides of the web to increase insulating capacity. The engineered structural member provides increased insulation capacity to a structure while reducing structure weight, improving strength and improving dimensional instability.