NOVELTY - The member has a wooden core (630) provided with perimeter and length, where the wooden core provides a support to a structure. A metal jacket (610) is attached to the perimeter of the wooden core, where the metal jacket spans entire length and connects the support to the structure. A composite mechanism is provided through interaction between the wooden core and the metal jacket to enhance strength and ductility of the wooden core and the metal jacket. The metal jacket wraps entirely around the perimeter of the wooden core to form a seal.    USE - Composite member e.g. stud wall, floor frame, roof frame, floor truss, roof truss (all claimed), composite joist, composite beam such as wood beam and metal stud beam and composite post/column, for providing support to a structure in a building gravity system in a commercial building and residential building. Can also be used for supporting electric power line, telecommunication cable line, light along street, flag, banner, traffic sign, space truss, like power transmission tower, wind turbine supporting structure, construction scaffold and stage truss segment.    ADVANTAGE - The wooden core provides lateral support for the metal jacket to prevent pre-mature local buckling failure of the metal jacket. The member is formed with pre-drilled circular holes on a metal sheet, thus allowing convenient nailing at field without additional drilling. The member is provided with a light gauge steel sheet that wraps around standard wood members to achieve exceptional structural performance.    DETAILED DESCRIPTION - The wooden core is made of solid nature wood, engineered wood or engineered plastic or foam. An INDEPENDENT CLAIM is also included for a method for using a composite member to provide support to a structure.    DESCRIPTION OF DRAWING(S) - The drawing shows perspective views of a composite post or column.    Metal jacket (610)    Composite post (620)    Wooden core (630)    Top plates (650-660)    Bottom plates (670-690)