Patent ID: 8919633

Claim:
A method for assembling a turbine, the method comprising: placing a middle layer between a first and second outer member, wherein the middle layer comprises a non-continuous layer of material and the first and second outer members each comprise a member of continuous material; welding a primary joint between the middle layer, first outer member and second outer member, the primary joint extending through the first outer member, the middle layer and at least a portion of the second outer member; and welding a secondary joint between the middle layer and first outer member subsequent to welding the primary joint, the secondary joint extending through the first outer member and at least a portion of the middle layer, wherein the secondary joint overlaps at least a portion of the primary joint on a first side of the primary joint; welding a tertiary joint between the middle layer and first outer member subsequent to welding the primary joint, the tertiary joint extending through the first outer member and at least a portion of the middle layer, wherein the tertiary joint overlaps at least a portion of the primary joint on a second side of the primary joint, the second side opposite the first side.