Patent ID: 7946094

Claim:
A topside beam comprising: an upper topside beam comprised of an upper web beam, an upper left wing beam and an upper right wing beam, wherein a section of the upper web beam has a shape of an inverted “L”; the upper left wing beam and the upper right wing beam are oppositely connected to both sides of the upper web beam, respectively, at positions adjacent to a lower end of the upper web beam; and the upper left wing beam inclines downwardly in respect to the upper web beam, the upper right wing beam and the upper web beam form an angel of 90°; a lower topside beam comprised of a lower web beam and a lower right wing beam, wherein the lower right wing beam is connected to a right side of the lower web beam at a position adjacent to an upper end of the lower web beam, and the lower right wing beam inclines upwardly in respect to the lower web beam and is parallel to the upper left wing beam; and the upper left wing beam and the lower right wing beam are tightly connected by a connecting member.