Patent ID: 6890003

Claim:
A trailer suspension subframe comprising: at least two beams each comprising a web portion positioned generally parallel to the web portion of an adjacent beam and a flange portion generally formed perpendicular to each web portion; a plurality of ribs attached to the at least two beams and positioned extending transversely between and generally perpendicular to the at least two beams; at least one hanger attached to each beam wherein each hanger comprises a monolithic body formed from extruded aluminum having a swing arm attachment portion and an integrally formed shock absorber bracket; wherein the trailer suspension subframe is made of aluminum; wherein the flange portion of each beam comprises at least one air spring support area; and at least one generally U shaped aluminum channel having a central portion and a pair of leg portions extending from the central portion, wherein each leg portion of the U shaped channel is attached to one of said plurality of ribs, and wherein the U shaped channel is attached to the at least two beams.