The four Beam Mounts are used to incorporate the beams and folding system into the F-22 main hull, eliminating considerable work, and the need for careful alignment of multiple surfaces and/or pivot points. Mounts are resin infused for optimum properties, then water jet trimmed, and include all associated special bushes and doubler plates. These Beam Mounts are unique to the F-22, and weigh less than 2kg (4.5lb) each. The end result is a better and lighter structural system and a more efficient way to install the Farrier Folding System.
Beam mounts are not required if buying the full F-22 production hull, already being incorporated.