A frame is provided for an orthopedic brace having an upper frame assembly, a lower frame assembly, a first hinge and a second hinge. The first and second hinges dynamically connect the upper and lower frame assemblies. The upper or lower frame assembly includes a truss unit which defines a triangle. The first side of the triangle is a substantially vertical longitudinal strut. The second side of the triangle is a first cross beam which is substantially horizontal or diagonal. The third side of the triangle is a diagonal second cross beam.
