A frame (10) is provided for an orthopedic brace having an upper frame assembly (12), a lower frame assembly (16), a first hinge (20) and a second hinge (22). 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 (24,38). The second side of the triangle is a first cross beam (12,16) which is substantially horizontal or diagonal. The third side of the triangle is a diagonal second cross beam (28,42).
