A Master extrusion profile that meets the basic requirements.  See this Link for a discussion of requirements.

Subsets and rotations of the master profile.

An assembly (bundle) of extrusions that slide together to produce a "2x4" top and side ratios.

A bundle may be bended and or twisted.  The fact that each extrusion slides independently greatly reduces the flexural modulus of the bundle.  A post gluing operation will lock the bundle into a final shape.

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A very dense and very strong start of a tree.

A spiral footing or hand rail of a staircase. 

Refer to the Patent for a more detailed description of the technology.

Note: for some materials, heated air through the bundle may be needed to produce the desired bend and twist.

The moment of inertia of the master profile in the x and y axis will determine the forces required for bending and twisting of the bundle.