The two main architectural systems of frame construction are ________________ a. the skeleton and the post-and lintel. b. the materials and the truss. c. the design and the architect. d. the shell and the skeleton.

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The two main architectural systems of frame construction are ________________ a. the skeleton and the post-and lintel. b. the materials and the truss. c. the design and the architect. d. the shell and the skeleton.

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The two main architectural systems of frame construction are the shell and the skeleton.