Abstract Model Series 2015-2017 Abstract Model Series #1 (Asymmetric tower structure with rear buttressing and elevated cage) Abstract Model Series #2 (Symmetric Copper tower with central axis) Abstract Model Series #3 (Simple tower with hanging arms) Abstract Model Series #4 (Asymmetric trussed tower with planar buttressing) Abstract Model Series #5 (Simple trussed bridge elevated by crane with triangular base) Abstract Model Series #6 (Symmetric tower with 25 degree incline) Abstract Model Series #7(Rusted structure with simple bridge trussing) Abstract Model Series #9 (Asymmetric Tower with Interior Laced Lattice) Slide 1 Slide 1 (current slide) Slide 2 Slide 2 (current slide) Slide 3 Slide 3 (current slide) Slide 4 Slide 4 (current slide) Slide 5 Slide 5 (current slide) Slide 6 Slide 6 (current slide) Slide 7 Slide 7 (current slide) Slide 8 Slide 8 (current slide)