Polymorf - Knowhere - Tri-6 spaceframe

Tri-6 spaceframe: (three-way hexagon and small triangle outer grid over three-way

large triangle inner grid)

The tri-6 spaceframe design is unique compared to the other spaceframes because it

cannot be sliced out of the octet truss. As a result, the Polymorf model of it is comprised of

several different types of panels.


click image to enlarge
a) outer grid	b) inner grid	c) side view
.
Fig. 246 - Tri-6 spaceframe [static demonstration model built with IT (blue), RT (green), ST (red), SS (orange) ]

[Note: The orange colored panels (bracing struts) shown in the above model are not used

in the real-life spaceframe. Instead the struts forming the large triangular inner grid

(shown green here) span from vertex to vertex in one piece.]

The stability analysis of the Tri-6 unit cell shown in Fig. 248 above reveals that it is stable.

Therefore so is the spaceframe (presuming of course that each strut making up the

inner large triangle grid is one solid piece instead of the jointed strut modeled here).

Tri-6 is suitable for short to medium spans.
Skylights can be inserted into the hexagonal
openings of the outer grid.

Fig. 249 - Boat slip with Tri-6
spaceframe cover ►
(scale visualization model)
click image to enlarge

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Page 141 - Building stability - Tri-6 spaceframe