Hex-3
spaceframe: (three-way
hexagon and small triangle outer grid staggered over |
truncated triangle and small triangle inner grid) |
. |
Opening
up the triangulated lattice even further results in the Hex-3 spaceframe. |
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 |
 |
 |
click image to enlarge |
a) outer grid |
b) inner grid |
c) strut diagram |
. |
Fig. 244 - Hex-3 spaceframe
[demonstration model constructed with
small triangles (ST) ]* |
* can also be built with RT,
LT, or IT |
|
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Like the
Tri-3 and Tri-5 spaceframes from which it can be derived, the Hex-3 unit
cell is |
unstable. Theoretically three more bracing struts are needed
to stabilize it. |
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 |
 |
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Fig. 245 - Stability analysis
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of the Hex-3 unit cell |
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(demonstration model) |
click image to enlarge |
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a) M = 36 J = 15 |
b) M = 39 J = 15 |
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36 < 3 ( 15 ) - 6 |
39 = 3 ( 15 ) - 6 |
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unstable, need + 3 M |
stable |
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|
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Due to
the openness of the design, the Hex-3 spaceframe is useful for open
lattice structures |
such as
supports for stage lighting and displays. Also panels or skylights
can be inserted |
into the large openings in the inner and outer layers thereby stabilizing
them. |
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Back
to Knowhere |
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Page 140
- Building stability - Hex-3 spaceframe |
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