STRUCTURES
STRUCTURES
In the same way that the elemental S/Z joint
aggregates to form basic joinery, and the join-
ery combines to form assemblies, assemblies
aggregate to create four basic structures.
The basic types of structures are: Shear, Tor-
sion, Vierendeel, and Rotational.
When used individually or in combination in
each AtFAB furniture piece, these four struc-
tures efficiently utilize flat material to resist ver-
tical, gravity loads and sideways, lateral forces.
FIGURE 2-29
Shear
SHEAR
Diagonal distribution of loads at the corner
legs. Shear structures resist lateral forces that
are applied to the side of a piece of furniture
and also prevent downward gravity loads from
forcing legs to splay outward. The shape of
the tapered legs in the 5-30 Minute Chair and
the One to Several Table, among other AtFAB
pieces, resist the shear forces that come from
being moved around and from downward
weight.
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DESIGN FOR CNC
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