Structure: The basis for the stiffness in triaxial fabrics is the locked intersection. In the above drawing, the first shows one yarn, for instance the blue one, being constrained from moving upward by the intersection of the red and green yarns. Expanding this intersection to two, now the blue yarn is constrained from moving vertically in either direction. Finally extending the locked intersection configuration to a full unit shows all the yarns constrained from moving in any direction. The locked intersection characteristics and how they affect the performance of triaxial fabric is determined by the size of the yarns and the pitch distance between them. By modifying either of these variables, an amount of extensibility can be designed into the woven fabric, giving a truly engineered fabric structure.

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Basic - Non-interwoven; Porosity: 33 1/3% The Basic pattern is the foundation of all triaxial fabric patterns. As this pattern is non-interwoven, meaning the red warp yarns are over all the green warps yarns and under all the blue fill yarns and so on, there is no comparable configuration in biaxial weaving as the material would fall apart. All the following patterns have either incorporated the Basic pattern or are a variation on this structure. This pattern is currently in production.
Stuffed Basic - Biaxially interwoven; Porosity: 14% By adding an extra filling yarn to the standard Basic weave, a more closed fabric configuration can be created. Samples are available for this construction.
Open Basic - Non-interwoven; Porosity: 48.15% By removing every third yarn from the Basic weave pattern in all three directions, the locked intersection is preserved allowing a more open, yet stable, configuration. Samples are available for this construction.
Basic Plain - Biaxially interwoven; Porosity: 21.9% By controlling the yarn advances during weaving a mixed construction of Basic triaxial weave and Plain biaxial weave can be created.
Bi-Plain - Biaxially interwoven; Porosity: 0.0% The Bi-Plain construction is currently the only closed weave pattern that can be woven using existing triaxial loom technology. It is also one of the weave patterns corresponding to the standard biaxial plain weave as the fill is over one, under one in each of the two warp directions. This pattern is currently on the TSI 2015 roadmap.