Triangle is considered the strongest shape.
Compared to rectangular tubing, triangular tubing uses less material to achieve the same level of strength. Still, triangular tubing is not a standard profile in the market, as it is more difficult to work with angles. But for us, as designers, we found it challenging.
The main structure of the TRITUBE chair is a triangle aluminum extrusion profile. It is lightweight, stackable, and can be used both indoor and outdoor.