Abstract: The present invention provides a truss system that can quickly and easily be field-assembled, through the interconnection of modular panels to form flat and box structural trusses. This system is intended for use across a broad spectrum of applications within the construction and home-improvement industries. At the heart of the invention is the panel composed of a metal tube or equivalent frame solidly connected at all four corners and a one piece structural web where triangular and/or arched geometric patterns are cut, stamped, or formed from sheet metal or equivalent material. The geometric patterns are often disguised within decorative patterns. The web is solidly anchored to the interior face of the frame on all sides. The assembled panel serves as a truss bay. When two or more panels are connected together in the same plane, or in multiple planes for box configurations, a structural truss is formed.