A truss is a framework of linear elements, triangulated for stability. The strength of this assembly is a function of its geometry, connections, end members. Architects know that a triangle will hold its shape under load. The superstructure's appearance should be a function of both the framework, the trusses plus their lateral bracing and the degree to which it is exposed to view. Once the members are sized to accommodate the various live and dead loads, the aesthetics are up to the architect.