Sõrestikud

Sõrestikud are structural frameworks composed of interconnected elements, typically straight members, that form a rigid structure. These elements are joined at their ends by nodes, creating a geometric arrangement that distributes loads efficiently. The most common form is a triangular lattice, as triangles are inherently stable geometric shapes. By forming triangles, sõrestikud can support significant loads while using relatively lightweight materials.

The primary function of a sõrestik is to provide structural support over spans that would be difficult or impossible to bridge with solid beams. They are widely used in construction for roofs, bridges, towers, and industrial structures. The design of a sõrestik depends on the specific application, considering factors like the expected loads, the span length, and the available materials. Materials commonly used include steel, timber, and aluminum.

The members of a sõrestik are typically subjected to axial forces, either tension or compression, which are more efficient uses of material compared to bending stresses experienced by solid beams. This efficiency allows for lighter and more economical structures. Different types of sõrestikud exist, each with its own configuration and application, such as Pratt trusses, Warren trusses, and Howe trusses, named after their inventors or structural characteristics. The analysis of sõrestikud involves determining the forces acting on each member, often using methods like the method of joints or the method of sections.