korsstöd

Korsstöd, literally "cross support," is a structural element used to stabilize constructions by providing bracing in two directions. The term is used primarily in Swedish language contexts to describe cross-bracing or diagonal supports that resist lateral forces such as wind or earthquakes.

In practice, korsstöd typically takes the form of diagonal members that cross or run at right angles to main structural elements, forming an X or other polygonal patterns. They may be made of wood or steel and are connected to a frame at joints using bolts, nails, screws, or welds. The primary function is to prevent racking and to distribute loads more evenly, improving stiffness and stability without significantly increasing vertical load.

Applications include timber-framed houses and roofs, bridges and walls subject to lateral loads, and scaffolding where horizontal and vertical stability is required. In timber construction, korsstöd are often integrated with wall plates, rafters, and studs; in steel structures they may be part of moment frames or braced frames.

Design considerations involve material strength, member slenderness, connection details, and compatibility with existing load paths. Proper placement typically follows structural analysis to maximize resistance against expected lateral forces while avoiding interference with usable space and shrinkage or movement.

Historically, cross-bracing has been a fundamental method for improving rigidity in wooden and steel frameworks and remains common in lightweight and traditional constructions. See also cross-bracing, bracing, and scaffolding.