spændbåndsbjælke
A spændbåndsbjælke, often translated as a tie beam or collar beam in English, is a structural element used in timber framing, particularly in roofs and floors. Its primary function is to resist outward thrusts from rafters or joists and to connect opposing structural members, preventing them from spreading apart. In a roof structure, spændbåndsbjælker are typically placed horizontally across the peak of a roof, connecting opposing rafters. This connection helps to prevent the walls from being pushed outwards by the weight of the roof and the forces of wind and snow. Without a spændbåndsbjælke, a roof without internal support would tend to collapse outwards.
In floor construction, spændbåndsbjælker serve a similar purpose, connecting opposing joists to maintain their spacing and