runkolähtöisiä

runkolähtöisiä is a Finnish term that translates to "frame-based" or "chassis-based" in English. It is most commonly used in the context of vehicles, particularly in the automotive and heavy machinery industries. The term describes a construction method where the vehicle's primary load-bearing structure is a separate frame or chassis to which other components, such as the engine, suspension, bodywork, and axles, are attached.

This contrasts with unibody (or monocoque) construction, where the vehicle's body itself serves as the structural element. Frame-based construction typically involves a ladder frame or a more complex space frame. This design is often favored for its robustness, durability, and ease of repair, especially in vehicles designed for heavy-duty use, towing, or off-road capabilities. Trucks, SUVs, and many buses commonly employ this method. The separate frame allows for greater flexibility in design and can accommodate different body styles on the same chassis. It also provides a strong foundation for carrying heavy loads.