dimensionering

Dimensionering is the process of determining the size, shape, and tolerances of components and systems so that they meet functional requirements, safety standards, and manufacturability. The term is commonly used in Swedish engineering practice and aligns with the general concept of dimensioning or sizing in engineering disciplines. Dimensionering encompasses selecting dimensions such as cross-sections, lengths, diameters, and overall geometry, as well as tolerances and fits between parts.

The main objectives of dimensionering are to ensure adequate strength and stiffness, acceptable deflections, prevention of buckling and fatigue, and reliable serviceability in the intended environment. It also considers production, assembly, maintenance constraints, and overall cost. Dimensionering must work within applicable codes, standards, and design criteria, and it often involves trade-offs between weight, safety, and performance.

A typical workflow includes: defining the function and loading conditions, selecting materials, establishing design criteria and standards, performing calculations to verify capacity under worst-case scenarios, checking stiffness and deflection, assessing buckling and fatigue life, determining tolerances and fits, and iterating to optimize weight and cost. The process is supported by documentation of assumptions, calculations, and results.

Common methods used in dimensionering include analytical calculations based on classical mechanics, numerical simulations such as finite element analysis, and rule-based checks derived from standards (for example Eurocode, ASME, or regional codes). CAD tools often integrate dimensioning and geometric dimensioning and tolerancing (GD&T) to control production and assembly.

Dimensionering spans civil, mechanical, and piping design, and underpins the reliability and safety of structures, machines, and systems throughout their service life.