Perpendicularity measurements
Perpendicularity measurements according to NEN-EN 1090 (the European standard for steel and aluminium structures) are checks used to verify whether the angles of structural components and cut plate ends meet the permissible dimensional deviations. They are essential for structural safety and fit.
The standard divides these measurements into two main categories defined in EN 1090-2 (Chapter 11 and Annex D): [1]
Tolerances on the structure (geometric tolerances)
These are the functional and fundamental dimensional deviations of the finished product (for example, the straightness of columns and the perpendicularity of assembled beams or frames). The maximum permissible deviation depends on the type of structure and the chosen Execution Class (EXC). Example: The general tolerance for the perpendicularity of an angle in some components is maximum relative to the nominal angle.
Tolerances on thermally cut edges
When steel or aluminium is machined (with laser, plasma, or oxy-fuel), EN 1090-2 sets strict requirements for the perpendicularity and roughness of the cutting edge.
At Materials Testing Veendam, perpendicularity is measured on a cross-section.
