Multi-channel measuring platforms allow the line of action of force of compression coil springs (used as valve springs or in MacPherson struts) to be determined. Standard testing systems equipped with a six or nine-component load measuring platform are used, permitting specific determination of the spring penetration points and the resulting load from the load components which are under compression when the spring is loaded. These characteristic values are important in assessing the  quality attributes friction, wear and life expectancy.