FAQ 000081 EN-US

# For support forces of a result combination, the maximum component is equal to zero. This cannot be true. The minimum force is alright.

The maximum support force of a RC is zero because the load combinations included in the combination are defined as Variable (potentially). Since all support forces of these LCs have the negative sign, the resulting RC has only a negative value. Thus, the other value is zero because it is possible that no LC is acting (therefore "potentially"). Zero as a maximum is greater than any negative value.

To solve this problem, you have to define the load combinations included in the RC as Permanent:
RC1 = RC1/permanent or RC2/permanent or RC3/permanent.

In this way, the load combinations 1 to 3 will be compared. The most unfavorable value always gives the minimum and the maximum result.

#### Keywords

result combination, RC, support force, support forces, criterion, permanent, variable