# D4.B.6.4 Members Subject to Combined Forces

## Axial compression and bending

The member strength for sections subjected to axial compression and uniaxial or biaxial bending is obtained through the use of interaction equations. In these equations, the additional bending caused by the action of the axial load is accounted for by using amplification factors. Clause 13.8 of the code provides the equations for this purpose. If the summation of the left hand side of these equations exceed 1.0 or the allowable value provided using the `RATIO` parameter (Refer to
D4.B.7
Design Parameters), the member is considered to have failed under the loading condition.