# D14.C.6.8 Combined Axial Tension and Bending

Members required to resist both bending moments and an axial tensile force shall be proportioned such that:

1. $T u T r + M u M r ≤ 1.0$

where
 Mr = ϕMp for class 1 and class 2 sections = ϕMy for class 3 and class 4 sections
2. $M u M r − T u Z p l M r A ≤ 1.0$ for class 1 and class 2 sections,

$M u M r − T u Z e M r A ≤ 1.0$ for class 3 and class 4 sections

where
 Mr = as defined in 13.5 or 13.6