Fb - Reference design value for bending

S - *Section modulus of member

Cd - Load duration factor

Cm - Wet service factor

Ct - Temperature factor

Ci - Incising factor

CL - Beam stability factor

Cf - Size factor

Cfu - Flat use factor

Cr - Repetitive member factor

TEF - Time effect factor

*For a rectangular bending member with neutral access perpendicular to depth at the center, Section modulus, S = (bd^2)/6;

b = width, d = depth

M'(ASD) - the adjusted moment

M'(LRFD) - the adjusted moment