H

where:

0M.z is the equivalent uniform moment factor for buckling about the y-y axis; is the equivalent uniform moment factor for buckling about the z - z axis;

NOTE: The expressions for pty and fiz can result in negative values.

(3)P The equivalent uniform moment factors /3M y and /JM z shall be based on the shape of the bending moment diagram about the relevant axis, between points that are braced in the relevant direction, as given in table 6.3. The bending moments taken into account shall include the additional moments AAfy Sd and AMz due to possible shift of the centroidal axes.

(4)P The equivalent uniform moment factors j3M y and jSM z shall be determined from table 6.4.

Table 6.3: Relevant axes for determining /?M factors

Factor

Diagram of bending moments applied about axis:

Lateral buckling about axis:

System length taken between points braced in direction:

0 M,y

y - y

y - y

z - z

0 M,z

z - z

z - z

y - y

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