Fig. 4.16. Bearing stress in a beam on a continuous support with h/b > 2.5.

b distance a > 2/3h from the end of the member, as shown in Figure 4.16b, the conditions stated in together with equation (4.26) will still apply but lef will be as follows:

where h is taken to be the greater of h or 40 mm.

4.5.4 Torsion

When a member is subjected to torsion, shear stresses are generated across its section and from elastic theory, for solid sections, it can be shown that when the member is subjected to a torsional moment, T, the maximum torsional stress, rtor, and the angle of twist per unit length of the member, ft/1, will be as follows:

For a circular section 2T

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