Section 6 Safety factors and allowable stresses

6.1.1 The various components of mooring systems are to have, as a minimum, the safety factors given in Table 7.6.1 Safety factors.

6.1.2 These safety factors assume adequate regular inspection and/or renewal. Higher safety factors may need to be considered if:

1. The linkspan is outside protected waters (see Pt 1, Ch 2, 1.2 Application 1.2.3), or

2. the in-service operational wind, wave and current loadings are likely to be frequently exceeded, or

3. regular and adequate inspection and maintenance procedures may not be followed.

6.2.1 The allowable stress criteria defined in Pt 3, Ch 5, 4 Design criteria will be appropriate for any fabricated components forming part of a tethering arrangement.

6.2.2 The stress factors to be used in calculating the allowable stresses for load cases 1, 2 and 3 are given in Table 7.6.2 Stress Factor, F.