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Part B - Verifications and approval requirements 
The axial pile load capacity shall be demonstrated through conducting a sufficient number of 
dynamic pile load tests. When these tests are to be carried out depends on the forecasting 
method used. For further information, please refer to Appendix 3-111. 
Special verifications which are required for heavyweight foundations: 
• External stability against collapse (safety against tilting, sliding and bearing capacity fai 
lure), if necessary under consideration of a potential pore water excess pressure build-up 
• Subsoil loads through normal subsoil stress and limitation of the open gap and 
• Settling estimates under full load conditions and accumulated settling when subjected to 
cyclic loads. 
For special types of foundation (e.g. suction anchors, suction caissons), verifications shall be 
obtained in a similar way to that specified for pile and heavyweight foundations, in consulta 
tion with the BSFI. In this case, the BSFI may engage the services of suitable assessors. 
Suitable structural design criteria shall be defined for the deformation and shifting verifications 
based on the potential static and dynamic effects on the components and on the structure, 
e.g. max. permitted deflection and torsion at the pile head at the level of the seabed and at 
the pile foot, max. exploitation of the lateral bedding reaction of the subsoil and minimum or 
maximum values for subsoil stiffness. 
An expert assessment shall be conducted with regard to the effects of the following parame 
ters and how they can be practically considered in the verifications: 
• Installation of the foundation elements on the subsoil and foundation system, e.g. piling; 
driving aids 
• Positional shifts of the foundation elements 
• The exceeding of manufacturing tolerances 
• Deviations in piling depths. 
3.3.2.5.3 Verifications pertaining to the ability of the foundation elements to interact 
with the support structure 
For the support structure, in addition to the inclination forecast required in the serviceability 
verification, it shall be demonstrated that constraint stress exerted on the support structure as 
a result of potential differences in the shift of the individual foundation elements can be relia 
bly and sufficiently absorbed. Any resulting changes in the loads exerted on the foundation 
elements by the support structure shall be taken into account in the verifications for the foun 
dation elements. 
3.3.2.5.4 Geotechnical component tests 
In the case of deficient subsoil conditions, or where the respective foundation and design 
methods have not yet been sufficiently tested, the BSFI reserves the right to demand that 
comparable (with regard to the subsoil, pile geometry and installation procedure) foundation 
elements be manufactured in advance so that they may be tested for their suitability with re 
spect to their intended purpose. 
These examinations shall be conducted well in advance so that the results can be used in the 
design phase. Accordingly, the verified results are generally required to be submitted for the 
2 nd release.