4 
Content 
2.4.2.1.2 Monitoring of the production phase (steel structures) 44 
2.4.2.1.3 Monitoring of the production phase (concrete structures) 46 
2.4.2.1.4 Monitoring of the production phase (grouting) 48 
2.4.2.1.5 Monitoring of the production phase (cast components of the support 
structure) 48 
2.4.2.2 Monitoring of the commissioning phase 49 
2.4.2.3 As-built report 50 
2.4.3 Documents to be submitted when applying for operating release 50 
2.5 Operating phase 51 
2.5.1 Preliminary remarks 51 
2.5.2 Technical codes of practice 51 
2.5.3 Requirements and required verifications 52 
2.5.4 Documents to be submitted 53 
2.6 Decommissioning phase 54 
2.6.1 Preliminary remarks 54 
2.6.2 Technical codes of practice 54 
2.6.3 Requirements and required verifications 55 
2.6.4 Documents to be submitted when applying for decommissioning release 56 
2.6.5 Documents to be submitted in order to close the decommissioning phase ... 56 
3 Foundation elements 57 
3.1 Preliminary remarks 57 
3.2 Development phase 59 
3.2.1 Technical codes of practice 59 
3.2.2 Requirements and required verifications 59 
3.2.3 Documents to be submitted for the 1 st release 59 
3.3 Design phase 59 
3.3.1 Technical codes of practice 59 
3.3.1.1 Hierarchy of codes 59 
3.3.1.2 Codes of practice for loads 60 
3.3.1.3 Codes of practice for dimensioning and implementation 60 
3.3.2 Requirements and required verifications 61 
3.3.2.1 Safety verification concept and procedures, level of stability against 
collapse 61 
3.3.2.2 Material designations and parameters 62 
3.3.2.3 Subsoil model and characteristic subsoil parameters 62 
3.3.2.4 Limit states for verifications 62 
3.3.2.5 Required verifications 62 
3.3.2.5.1 Verification of the stability of the seabed 62 
3.3.2.5.2 Verifications for foundation elements 63 
3.3.2.5.3 Verifications pertaining to the ability of the foundation elements to 
interact with the support structure 64 
3.3.2.5.4 Geotechnical component tests 64 
3.3.2.5.5 Additional geotechnical information and verifications 65 
3.3.3 Geotechnical documents to be submitted 65 
3.3.3.1 Geotechnical design report 65 
3.3.3.2 Geotechnical as-built documentation (geotechnical installation report) 66 
3.3.3.3 Supplementary reports to the geotechnical design report 66 
3.3.3.4 Documents to be submitted for the 2 nd release 66 
3.3.3.5 Documents to be submitted for the 3 rd release 67 
3.4 Implementation phase 67 
3.4.1 Preliminary remarks 67 
3.4.2 Technical codes of practice 67 
3.4.3 Requirements and required verifications 67