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Sec.1: Topside stru [Table of Contents] B: Assumptions and Applications

DNV-OS-C102 Structural Design of Offshore Ships

[-] Sec.1: Topside stru
[-] A: General

Sec.1
A. General

Sec.1
A 100   General

Sec.1 A
101   This standard comprises sections with provisions applicable to all types of offshore floating ship shaped units, and sections with provisions for specific types of units such as well intervention/drilling units and FPSOs.

Sec.1 A
102   This standard is based on the principles of the Working Stress Design (WSD). In WSD the target component level is achieved by keeping the calculated stress for different load combinations equal to or lower than the maximum stress. The maximum permissible stress is defined by multiplication of the capacity, of the structural member with permissible usage factors.

Sec.1
A 200   Objectives

Sec.1 A
201   The objectives of this standard are to:
—provide an internationally acceptable standard for design of offshore ship-shaped units
—serve as a technical reference document in contractual matters between purchaser and manufacturer
—serve as a guideline for designers, purchaser, contractors and regulators
—specify procedures and requirements for units subject to DNV classification services
—base the design of the hull and topside on the same principles and methodology for all transit and operational scenarios
—provide, as far as possible, consistent loads for both topside and hull design.

Sec.1
A 300   Classification

Sec.1 A
301   Classification principles, procedures and applicable class notations related to classification services of offshore units are specified in the DNV Offshore Service Specifications given in Table A1.

Sec.1 A
Table A1 DNV Offshore Service Specifications  
Reference Title 
DNV-OSS-101  Rules for Classification of Offshore Drilling and Support Units  
DNV-OSS-102 Rules for Classification of Floating Production, Storage and Loading Units 



Sec.1 A
302   Documentation for classification shall be in accordance with the NPS DocReq (DNV Nauticus Production System for documentation requirements) and DNV-RP-A201.

Sec.1: Topside stru [Table of Contents] B: Assumptions and Applications