DNV DNV-OS-C104 PDF

The scope of this standard is to provide principles, technical requirements and guidance for structural design of self-elevating units made of steel.

Load and resistence factor design (LRFD) and the working stress design (WSD) are covered as applicable design methods. The following topics are covered:

— design principles

— design loads and load effects

— material selection and inspection principles

— strength assessment

— weld and bolt connections

— hull equipment and supporting structure

— opening and closing appliances.

This standard has structural requirements for the following:

— scantling control of plates, stiffeners and girders

— yield

— buckling

— fatigue.

The requirements cover the following basic design conditions:

— transit condition

— elevated operating condition

— elevated survival condition

— preload condition

— installation condition

— accidental condition.

The acceptance criteria in this standard are based on a linear elastic strength approach, i.e. material yield stress limit. However, for special structural items it may be acceptable to use the plastic material capacity, i.e. ultimate material limit.

Serviceability requirements related to normal use or durability, e.g. deflections, vibration and functional motions related to operation are not covered in this standard.

Flag state and shelf state requirements are not covered by this standard.

Guidance note:

Flag state and shelf state regulations may include requirements in excess of the provisions of this standard.

In case of conflict between requirements given in this standard and other DNV documents, the requirements given in this standard prevail.