scope:

The buckling checks shall be performed according to:

- Sec.2 for the slenderness requirements of plates, longitudinal and transverse stiffeners, primary supporting members and brackets.

- Sec.3 for the hull girder buckling requirements of plates, longitudinal and transverse stiffeners, supporting members and other structures.

- Sec.4 for the buckling requirements of the direct analysis for the plates, stiffened panels and other structures. Buckling analysis according to Sec.4 is also applicable for beam analysis of structure elements subject to compressive and shear stresses.

- the Society's document DNVGL CG 0128, Buckling, for the buckling capacity.

Stiffener The buckling check of the stiffeners referred to in this chapter is applicable to the stiffener fitted parallel to the long edge of the plate panel.

Platforms for permanent means of access (PMA) Platforms for permanent means of access (PMA) without web stiffening shall be consider as enlarged stiffeners and shall comply with the following requirements:

- slenderness requirement for stiffeners as given in Sec.2 [3]

- buckling strength for stiffeners as given in Sec.3 [3] and Sec.4 [2].

Platforms for permanent means of access (PMA) with web stiffening shall be considered as primary support members (PSM) and shall comply with the following requirements:

- slenderness requirement for PMA as given in Sec.2 [4]

- buckling strength of web plate as given in Sec.3 [3] and Sec.4 [2]

- buckling strength of web stiffener as given in Sec.3 [3] and Sec.4 [2].