Clasification Society Rulefinder 2020 - Version 9.33 - Fix
Common Structural Rules - Common Structural Rules for Bulk Carriers and Oil Tankers, January 2019 - Part 1 General Hull Requirements - Chapter 4 Loads - Section 7 Design Load Scenarios - 2 Design Load Scenarios for Strength Assessment

2 Design Load Scenarios for Strength Assessment

2.1 Principal design load scenarios

2.1.1 The principal design load scenarios are given in Table 1.

Table 1 : Principal design load scenarios

Design load scenario Harbour and sheltered water and testing Seagoing conditions with extreme sea loads Ballast water exchange (4) Accidental flooded conditions (4)
Load components Static
(S) 		Static + Dynamic
(S+D) 		Static + dynamic
(S+D) 		Static
(A:S) 		Static + dynamic
(A:S+D)
Hull Girder VBM Msw-p Msw + Mwv-LC Msw + Mwv-LC Msw-f (2) Msw-f + Mwv-LC (3)
HBM - Mwh-LC Mwh-LC - Mwh-LC (3)
VSF Qsw-p Qsw + Qwv-LC Qsw + Qwv-LC - Qsw-f + Qwv-LC (3)
TM - Mwt-LC Mwt-LC - -
Local Loads Pex External deck for green sea - PD - - -
Hull envelope PS PS + PW PS + PW - -
Pin Ballast tanks (1) Max (Pls, PST) Pls + Pld Pls + Pld -

-
Liquid cargo tanks - -
Other tanks - -
Water tight boundaries - - - Pfs Pfs + Pfd
Cargo holds Pbs Pbs + Pbd -
Pdk Internal decks for dry spaces Pdl-s Pdl-s + Pdl-d - - -
External deck for distributed loads Pdl-s Pdl-s + Pdl-d -

-

 -
External deck for heavy units FU-s FU-s + FU-d - - -
(1) WB cargo hold is considered as ballast tank except for design load scenario ‘ballast water exchange’.
(2) Mswf used for hull local scantling of watertight bulkhead
(3) Hull girder strength check is performed according to Ch 5, Sec 1 for bulk carriers having a length Lof 150 m or above
(4) Applicable to prescriptive assessment only

2.2 Additional design load scenarios

2.2.1 The design load scenarios to be considered for sloshing, bottom slamming and bow impact are given in Table 2.

Table 2 : Design load scenarios for impact and sloshing conditions

Design load scenario Bow impact
Impact(I) 		Bottom slamming Impact (I) Sloshing
Sloshing (SL)
Load components
Hull Girder VBM - - Msw
HBM - - -
VSF - - -
TM - - -
Local Loads Pex External deck for green sea - - -
Hull envelope PFB PSL -
Pin Ballast tanks

-

-

 Pslh
Liquid cargo tanks
Other tanks
Watertight boundaries - -
Cargoholds (1) - - -
Pdk Internal decks for dry spaces - - -
External deck for distributed loads - - -
External deck for heavy units - - -
(1) Sloshing assessment is not to be considered for water ballast cargo holds of bulk carriers.
Parent topic: Section 7 Design Load Scenarios
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