Critical area in cargo hold, ballast tanks and general

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  • 1. LIST OF CRITICAL AREAS: CARGO HOLD Upper Deck (incl. hatch coamings) - Hatch corners and hatch end beam connection to topside tank transverse ring web - Hatch coaming longitudinal end brackets - Hatch coaming brackets Cargo Hold (incl. underdeck, bulkheads & stools) (see Figs 1a to 1e) - Connections in way of upper boundaries of corrugated bulkheads - Connection of side shell frames to hopper and topside tank plating - Connections in way of lower stool shelf plate - Welded knuckle connection of hopper tank sloping plating to inner bottom plating - Radiused knuckle connection of hopper tank sloping plating to inner bottom plating - Connections of lower stool to inner bottom plate - Connections of lower stool to inner bottom in way of double bottom girders TANKS Double Bottom Tank (incl. hopper) (see fig 2a & 2b) - Floor vertical flat bar stiffener connection to bottom and inner bottom longitudinals - Welded knuckle connection of hopper tank sloping plating to inner bottom plating - Radiused knuckle connection of hopper tank sloping plating to inner bottom plating - Transverse ring web, flat bar stiffener and tripping bracket connection to longitudinal on hopper sloping plate, bottom shell and side shell and side shell plating - Upper intermediate brackets below hold side shell frame lower brackets connections of bottom and inner bottom longitudinals below lower stool Topside Tank (see fig 3) - Deck transverses, stiffener connection and tripping bracket connection to longitudinals on upper deck - Transverse ring web, stiffener connection and tripping bracket connection to longitudinals on topside tank sloping plate - Lower intermediate brackets above hold side shell frame upper bracket - Hatch corners and hatch end beam connection to topside tank transverse ring web - Connections in way of upper boundaries of corrugated bulkheads - Side Tank Structure (Double Skin Bulk Carriers only) (see fig 4) - Connections of side shell longitudinals to horizontal stiffeners and horizontal tripping brackets on transverse webs - GENERAL Structures adjacent to areas previously part renewed should be specially considered with respect to reduced scantlings; typically i.w.o. part renewed main frames. Note: consequences of reduced scantlings due to corrosion: - Buckling of deck - Buckling of watertight bulkheads - Buckling of stringers, frames and girders - Cracking Special attention to be paid to possible corrosion and mechanical damages of top wing tank drop lines in holds.
  • 2. CARGO HOLD REGION Fig 1a Cargo Hold (incl. underdeck, bulkheads & stools) Critical areas in cargo hold CRITICAL AREAS Fig 1b Cargo Hold (incl. underdeck, bulkheads & stools) Critical areas in cargo hold CRITICAL AREAS
  • 3. Fig 1c Cargo Hold (incl. underdeck, bulkheads & stools) Critical areas in cargo hold CRITICAL AREAS Fig 1d Cargo Hold (incl. underdeck, bulkheads & stools)Critical areas in cargo hold CRITICAL AREAS
  • 4. Fig 1e Cargo Hold (incl. underdeck, bulkheads & stools) Critical areas in cargo hold CRITICAL AREAS Fig 2a Double Bottom Tank (incl. hopper) Critical areas in hopper CRITICAL AREAS
  • 5. Fig 2b Double Bottom Tank (incl. hopper) Critical areas in double bottom CRITICAL AREAS Fig 3 CARGO HOLD REGION Topside Tank Critical areas in Topside Tanks CRITICAL AREAS
  • 6. Fig 4 Side Tank Structure (Double Skin Bulk Carriers only) Critical areas in way of side tanks (Only applicable to Double Skin Bulk Carriers) Watertight side web in Transverse side line with web watertight bulkhead CRITICAL AREAS