Annex 10 – Requirements for Extent of Thickness Measurement at Areas of Substantial Corrosion of Single-Side Skin Bulk Carriers
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - International Codes - 2011 ESP Code – International Code on the Enhanced Programme of Inspections During Surveys of Bulk Carriers and Oil Tankers, 2011 – Resolution A.1049(27) - Annex A – Code on the Enhanced Programme of Inspections During the Surveys of Bulk Carriers - Part A – Code on the Enhanced Programme of Inspections During Surveys of Bulk Carriers having Single-Side Skin Construction - Annex 10 – Requirements for Extent of Thickness Measurement at Areas of Substantial Corrosion of Single-Side Skin Bulk Carriers

Annex 10 – Requirements for Extent of Thickness Measurement at Areas of Substantial Corrosion of Single-Side Skin Bulk Carriers

 Renewal survey of bulk carriers within the cargo area

Shell structures

Structural member Extent of measurement Pattern of measurement
Bottom and side shell plating Suspect plate, plus four adjacent plates Five-point pattern for each panel between longitudinals
See other tables for particulars on gauging in way of tanks and cargo holds  
Bottom/side shell longitudinals Minimum of three longitudinals in way of suspect areas Three measurements in line across web


Three measurements on flange

 Transverse bulkheads in cargo holds

Structural member Extent of measurement Pattern of measurement
Lower stool Transverse band within 25 mm of welded connection to inner bottom Five-point pattern between stiffeners over 1 m length
Transverse band within 25 mm of welded connection to shelf plate  
Transverse bulkhead Transverse band at approximately mid-height Five-point pattern between stiffeners over 1 m2 length
Transverse band at part of bulkhead adjacent to upper deck or below upper stool shelf plate (for those ships fitted with upper stools)  

 Deck structure including cross strips, main cargo hatchways, hatch covers, coamings and topside tanks

Structural member Extent of measurement Pattern of measurement
Cross-deck strip plating Suspect cross-deck strip plating Five-point pattern between under deck stiffeners over 1 m length
Under-deck stiffeners Transverse members Five-point pattern at each end and mid-span
  Longitudinal member Five-point pattern on both web and flange
Hatch covers Side and end skirts, each three locations Five-point pattern at each location
  Three longitudinal bands, outboard strakes (2) and centreline strake (1) Five-point measurement each band
Hatch coamings Each side and end of coaming, one band lower third, one band upper two-thirds of coaming Five-point measurement each band, i.e. end or side coaming
Topside water ballast tanks Watertight transverse bulkheads  
 
  • i lower third of bulkhead
  • i five-point pattern over 1 m 2 of plating
 
  • ii upper two-thirds of bulkhead
  • ii five-point pattern over 1 m2 of plating
 
  • iii stiffeners
  • iii five-point pattern over 1 m length
  Two representative swash transverse bulkheads  
 
  • i lower third of bulkhead
  • i five-point pattern over 1 m2 of plating
 
  • ii upper two-thirds of bulkhead
  • ii five-point pattern over 1 m2 of plating
 
  • iii stiffeners
  • iii five-point pattern over 1 m length
  Three representative bays of slope plating  
 
  • i lower third of tank
  • i five-point pattern over 1 m2 of plating
 
  • ii upper two-thirds of tank
  • ii five-point pattern over 1 m2 of plating
  Longitudinals, suspect and adjacent Five-point pattern both web and flange over 1 m length
Main deck plating Suspect plates and adjacent (4) Five-point pattern over 1 m2 of plating
Main deck longitudinals Minimum of three longitudinals where plating measured Five-point pattern on both web and flange over 1 m length
Web frames/ transverses Suspect plates Five-point pattern over 1 m2

 Double-bottom and hopper structure

Structural member Extent of measurement Pattern of measurement
Inner/double-bottom plating Suspect plate plus all adjacent plates Five-point pattern for each panel between longitudinals over 1 m length
Inner/double-bottom longitudinals Three longitudinals where plates measured Thcree measurements in line across web, and three measurements on flange
Longitudinal girders or transverse floors Suspect plates Five-point pattern over about 1 m2
Watertight bulkheads
(WT floors) 		Lower third of tank Five-point pattern over 1 m2 of plating
  Upper two thirds of tank Five-point pattern alternate plates over 1 m2 of plating
Web frames Suspect plate Five-point pattern over 1 m2 of plating
Bottom/side shell longitudinals Minimum of three longitudinals in way of suspect areas Three measurements in line across web, and three measurements on flange

 Cargo holds

Structural member Extent of measurement Pattern of measurement
Side shell frames Suspect frame and each adjacent a At each end and mid span: five-point pattern of both web and flange
    b Five-point pattern within 25 mm of welded attachment to both shell and lower slope plate
Parent topic: Part A – Code on the Enhanced Programme of Inspections During Surveys of Bulk Carriers having Single-Side Skin Construction
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