Annex 8B – Recommended Procedures for Thickness Measurements of Single-Side Skin Bulk Carriers Built Under the IACS Common Structural Rules^footnote

1 These procedures should be used for recording thickness measurements of ships built under the IACS Common Structural Rules.

2 Reporting forms TM1-DSBC(CSR), TM2-DSBC(CSR)(i), TM2-DSBC(CSR)(ii), TM3-DSBC(CSR), TM4-DSBC(CSR), TM5-DSBC(CSR) and TM6-DSBC(CSR) (see appendix 2) should be used for recording thickness measurements. The as-built thickness and the voluntary thickness addition and renewal thickness (minimum allowable thickness) should be stated in the aforementioned forms.

3 Appendix 3 contains guidance diagrams and notes clarifying the areas for thickness measurement and the respective reporting forms.

4 The reporting forms should, where appropriate, be supplemented by data presented on structural sketches.aga

Appendix 1 – General Particulars

Ship's name: ..............................................................................................................................
IMO number: .............................................................................................................................
Class/Administration identity number: .......................................................................................
Port of registry: ..........................................................................................................................
Gross tonnage: ..........................................................................................................................
Deadweight: ..............................................................................................................................
Date of build: .............................................................................................................................
Classification society: ................................................................................................................


Name of the Firm performing thickness measurement: ........................................................... ..................................................................................................................................................
Thickness measurement firm certified by: ........................................................................
Certificate number: ....................................................................................................................
Certificate valid from: ........................................... to ............................................................
Place of measurement: .............................................................................................................
First date of measurement: .......................................................................................................
Last date of measurement: ........................................................................................................
Renewal survey/intermediate^footnote survey due: ...............................................................................
Details of measurement equipment: ..........................................................................................
Qualification of operator: ...........................................................................................................


Report number: ...................................................	consisting of ................................ pages
Name of operator: ...............................................	Name of surveyor: ..................................
Signature of operator: ..........................................	Signature of surveyor: ............................
Company official stamp: ......................................	Administration: .......................................

Official stamp

Appendix 2 – Reports on Thickness Measurement

TM1-DSBC(CSR)

Report on thickness measurement of all deck plating, all bottom plating or side shell plating^footnote

Ship's name....................

IMO number..........................

Class Identity No……………….

Report No………………

STRAKE POSITION

PLATE POSITION

No. or
letter

As-built thk. mm

Voluntary thickness addition mm

Renewal thickness mm (a)

Forward reading

Aft reading

Mean remaining corr. addition, mm

[(c1)+(c2)]/2

Gauged thk. mm

(b1)

Remaining corr. addition, mm

(c1)=(b1)-(a)

Gauged thk. mm

(b2)

Remaining corr. addition, mm

(c1)=(b1)-(a)

12th forward

11th

10th

9th

8th

7th

6th

5th

4th

3rd

2nd

1st

Amidships

1st aft

2nd

3rd

4th

5th

6th

7th

8th

9th

10th

11th

12th

Operator's signature………………………….........

Notes – see following page

Notes to report TM1-DSBC(CSR)

1 This report should be used for recording the thickness measurement of:

.1 all strength deck plating within cargo length area;
.2 all keel, bottom shell plating and bilge plating within the cargo length area;
.3 side shell plating including selected wind and water strakes outside cargo length area; and
.4 all wind and water strakes within cargo length area.

2 The strake position should be cleared as follows:

.1 for strength deck indicate the number of the strake of plating inboard from the stringer plate;
.2 for bottom plating indicate the number of the strake of plating outboard from the keel plate; and
.3 for side shell plating give number of the strake of plating below sheerstrake and letter as shown on shell expansion.

3 Only the deck plating strakes outside line of openings should be recorded.

4 Measurements should be taken at the forward and aft areas of all plates and the single measurements recorded should represent the average of multiple measurements.

5 The remaining corrosion addition should be recorded with the result of the gauged thickness minus the renewal thickness. If the result is negative, the structure in way should be renewed, and the mark "R" should be indicated in the right-hand column. If the result is between 0 and 0.5 mm (0 included), the structure in way should be additionally gauged, and the mark "S" should be indicated in the right-hand column.

TM2-DSBC(CSR)(i)

Report on thickness measurement of shell and deck plating (one, two or three transverse sections)

Ship's name....................

IMO number..........................

Class Identity No……………….

Report No………………

STRENGTH DECK AND SHEERSTRAKE PLATING

FIRST TRANSVERSE SECTION AT FRAME NUMBER

SECOND TRANSVERSE SECTION AT FRAME NUMBER

THIRD TRANSVERSE SECTION AT FRAME NUMBER

STRAKE POSITION

No. or
letter

As-built thk. mm

Vol. thk. add.mm

Ren.thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

No. or letter

As-built thk. mm

Vol. thk. add. mm

Ren. thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

No. or
letter

As-built thk. mm

Vol. thk. add. mm

Ren.thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

Stringer plate

1st strake inboard

2nd

3rd

4th

5th

6th

7th

8th

9th

10th

11th

12th

13th

14th

centre strake

sheer strake

TOPSIDE TOTAL

Operator's signature………………………….........

Notes – see following page

Notes to report TM2-DSBC(CSR)(i)

1 This report should be used for recording the thickness measurement of strength deck plating and sheer strake plating transverse sections (one, two or three sections within the cargo length area, comprising of the structural items (1), (2) and (3) as shown on the diagram of typical transverse sections (appendix 3)).

2 Only the deck plating strakes outside the line of openings should be recorded.

3 The top side area comprises deck plating, stringer plate and sheerstrake (including rounded gunwales).

4 The exact frame station of measurement should be stated.

5 The single measurements recorded should represent the average of multiple measurements.

6 The remaining corrosion addition should be recorded with the result of the gauged thickness minus the renewal thickness. If the result is negative, the structure in way should be renewed, and the mark "R" should be indicated in the right-hand column. If the result is between 0 and 0.5 mm (0 included), the structure in way should be additionally gauged, and the mark "S" should be indicated in the right-hand column.

TM2-DSBC(CSR)(ii)

Report on thickness measurement of shell plating (one, two or three transverse sections)

Ship's name....................

IMO number..........................

Class Identity No……………….

Report No………………

SHELL PLATING

FIRST TRANSVERSE SECTION AT FRAME NUMBER

SECOND TRANSVERSE SECTION AT FRAME NUMBER

THIRD TRANSVERSE SECTION AT FRAME NUMBER

STRAKE POSITION

No. or
letter

As-built thk. mm

Vol. thk. add.mm

Ren.thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

No. or letter

As-built thk. mm

Vol. thk. add. mm

Ren. thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

No. or
letter

As-built thk. mm

Vol. thk. add. mm

Ren.thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

1^st below sheer strake

2^nd

3^rd

4^th

5^th

6^th

7^th

8^th

9^th

10th

11^th

12^th

13^th

14^th

15^th

16^th

17^th

18^th

19^th

20^th

Keel strake

BOTTOM TOTAL

Operator's signature………………………….........

Notes – see following page

Notes to report TM2-DSBC(CSR)(ii)

1 This report should be used for recording the thickness measurement of shell plating at transverse sections (one, two or three sections within the cargo length area, comprising of the structural items (4), (5), (6) and (7) as shown on the diagram of typical transverse sections (appendix 3)).

2 The bottom area comprises keel, bottom and bilge plating.

3 The exact frame station of measurement should be stated.

4 The single measurements recorded should represent the average of multiple measurements.

TM3-DSBC(CSR)

Report on thickness measurement of longitudinal members (one, two or three transverse sections)

Ship's name....................

IMO number..........................

Class Identity No……………….

Report No………………

STRENGTH DECK AND SHEERSTRAKE PLATING

FIRST TRANSVERSE SECTION AT FRAME NUMBER

SECOND TRANSVERSE SECTION AT FRAME NUMBER

THIRD TRANSVERSE SECTION AT FRAME NUMBER

STRUCTURAL MEMBER

Item No.

As-built thk. mm

Vol. thk. add.mm

Ren.thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

Item No.

As-built thk. mm

Vol. thk. add. mm

Ren. thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

Item No.

As-built thk. mm

Vol. thk. add. mm

Ren.thk. mm (a)

Gauged thk. mm (b)

Remaining corr. addition, mm

(b)-(a)

Operator's signature………………………….........

Notes – see following page

Notes to report TM3-DSBC(CSR)

1 This report should be used for recording the thickness measurement of longitudinal members at transverse sections (one, two or three sections within the cargo length area, comprising of the appropriate structural items (8) to (20) and (31) as shown on diagram of typical transverse sections (appendix 3)).

2 The exact frame station of measurement should be stated.

3 The single measurements recorded should represent the average of multiple measurements.

4 The remaining corrosion addition should be recorded with the result of the gauged thickness minus the renewal thickness. If the result is negative, the structure in way should be renewed, and the mark "R" should be indicated in the right-hand column. If the result is between 0 and 0.5 mm (0 included), the structure in way should be additionally gauged, and the mark "S" should be indicated in the right-hand column.

TM4-DSBC(CSR)

Report on thickness measurement of transverse structural members in the double bottom, hopper side and topside water ballast tanks

Ship's name.....................

IMO number..........................

Class Identity No……………….

Report No………………

TANK DESCRIPTION:

LOCATION OF STRUCTURE:

STRUCTURAL MEMBER

ITEM

As-built thickness mm

Voluntary thickness addition mm

Renewal thickness mm (a)

Gauged thickness mm

(b)

Remaining corr. addition mm

(b)-(a)

Operator's signature………………………….........

Notes – see following page

Notes to report TM4-DSBC(CSR)

1 This report should be used for recording the thickness measurement of transverse structural members, comprising of the appropriate structural items (23) to (25) and (34) as shown on diagram of typical transverse section (appendix 3).

2 Guidance for areas of measurements is indicated in appendix 3.

3 The single measurements recorded should represent the average of multiple measurements.

TM5-DSBC(CSR)

Report on thickness of cargo hold transverse bulkheads

Ship's name.....................

IMO number..........................

Class Identity No……………….

Report No………………

HOLD DESCRIPTION:

LOCATION OF STRUCTURE:

FRAME NO.:

STRUCTURAL COMPONENT

(PLATING/STIFFENER)

As-built thickness mm

Voluntary thickness addition mm

Renewal thickness mm (a)

Gauged thickness mm

(b)

Remaining corr. addition mm

(b)-(a)

Operator's signature………………………….........

Notes – see following page

Notes to report TM5-DSBC(CSR)

1 This report form should be used for recording the thickness measurement of watertight transverse bulkheads in cargo holds.

2 Guidance for areas of measurements is indicated in appendix 3.

3 The single measurements recorded should represent the average of multiple measurements.

TM6-DSBC(CSR)

Report on thickness measurement of miscellaneous structural members

Ship's name.....................		IMO number..........................				Class Identity No……………….			Report No………………
STRUCTURAL MEMBER:									SKETCH
LOCATION OF STRUCTURE:
Description	As-built thk. mm	Voluntary thickness addition mm	Renewal thickness mm (a)	Gauged thickness mm (b)		Remaining corr. addition mm (b)-(a)
Description	As-built thk. mm	Voluntary thickness addition mm	Renewal thickness mm (a)	P	S	P	S





















Operator's signature………………………….........								Notes – see following page

Notes to report TM6-DSBC(CSR)

1 This report should be used for recording the thickness measurement of miscellaneous structural members including the structural items (28), (29) and (30) as shown on diagram of typical transverse section (appendix 3).

2 Guidance for areas of measurements is indicated in appendix 3.

3 The single measurements recorded should represent the average of multiple measurements.

Appendix 3 - GUIDANCE ON THICKNESS MEASUREMENT – DOUBLE-SIDE SKIN BULK CARRIERS BUILT UNDER THE IACS COMMON STRUCTURAL RULES

Typical transverse section of a double-side skin bulk carrier with indication of longitudinal and transverse members

Transverse section outline

The diagram may be used for those ships where the typical transverse sections are not suitable.

Close-up survey and thickness measurement areas

Areas subject to close-up survey and thickness measurement areas (A) to (E) as defined in annex 1. The thickness measurements should be reported in forms TM3-DSBC(CSR), TM4-DSBC(CSR), TM5-DSBC(CSR) and TM6-DSBC(CSR), as appropriate.

Annex 8B – Recommended Procedures for Thickness Measurements of Single-Side Skin Bulk Carriers Built Under the IACS Common Structural Rulesfootnote

Appendix 1 – General Particulars

Appendix 2 – Reports on Thickness Measurement

Appendix 3 - GUIDANCE ON THICKNESS MEASUREMENT – DOUBLE-SIDE SKIN BULK CARRIERS BUILT UNDER THE IACS COMMON STRUCTURAL RULES

Typical transverse section of a double-side skin bulk carrier with indication of longitudinal and transverse members

Transverse section outline

Close-up survey and thickness measurement areas

Annex 8B – Recommended Procedures for Thickness Measurements of Single-Side Skin Bulk Carriers Built Under the IACS Common Structural Rules^footnote