ASTM F2935-23

Standard Specification for Chocks, Panama, Mooring Cast Steel

ABSTRACT
This specification covers the principal dimensions and materials of chocks installed in ships to comply with the regulations of the Panama Canal. It indicates the workmanship, finish, and appearance of deck mounted chocks, along with the configuration of bulwark mounted chocks. The dimension requirements and classification of chocks are included as well.
SCOPE
1.1 This specification covers the principal dimensions and materials of chocks installed in ships to comply with the regulations of the Panama Canal.  
1.2 Chocks can be used with either wire rope or fiber and synthetic ropes.  
1.3 Chocks are for mounting directly on a deck, seat (foundation) or for mounting in a bulwark.  
1.4 To meet Panama Canal Company regulations the radius of contact surfaces of lines must be 180 mm.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Apr-2023
• ICS: 47.020.50 - Deck equipment and installations
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.01 - Structures

Relations

• Refers: ASTM A27/A27M-20 - Standard Specification for Steel Castings, Carbon, for General Application
• Effective Date: 01-May-2020

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2935 − 23 An American National Standard
Standard Specification for
1
Chocks, Panama, Mooring Cast Steel
This standard is issued under the fixed designation F2935; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 closed chock—a metal flared ring-like fitting mounted
on a ship through which mooring lines pass to tow or moor a
1.1 This specification covers the principal dimensions and
ship.
materials of chocks installed in ships to comply with the
3.1.3 mooring ring or pipe—a chock mounted in the bul-
regulations of the Panama Canal.
wark and conforming to Type II or IV.
1.2 Chocks can be used with either wire rope or fiber and
3.1.4 rope contact area—that part of the fitting in contact
synthetic ropes.
with the mooring line in normal mooring operations.
1.3 Chocks are for mounting directly on a deck, seat
(foundation) or for mounting in a bulwark.
4. Classification
1.4 To meet Panama Canal Company regulations the radius
4.1 The size of the chock shall be identified by the nominal
of contact surfaces of lines must be 180 mm.
size “L” and “H” of the opening as shown in Table 1 and Fig.
1, and Table 2 and Fig. 2. Sizes larger than 360 mm by 260 mm
1.5 The values stated in SI units are to be regarded as
may be considered as double chocks.
standard. No other units of measurement are included in this
standard.
4.2 Chocks are furnished in types as follows:
4.2.1 Type I—Deck mounted, as shown in Fig. 1, and
1.6 This international standard was developed in accor-
conforms to all dimensions in Table 1.
dance with internationally recognized principles on standard-
4.2.2 Type II—Bulwark mounted, as shown in Fig. 2, and
ization established in the Decision on Principles for the
conforms to all dimensions in Table 2.
Development of International Standards, Guides and Recom-
4.2.3 Type III—Deck mounted conforming only to dimen-
mendations issued by the World Trade Organization Technical
sions “L”, “H”, and 180 mm radius at entrance, as shown in
Barriers to Trade (TBT) Committee.
Fig. 1 and Table 1.
2. Referenced Documents
4.2.4 Type IV—Bulwark mounted conforming only to di-
2
mensions “L”, “H”, and 180 mm radius at entrance, as shown
2.1 ASTM Standards:
in Fig. 2 and Table 2.
A27/A27M Specification for Steel Castings, Carbon, for
General Application
4.3 Chocks shall be furnished in either of the following
3
2.2 ANSI Standards:
grades:
B 46.1 Surface Texture (Roughness, Waviness, Lay)
4.3.1 Grade 1—Surface finish shall be in the as cast
condition.
3. Terminology
4.3.2 Grade 2—Surface finish in way of rope contact shall
3.1 Definitions of Terms Specific to This Standard: be in accordance with 7.2.
3.1.1 bulwark—a structural enclosure along the edge of the
5. Ordering Information
ship to serve as a rail.
5.1 Orders for chocks under this specification shall include
this standard date, and the following:
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships
5.1.1 Quantity (number) of chocks required,
and Marine Technology and is the direct responsibility of Subcommittee F25.01 on
Structures. 5.1.2 Size (opening, L × H),
Current edition approved May 1, 2023. Published May 2023. Originally
5.1.3 Type and grade,
ε1
approved in 2012. Last previous edition approved in 2018 as F2935 – 12 (2018) .
5.1.4 Primer and coating, if any (see 7.3), and
DOI:10.1520/F2935-23.
2 5.1.5 Marking.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on 6. Materials and Manufacture
the ASTM website.
3
6.1 Material shall be cast steel in accordance with Specifi-
Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. cation A27/A27M, Grade 60–30.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F2935 − 23
TABLE 1 Dimension Requirements (see Fig. 1)
(Unit: mm)
Nominal size L l l l l H H H R R R
1 2 3 4 1 2 1 2
310 310 708 688 105 310 260 639 543 130 329 233
360 360 760 740 130 360 260 640 545 130 330 235
Welding leg length SWL
Nominal size R R R T D Calculated weight (kg)
3 4 5
z kN tonnes
1
310 142 140 195 32 38 8 471 48 257
360 140 138 192 34 40 8.5 687 70 286
NOTE 1—All fillet radii to be eq
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: F2935 − 12 (Reapproved 2018) F2935 − 23 An American National Standard
Standard Specification for
1
Chocks, Panama, Mooring Cast Steel
This standard is issued under the fixed designation F2935; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1
ε NOTE—Keywords section was editorially added in March 2018.
1. Scope
1.1 This specification covers the principal dimensions and materials of chocks installed in ships to comply with the regulations
of the Panama Canal.
1.2 Chocks can be used with either wire rope or fiber and synthetic ropes.
1.3 Chocks are for mounting directly on a deck, seat (foundation) or for mounting in a bulwark.
1.4 To meet Panama Canal Company regulations the radius of contact surfaces of lines must be 180 mm.
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
A27/A27M Specification for Steel Castings, Carbon, for General Application
3
2.2 ANSI Standards:
B 46.1 Surface Texture (Roughness, Waviness, Lay)
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 bulwark—a structural enclosure along the edge of the ship to serve as a rail.
3.1.2 closed chock—a metal flared ring-like fitting mounted on a ship through which mooring lines pass to tow or moor a ship.
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships and Marine Technology and is the direct responsibility of Subcommittee F25.01 on
Structures.
Current edition approved March 1, 2018May 1, 2023. Published April 2018May 2023. Originally approved in 2012. Last previous edition approved in 20122018 as F2935
ε1
– 12. DOI:10.1520/F2935-12R18E01.12 (2018) . DOI:10.1520/F2935-23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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F2935 − 23
3.1.3 mooring ring or pipe—a chock mounted in the bulwark and conforming to Type II or IV.
3.1.4 rope contact area—that part of the fitting in contact with the mooring line in normal mooring operations.
4. Classification
4.1 The size of the chock shall be identified by the nominal size “L” and “H” of the opening as shown in Table 1 and Fig. 1, and
Table 2 and Fig. 2. Sizes larger than 360 mm by 260 mm may be considered as double chocks.
4.2 Chocks are furnished in types as follows:
4.2.1 Type I—Deck mounted, as shown in Fig. 1, and conforms to all dimensions in Table 1.
4.2.2 Type II—Bulwark mounted, as shown in Fig. 2, and conforms to all dimensions in Table 2.
4.2.3 Type III—Deck mounted conforming only to dimensions “L”, “H”, and 180 mm radius at entrance, as shown in Fig. 1 and
Table 1 and the requirements of Sections 6 – 10.
4.2.4 Type IV—Bulwark mounted conforming only to dimensions “L”, “H”, and 180 mm radius at entrance, as shown in Fig. 2
and Table 2 and the requirements of Sections 6 to 10.
4.3 Chocks shall be furnished in either of the following grades:
4.3.1 Grade 1—Surface finish shall be in the as cast condition.
4.3.2 Grade 2—Surface finish in way of rope contact shall be in accordance with 7.2.
5. Ordering Information
5.1 Orders for chocks under this specification shall include this standard date, and the following:
5.1.1 Quantity (number) of chocks required,
5.1.2 Size (opening, L × H),
5.1.3 Type and grade,
5.1.4 Primer and coating, if any (see 7.3), and
5.1.5 Marking.
6. Materials and Manufacture
6.1 Material shall be cast steel in accordance with Specification A27/A27M, Grade 60–30.
6.2 For Types III and IV the manufacturer shall cert
...