ASTM F2935-12

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 the standard.

General Information

• Status: Historical
• Publication Date: 31-Dec-2011
• ICS: 47.020.50 - Deck equipment and installations
• Technical Committee: F25 - Ships and Marine Technology
• Drafting Committee: F25.01 - Structures

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:F2935 −12 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 4. Classification
1.1 This specification covers the principal dimensions and 4.1 The size of the chock shall be identified by the nominal
materials of chocks installed in ships to comply with the size “L” and “H” of the opening as shown in Table 1 and Fig.
regulations of the Panama Canal. 1,andTable2andFig.2.Sizeslargerthan360mmby260mm
may be considered as double chocks.
1.2 Chocks can be used with either wire rope or fiber and
synthetic ropes. 4.2 Chocks are furnished in types as follows:
4.2.1 Type I—Deck mounted, as shown in Fig. 1, and
1.3 Chocks are for mounting directly on a deck, seat
conforms to all dimensions in Table 1.
(foundation) or for mounting in a bulwark.
4.2.2 Type II—Bulwark mounted, as shown in Fig. 2, and
1.4 To meet Panama Canal Company regulations the radius
conforms to all dimensions in Table 2.
of contact surfaces of lines must be 180 mm.
4.2.3 Type III—Deck mounted conforming only to dimen-
sions “L”, “H”, and 180 mm radius at entrance, as shown in
1.5 The values stated in SI units are to be regarded as the
standard. Fig. 1 and Table 1 and the requirements of Sections6–10.
4.2.4 Type IV—Bulwark mounted conforming only to di-
2. Referenced Documents
mensions “L”, “H”, and 180 mm radius at entrance, as shown
2
in Fig. 2 and Table 2 and the requirements of Sections 6 to 10.
2.1 ASTM Standards:
A27/A27M Specification for Steel Castings, Carbon, for
4.3 Chocks shall be furnished in either of the following
General Application grades:
3
4.3.1 Grade 1—Surface finish shall be in the as cast
2.2 ANSI Standard:
condition.
B 46.1 Surface Texture
4.3.2 Grade 2—Surface finish in way of rope contact shall
be in accordance with 7.2.
3. Descriptions of Terms Specific to This Standard
3.1 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
3.2 closed chock—a metal flared ring-like fitting mounted
this standard date, and the following:
on a ship through which mooring lines pass to tow or moor a
5.1.1 Quantity (number) of chocks required,
ship.
5.1.2 Size (opening,L×H),
3.3 mooring ring or pipe—a chock mounted in the bulwark
5.1.3 Type and grade,
and conforming to Type II or IV.
5.1.4 Primer and coating, if any (see 7.3), and
5.1.5 Marking.
3.4 ropecontactarea—thatpartofthefittingincontactwith
the mooring line in normal mooring operations.
6. Materials and Manufacture
6.1 Material shall be cast steel in accordance with Specifi-
1
This specification is under the jurisdiction of ASTM Committee F25 on Ships
cation A27/A27M, Grade 60-30.
and Marine Technology and is the direct responsibility of Subcommittee F25.01 on
6.2 For Types III and IV the manufacturer shall certify that
Structures.
Current edition approved Jan. 1, 2012. Published February 2012. DOI:10.1520/
chock is in compliance with Panama Canal requirements.
F2935-12.
2
6.3 Casting shall be smooth, fine grain, and free of cracks,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
hot tears, and blow holes, detrimental to end use. Defects
Standards volume information, refer to the standard’s Document Summary page on 2
having an area larger than 25 by 25 mm and a depth of more
the ASTM website.
3
than 10 % of the thickness in way thereof will be cause for
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036, http://www.ansi.org. rejection. Small defects in way of rope contact shall be welded
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
F2935−12
TABLE 1 Dimension Requirements (see Fig. 1)
(Unit: mm)
Nominal size L l l l l HH H RR 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 TD 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 equal to “T”.
NOTE 2—All final products must have a thickness no less than “T”.
FIG. 1Configuration of Deck Mounted Chocks
TABLE 2 Dimension Requirements (see Fig. 2)
(Unit: mm)
Nominal size L l l HH H RR R R R
1 2 1 2 1 2
...