ASTM F1099M-18(2023)

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: F1099M − 18 (Reapproved 2023) An American National Standard
Standard Specification for
Rat Guards, Ship’s (Metric)
This standard is issued under the fixed designation F1099M; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope 3.1.1 Type I—Multiple-line (doubling up), self-adjustable,
accommodating the mooring line combinations listed in Table
1.1 This specification covers the materials, dimensions, and
1.
assembly of steel and aluminum rat guards.
3.1.2 Type II—Single-line, self-adjustable, accommodating
1.2 Rat guards are intended to prevent rats from boarding
a single 5 mm wire to a 76 mm diameter mooring line.
ships by way of mooring lines.
3.1.3 Type III—Conical shape with tapered, slotted sleeve.
1.3 The values stated in SI units are to be regarded as Type III rat guards shall be of the following sizes: (a) 75 mm,
(b) 125 mm, and (c) 200 mm.
standard. No other units of measurement are included in this
standard.
3.2 Types I and II rat guards (see 3.1.1 and 3.1.2) are
1.4 This standard does not purport to address all of the designed to be installed from the deck or pier without a person
safety concerns, if any, associated with its use. It is the
physically coming in contact with the mooring lines or hawser,
responsibility of the user of this standard to establish appro- by lowering and positioning the guards away from the ship’s
priate safety, health, and environmental practices and deter-
hull with two ropes that are permanently attached as guide and
mine the applicability of regulatory limitations prior to use. tie ropes (see Fig. 1).
1.5 This international standard was developed in accor-
3.3 Type III rat guards (see 3.1.3) require a person to contact
dance with internationally recognized principles on standard-
the mooring line to pull the two halves of the conical guard
ization established in the Decision on Principles for the
around the mooring line, wrap the slotted sleeves (see Fig. 2)
Development of International Standards, Guides and Recom-
to the line, and physically close any opening between the
mendations issued by the World Trade Organization Technical
mooring line and the circular opening at the center of the
Barriers to Trade (TBT) Committee.
guard.
2. Referenced Documents
4. Ordering Information
2.1 ASTM Standards:
4.1 Orders for rat guards under this specification shall
A653M Specification for Steel Sheet, Zinc-Coated (Galva-
include the following information:
nized) or Zinc-Iron Alloy-Coated (Galvannealed) by the
4.1.1 ASTM designation.
Hot-Dip Process
4.1.2 Type required (see 3.1):
B209M Specification for Aluminum and Aluminum-Alloy
4.1.2.1 If Type III, material required (see 5.1.3).
Sheet and Plate (Metric) (Withdrawn 2021)
4.1.2.2 If Type III, size required (see 3.1.3).
4.1.3 Quantity required.
3. Classification
4.1.4 Optional requirements, if any (see Supplementary
3.1 Rat guards shall be classified into three types as follows:
Requirements S1 through S3).
5. Materials and Manufacture
This specification is under the jurisdiction of ASTM Committee F25 on Ships
5.1 Materials:
and Marine Technology and is the direct responsibility of Subcommittee F25.07 on
General Requirements.
5.1.1 Type I rat guards shall be made of aluminum-alloy
Current edition approved May 1, 2023. Published May 2023. Originally
sheet metal conforming to the requirements of Specification
approved in 1987. Last previous edition approved in 2018 as F1099M – 18. DOI:
B209M, 6061-T6, or 5052-H32.
10.1520/F1099M-18R23.
5.1.2 Type II rat guards shall be made of galvanized sheet
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
steel conforming to the requirements of Specification A653M,
Standards volume information, refer to the standard’s Document Summary page on
Coating Designation 450. The coating shall be a minimum of
the ASTM website.
3 450 g/m in accordance with the triple-spot test of Specifica-
The last approved version of this historical standard is referenced on
www.astm.org. tion A653M.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
F1099M − 18 (2023)
TABLE 1 Mooring Line Combinations for Type I Rat Guards
Mooring Lines Diameter, mm Number of Lines
5 wire as required
25–33 line 3 or more
41–50 line 3
50–82 line 2
5.1.3 Type III rat guards shall be made of either of the
materials specified in 5.1.1 and 5.1.2 (see 4.1.2.1).
5.2 Manufacture:
5.2.1 Types I and II rat guards shall be provided with the
following:
5.2.1.1 Hinge Bolt—An M 7 × 1 hexagon head bolt 20 mm
long with elastic stop nut and washer. All parts shall be
corrosion-resistant steel.
5.2.1.2 Guide and Tie Rope—Polyester or nylon of good
commercial quality, 6 mm or 9 mm diameter by 6 m long.
5.2.1.3 Grommet—Good commercial quality brass and of
size suitable for the guide and tie ropes.
5.2.2 Type III Rat Guards—Type III rat guards shall consist
of two half disks and two half tapered sleeves. Both halves
shall be identical except one half shall be provided with a “U”
shaped sleeve.
5.2.2.1 The hinge bolt provided with each rat guard shall
consist of a commercial M 7 × 1 hexagon head bolt, 20 mm
long nut, and washer. All parts shall be corrosion-resistant
steel.
5.2.2.2 The galvanized steel or aluminum sleeve shall be
slotted as specified in Table 2 and Fig. 2, so that when the rat
guard is in place, it may be drawn tightly against the hawser,
with lashing. The formed sleeves shall be tapered to permit
nesting of the rat guards, for compact shipping.
5.2.2.3 When the rat guard is made of galvanized steel, the
sleeve shall be riveted and soldered to the disk with tinner’s
type rivets, No. 3, 4 mm diameter for each half sleeve. The
number of rivets shall be the same as the number of prongs.
Soldering of the half sleeve flange to the half disk shall be
continuous, inside and outside (see Fig. 2).
5.2.2.4 When the rat guard is made of aluminum alloy
sheets, the sleeve shall be spot welded and riveted to the disk.
Spacing of spot welds shall not exceed 50 mm with a minimum
of four spot welds provided on each half of the rat guard. The
rivets shall be equivalent to No. 3, 4 mm diameter. Five rivets
shall be installed in each half of the guard. Rivets shall be
located equidistant, between adjacent spot welds (see Fig. 2).
6. Dimensions and Permissible Variations
6.1 Dimensions of Type I rat guards 66 mm shall be as
follows: FIG. 1 Types I and II Rat Guard Configuration
F1099M − 18 (2023)
TABLE 2 Dimensions for Type III Rat Guards
Number
Dimensions (see Thickness of Disk, Sleeve,
of Prongs
Fig. 2), mm and Guide, mm
in
Size Complete
Steel,
Sleeve
Aluminum
A B Galvanized
(See
Alloy Sheet
Sheet
5.2.2.2)
75 75 1000 6 1.4 1.6
125 125 1300 10 1.4 1.6
200 200 1300 16 1.4 1.6
6.3 Dimensions of Type III rat guards shall be as specified
in Table 2 and Fig. 2.
7. Workmanship, Finish, and Appearance
7.1 Workmanship shall be of the highest quality throughout
and in conformance with the accepted commercial standard
practice for this type of equipment.
7.2 Guards shall be free of exposed burrs, raw or sharp
edges, or other imperfections that may be injurious to person-
nel or lines.
8. Product Marking
8.1 Each rat guard shall be stenciled with black paint or
stamped with the ASTM standard designation and size in
letters and numbers approximately 25 mm high.
8.2 The manufacturer may stamp his brand name or logo.
9. Packaging and Package Marking
9.1 Unless otherwise specified in the contract or purchase
FIG. 2 Assembly of Type III Rat Guards
order (see 4.1.4), packaging shall conform to manufacturer’s
normal commercial practice, and in such a manner that will
ensure acceptance by common carrier and afford protection
6.1.1 Overall height shall be 1000 mm.
against physical and mechanical damage during shipment.
6.1.2 Overall thickness shall be 40 mm maximum.
Shipping containers shall conform to carrier regulations as
6.2 Dimensions of Type II rat g
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