ISO/R 347:1963

UDC 629.12
Ref. No.: ISO/R 347 - 1963 (E)
IS0
I NT ERN AT1 ON AL ORGANIZATION FOR STAND AR D I ZATl O N
I SO R ECO M M EN DATI O N
R 347
SHIPBUILDING DETAILS
ANCHOR CHAINS
END SHACKLES
1st EDITION
October 1963
COPYRIGHT RESERVED
The copyright of IS0 Recommendations and IS0 Standards
belongs to IS0 Member Bodies. Reproduction of these
documents, in any country, may be authorized therefore only
by the national standards organization of that country, being
a member of 1SO.
For each individual country the only valid standard is the nationai standard of that country.
Printed in Switzerland
Also issued in French and Russian. Copies to be obtained through the national standards organizations.

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BRIEF HISTORY
The IS0 Recommendation R 347, Anchor Chains. End Shackles, was drawn up by Tech-
nical Committee ISO/TC 8, Shipbuilding Details, the Secretariat of which is held by the
Stichting Nederlands Normalisatie-instituut ("1).
Work on this question by the Technical Committee began in 1960, takin; into account the
stiidies which had been made hy the former International Federation of the National Standard-
izing Associations (ISA), and led, in 1961, to the adoption of a Draft IS0 Recommendation.
In June 1962, this Draft IS0 Recommendation (No. 509) was circulated to all the IS0
Member Bodies for enquiry. It was approved, subject to a few modifications of an editorial
nature, by the following Member Bodies :
France New Zealand
Belgium
Burma Germany Poland
Chile Greece Spain
Czechoslovakia Japan Switzerland
Finland Netherlands Turkey
United Kingdom
Two Member Bodies opposed the approval of the Draft:
Italy, U.S.S.R.
The Draft IS0 Recommendation was then submitted by correspondence to the IS0 Council,
which decided, in October 1963, to accept it as an IS0 RECOMMENDATION.
-3-

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ISO/R 347 - 1963 (E)
IS0 Recommendation R 347 Octo ber 1963
SHIPBUILDING DETAILS
ANCHOR CHAINS
END SHACKLES
1. GENERAL REMARKS
1.1 Shape and dimensions
1.1.1 End shackles and end shackle bolts should bc of the shapes and proportions shown in
this IS0 Recommendation, and their dimensions should be in accordance with the
Table. All end shackles should be of uniform shape.
1.1.2 All dimensions specified in this IS0 Recommendation apply aJter the end shackles
have been subjected to the statutory proof loads.
1.2 Tolerance
The allowable manufacturing tolerance for the dimensions d,, B, B,, C, H and E is
i 2 per cent.
1.3 Material
The quality of the material used for the manufacture of the end shackle should not be
.
inferior in any respect to that of the material used for the manufacture of the other parts
assembled to form the anchor chain.
The design, material and tests of the complete anchor chains are subject to the legal require-
ments of the countries concerned and of the recognized approving authorities.
1.4 References
For other parts of the anchor chain, see:
IS0 Recommendation R 39, Anchor Chains - Lugless Joining Shackles, Kenter Type,
IS0 Recommendation R 40, Anchor Chains - Studless Links, and
IS0 Recommendation R 170, Anchor Chuins, Strid Links (Conimon Links, Eniirged Links,
End Links and Joining Shackles).

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ISO/R 347 - 1963 (E)
2. DIMENSIONS
C
I -+
A nominal dimension of end shackle = d
d diameter of material of common link*
2 values: d' = millimetre value of d
d" = inch value of d, transposed
into rounded off milli-
metre value
diameter of material of end sha
...