ISO 13795:2020

INTERNATIONAL ISO
STANDARD 13795
Second edition
2020-08
Ships and marine technology — Ship's
mooring and towing fittings — Welded
steel bollards for sea-going vessels
Navires et technologie maritime — Corps-morts et ferrures de
remorquage de navires — Bittes d'amarrage en acier soudées pour
navires de haute mer
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Classification . 1
4.1 Type . 1
4.2 Nominal sizes . 1
5 Dimensions . 2
6 Materials . 2
7 Construction . 2
8 Manufacturing and inspection . 2
9 Marking . 2
Annex A (normative) Basis for strength assessment of welded steel bollards .10
Bibliography .13
Foreword
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electrotechnical standardization.
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www .iso .org/ iso/ foreword .html.
This document was prepared Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee
SC 4, Outfitting and deck machinery.
This second edition cancels and replaces the first edition (ISO 13795:2012), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— technical guidelines have been added in 7.4 and 7.5;
— the definition of SWL (3.1) has been reworded;
— the mark numbers and extension numbers in Figures 1 and 2 have been amended;
— the values in Table 1 and Table 2 have been amended;
— the text in Clause A.5 has been amended.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

Introduction
A bollard is a type of ship’s mooring and towing fitting installed on board to belay the mooring and
towing rope.
INTERNATIONAL STANDARD ISO 13795:2020(E)
Ships and marine technology — Ship's mooring and towing
fittings — Welded steel bollards for sea-going vessels
1 Scope
This document specifies the types, nominal sizes, dimensions and materials, as well as construction,
manufacturing and marking requirements, for welded steel bollards suitable for installation on sea-
going vessels to meet normal mooring and towing requirements.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
IMO Circular MSC/Circ.1175, Guidance on shipboard towing and mooring equipment
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
safe working load
SWL
safe load limit (maximum permissible load) of the fittings used for mooring
3.2
TOW
safe load limit (maximum permissible load) of the fittings used for normal and other towing operations
4 Classification
4.1 Type
Depending on the construction, welded steel bollards shall be classified as belonging to one of the
following two types:
a) Type A: with compact base plate;
b) Type B: with wide base plate.
4.2 Nominal sizes
The nominal sizes, D , of bollards are denoted by reference to the outside diameter of the post, in
n
millimetres, in terms of the nearest number drawn from a basic series of preferred numbers. For the
bollards having the same post diameter, the letter of the alphabet, i.e. A or B, is followed by the nominal
size for the different safe working loads (SWL).
The nominal sizes are: 150, 200, 250A, 250B, 300A, 300B, 350A, 350B, 400A, 400B, 450A, 450B, 500A,
500B, 550A, 550B and 600.
5 Dimensions
The bollards shall have dimensions and particulars in accordance with Tables 1, 2, 3 and 4, and
Figures 1 and 2.
6 Materials
The following materials shall be used for manufacturing the components of the bollards:
— base plates: weldable steel plates having a yield point of not less than 235 N/mm ;
— posts: weldable steel plates having a yield point of not less than 235 N/mm or equivalent steel tubes.
7 Construction
7.1 The posts of the bollards shall be constructed from steel pipes or formed from plate.
7.2 Fins shall be installed to keep the ropes as low as possible so as to reduce the loads to the bollard
posts from the mooring/towing ropes.
7.3 An eye plate for tying the stopping-off rope or chain shall be provided.
7.4 The selection of ship’s mooring fittings and mooring lines should take into account the diameter, D,
of surfaces of mooring fittings that are in contact with the mooring line diameter, d, (D/d ratio) to reduce
or mitigate bend ross of strength.
7.5 The tensile strength of mooring rope may be reduced depending on bend radius (D/d ratio)
through the mooring fittings, in accordance with the rope manufacturer’s guidelines.
8 Manufacturing and inspection
8.1 All surfaces of the bollards, including welded surfaces, sh
...