BS ISO 5480:2020 pdf download – Ships and marine technology – Guardrails for cargo ships

02-26-2022 comment

BS ISO 5480:2020 pdf download – Ships and marine technology – Guardrails for cargo ships
1 Scope
This document specifies dimensions, materials, quality of manufacture and finish for guardrails and stanchions fitted on exposed freeboard and superstructure decks of cargo ships to prevent personnel falling overboard or to lower decks. It is not applicable to guardrails fitted near compasses.
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.
ISO 65, Carbon steel tubes suitable for screwing in accordance with ISO 7-1
ISO 887, Plain washers for metric bolts, screws and nuts for general purposes — General plan
ISO 898-1, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts, screws and studs with specified property classes — Coarse thread and fine pitch thread
ISO 1461, Hot dip galvanized coatings on fabricated iron and steel articles — Specifications and test methods
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
— IEC Electropedia: available at
3.1 guardrail
construction comprising stanchions (3.2), rails (3.3), toprails (3.4) and stays (3.5)
Note 1 to entry: See Figure 1 and Figure 4.
3.2 stanchion
principal vertical structural member of a guardrail (3.1) system
3.3 rail
horizontal member between stanchions (3.2)
3.4 toprail
uppermost rail (3.3) in a series of rails
3.5 stay
secondary structural support attached to stanchions (3.2) and deck
5.4.1 Stays shall be made of flat bars of 60 mm × 9 mm, or of flat bars having a section modulus at least equal to that of 60 mm × 9 mm flat bars.
5.4.2 The size and/or section modulus of the stays may be reduced if the sum of the section modulus of the actual stanchions and stays at onboard, by using the calculation method given in Annex A, is greater than the sum of the section modulus specified in 5.2 and 5.4.1.
5.4.3 A stay is not needed on every stanchion and shall be fitted depending on the length of the guardrail and the shipboard conditions.
5.4.4 The stay shall be welded to stanchions at about mid-height and under an angle of approximately 30°.
5.5 Fairlead positions
Typical arrangements of guardrails at fairlead positions are shown in Figure 4 for guidance.
6.1 Guardrails and stanchions shall be free from any defects and imperfections likely to cause injury to persons using them.
6.2 The rails, stanchions and stays shall be given protective finishes appropriate to their material and to their shipboard location. If galvanizing is applied, it shall be carried out in accordance with ISO 1461.

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