ISO-7061-1993.pdf

INTERNATIONAL

STANDARD

Is0

Second edition 1993-05-I 5

Shipbuilding - Aluminium shore gangways for seagoing vessels

Construction navale - Planchons en aluminium pour navires de haute mer

Reference number

IS0 7061 :I 993(E)

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

IS0 7061:1993(E)

Foreword

IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.

International Standard IS0 7061 was prepared by Technical Committee lSO/rC 8, Shipbuilding and marine structures.

This second edition cancels and replaces the first edition (IS0 7061:1983), which has been technically revised.

0 IS0 1993

All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per-mission in writing from the publisher.

International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland

Printed in Switzerland ii

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

INTERNATIONAL STANDARD IS0 7061:1993(E)

Shipbuilding - Aluminium shore gangways for seagoing vessels

1 Scope

This International Standard specifies requirements for aluminium shore gangways. It does not apply to gangways for inland navigation vessels.

1.1 This International Standard applies to gangways

designed to be carried on board ships, to provide a lightweight, convenient and safe means of access from ship to shore, for use primarily by the ship’s crew. These gangways may also be used for access from ship to ship when conditions are favourable.

1.2 This International Standard applies to gangways

suitable for use horizontally or inclined up to an angle of 30’ from the horizontal. For angles of inclination greater than 30°, special consideration of the design of treads and decking may be necessary.

1.3 The gangways to which this International Stan-

dard applies are not intended to carry wheeled traffic such as loaded trolleys.

NOTE 1 Users of this International Standard, while ob-serving the requirements of the standard, should at the same time ensure compliance with any statutory require-ments, rules and regulations applicable to the individual ship concerned.

2 Normative references

The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publi-cation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most re-cent editions of the standards indicated below.

Members of IEC and IS0 maintain registers of cur-rently valid International Standards.

IS0 209-l : 1989, Wrought aluminium and aluminium alloys - Chemical composition and forms of products

- Part 1: Chemical composition.

IS0 630: 1980, Structural steels.

IS0 1181: 1990, Ropes - Manila and sisal - Specifi-cation.

IS0 1346: 1990, Ropes - Polypropylene - Specifica-tion.

IS0 1459: 1973, Metallic coatings - Protection against corrosion by hot dip galvanizing - Guiding principles.

IS0 1460: 1992, Metallic coatings - Hot dip galvanized coatings on ferrous materials - Gravimetric determination of the mass per unit area.

IS0 1461 :1973, Metallic coatings - Hot dip galvanized coatings on fabricated ferrous products - Requirements.

IS0 2408: 1985, Steel wire ropes for general purposes

- Characteristics.

IS0 3799:1976, Textile machinery and accessories - Hydraulic lubricating fittings for textile machinery.

IS0 6361.2:1990, Wrought aluminium and aluminium alloy sheets, strips and plates - Part 2: Mechanical properties.

IS0 6362-2: 1990, Wrought aluminium and aluminium alloy extruded rods/bars, tubes and profiles - Part 2: Mechanical properties.

3 Definitions

For the purposes of this International Standard, the following definitions apply.

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

3.1 gangway: Bridge structure to allow safe embarkation and disembarkation from ship to shore or access to another ship.

3.2 side stringer: Longitudinal-strength member of the gangway to which the cross-members, stanchions, roller or wheels and the lifting lugs, etc.

are attached.

3.3 cross-member: Part that holds the side stringer in position, and provides support for the decking.

3.4 decking: Flat-topped corrugated section or plate serving as the gangway floor.

3.5 tread: Batten fitted proud of the decking or deck plate level to give better foot grip when the gangway is inclined from the horizontal position.

A

3.6 guard rail: Hand and intermediate guide, sup-ported by stanchions, to prevent people falling from the gangway.

4 Dimensions

The dimensions of an aluminium shore gangway shall be in accordance with figure 1. The minimum overall length, I, shall be 2 m, with optional increments of approximately 0,5 m up to a length of 9 m. For gangways longer than 9 m, the increments shall be approximately 1 m in length, until the desired overall length is attained.

5 Materials

The materials for aluminium gangway components shall comply with the requirements of table 1.

Alternative materials may be used provided that they are at least as suitable in all respects for the intended duty and are equally acceptable to the purchaser.

Dimensions in millimetres

I 0 ”

\ IO/2 8

A*

A-A

Decking or deck plate Level

I- 600 4 Clear width

Figure 1 - General arrangement of a gangway (for item numbers, see table 1)

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

Table 1 - Materials Item number’) Component Material IS0 number Remark@)

IS0 209-I Al Mg4,5Mn0,7 (5083) Al SiMg(A) (6005 A) a Side stringer Aluminium alloy Al MgSi (6060) IS0 6361-2 Al Sil MgMn (6082)

IS0 6362-2

2 Cross-member Aluminium alloy

IS0 209-I Al SiMg(A) (6005 A) Al MgSi (6060)

IS0 6361-2 Al Sil MgMn (6082)

IS0 6362-2

3 Decking or deck plate

4 Tread

IS0 209-I Al Mg4,5Mn0,7 (5083) Aluminium alloy IS0 6361-2 Al Mg3 (5754)

Al Sil MgMn (6082)

IS0 209-l Al Mg4,5Mn0,7 (5083) Al Mg3 (5754)

Aluminium alloy Al SiMg(A) (6005 A) Al MgSi (6060)

IS0 6362-2 Al Sil MgMn (6082)

Hardwood e.g. oak

Carbon steel with rubber IS0 630 Grade Fe 430 (quality A) or plastics sleeves)

Roller

Wheel

Aluminium alloy

Carbon steel with solid tyre of rubber or plasticss)

IS0 209-l

IS0 6362-2

IS0 630

Al Mg4,5Mn0,7 (5083) Al Mg3 (5754) Al SiMg(A) (6005 A) Al MgSi (6060) Al Sil MgMn (6082)

Grade Fe 430 (quality A)

6 Stanchion

7 Guard rail

IS0 209-I Al SiMg(A) (6005 A) Aluminium alloy Al MgSi (6060)

IS0 6362-2 Al Sil MgMn (6082)

Carbon steel IS0 630 Grade Fe 430 (quality A)

IS0 209-I Al SiMg(A) (6005 A) Rigid rail Aluminium alloy Al MgSi (6060)

I SO 6362-2 Al Sil MgMn (6082)

Sisal or manila IS0 1181

Fibre rope Polypropylene IS0 1346 See 6.9 monofilament or film rope , Wire rope, PVC-coated guard-wire IS0 2408 Plastics-coated plastics- rope coated

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

Item numberl) Component Material IS0 number Remarks2)

Sisal or manila rope IS0 1181

8 Securing device Polypropylene IS0 1346 See 6.12 monofilament or film rope

, IS0 209-I Al Mg4,5Mn0,7 (5083) Al Mg3 (5754)

Aluminium alloy Al SiMg(A) (6005 A) 9 Toeboard IS0 6361-2 Al MgSi (6060)

IS0 6362-2 Al Sil MgMn (6082)

Hardwood e.g. oak

IS0 209-l Al Mg4,5Mn0,7 (5083)

10 Lifting lug Aluminium alloy Al SiMg(A) (6005 A) IS0 6361-2 Al MgSi (6060) IS0 6362-2 Al Sil MgMn (6082)

Al Anti-slip lug Aluminium alloy IS0 209-I Al Mg4,5Mn0,7 (5083) IS0 6361-2 Al Sil MgMn (6082)

1) The item numbers in this table refer to component parts in figure 1.

2) The numbers in parentheses are taken from the Registration Record of International Alloy Designations and Chemical Composition Limits for Wrought Aluminum and Wrought Aluminum Alloys (revised edition 1987), published by the Aluminum Association, Washington, D.C., USA.

3) The sleeve or tyre may have a ribbed or flat surface.

6 Design and construction 6.4 Side stringers

6.1 General design features

6.1.1 The manufacturer of the gangway shall be in-

formed of any unusual or hazardous conditions af-fecting the criteria for design of the gangway.

6.1.2 Direct contact between dissimilar metals shall

be avoided to prevent galvanic corrosion.

6.1.3 If the gangway is for use on tankers or ships

carrying flammable cargo, it shall be provided with an effective and marked earthing device, and shall be suitably surface-coated at the possible points of con-tact to prevent sparking.

Side stringers shall be constructed from extruded hollow section, rolled section, plate material or any combination of these.

6.5 Cross-members

Cross-members attached to the side stringers shall be arranged to support the decking, and shall be of bar, angle or hollow sections.

6.6 Decking

The decking shall comprise either continuous flat-topped longitudinal corrugated section, or individual flat plate section, which shall have a non-slip coating applied between the treads.

6.2 Design loading

6.7 Treads

The assembled gangway shall be designed to with-stand a uniform decking load of 4 000 N/m2 applied to the decking and treads while the gangway is in a horizontal position.

6.3 Factor of safety

The allowable stress used in the design of the gangway as specified in 6.2 shall be determined by applying a factor of safety of 2 on the 0,2 % proof stress (Rpo2) of the aluminium alloy used. I

Treads shall be of aluminium bar or rectangular hollow section, or of hardwood, and shall be spaced at reg-ular intervals of 300 mm to 400 mm longitudinally.

Treads shall have a minimum height of 30 mm above the decking; hardwood treads shall have a minimum section width of 40 mm in contact with the decking.

All treads shall be securely fitted, and shall extend over the full width of the gangway between the toeboards. Provision should be made for easy clean-

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

ing of the gangway between the treads, by leaving a 25 mm space between tread and toeboard at each side. Water shall not gather between the treads.

ensure protection of users’ feet from movement of the gangway, roller or wheel guards shall be provided.

At the maximum angle of use of the gangway there shall be no loss of contact between the roller or

6.8 Stanchions

wheels and the contact surface.

Stanchions shall be constructed from carbon steel or 6.12 Securing device attachments aluminium to comply with figure 1. They shall be fitted at regular intervals along the gangway, with a maxi-mum permitted interval of 1 500 mm. Stanchions and associated hand guides shall be designed for a side loading at the upper guide level of 500 N/m, without permanent deformation to stanchions or rigid hand guides when used. Stanchions of one of the following types may be fitted:

a) permanently fixed;

Suitable attachments shall be provided at appropriate points on both sides of the gangway, in order to con-nect the securing devices (see figure 1).

6.13 Lifting lugs

The gangway shall be provided with four lifting lugs, securely attached to the side stringers and positioned to produce a balanced lift.

b) hinged, with provision made to prevent inadver-tent collapse;

c) portable, with securing device to prevent acci-dental displacement from the socket or base sup-port.

Galvanized stanchions, where specified, shall comply with the requirements of IS0 1459, IS0 1460 and

IS0 1461.

6.9 Hand and intermediate guides

6.14 Anti-slip lugs

The gangway shall be provided with anti-slip lugs securely attached to the side stringers, and positioned to prevent the gangway slipping from its position on the bulwarks or other supporting structure.

6.15 Protection against corrosion and rot

Steel parts of the gangway shall be provided with anti-corrosion coatings. If contact of dissimilar metals cannot be avoided, the surface of contact shall be

Hand and intermediate guides shall be provided to comply with figure 1 and shall be selected from one of the following types:

protected particularly carefully.

Wooden parts of the gangway shall be suitably pro-tected against rot and fungi.

a) continuous and adequately tensioned sisal, manila, polypropylene or plastics-covered wire rope, hav-ing a minimum rope diameter of 16 mm;

b) continuous rigid aluminium solid or hollow section.

6.16 Rope net

In some countries, a safety net is required: in these cases, it shall be spread underneath the gangway.

In case of fibre rope or wire rope rails, a way to re-tighten such rails should be provided. 7 Quality of manufacture

Polypropylene ropes shall be certified effective against actinic degradation for two years exposure in tropical conditions.

7.1 The assembly, comprising side stringers, cross-

members and decking, together with all ancillary fit-tings, shall be visibly free from defects and distortion.

6.10 Toeboards 7.2 All components shall be free from exposed

rough or sharp edges likely to cause injury.

Toeboards shall be fitted,,to each side of the gangway to a minimum height of 150 mm. 7.3 Care shall be taken in the preparation, riveting, bolting or welding of aluminium structures to ensure

6.11 Roller or wheels

that the permissible design stresses are not ex-ceeded.

ameter shall be positioned at one end of the gangway.

Rollers and wheels shall be provided with self-lubricated bearings or fitted with lubrication nipples to IS0 3799 specifications having a thread Ml0 x 1. To

A roller or wheels of 100 mm minimum outside di- 8 Acceptance tests

The following tests shall be carried out at the manu-facturer’s works.

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

8.1 Type test

One gangway of the longest design length for each stringer type shall be tested by the methods given below and a test certificate made available to the purchaser on request.

The deflection due to loading (according to 6.2) shall not exceed the value of the overall length divided by 75 .

Each gangway submitted for type test shall be fully assembled with all fittings and subjected to the tests given in 8.3.1 to 8.3.3.

8.2 Individual test

Individual gangways manufactured to a design which has been satisfactorily type-tested in accordance with

8.1 shall be subjected to the tests given in 8.3.1 and 8.3.2, if requested by the purchaser.

8.3 Test methods

’ 8.3.1 Lifting

Lift the gangway by means of the lifting lugs provided.

After the test there shall be no evidence of strain to the lugs or the adjacent structure.

8.3.2 Initial sag

Initial sag, Y, is determined as follows:

Place the gangway horizontally on supports positioned at one end under the roller or wheels and at the other end close to the anti-slip lug (see figure 1). The gangway shall be fully assembled with all fittings, comprising the dead load. Stretch a thin string or wire tightly between the two support points. Then meas-ure the maximum vertical distance appearing be-tween the horizontal line and the base of the gangway. This measurement shall be taken for both side stringers.

The average of the two readings Y, and Y2 for initial sag is taken as:

y1 +Y2 y=-

In the case of individual testing, the initial sag shall not be greater than that recorded for the type test.

8.3.3 Deflection under load

With the gangway still supported as in 8.3.2, carry out the deflection test immediately after the results of initial sag are determined. Apply, without shock, a uniform load equivalent to 5 000 N/m2 to the longi-tudinal centreline of the decking. The load shall be arranged from a selection of conveniently sized sandbags or other material that will not damage the gangway, and located at equally spaced intervals of not more than 1 m. Where the design incorporates individual decking plates, apply a load equivalent to 5 000 N/m2 to each plate. Maintain the test load for 15 min before the total deflection of the gangway at each side stringer is measured.

The maximum deflection for each side stringer shall be measured as the maximum vertical distance be-tween the string or wire stretched tightly between the support points and the base of the gangway. The av-erage of the two readings Y’, and Y', is taken as the total deflection YT:

Y’, + Y2 yT= 2

The deflection due to loading AY shall be calculated by subtracting the initial sag from the total deflection as follows:

Y, +Y, y1 +Y2 AY= 2 o2

9 Marking

Each gangway shall be permanently marked by means of a rating plate prominently displayed. The rating plate shall contain information relevant to the gangway, including the following:

a) manufacturer’s name or trademark;

b) type number and serial number;

c) number of this International Standard (IS0 7061);

d) overall length;

e) maximum permitted angle of inclination;

f) design loading.

10 Inspection

10.1 Gangways subjected to a type test shall be in-

spected after testing to ensure that there are no signs of residual weakness or damage.

10.2 All gangways shall be visually checked after

testing to ensure that:

a) there is no distortion of the side stringers;

b) the decking or deck plates are adequately secured;

c) the roller or wheels revolve freely;

d) if applicable, the stanchions, hand and intermedi-ate guides can be easily erected in position;

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

e) removable fittings for rigid joints can be properly stowed when the gangway is dismantled;

c) overall length, in metres;

d) maximum permitted angle of inclination, in de-f 1 the rating plate is affixed and correct.

11 Designation grees.

EXAMPLE

A gangway conforming to this International Standard shall be designated as follows, in the order given:

The designation of an aluminium shore gangway of overall length 9 m, limited to 30’ angle of inclination, is:

a) description: gangway; Gangway IS0 7061 - 9 - 30

b) number of this International Standard: IS0 7061;

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

This page intentionally left blank

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

This page intentionally left blank

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.

UDC 629.12.011.57

Descriptors: shipbuilding, embarkation devices, aluminium products, gangways, specifications, dimensions, construction, tests, designation, marking.

Price based on 7 pages

Licensed to June Swan. ANSI order X_147919. Downloaded 11/9/2009 1:02 PM. Single user license only. Copying and networking prohibited.