BS 302-8 1989 Specification for Higher Breaking Load Ropes (WITHDRAWN-REF ONLY)

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BRITISH STANDARD BS 302-8:1989

Stranded steel wireropes —

Part 8: Specification for higherbreaking load ropes



BS 302-8:1989

This British Standard, havingbeen prepared under thedirection of the MechanicalHandling Standards PolicyCommittee, was publishedunder the authority of theBoard of BSI and comesinto effect on31 May 1989

© BSI 03-1999

The following BSI referencesrelate to the work on this

standard:Committee reference MHE/2

Draft for comment 87/71950 DC

ISBN 0 580 16647 3

Committees responsible for thisBritish Standard

The preparation of this British Standard was entrusted by the Mechanical

Handling Standards Policy Committee (MHE/-) to Technical CommitteeMHE/2, upon which the following bodies were represented:

Associated Offices Technical Committee

Association of Supervisory and Executive Engineers

British Coal Corporation

British Ports Association and the National Association of Ports

Employers

British Steel Industry (Wire Section)

Bureau Veritas

Chain Testers’ Association of Great Britain

Department of the Environment (Property Services Agency)Federation of Manufacturers of Construction Equipment and Cranes

Federation of Wire Rope Manufacturers of Great Britain

Health and Safety Executive

Institution of Mechanical Engineers

Institution of Mining and Metallurgy

Institution of Mining Engineers

Lloyds’ Register of Shipping

Ministry of Defence

National Association of Lift Makers

Zinc Development Association

Amendments issued since publication

Amd. No. Date of issue Comments



BS 302-8:1989

© BSI 03-1999 i

Contents

Page

Committees responsible Inside front cover

Foreword ii1 Scope 1

2 Definitions 1

3 Compliance 1

4 Wire rope constructions and sizes 1

5 Material 1

6 Lay 1

7 Lubrication 1

8 Minimum breaking load 1

Table 1 — Wire rope constructions and sizes 1

Table 2 — Strength of round strand ropes 1

Table 3 — Strength of rotation resistant ropes 2Table 4 — Tensile grade of wire 2

Publications referred to Inside back cover



BS 302-8:1989

ii © BSI 03-1999

Foreword

This Part of BS 302 has been prepared under the direction of the MechanicalHandling Standards Policy Committee. Part 8 and Part 7 are new Parts of theBS 302 series, which is itself a combined revision of BS 302:1968, BS 236:1968,

BS 329:1968, BS 330:1968, BS 365:1968 and BS 3530:1968, which werewithdrawn in 1987. BS 302 is now published in eight Parts and takes account ofboth national and international developments in steel wire ropes since 1968.

This Part specifies requirements for higher breaking load steel wire ropes thatare additional to the general requirements in Part 1. Other Parts specify theadditional requirements for other particular uses of ropes:

— Part 2: Specification for ropes for general purposes;

— Part 3: Specification for zinc coated ropes for ships;

— Part 4: Specification for ropes for lifts;

— Part 5: Specification for ropes for hauling purposes;

— Part 6: Specification for ropes for mine hoisting;

— Part 7: Specification for large diameter ropes for general purposes.

In line with the principles of international standard ISO 2408, published by theInternational Organization for Standardization (ISO), the rope constructions aregrouped according to the number of outer wires in the strands. The generalrequirements of BS 302-1 and the methods used for calculating breaking loadsand approximate masses are in accordance with ISO 2408. In respect ofindividual usages the ropes in Parts 2 and 3 are in accordance with ISO 2408 andthose in section two of Part 4 in accordance with ISO 4344. In each of these Parts,however, certain additional ropes still in common use in the UK have beenincluded. Part 7 is technically equivalent to ISO 8369. An ISO standard on higherbreaking load rope is in preparation.

In line with current international practice, the term “zinc coated” has been

adopted in this standard in place of “galvanized”. The terms are synonymous.Purchasers ordering products to comply with BS 302 are advised to specify intheir purchasing contract that the manufacturer operates a quality systemcomplying with the appropriate Part of BS 5750, or suitable equivalent, to assurethemselves that the products consistently achieve the required level of quality.

Wire rope users will find valuable information in the companion publicationBS 6570.

A British Standard does not purport to include all the necessary provisions of acontract. Users of British Standards are responsible for their correct application.

Compliance with a British Standard does not of itself confer immunityfrom legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii,

pages 1 and 2, an inside back cover and a back cover.

This standard has been updated (see copyright date) and may have hadamendments incorporated. This will be indicated in the amendment table onthe inside front cover.



BS 302-8:1989

© BSI 03-1999 1

1 Scope

This Part of BS 302 specifies the requirements for

steel wire ropes for special purposes of higherbreaking load than given in BS 302-2 and is for usein conjunction with BS 302-1.

NOTE 1 Information to be supplied by the purchaser on theenquiry and order is given in appendix F of BS 302-1:1987.

NOTE 2 The titles of the publications referred to in thisstandard are listed on the inside back cover.

2 Definitions

For the purposes of this Part of BS 302 thedefinitions given in BS 302-1 apply.

3 Compliance

Ropes in accordance with BS 302-8 shall complywith this Part and with BS 302-1.

4 Wire rope constructions and sizes

Constructions and size ranges of steel wire ropesshall be as given in Table 1.

NOTE In the absence of a precise indication by the purchaseron the enquiry and order, the choice of construction within a ropegroup is at the discretion of the manufacturer.

Table 1 — Wire rope constructions and sizes

5 Material

5.1 Wire

5.1.1 General. The wire used for the manufacture ofwire ropes, as given in Table 1, shall comply withsections one and two of BS 2763:1982. Themechanical tests shall be confined to the tensilestrength and torsion requirements.

NOTE The nominal tensile strength of the wire is at thediscretion of the rope manufacturer.

5.1.2 Wire finish. The wire shall be bright or class Zzinc coated for all constructions. Zinc coating shall

comply with BS 2763.

5.2 Rope main core

The rope main core shall be of steel. For

six-stranded ropes it shall be an independent wirerope (IWRC) and for low rotation ropes it shall be awire strand core (WSC).

6 Lay

Six-stranded ropes shall be of right-hand ordinarylay. Multi-strand ropes shall have either anordinary or a Lang’s lay outer layer.

7 Lubrication

The rope shall be lubricated in stranding with alubricant complying with 3.3 of BS 302-1:1987.

8 Minimum breaking load

The minimum breaking loads of round strand androtation resistant ropes shall be as given in Table 2and Table 3.

NOTE 1 The values are calculated as given in C.1 ofBS 302-1:1987 except that the tensile grade of the wire, R0 innewtons per millimetre squared, is based on notional figures asgiven in Table 4.

NOTE 2 For guidance, Table 2 and Table 3 also give theapproximate masses of ropes, calculated as described in C.2 ofBS 302-1:1987.

Table 2 — Strength of round strand ropesRopegroup

Description Size range(diameter)

mm

6 × 19 8 to 12 outer wires in astrand, two or threelayers over a king wire.Wires equal laid

9 to 52

6 × 36 14 to 18 outer wires in astrand, three or morelayers of wire over a kingwire. Wires equal laid

9 to 60

17 × 7or18 × 7

17 or 18 strands in rope.Two layers of strand overa steel core

9 to 26

Nominaldiameter

(d)

Minimumbreakingforce

Minimumbreakingload

Approximatemass

mm kN t kg/100 m

91011

59.473.388.7

6.067.479.04

32.239.848.2

121314

106124144

10.812.614.7

57.367.378.0

16181920

188238265293

19.224.327.029.9

102129144159

222426

355402472

36.241.048.1

193229269

283236

547715904

55.872.992.2

312408516

404448

1 1201 3101 560

114134159

637771917

525660

1 8302 1202 440

187216249

1 0761 2481 433



BS 302-8:1989

2 © BSI 03-1999

Table 3 — Strength of rotation resistant ropes

Table 4 — Tensile grade of wire

Nominal

diameter(d)

Minimum

breakingforce

Minimum

breakingload

Approximate

mass

mm

91011

kN

54.767.681.8

t

5.586.898.34

kg/100 m

31.639.047.2

121314

97.3114132

9.9211.613.5

56.265.976.4

16181920

173219244270

17.622.324.927.5

99.8126141156

222426

327389457

33.339.746.6

189225264

Type of rope Nominal diameter (d) Tensilegrade(R0)From Up to but

notincluding

mm mm N/mm2

Round strand 92442

244260

2 0601 9601 900

Rotation resistant 9 26 2 060



BS 302-8:1989

© BSI 03-1999

Publications referred to

BS 302, Stranded steel wire ropes.

BS 302-1, Specification for general requirements.

BS 302-2, Specification for ropes for general purposes.BS 302-3, Specification for zinc coated ropes for ships1).

BS 302-4, Specification for ropes for lifts1).

BS 302-5, Specification for ropes for hauling purposes1).

BS 302-6, Specification for ropes for mine hoisting 1).

BS 302-7, Specification for large diameter ropes for general purposes1).

BS 2763, Specification for round carbon steel wire for wire ropes.

BS 5750, Quality systems1).

BS 6570, Code of practice for the selection, care and maintenance of steel wire ropes1).

ISO 2408, Steel wire ropes for general purposes — Characteristics1).

ISO 4344, Steel wire ropes for lifts1).

ISO 8369, Large diameter steel wire ropes1).

1) Referred to in the foreword only.



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BS 302-8 1989 Specification for Higher Breaking Load Ropes (WITHDRAWN-REF ONLY)