8/3/2019 302.1

1/16

BRITISH STANDARD BS 302-1:1987

Stranded steel wireropes

Part 1: Specification for generalrequirements

UDC 677.721

8/3/2019 302.1

2/16

BS 302-1:1987

This British Standard, havingbeen prepared under thedirection of the MechanicalHandling StandardsCommittee, was publishedunder the authority of theBoard of BSI and comesinto effect on30 June 1987

BSI 01-1999

First published, as BS 302,September 1927

First revision, as BS 302and BS 621, December 1957

Second revision, as BS 302,May 1968

Third revision, as BS 302-1,June 1987

The following BSI referencesrelate to the work on thisstandard:

Committee reference MHE/2

Draft for comment 85/70785 DC

ISBN 0 580 15632 X

Committees responsible for thisBritish Standard

This British Standard was entrusted by the Mechanical Handling Standards

Committee (MHE/-) to Technical Committee MHE/2, upon which the followingbodies were represented:

Associated Offices Technical Committee

Association of Supervisory and Executive Engineers

British Coal

British Ports Association and the National Association of Ports Employers

British Railways Board

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 Engineers

Institution of Mining and Metallurgy

Ministry of Defence

National Association of Lift Makers

Zinc Development Association

Amendments issued since publication

Amd. No. Date of issue Comments

8/3/2019 302.1

3/16

BS 302-1:1987

BSI 01-1999 i

Contents

Page

Committees responsible Inside front cover

Foreword ii1 Scope 1

2 Definitions 1

3 Material 2

4 Manufacture 3

5 Diameter and ovality of rope 3

6 Length of rope 3

7 Inspection and testing 4

8 Certificates 6

9 Identification 7

10 Packing 7

Appendix A Method of measuring diameter 8Appendix B Method of measuring actual breaking load 8

Appendix C Determination of minimum breaking force and mass of rope 8

Appendix D Designation of the construction 9

Appendix E Method of testing wires taken from the completed rope 9

Appendix F Information to be supplied by the purchaser onenquiry and order 10

Figure 1 Method of measuring rope diameter 8

Table 1 Rope diameter tolerances 3

Table 2 Ovality tolerance 3

Table 3 Tolerances on nominal diameter of rope wire 4

Table 4 Minimum number of twists for general purpose wire 5Table 5 Minimum number of twists for high duty wire: bright ordrawn zinc coated class Z 5

Table 6 Reverse bends 6

Table 7 Minimum weight of zinc: general purpose and high duty wire 6

Table 8 Test length 8

Table 9 Values for factorsKandK9 9

Table 10 Number of wires in a sample 10

Publications referred to Inside back cover

8/3/2019 302.1

4/16

BS 302-1:1987

ii BSI 01-1999

Foreword

This Part of BS 302 has been prepared under the direction of the MechanicalHandling Standards Committee. It is one Part of a combined revision ofBS 302:1968, BS 236:1968, BS 329:1968, BS 330:1968, BS 365:1968 and

BS 3530:1968, which are withdrawn. BS 302 is now published in six Parts andtakes account of both national and international developments since 1968.

This Part (Part 1) specifies general requirements for all steel wire ropes coveredby this standard. The other Parts specify additional requirements for particularuses 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.

Two further Parts are in preparation, covering larger diameter ropes (64 mm

to 205 mm diameter) and higher strength ropes and will be Parts 7 and 8respectively.

In line with the principles of international standard ISO 2408, published by theInternational Organization for Standardization (ISO), the 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 fully in accordance withISO 2408 and those in section 2 of Part 4 are in accordance with ISO 4344. In eachof these parts however, certain additional ropes still in common use in the UKhave been included.

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 to BS 302 are advised to specify in their purchasing contractthat the manufacturer operate a quality system in compliance with theappropriate Part of BS 5750, or suitable equivalent, to ensure themselves thatproducts claimed to comply with BS 302 consistently achieve the required level ofquality.

Wire rope users will find valuable information in the companion publicationBS 6570 Code of practice for the selection, care and maintenance of steel wireropes.

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 to 10, 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.

8/3/2019 302.1

5/16

BS 302-1:1987

BSI 01-1999 1

1 Scope

This Part of BS 302 specifies the general

requirements for the steel wire ropes whoseparticular requirements are specified in other Partsof this standard.

NOTE 1 Information on the methods of calculating minimumbreaking strength and mass of rope is given in Appendix C.Information on the designation of rope constructions is given in

Appendix D.

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

2 Definitions

For the purposes of BS 302 the following definitionsapply.

2.1wire

a single continuous length of steel, cold drawn fromrod

2.2strand

an assembly of wires spun helically in one or morelayers around a core

2.3rope

an assembly of strands spun helically, in one ormore layers around a core

2.4rope group

a grouping of ropes of similar characteristics on thebasis of the number of strands in the rope, thenumber of outer wires in the strand and the shapeof the strands

2.5bright wire

non-zinc coated wire, sometimes known as blackwire

2.6

zinc coated wire

wire which has been zinc coated (galvanized) by oneof the permissible processes

2.7king wire

a single wire forming the core of a strand

2.8core

the central member of a strand or rope

2.9core of a round strand

a core which consists of fibre or a single wire (kingwire)

2.10core of a triangular strand

a core which consists of a solid triangular wire, threeround wires formed into a triangle, or a built-up core(BUC)

2.11built-up core (BUC) of a triangular strand

a core which consists of more than three roundwires, formed into a triangle, which are spun andnot laid parallel

2.12main core

the core of the rope around which the strands are

spun. A fibre core is designated FC2.13independent wire rope core (IWRC)

a main core which is itself a wire rope

2.14wire strand core (WSC)

a main core which is itself an independent wirestrand, normally of the same construction as theouter strands

2.15tensile grade (of wire)

the minimum value of tensile strength used todesignate the tensile strength range of the wire Theunit of measure is N/mm2 (1 N/mm2 = 1 MPa)

2.16minimum breaking force

the force, in kilonewtons, below which the rope shallnot break when tested to destruction according toAppendix B

2.17minimum breaking load

the load, in tonnes, corresponding to the minimumbreaking force

2.18calculated aggregate breaking load

the value calculated from the product of the sum ofthe cross-sectional metallic areas of all theindividual wires in the rope and the tensile grade(s)of the wire. The total metallic area is directlyproportional to the square of the nominal diameterof the rope

NOTE This calculated aggregate breaking load is available toassist designers in making a comparison between BritishStandards and certain other current standards in Europe. It isemphasized that the basis of acceptance of rope in accordancewith British Standards is the minimum breaking load.

8/3/2019 302.1

6/16

BS 302-1:1987

2 BSI 01-1999

2.19filler wires

small auxiliary wires in a strand for spacing andpositioning other wires

2.20stranding

spinning wires together to form a strand

2.21round strand rope

a stranded rope in which the strands are made ofwires disposed in such a manner that theperpendicular cross section of the strand isapproximately circular in shape

2.22triangular strand rope (TS)

a stranded rope in which the strands are made ofwires disposed in such a manner that theperpendicular cross section of the strand isapproximately triangular in shape

2.23multi-strand rope

a stranded rope in which two or more layers ofstrand are spun helically around the main core. Thelayers of strands are so disposed that, when undertension, the rope will have the minimum obtainable

torque or rotational tendency. Sometimes known asnon-rotating or rotation resistant

2.24lay

the designation of the direction in which the wiresare spun in the strand and the strands are spun inthe rope. It will be either right-hand (RH)or left-hand (LH)

2.25lay length

that distance in a strand or rope, measured parallelto the longitudinal axis, in which the wire in thestrand or the strand in the rope makes one completeturn (or helix) about the axis of the strand or rope

2.26ordinary lay construction

a rope construction in which the direction of lay ofthe wires in the strands is opposite to the directionof lay of the strands in the rope. Otherwise known asregular lay

2.27langs lay construction

a rope construction in which the direction of lay of

the outer layer of wires in the strands is the same asthe direction of lay of the strands in the rope

2.28equal lay construction

a rope construction in which the wires in the strandare so spun that they all have an equal lay length. Itfollows that the contact between all wires in thestrand is linear

2.29cross lay construction

a rope construction in which the wires in successivelayers of the strand are spun at approximately thesame lay angle. It follows that the wires insuccessive layers in the strand make point contact

2.30preforming

forming the finished strands into the helical shapethey will assume in the finished rope thus lyingnaturally in their true position without constraint

2.31eye

a loop formed and secured at the end of a rope

2.32nominal diameter

the value by which the diameter of the wire or ropeis designated

2.33actual diameter

the measured diameter of the wire or rope

2.34kinking

the tightening of a loop resulting in the permanentdistortion of the wires and strands

2.35tread diameter

the diameter of the sheave measured at the bottomof the groove

3 Material3.1 Wire

Wire used for ropes shall comply with sections oneand two (general purpose wire) or sections one andthree (high duty wire) of BS 2763:1982 as specifiedin the Parts of BS 302 relating to the particulartypes of stranded steel wire ropes.

3.2 Fibre cores

3.2.1 Fibre cores shall be of natural or man-madefibre. Where a fibre core of 4 mm diameter and overis used it shall comply with BS 525.

3.2.2 Ropes having man-made fibre cores shall notbe subjected to any end fitting process whichinvolves temperatures that melt the fibre.

8/3/2019 302.1

7/16

BS 302-1:1987

BSI 01-1999 3

3.3 Lubricant

The lubricant shall be free from acid or significant

alkali content and shall have no injurious effect onthe steel wires or on the fibre content of the cores.

4 Manufacture

4.1 Strand

4.1.1 The strand shall be uniformly made and befree from slack wires and other defects.

4.1.2 In an equal lay construction all wires of thestrand shall be stranded in one operation unless theking wire of a strand is so large as to be consideredundesirable; then, at the manufacturers discretion,it shall be replaced by a multi-wire strand

manufactured in a separate stranding operation.

4.1.3 King wires shall be large enough to enable thecovering wires to be evenly laid.

4.2 Rope

4.2.1 The rope shall be uniformly made, free fromdefects, and the strands shall lie tightly on the coreor the under-lying strands. When uncoiled under noload the rope shall not be wavy.

4.2.2All strands except those of multi-strand ropesshall be of the same construction and direction oflay.

4.2.3 The core shall be large enough to enable thecovering strands to be evenly laid.

4.2.4 In zinc coated ropes, all the wires shall be zinccoated, including those of the steel core.

4.3 Preforming

All ropes except those of multi-strand constructionshall be either preformed or unpreformed.

NOTE 1 If a non-preformed rope is required this should bestated on the enquiry and/or order.

NOTE 2 Multi-strand ropes are not preformed.

4.4 Joints

Except for lift ropes (see BS 302-4), wires

exceeding 0.40 mm diameter shall be joined bywelding or brazing.

5 Diameter and ovality of rope

5.1 Tolerances on diameter

Except for lift ropes (see BS 302-4), when measuredin accordance with Appendix A, the actual diametershall be equal to the nominal diameter within thetolerance given in Table 1.

For ropes with diameters from 2 mm to 5 mm thepermitted tolerance shall be rounded up to thenearest 0.05 mm.

Table 1 Rope diameter tolerances

5.2 Tolerances on ovality

Except for lift ropes (see BS 302-4), the maximumvariation between any of the four measurementstaken in accordance with Appendix A shall notexceed the values given in Table 2.

Table 2 Ovality tolerance

6 Length of rope

The length of a rope, measured under no load andexpressed in metres, shall be the specified length,subject to the following tolerances:

NOTE 1 The length of a rope should be specified by thepurchaser on the order to the manufacturer.

NOTE 2 Ropes required with smaller tolerance, for examplethose fitted with a termination at each end, will be the subject ofspecial agreement between purchaser and manufacturer.Measurement is taken from bearing point to bearing point.

Nominal

diameterd

Rope construction

All constructionsexcept 6 12, 6 24

Paragon

6 12, 6 24Paragon

mm % ofd % ofd

2 and 3

4 and 5

6 and 7

8 and over

Nominaldiameter

d

Rope construction

All constructionsexcept 6 12, 6 24

Paragon

6 12, 6 24Paragon

mm % ofd % ofd

2 and 3 7 9

4 and 5 6 8

6 and 7 5 7

8 and over 4 6

Up to and including400 m

+ 5 % 0

Over 400 m +20 m for each 1 000 m or

0 part thereof

+ 7 1

+ 8 1

+ 6 1

+ 81

+ 51

+ 71

+ 41

+ 6 1

8/3/2019 302.1

8/16

BS 302-1:1987

4 BSI 01-1999

7 Inspection and testing

7.1 Facilities for inspection

All tests and inspections shall be made beforedespatch.

NOTE 1 The rope manufacturer should ensure that such testsand inspections are made.

NOTE 2 When so specified by the purchaser on the enquiry andorder, the rope manufacturer should accord the purchaser or hisrepresentative all reasonable facilities to carry out tests in orderto ensure that the rope is in accordance with this standard.

Where the purchaser is not satisfied with the tests,the manufacturer is at liberty to have the ropestested in accordance with the provisions of thisstandard by an independent testing authorityagreed upon between the purchaser and the

manufacturer. If the results of such tests aresatisfactory, the ropes are deemed to comply withthis standard.

7.2 Test on rope for actual breaking load

A tensile test to destruction shall be carried out inaccordance with Appendix B on a test piece fromeach rope-making (production length).

The actual breaking load shall be not less than theminimum breaking load specified in the Parts ofBS 302 relating to the particular types of strandedsteel wire ropes and shall be recorded by themanufacturer.

NOTE 1 C.1 gives the method of calculation.

NOTE 2 Tests in which breakage occurs adjacent to the gripsmay be discarded at the option of the manufacturer.

7.3 Tests on wire from the rope

7.3.1 General. When tests on wires taken from thecompleted rope are specified by the purchaser in theenquiry and order, see Appendix F, the followingtests shall be carried out on all ropes in accordancewith Appendix E:

a) diameter measurement;

b) tensile tests;

c) torsion test;

d) when applicable, zinc coating weight test.

NOTE 1 In the case of ropes for mine hoisting (see BS 302-6) areverse bend test should be carried out in addition to tests a)to d). In the case of ropes for hauling purposes (see BS 302-5)a reverse bend test may be required in addition to tests a) to d).

Not more than one wire in a sample shall fail eachof the requirements in 7.3.2 to 7.3.6.NOTE 2 This requirement may be alternatively stated asshown in the adjunct to Table 10.

7.3.2 Wire diameter. The wire diameters shall bewithin the tolerances given in Table 3.

Table 3 Tolerances on nominal diameterof rope wire

7.3.3 Tensile strength. The tensile strength shall benot more than 50 N/mm21) below the nominaltensile strength, except that a 5 % reduction shall bepermitted for wires taken from triangular strand

ropes.

Nominaldiameter of

wirea

Bright or drawnzinc coated (class

A or class Z)

Finally zinc coated(class A)

Fromincl.

Toexcl.

Plus Minus Plus Minus

mm mm mm mm mm mm

0.20

0.25

0.40

0.25

0.40

1.00

0.01

0.01

0.015

0.005

0.01

0.015

1.001.60

2.40

3.70

1.602.40

3.70

5.00

0.020.025

0.03

0.04

0.020.025

0.03

0.04

0.040.05

0.06

0.08

0.020.03

0.03

0.04

a High duty wire only available in sizes 0.80 mm to 4.10 mm,

bright or drawn zinc coated (class Z), section three of

BS 2763:1982

1) N/mm2 = 1 MPa.

8/3/2019 302.1

9/16

BS 302-1:1987

BSI 01-1999 5

Table 4 Minimum number of twists for general purpose wire

7.3.4 Torsions. When tested on alength 100 diameter of wire, the number oftorsions without failure shall be equal to or greaterthan those given in Table 4 and Table 5.

Table 5 Minimum number of twists for highduty wire: bright or drawn zinc

coated class Z

Nominal

diameter of wire

Bright or grade Z zinc coated wire Drawn zinc coated

wire (class A)

Finally zinc coated

(class A)

Fromincl.

To excl. Tensile grade

1 370N/mm2

1 420N/mm2

1 570N/mm2

1 770N/mm2

1 420N/mm2

1 570N/mm2

1 770N/mm2

1 420N/mm2

1 570N/mm2

mm mm

0.50

1.00

1.30

1.80

1.00

1.30

1.80

2.30

24

23

23

23

23

23

23

22

23

23

23

22

21

20

20

19

21

21

21

20

21

21

21

20

19

18

17

14

14

2.30

3.003.50

3.80

3.00

3.503.80

4.00

22

2120

19

21

2020

18

21

2020

18

17

1716

15

20

20

12

11

12

11

4.00

4.20

4.40

4.60

4.20

4.40

4.60

4.80

19

18

18

17

17

17

17

16

17

17

17

16

14

14

13

11

NOTE These values represent 75 % of the values in BS 2763.

Nominal diameter ofwire

Tensile grade

From incl. To excl. 1 570 N/mm2 1 770 N/mm2

mm mm

0.80

1.00

1.30

1.80

1.00

1.30

1.80

2.30

26

26

25

23

25

23

23

21

2.30

3.00

3.50

3.80

3.00

3.50

3.80

4.10

23

22

21

20

20

18

17

16

NOTE These values represent 75 % of the values in BS 2763.

8/3/2019 302.1

10/16

BS 302-1:1987

6 BSI 01-1999

7.3.5 Reverse bends (applicable to rope in BS 302-5and BS 302-6 only). The number of reverse bends

shall be equal to or greater than those given inTable 6.

Table 6 Reverse bends

7.3.6 Zinc coating. The weight of zinc coating shallbe not less than that given in Table 7.

Table 7 Minimum weight of zinc: generalpurpose and high duty wire

7.3.7 Failure to comply on first testing. If more thanone wire fails any one test, all the wires of thatnominal diameter shall be tested. These retestsshall be restricted to the particular test in whichfailure occurred.

The number of wires which fail on retest shall be notgreater than 4 % of the total number of wires of

equal nominal diameter in the rope.

8 Certificates

8.1 Ropes for use within the jurisdiction of theHealth and Safety at Work etc. Act 1974

A certificate of compliance2) shall be supplied witheach consignment of rope, and it shall include astatement that it complies with this standard.

Nominaldiameterof wire

Bendradius

Minimum number of reverse bendsfor stated tensile grade

Bright wire or drawn zinc coatedclass Z wire general purpose and

high duty wire

1 570N/mm2 1 770N/mm2

mm mm

0.900.95

1.00

2.598

8

88

7

1.101.201.301.401.50

3.75

13121198

121110

87

1.601.701.801.902.00

5.0

1110987

109876

2.102.202.302.402.502.602.702.802.903.00

7.5

12111110988776

111110

9887655

3.10

3.203.303.403.503.603.703.803.904.00

10.0

10

988776655

9

887665555

NOTE For intermediate nominal diameters or tensilestrength grades, the bend radius and minimum number ofbends shall be those given for the next larger nominal diameteror tensile grade. These values represent approximately 75 % ofthe values in BS 2763.

Nominal diameter ofzinc coated wire

Minimum weight

Fromincl.

To excl. Class Z Class A

mm mm g/m2 g/m2

0.20

0.25

0.33

0.40

0.50

0.60

0.80

1.00

1.20

1.50

1.90

2.50

3.20

3.70

4.25

0.25

0.33

0.40

0.50

0.60

0.80

1.00

1.20

1.50

1.90

2.50

3.20

3.704.25

5.00

18

27

27

36

45

54

63

72

81

90

99

112

121121

135

27

40

54

67

81

99

117

135

148

162

184

207

225234

247

NOTE These values represent 90 % of the values in BS 2763.

2) Form 87: Certification of tests and examination of wire rope.

8/3/2019 302.1

11/16

BS 302-1:1987

BSI 01-1999 7

8.2 Ropes for use outside the jurisdiction ofthe Health and Safety at Work etc. Act 1974

If a certificate of test is supplied it shall give at leastthe following information and shall be supplied witheach consignment of rope.

a) The number of this British Standard,i.e. BS 3023) and the relevant Part number andyear.

b) Length of rope.

c) Size of rope.

d) Details of construction.

e) Minimum breaking load of rope.

NOTE The purchaser should state on the enquiry and orderwhether a certificate of test is required (see Appendix F).

9 Identification

The test certificate number, the rope size and

construction, the number of this British Standardand the relevant Part number and year shall belegibly and durably marked upon a tag securelyattached to each coil or reel.

10 Packing

Ropes in accordance with BS 302-5 and BS 302-6and multi-strand ropes shall be supplied on reels;other ropes shall be supplied in coils or on reels. Theropes shall be protected in transit against damageby moisture, dust or dirt.

NOTE If the purchaser requires a particular packing, this

should be stated on the enquiry and order (see Appendix F).

3) Marking BS 302 on or in relation to a product is a claim by the manufacturer that the product has been manufactured in

accordance with the requirements of the standard. The accuracy of such a claim is therefore solely the manufacturers

responsibility. Enquiries as to the availability of third party certification should be addressed to the appropriate certification

body.

8/3/2019 302.1

12/16

BS 302-1:1987

8 BSI 01-1999

Appendix A Method of measuringdiameter

A.1 Apparatus

A.1.1 Caliper, fitted with jaws broad enough tocover not less than two adjacent strands(see Figure 1).

A.2 Procedure

Take measurements on a straight portion of ropeunder no tension, at two points spaced at least 1 m

apart. At each point measure two diameters atright-angles.

Take the average of these measurements as theactual diameter.

NOTE In case of dispute the diameter may be measured undera force of 5 % of the minimum breaking load of the rope.

Appendix B Method of measuringactual breaking load

B.1 Apparatus

B.1.1 Tensile testing machine, having an accuracycomplying with grade 1.0 of BS 1610.

B.2 Test pieceTake a test piece that is representative of the ropeand of a length such that the minimum test length(distance between the grips) is in accordance withTable 8.

B.3 Procedure

Apply no more than four-fifths of the minimumbreaking force quickly and thereafter apply furtherforce slowly and steadily until the actual breakingload is attained. Record the value.

Table 8 Test length

Appendix C Determination ofminimum breaking force and mass ofrope

C.1 Determination of minimum breaking force

The minimum breaking force. Fo, in kN, is

calculated using the following equation:

where

The values of are given in Table 9.

is the factor for fibre cored ropes; and

is the factor for steel cored ropes.

The minimum breaking load (MBL), in t, in thetables is calculated using the following equation:

MBL = F0 0.102

where

C.2 Determination of mass

The approximate rope mass per unit length of therope, M, in kg/100 m, is calculated using thefollowing formula:

M=Kd2

where

Values forKare given in Table 9. These values arefor fully lubricated ropes; ropes which are not fullylubricated may be lighter.

Figure 1 Method of measuring ropediameter

Nominal diameter d Minimum test length

mm mm

Under 6

6 to 20

Over 20

300

600

30d

d is the nominal diameter of the rope (in mm);

R0 is the tensile grade of wire (in N/mm2);

is the empirical factor for the minimumbreaking force for a given rope construction.

F0 is the minimum breaking force (in kN).

d is the nominal diameter of the rope(in mm);

K is the empirical factor for the mass perunit length for a given rope construction.

K1n is the factor for natural fibre cored ropes;

K1p is the factor for polypropylene fibrecored ropes; and

K2 is the factor for steel cored ropes.

F0K9d

2R0

1 000--------------------=

9k

K9

K91

K92

8/3/2019 302.1

13/16

BS 302-1:1987

BSI 01-1999 9

Appendix D Designation of theconstruction

A convention has been adopted nationally fordescribing various rope constructions,e.g. 6 36 (14/7 and 7/7/1)FC. This exampledescribes a rope having six strands and a fibre core,each strand comprising 36 wires with the outerlayer having 14 wires, the second layer seven largeand seven smaller wires, the inner layer sevenwires round one king wire.

The constructions are also known by name,e.g. Warrington-Seale. For a fuller explanation ofthe names see BS 6570.

Appendix E Method of testing wirestaken from the completed rope

E.1 Test pieces

Cut a suitable length from the rope and unlay it intoits component wires. Segregate the wires of eachnominal diameter excluding filler wires, king wires,wire of a triangular strand core and wire of a steelcore.

Take a random sample of test wires of each of thenominal diameters to be tested, the number of wiresin a sample being in accordance with Table 10.

Straighten each test piece in a manner thatminimizes surface damage and strain.

E.2 Test and retest procedureCarry out the tests in accordance with BS 2763.

Table 9 Values for factorsKandK9

Rope group Rope mass factor Minimum breakingforce factor

Naturalfibre core

K1n

Man-madefibre core

K1p

Steel core

K2

Fibre core Steelcore

kg/100 m per mm2

a 6 7 0.346 0.340 0.381 1.10 1.12 0.332 0.359 1.08

a

a

6 19

6 36Equal lay

0.361 0.352 0.398 1.10 1.13 0.330 0.356 1.08

b

6 196 37

Cross lay0.3460.346

0.3370.337

0.381

1.10

1.13

0.3070.295

0.332

1.08

b 6 12 0.251 0.231 0.209

a 6 24 0.308 0.295 0.280

c 12 6/3 24 0.362 0.300

a

a

17 718 7

0.390 0.328

a

a

34 736 7

0.390 0.318

a

a8 198 26

0.347 0.339 0.293

c

c

c

6 8TS6 22TS

6 25TS

0.410

0.410

0.400

0.400

0.447

0.447

1.09

1.09

1.12

1.12

0.362

0.351

0.384

0.372

1.06

1.06

a In accordance with ISO 2408:1985.b In accordance with ISO 2408:1973.c Not included in ISO standards.

K2K1n----------

K2K1p----------

K92

K91---------

K91 K92

8/3/2019 302.1

14/16

BS 302-1:1987

10 BSI 01-1999

Table 10 Number of wires in a sample Appendix F Information to be suppliedby the purchaser on enquiry and order

If the purchaser is uncertain about any of theparticulars called for below, reference should bemade to the rope manufacturer, giving details of theuse to which the rope will be put.

The particulars required are as follows:

a) number of this British Standard, (i.e. BS 302)and the relevant Part number and year;

b) purpose for which the rope is to be used;

c) length;

d) diameter;

e) construction (group);

f) core type;

g) wire tensile and wire finish (bright or zinccoated) as appropriate;

h) ordinary or Langs lay, and lay direction whereappropriate;

i) testing to be undertaken;

j) the type of certificate required (see clause 8);

k) any specific requirements, e.g. detrimentalenvironmental conditions, length tolerancesrequired if tighter than those provided inclause 6.

Number of wires of given

nominal diameter in rope

Number of test wires in a

sample of one nominal wirediameter

Up to 50 wires

51 to 90 wires

91 to 150 wires

8

13

20

Adjunct to table 10a. Failure criteria

Number of rejections

Conformity Non- conformity

11

1

22

2a See note 2 to 7.3.1.

8/3/2019 302.1

15/16

BS 302-1:1987

BSI 01-1999

Publications referred to

BS 525, Fibre cores for wire ropes.

BS 1610, Materials testing machines and force verification equipment.

BS 1610-1, Specification for the grading of the forces applied by materials testing machines.BS 2763, Specification for round carbon steel wire for wire ropes.

BS 5750, Quality systems4).

BS 5750-2, Specification for manufacture and installation.

BS 6570, Code of practice for the selection, care and maintenance of steel wire ropes4).

ISO 2408, Steel wire ropes for general purposes Characteristics4).

ISO 4344, Steel wire ropes for lifts4).

4) Referred to in the foreword only.

8/3/2019 302.1

16/16

BSI

389 Chiswick High Road

LondonW4 4AL

|||||||||||||||||||||||||||||||||||||||||||

|||||||||||||||||||||||||

|||||||||||||||||||||||||

||||||||||||||||||||||||||||||||||

BSI British Standards Institution

BSI is the independent national body responsible for preparing British Standards. Itpresents the UK view on standards in Europe and at the international level. It is

incorporated by Royal Charter.

Revisions

British Standards are updated by amendment or revision. Users of British Standardsshould make sure that they possess the latest amendments or editions.

It is the constant aim of BSI to improve the quality of our products and services. Wewould be grateful if anyone finding an inaccuracy or ambiguity while using thisBritish Standard would inform the Secretary of the technical committee responsible,the identity of which can be found on the inside front cover. Tel: 020 8996 9000.Fax: 020 8996 7400.

BSI offers members an individual updating service called PLUS which ensures thatsubscribers automatically receive the latest editions of standards.

Buying standards

Orders for all BSI, international and foreign standards publications should beaddressed to Customer Services. Tel: 020 8996 9001. Fax: 020 8996 7001.

In response to orders for international standards, it is BSI policy to supply the BSIimplementation of those that have been published as British Standards, unlessotherwise requested.

Information on standards

BSI provides a wide range of information on national, European and internationalstandards through its Library and its Technical Help to Exporters Service. VariousBSI electronic information services are also available which give details on all its

products and services. Contact the Information Centre. Tel: 020 8996 7111.

Fax: 020 8996 7048.Subscribing members of BSI are kept up to date with standards developments andreceive substantial discounts on the purchase price of standards. For details ofthese and other benefits contact Membership Administration. Tel: 020 8996 7002.Fax: 020 8996 7001.

Copyright

Copyright subsists in all BSI publications. BSI also holds the copyright, in the UK, ofthe publications of the international standardization bodies. Except as permittedunder the Copyright, Designs and Patents Act 1988 no extract may be reproduced,stored in a retrieval system or transmitted in any form or by any means electronic,

photocopying, recording or otherwise without prior written permission from BSI.

This does not preclude the free use, in the course of implementing the standard, ofnecessary details such as symbols, and size, type or grade designations. If thesedetails are to be used for any other purpose than implementation then the priorwritten permission of BSI must be obtained.

If permission is granted, the terms may include royalty payments or a licensingagreement. Details and advice can be obtained from the Copyright Manager.Tel: 020 8996 7070.