Government Cordage Test Methods

FED. TEST METHOD STD. NO. 191AJuly 20, 1978SUPERSEDINGFed. Test Method. No. 191December 31, 1968

FEDERAL STANDARD

FOR

TEXTILE TEST METHODS

This standard was approved by theCommissioner, Federal Supply Service,General Services Administration, forthe use of all Federal agencies.

U.S. GOVERNMENT PRINTING OFFICE : 1978 - 261-423/1108

Orders for this publication are to be placed with General Services Ministration,acting as an agent for the Superintendent of Documents. Single copies of thisstandard are available, without charge at the GSA Business Service Centers inBoston, New York, Philadelphia, Atlanta, Chicago, Kansas City, MO, Fort Worth,Houston, Denver, San Francisco, Los Angeles, and Seattle, WA. Additional copiesmay be purchased for 11.25 from the General Services Administration, Specifica-tions Activity, printed Materials Supply Division, Building 197, Naval WeaponsPlant, Washington, DC 20407.

FSC 83GP

INFORMATION SHEET

ON

FEDERAL TEST METHOD STANDARDS

This Federal Test Method Standard is issued in looseleaf form to permit theinsertion or removal of new or revised sections and test methods.

All users of Federal Test Method Standards should keep them up to date byinserting revised or new test methods as issued, and removing superseded andcancelled pages.

New and revised material and cancellations will be issued under ChangeNotices which will be numbered consecutively and will bear the date of issuance.Change Notices should be retained and filed in front of the Alphabetical Indexof the Standard until such time as they are superseded by a reissue of theentire Standard.

FED. TEST METHOD STD. NO. 191AJuly 20, 1978

FEDERAL TEST METHOD STANDARD

TEXTILE TEST METHODS

AUTHORITY . This standard is issued pursuant to the Federal Property andAdministrative Service Act of 1949, as ammended, and its application to thepurchase of commodities referred to herein is mandatory on all Federal agencies.

SECTION 1 - SCOPE AND CONTENTS

1.1 Scope. This standard describes the general physical, chemical andbiological methods for testing textile fibers, yarn, thread, rope, othercordage, cloth and fabricated textile products for conformance with the require-ments of Federal and Military Specifications. It does not include certainmethods which are described in the specifications for the materials to whichthey apply. This standard was prepared in order to eliminate unnecessary orundesirable variations in the general procedures. In the event that conflictshould occur between the requirements of this standard and those contained in aspecification or other type of procurement document on date of invitation forbid, the procurement document or specification shall govern.

1.2 Contents. The contents of this standard are as follows:

Section 1.

Section 2.

Section 3.

Section 4.

Section 5.

Section 6.

Section 7.

Section 8.

Section 9.

Section 10.

Scope and Contents

Definitions

Sampling and Number of Specimens

Atmospheric Conditions for Testing

General Notes

Numerical Index of Test Methods

Alphabetical Index of Test Methods

Conversion Equivalents

Test Methods

Supersession Data, Source Information, and Interested Agencies.


SECTION 2 - DEFINITIONS

2.1 Scope. For the purpose of this Standard and all procurement documentsreferring hereto, the following definitions shall apply:

2.2 General Definitions.

2.2.1 Acceptance of a lot. The approval of a lot conforming to contract orspecification requirements.

2.2.2 Rejection of a lot. The disapproval of a lot as not conforming to thecontract or specification requirements.

2.2.3 Standard sample. A standard sample is a sample of material selectedor designated by the Government to meet material requirements and furnished bythe Government for testing purposes. The standard sample is used in evaluatingthe quality of the test specimen for specific characteristics or properties bydirect comparison of the test specimen and standard sample under identicalconditions. Its purpose is to render a definite description of one or moreproperties being evaluated.

2.2.4 Test method. A test method is a detailed description of the requiredway for conducting a test; it is the act of evaluating or determining a requiredproperty or characteristic of a single sample unit by taking one or more measurementaccording to prescribed procedure.

2.2.5 Test result. A test result is the recorded measurement of a requiredproperty or characteristic for a single sample unit when such measurement iscarried out in conformance with prescribed procedure.

2.3 Definitions applicable to sampling.

2.3.1 Random sampling. Random sampling is the procedure used to select itemsfrom the inspection lot so that each item in the lot has an equal chance of beingincluded in the sample. There are many ways of drawing a random sample, perhapsthe best one is the use of a table of random numbers. Such a table facilitatesthe selection of a valid random sample representative of the lot.

2.3.2 Sample. A sample consists of one or more units of a product drawn froma lot, the units being selected at random without regard for quality.

2.3.3 Sample size. The sample size is the number of units of a product inthe sample selected for inspection.

2.3.4 Sample for test. A specified number of sample units (units of aproduct) taken from a lot for the purpose of testing for all physical and chemicalproperties for which requirements are specified.

FED. TEST METHOD STD. NO. 191A

2.3.5 Sample unit (for test purposes). The sample unit is the total quantityof material necessary to obtain one test result for each of the properties andcharacteristics specified in the procurement document. In testing of smallpackage units, the sample unit may be a package unit randomly selected from thematerial representing the lot. In testing commodities in which the units areindividually too small to provide sufficient material for evaluating all theproperties specified in the procurement document, the sample unit may be asufficient number of units of the material, taken as an aggregate, to providethe quantity of material required.


SECTION 3 - SAMPLING AND NUMBER OF SPECIMENS

3.1 Sampling. The material to be tested shall be sampled as required inthe applicable procurement document.

3.2 Number of specimens. The number of specimens to be tested for eachproperty and each sample unit shall be as required by the test method unlessspecifically excepted in the procurement document.


SECTION 4 - ATMOSPHERIC CONDITIONS FOR TESTING

4.1 Humidity and temperature conditions for testing. Unless otherwisespecified in the applicable test method or procurement document, physicaltests of textiles and textile products shall be performed under standardatmospheric conditions and performed on specimens in moisture equilibriumunder standard atmospheric conditions.

4.1.1 Standard atmospheric conditions. Standard atmospheric conditionsfor textiles and textile products testing are 65 percent ± 2 percent relativehumidity at a temperature of 70°F ±2°F (21°C ± 1°C).

4.1.2 Moisture equilibrium. Moisture equilibrium is considered to havebeen reached when, after free exposure of the material to air in motion,controlled at standard atmospheric conditions as defined above, and changein weight in successive weighings made at intervals of one hour is no greaterthan 0.25 percent.

4.2 Preconditioning. In the event of dispute concerning the results oftests that may be affected by the moisture content, the material shall bepreconditioned by being brought to moisture equilibrium with an atmospherehaving a relative humidity of not over 10 percent and a temperature not over.25°F (52°C). The material shall then be brought to moisture equilibriumunder standard atmospheric conditions as defined above and then tested.


SECTION 5 - GENERAL NOTES

5.1 Content of Methods.

5.1.1 Principal subdivisions. The methods are organized under the followingheadings: 1. Scope, 2. Test Specimen, 3. Number of Determinations, 4. Apparatus,Reagents and Method Cited, 5. Procedure, 6. Report and 7. Notes.

5.1.1.1 Scope. A statement of what the test method is intended to do, theproperty to be measured or evaluated, the material to which the method isapplicable, and the limitations of the method.

5.1.1.2 Test specimen. This specifies that portion of a sample unit, itsdimensions, and the way in which it is to be taken for a single measurement ofa given property or characteristic, and any special preparation the specimenmay require.

5.1.1.3 Number of determinations. A statement of the number of test specimensrequired from each sample unit to be tested.

5.1.1.4 Apparatus, reagents and method(s) cited. A description of the apparatusand reagents required to carry out the test and any other test method(s) formingan integral part of the overall procedure.

5.1.1.5 Procedure. Description of the step-by-step directions for carryingout the test.

5.1.1.5.1 Calculation of results. Description of the techniques required toinsure that the required end result of the characteristic being tested is reached.

5.1.1.6 Report. Specific instructions for expressing the results to insureuniformity of expression and recording of the results.

5.1.1.7 Notes. Additional, but not mandatory information (eg. addresses ofcompanies supplying specific apparatus and equipment) which may be used in theperformance of a specific test method.

5.2 Significance of Dimensional Statements in Methods.

5.2.1 Forms used. Numerical requirements are given in any of three formsillustrated by the following examples: “approximately 2 grams”, “2 grams” and“2.000 ± 0.002 grams”.

5.2.1.1 Approximately 2 grams”. This form of expression implies that thenumerical requirement is not critical and may vary within reason. The permissablevariation is usually dictated by obvious practical considerations and the nearestreadily obtained approximation to the weight and dimensions may be consideredsatisfactory.

FED. TEST METHOD STD. NO. 191.A

5.2.1.2 “2 grams”. This form of expression implies that the numericalrequirement is to be as close to “2 grams” as can be readily measured on thestated material with the usual, ordinary engineering tools.

5.2.1.3 “2.000 ± 0.002 grams”. This form of expression implies that the

numerical requirement in question must be between 1.998 and 2.002 grams.

5.3 Supplemental Documents.

5.3.1 The Department of Defense has issued two documents supplementing theprovisions of this Standard which are intended to further the achievement ofstandardization of testing techniques and improve obtainment of comparabilityof test results between Laboratories. These documents are Military Handbook737, Handbook for Textile Laboratory Personnel, and Military Standard 1157,Calibration and Calibration Verification Procedures for Textile Test Methods.Copies of the Handbook and Standard may be obtained by addressing the procurementactivity issuing the invitation for bids.

5.4 Activities outside the Federal Government may obtain copies of FederalSpecifications, Standards, and Handbooks as outlined under General Informationin the Index of Federal Specifications and Standards and at the prices indicatedin the Index. The Index, which includes cumulative monthly supplements asissued, is for sale on a subscription basis by the Superintendent of Documents,U.S. Government Printing Office, Washington, DC 20402.

5.5 Single copies of this standard and other product specifications requiredby activities outside the Federal Government for bidding purposes are availablewithout charge from Business Service Centers, at the General Services AdministrationRegional Offices in Boston, New York, Washington, DC, Atlanta, Chicago, KansasCity, MO, Fort Worth, Denver, San Francisco, Los Angeles and Seattle, WA.

5.6 Federal Government activities may obtain copies of Federal Specifications,Standards and Handbooks and the Index of Federal Specifications and Standardsfrom established distribution points In their agencies.


METHOD NO.

11001200124014001410150015101520153015341540155016001700

2011201220132015

2016

20202050205120532060

210021012102211021112510251125302535

SECTION 6 - NUMERICAL INDEX OF TEST METHODS

TITLE

Identification - Qualitative Analysis

Identification ofIdentification ofIdentification ofIdentification ofIdentification ofIdentification ofIdentification ofIdentification ofIdentification of

Wool, Mohair, Alpaca and SilkCotton, Flax, Hemp, Ramie and JuteManila (Abaca’), Sisal and CoirAsbestosGlassRayon, ViscoseRayon, AcetateRayon, CuprammoniumNylon

Melting Point of Synthetic FibersIdentification of Vinylidene Chloride FibersIdentification of Vinyl Chloride-Acetate Copolymer FibersIdentification of Synthetic Fibers by Generic ClassIdentification of Dyes on Animal Fibers

Quantitative Analysis

Dihydroxydichlorodiphenyl Methane Content, Calorimetric MethodDihydroxydichlorodiphenyl Methane Content, Parr Chloride MethodFluorine Content of Textile MaterialsSodium Salt of 5-Chloro -2- [4 Chloro -2- [3- (3,4 Dichloro-phenyl) -Ureido] -Phenoxy] Benzenesulfonate ContentSodium Salt of [(4, 5-Dichloro, 2-Chloromethane Sulfonamide)3’, 4’, 6’, Trichloro] Diphenyl Ether Content

Presence of Labile Sulfur in Textile MaterialsCopper Content of Textiles, Electrolytic MethodCopper Content of Textiles, Polarographic MethodSmall Amounts of Copper and Manganese in TextilesCopper-8-Quinolinolate Content of Textiles, Spectrophoto-metric MethodWool Content, Acid MethodWool Content, Alkali MethodWool Content, Hypochlorite MethodSilk Content of Fiber MixturesSilk Fiber Content of Silk Textiles (Especially Weighted Silk)Cellulose Acetate Content of Fiber Mixtures, Acetic Acid MethodCellulose Acetate Content of Fiber Mixtures, Acetone MethodNylon Content of Fiber MixturesPolyester Content of Fiber Mixtures

260026012610261126202800281028112820

3810

401040214050405240544100

41044108

411041124308

45004502

45044800

4804

48304832

50105020503050405041

505050525060

Numerical Index (cont’d)

Moisture Content, Oven MethodMoisture Content, Oven-Balance MethodNonfibrous Materials in Cotton, Acid MethodNonfibrous Materials in Cotton, Enzyme MethodNonfibrous Materials in Linen TextilesWool Fiber Damage, Alkali Volubility MethodAcidity (pH) of Textiles, Calorimetric MethodpH of Textiles, Electrometric MethodChitin Content of Textiles, as a Measure of Fungal

Fibers

Becker Value of Cordage Fiber

Yarn, Thread, Cordage

Contamination

Length-Weight Relation; Thread; Yards Per Pound (m/kg)Yarn Number (Linear Density) of Yarn from PackageDirection of Twist: Yarn, Thread, CordageTwist in Single YarnsTwist and Twist Contraction; Ply YarnsStrength and Elongation, Breaking; and Tenacity; of Thread andYarn; Single StrandStrength, Breaking of Thread and Yam; Skein MethodStrength and Elongation, Breaking; Textile Webbing, Tapeand Braided Items

Crimp in Yarns from Cloth; Dead-Load MethodCrimp in Yams from Cloth; Load-Elongation MethodAbrasion Resistance of Yarn, Thread, and Light Cordage;Uniform-Abrasion (Schiefer) Method

Water Absorption, Dynamic; Tumble Jar MethodWater Absorption: Thread, Cord, Braid, Tape, Webbing;Immersion Method

Water Resistance, Vertical Rise Wicking, ThreadWeathering Resistance; Yarn, Cordage; NaturalMethodWeathering Resistance; Yam, Thread, Cordage;Weathering MethodLeaching Resistance; Cordage; Standard MethodLeaching Resistance; Cordage; Prewet Specimen

Fabrics

Length of Textile Materials; Determination ofWidth of Textile Materials; Determination ofThickness of Textile Materials; Determination

Weathering

Accelerated

Method

ofWeight of Cloth; Cut, Roll, or Bolt Method; Determination ofWeight of Textile Materials, Small Specimen Method; Determinationof

Yams Per Unit Length (Inch or Centimeter) in Woven ClothStitches per Unit Length in Seams and Stitchings; Determination ofBow of Yarns in Woven Cloth



507051005102

5104

510651105120512251325134520052025204

5206

5210521252145216

522052305300

53025303

5304

5306

5308

53095310532054005404

5410542054505452

Wales and Courses in Knit ClothStrength and Elongation, Breaking of Woven Cloth; Grab MethodStrength and Elongation, Breaking of Woven Cloth; Cut StripMethodStrength and Elongation, Breaking of Woven Cloth; Ravel StripMethodTension of Elastic Textile MaterialsSewability of Woven Cloth; Seam Efficiency MethodStrength of Cloth; Ball Bursting MethodStrength of Cloth; Diaphragm Bursting MethodStrength of Cloth, Tearing; Falling-Pendulum MethodStrength of Cloth, Tearing; Tongue MethodStiffness of Cloth, Directional; Hanging Heart Loop MethodStiffness of Cloth, Directional; Cantilever Bending MethodStiffness of Cloth, Directional: Self-Weighted CantileverMethodStiffness of Cloth, Drape and Flex; Cantilever BendingMethodCrease Resistance of Cloth; Cold Press Recovery MethodCrease Resistance of Cloth; Angle of Recovery MethodWrinkle Recovery of Fabrics; Appearance MethodDurable Press on Fabrics, Shirts and Trousers: Evaluation of:Cloth Appearance, Seam Appearance, Fly Appearance, CreaseAppearance and Soil Release

Flexibility of Cloth After LeachingFlexing Resistance of Coated ClothAbrasion Resistance of Cloth; Flexing, Folding Bar (Stoll)MethodAbrasion Resistance of Cloth; Inflated Diaphragm (Stoll) MethodColor Change of Cloth Due to Flat Abrasion (Frosting); WireScreen Method

Abrasion Resistance of Cloth; Oscillatory Cylinder (Wyzenbeek)MethodAbrasion Resistance of Cloth; Rotary Platform, Double-Head(Taber) Method

Abrasion Resistance of Cloth; Uniform Abrasion (Schiefer)MethodAbrasion Resistance of Textile WebbingAppearance-Retention of Cloth; pilling and Surface WearPilling Resistance of Textile Fabrics; Brush and Sponge MethodSewability of Woven Cloth; Yarn Severance MethodSewability of Cloths Containing Thermoplastic SyntheticFibers or YarnsSlippage Resistance of Yarns in Cloth; Yarn Distortion MethodSlippage Resistance of Yarns in Cloth; Seam MethodPermeability to Air; Cloth; Calibrated Orifice MethodPermeability to Air; Cloth; Falling Cylinder Method

FED. TEST METHOD STD. NO, 191A

55005502550455065508

5509

5510

5512

5514

5516

5518

55195520552255245526

55285530

5550

55525554555655585580559056005605

5610

5612

5614

5616

Numerical Index

Water Resistance of Cloth;Water Resistance of Cloth;Water Resistance of Coated

(cont’d)

Dynamic Absorption MethodImmersion Absorption MethodCloth; Spray Absorption Method

Dry Cleaning Test, Accelerated: for LabelsDry Cleaning Solvent Resistance of Cloth With Water-ResistantFinish; Tumble Jar Method

Dry Cleaning Solvent Resistance of Cloth With Water-ResistantFinish: Launder-Ometer Method

Dry Cleaning Resistance of Cloth With Water-Resistant Finish;Rotating Wheel Method

Water Resistance of Coated Cloth: High Range, HydrostaticPressure Method

Water Resistance of Cloth; Low Range, Hydrostatic PressureMethodWater Resistance of Cloth; Water Permeability, HydrostaticPressure Method

Laundering Resistance of Cloth With Water-Resistant Finish;Wash Wheel (Wet Mechanical Action) MethodLaundering Test, Accelerated; for LabelsWater Resistance of Cloth; Drop Penetration MethodWater Resistance of Cloth; Water Impact Penetration MethodWater Resistance of Cloth; Rain Penetration MethodWater Resistance of Cloth With Hydrophobic Finish; SprayMethodWater Resistance of Coated Cloth; Spray MethodPenetration Resistance of Cloth To Passage of Feathers and Down;Tumbling MethodShrinkage in Laundering; Cotton, Linen, and Blended Cotton andLinen ClothShrinkage in Laundering; Cloth Other Than Cotton and LinenShrinkage in Laundering; Wool Cloth; Accelerated MethodMobile Laundry Evaluation For Textile MaterialsShrinkage, Relaxation; Wool ClothShrinkage in Dry Cleaning; ClothShrinkage in Sponging; Wool ClothColorfastness of Textile Materials to Chlorine BleachingColorfastness to Combined Laundering and Bleaching of TextileMaterials; Launder-Ometer MethodColorfastness to Laundering of Cotton and Linen Textile Materials;Launder-Ometer MethodColorfastness to Laundering of Cotton and Linen Cloth; WashWheel MethodColorfastness to Laundering of Wool, Silk, Rayon and OtherTextile Materials; Launder-Ometer MethodColorfastness to Laundering of Wool, Silk and Rayon Cloth;Wash Wheel Method



5620

5621

5622

563056325640

56425651

56605662

5671

5672

56755680

5750576057625764580058045830583158325850585158525870587258745900590359045905590659075908

ColorfastnessSolvent

Colorfastnesslene Solvent

ColorfastnessSolvent

ColorfastnessColorfastnessColorfastnessPressing)

Colorfastness

to Dry Cleaning of Textile Materials; Petroleum

to Wet Cleaning of Textile Materials; Perchloroethy-(Associated with Dry Cleaning)to Wet Dry Cleaning of Textile Materials: Petroleum

of Textile Materials to Waterof Textile Materials to Salt Water and Soapof Textile Materials to Dry and Wet Heat (Hot

of Textile Materials to Dry Heat (Sublimation)Crocking of Woven and Knitted Cloth; Standard Sample; MunsellScale Method

Colorfastness to Light of Textile Materials; Accelerated MethodColorfastness to Light of Textile Materials; Natural LightMethodColorfastness of Textile Materials to Weather: AcceleratedWeathering Method

Colorfastness to Weather of Textile Materials; Natural WeatheringMethodColorfastness of Cloth to Oxides of Nitrogen in the AtmosphereColorfastness of Textile Materials to Perspiration; Perspiro-meter Method

Mildew Resistance of Textile Materials; Single Culture MethodMildew Resistance of Textile Materials; Mixed Culture MethodMildew Resistance of Textile Materials; Soil Burial MethodInsect Resistance of Textile MaterialsWeathering Resistance of Cloth; Natural Weathering MethodWeathering Resistance of Cloth; Accelerated Weathering MethodLeaching Resistance of Cloth; Standard MethodLeaching Resistance of Cloth; Minimum Exposure MethodLeaching Resistance of Cloth; Prewet Specimen MethodAccelerated Ageing of Cloth; Oven MethodAccelerated Ageing of Cloth; Closed Container MethodAccelerated Ageing of Cloth; Oxygen MethodTemperature, High; Effect on Cloth FlexibilityTemperature, High; Effect on Cloth BlockingTemperature, Low: Effect on Coated ClothFlame Resistance of Cloth; HorizontalFlame Resistance of Cloth; VerticalFlame Resistance of Cloth; Vertical, FieldFlame Resistance of Material; High Heat Flux Flame ContactFlammability, Burning Rate of Cloth; HorizontalFlammability Test forFlammability, Burning

Sleeping Bag Cloths: Tablet MethodRate of Cloth- 45° Angle



592059305950595159605962596459705972

60006001600260036004601060116015

6016

6020

71027308

75407550

7552

7554

7556

755875607561

75807590

9010

Heating (Spontaneous) of ClothElectrical Resistivity of Fabrics; Determination ofAdhesion of Plied (Double Texture) FabricBond Strength of Bonded and Laminated Apparel ClothsAdhesion of Cemented SeamsAdhesion of Strapped SeamsAdhesion of Wet SeamsAdhesion of Coating; Adhesive MethodAdhesion of Coating; Water Resistance Method

Cordage (Rope)

Length of Ten Turns; CordagePicks Per Inch (Picks/cm); Braided CordageDiameter of CordageCircumference of CordageLength Per Unit Weight; CordageShrinkage of Cordage, Boiling Water Method; Determination ofWater Absorption; CordageStrength and Elongation, Breaking of Cordage; Spliced SpecimenMethodStrength and Elongation, Breaking of Cordage; Non-Spliced SpecimenMethod

Hardness; Cordage

Garments and Ready-Made Articles

Gripping Strength of Shoe Lace TipsAbrasion Resistance; Socks, Hosiery, and Knitted Cloth; Uniform-Abrasion (Schiefer) MethodStretched Width of Knit ItemsShrinkage in Laundering ofReady-Made ArticlesShrinkage in Laundering ofThan Cotton and LinenShrinkage in Laundering ofAccelerated MethodShrinkage in Laundering ofMobile Laundry MethodShrinkage Relaxation; WoolShrinkage in Laundering ofShrinkage in Laundering ofAccelerated MethodShrinkage in Dry Cleaning;

Cotton and Linen Garments and

Garments and Ready-Made Articles Other

Wool Garments and Ready-Made Articles;

Garments and Ready-Made Articles;

Garments and Ready-Made ArticlesShrink-Resistant Wool SocksShrink-Resistant Treated Wool Socks;

Garments and Ready-Made ArticlesShrinkage in Sponging; Garments and Ready-Made Articles

Shade Matching of Textile Materials; Visual Method


SECTION 9 - TEST METHODS


METHOD 6000July 20, 1978

1.

1.1plete

2*

2.1

3.

3.1shall

4.

4.1other

5.

5.1it is

LENGTH OF TEN TURNS; CORDAGE

SCOPE

This method is intended for determining the length of 10 turns (com-revolutions) of a single strand in twisted and plaited cordage.

TEST SPECIMEN

The test specimen shall be not less than 10 feet (3 m) (see 5.2).

NUMBER OF DETERMINATIONS

Unless otherwise specified in the procurement document, one determinationbe made on each sample unit.

APPARATUS

Measurement stick or metal tape. Yardstick, meterstick, metal tape, orsuitable measuring device graduated in increments of 1/8 inch (1 mm).

PROCEDURE

The specimen shall be laid out on a surface without tension, so thatstraight and free from kinks and curls. The surface used shall be a

V - trough formed by two smooth flat planes.

5.2 The measurement shall be made not less than 5 feet (1.5 m) from the endof the specimen.

5.3 Determine the number of final strands in the finished cordage. Make amark on one of the strands. Follow the marked strand for 10 complete revolu-tions of the strand, and make a second mark on the same side of the cordage.The distance between the two marks is the length of one twist times 10, themeasurement shall be made to the nearest 1/8 inch (1 mm).

6. REPORT

6.1 The length of 10 turns of a single strand shall be reported to thenearest 1/8 Inch (1 mm).

70 NOTES

7.1 One turn of a single strand in a rope of twisted or plaited constructionis the distance measured along a rope, parallel to its axis, in which the onestrand makes one revolution around the rope. The measurement of 10 turns ismade for convenience and accuracy of measuring.


METHOD 6000

7.2 It 10 recommended that this test be incorporated into procurementdocuments as an in-process procedure or if included as an end item testin the procurement document, that It be performed as a non-destructive teston the sample unit prior to other tests.



PICKS PER INCH (PICKS/CM); BRAIDED CORDAGE

1. SCOPE

1.1 This method is intended for determining the number of picks per inch(picks/cm) in braided cordage.

2. TEST SPECIMEN

2.1 The specimen for test shall be a single length of braided cordage asfollows:

a. Minimum of 24 inches (610 mm) for cordage up to 3/4 inch (19 mm) incircumference.

b. Minimum of 10 feet (3 m) for cordage 3/4 inch (19 mm) in circumferenceand larger.

3. NUMBER OF DETERMINATIONS

3.1 Unless otherwise specified in the procurement document, three determinationsshall be made on each sample unit for cordage up to 3/4 inch (19 mm) in circumferenceand one determination on each sample unit for cordage 3/4 inch (19 mm) incircumference and larger.

4. APPARATUS

4.1 Magnifying glass, 1 inch (25 mm).

4.2 Measurement stick or metal tape. Yardstick, meterstick, metal tape, orother suitable measuring device graduated in increments of 1/16 inch (1 mm).

4.3 Specimen holder. Clamp or other means for holding the specimen.

5. PROCEDURE

5.1 Unless otherwise specified in the procurement document, all tests shallbe performed on material conditioned under Standard Atmospheric Conditions inaccordance with Section 4 of this Standard.

5.2 One end of the specimen shall be held securely by a clamp or othermeans approximately two inches (51 mm) from one end. The other end shall betwisted in the direction opposite to the helical pattern formed by the carrierstrands during the braiding operation so that the picks are aligned and parallelwith the side of the cord.

FED. TEST METHOD STD. No. 191A

METHOD 6001

5.3 While the carrier strands are clamped in a parallel position, thenumber of picks per inch (picks/cm) in one line of stitches shall be countedand recorded. This procedure shall be repeated for a total of three times atpoints not less than 6 inches (152 mm) apart from each other for cordage up to3/4 inch (19 mm) in circumference; and one time for cordage larger than 3/4inch (19 mm).

6. REPORT

6.1 The number of picks per inch (picks/cm) of the sample unit shall be theaverage of the results obtained, or the single value from the specimen testeddependent upon the size of the cordage and shall be reported to the nearestwhole pick.

6.2 Each individual value used to calculate the average shall also bereported for braided cordage under 3/4 inch (19 mm).


METHOD 6002JulY 20, 1978

DIAMETER OF CORDAGE

1. SCOPE—

1.1 This method is intended for determining the diameter of twisted andbraided cordage 3/16 inch (5 mm) in diameter and under.

2. TEST SPECIMEN

2.1 The specimen for twisted cordage shall be a minimum of 6 feet (1.8m).

2.2 The specimen for braided cordage shall be a minimum of 10 feet (3 m).

3* NUMBER OF DETERMINATIONS

3.1 Unless otherwise specified in the procurement document, three specimensshall be tested from each sample unit.

3.1.1 Three measurements shall be made on each specimen.

4. APPARATUS

4.1 Tension apparatus. Any suitable device may be used for applying therequired load.

4.2 Calipers. Calipers suitable for measuring the diameter of the specimento the nearest 0.01 inch (0.25 mm).

5. PROCEDURE

5.1 A load equal to 1 percent of the minimum breaking strength shall be-. applied to the test specimen for 1 minute before taking measurements. The

load shall be maintained until the required measurements are completed.

5.2 While the specimen is under tension, the 3 measurements shall be madewith the calipers.

5.3 Each measurement shall be made at a different point on the specimen, notless than 2 turns apart on twisted cordage and not less than 3 feet (1 m) aparton braided cordage.

6. REPORT

6.1 The average of the 3 measurements made on a specimen shall be thediameter of that specimen and shall be reported to the nearest 0.01 inch (0.25mm) .


METHOD 6002

6.2 The average of the diameter of the 3 specimens tested shall be reportedas the final diameter of the sample unit to the nearest 0.01 inch (0.25 mm).

6.3 Each individual value used to calculate the average shall also bereported.

FED. TEST METHOD. STD. 191A


CIRCUMFERENCE OF CORDAGE

1. SCOPE

1.1 This method is intended for determining the circumference of twisted,plaited and braided cordage, 5/8 inch (16 mm) circumference and up. Themeasurement shall be made prior to determining breaking strength and elongation.

2. TEST SPECIMEN

2.1 Unless otherwise specified in the procurement document, the specimenshall be as required by Method 6015 ordetermination of the breaking strengthtested.


6016, whichever is applicable for theand elongation of the cordage being

3.1 Unless otherwise specified in the procurement document, one determina-tion shall be made on each specimen tested as required by Method 6015 or 6016whichever is applicable for determining the breaking strength and elongationof the cordage being tested.

4. APPARATUS AND METHODS CITED

4.1 Apparatus.

4.1.1 The device for applying the required load shall be the apparatus re-quired by Method 6015 or 6016 whichever is applicable for determining thebreaking strength and elongation of the cordage being tested.

4.2 Measuring filament. A monofilament yarn or metallic wire with a diam-eter not greater than 0.012 inch (0.3 mm) and of sufficient length to overlapwhen held snugly around the specimen being tested.

Strength and Elongation, Breaking ofMethodStrength and Elongation, Breaking ofSpecimen Method

4.3 Measurement stick or metal tape. Yardstick, meterstick or metal tapegraduated in-increments of 1/16 inch (1 mm).

4.4 Methods cited.

Method 6015,

Method 6016,

Cordage; Spliced Specimen

Cordage; Non-Spliced


METHOD 6003

5. PROCEDURE

5.1 A load equal to 1 percent of the minimum breaking strength of thecordage being tested shall be applied to the specimen and the machine stoppeduntil the required measurement is taken. The measurement shall be made immedi- ately after application of the required load.

5.1.1 While the specimen is under tension a measuring filament shall bepassed around the specimen until it overlaps.

5.1.2 Sufficient tension is applied to the measuring filament to hold itsnugly around the specimen and the filament is cut at the point of overlapping.The machine is restarted.

5.1.3 The cut length of the measuring filament shall be laid out on a flatsurface, straightened out and measured to the nearest 1/16 inch (1 mm).

5.2 The determination shall be made at the center of the specimen.

6. REPORT

6.1 The average of the circumferences of the specimens tested from a sampleunit shall be reported as the circumference of that sample unit and shall bereported to the nearest 1/16 inch (1 mm).

6.2 Each individual value used to calculate the average shall also be re-ported.



LENGTH PER UNIT WEIGHT; CORDAGE

1. SCOPE

1.1 This method is intended for determining the length-weight relationshipof natural and synthetic fiber cordage.

2. TEST SPECIMEN

2.1 The test specimen size shall be as specified below:

SPECIMEN SIZE

Specimen Length (minimum)Feet Meters

Cordage - less than 3 inches (76 mm) incircumference 10 3.0

Cordage - 3 inches (76 mm) to 6 inches (152 mm)inclusive in circumference 5 1.5

Cordage - over 6 inches (152 mm) in circumference 3 0.91

3.

3.1shall

4.

4.1


Unless otherwise specified in the procurement document, one determinationbe made on each sample unit.

APPARATUS

Tension apparatus. Any suitable device may be used for applying therequired load.

4.2 Balance. A balance capable of weighing the specimen to an accuracy of0.25 percent of the specimen weight.

4.3 Measurement stick or metal tape. Yardstick, meterstick, metal tape orother suitable measuring device graduated in increments of 1/16 inch (1 mm).

5* PROCEDURE

5.1 Care should be exercised in removing the specimen without alteration ofthe turns in twisted, braided or plaited construction.


METHOD 6004

5.2 Tension a suitable length of the cordage with a weight equal to 1 percentof the minimum breaking strength specified for the cordage. The appropriatelength as specified in 2.1 shall be marked to the nearest 1/16 inch (1 mm) onthe cordage within 2 minutes of the application of tension.

5.3 Relax the tension on the cordage, and cut out the specimen as marked.

5.4 The test specimen shall then be weighed to 0.25 percent of its weight,and the weight “W” recorded.

5.5 Calculation.

5.5.1 Length per unit weight shall be calculated as follows:

_. Length per unit weightLW

Where: L = Length of specimen In yards, feet or meters, as applicable.W = Weight of specimen in pounds or kilograms, as applicable.

6. REPORT

6.1 The length per unit weight shall be reported to the same accuracy as thespecified requirement.



SHRINKAGE OF CORDAGE, BOILING WATER METHOD; DETERMINATION OF

1. SCOPE

1.1 This method is intended for determining the residual shrinkage ofcordage.

2.

2.1unit.

3.

3.1shall

4.

4.1

TEST SPECIMEN

The specimen shall be a length of 24 inches (610 mm) cut from the sample


Unless otherwise specified in the procurement document, three determinationsbe made from each sample unit.

APPARATUS

Container. A container of suitable size so that the required specimenscan be completely immersed in water when being tested.

4.2 Weights. Weights of suitable size that will cause the specimen to becompletely submerged.

4.3 Measurement stick or metal tape. Yardstick, meterstick, metal tape orother suitable measuring device graduated in increments of 1/16 inch (1 urn).

4.4

4.5

4.6within

Marking medium. Pen marker containing water-insoluble ink.

Whipping twine or tape.

Oven. Circulating-air oven capable of maintaining the required temperature+ 4°F (+ 2°C).—

5. PROCEDURE

5.1 Unless otherwise specified in the procurement document the specimensshall be brought to equilibrium under Standard Atmospheric Conditions in accor-dance with Section 4 of this Standard.

5.2 The rope shall be securely whipped or taped at proper intervals priorto cutting to permit the removal of 24 inch (610 mm) specimens without raveningor fraying the ends.


METHOD 6010

5.3 The specimen shall be laid out on a flat surface and straightened out,so that there are no twists or turns, and an 18-inch (457 mm) length shall bemarked off on the specimen a minimum of 2 inches (51 mm) from either end. Itshall be marked with water-insoluble ink or other suitable marking medium.

5.4 The weights shall be attached to the specimen and the whole assemblyimmersed in boiling water for 15 minutes.

5.5 At the end of the immersion period, the specimen shall be air-driedor dried in a circulating air oven at a temperature not to exceed 185°F (85°C).

5.6 After drying, the specimen shall be returned to equilibrium underStandard Atmospheric Conditions, and the distance between the marks measuredfor change in length to the nearest 1/16 inch (1 mm).

5.7 Calculations.

5.7.1 The calculation for percent residual shrinkage shall be made asfollows:

Residual shrinkage, percent = 18 inches (457 mm) - E x 10018 inches (457 mm)

Where: E = measurement between marks after immersion in boilingwater and return to equilibrium.

6. REPORT

6.1 The residual shrinkage shall be the average of 3 determinations, calcu-lated to the nearest 0.5 percent.

6.2 Each individual value used to calculate the average shall also be reported.



WATER ABSORPTION; CORDAGE

1. SCOPE

1.1 This method is intended for determining the water absorption ofcordage.

2. TEST SPECIMEN

2.1 The test specimen shall be a single length 15from a sample unit.

3.

3.1shall

4.

4.1


Unless otherwise specified in the procurementbe tested from each sample unit.

APPARATUS

Tension apparatus. Any suitablerequired load.

4.2 Container. A suitable containerimmersed as required.

inches (381 mm) long cut

document, five specimens

device may be used for applying the

In which the test specimen shall be

4.3 Wire rack for drying the specimen during testing.

4.4 Marking medium. Pen marker containing water-insoluble ink.

5. PROCEDURE

5.1 Unless otherwise specified in the procurement document, the specimensshall be brought to equilibrium under Standard Atmospheric Conditions in accor-dance with Section 4 of this Standard.

5.2 Tension a suitable length of the cordage with a weight equal to 1 percentof the minimum breaking strength specified for the cordage tested, and mark offthe required 15 inch (381 mm) specimen length.

5.3 The load is released on the sample unit and the specimen cut out atthe marks. A mark is placed 3 inches (76 mm) from each end of the specimenusing water-insoluble ink or other suitable marking material.

5.4 The specimen shall be weighed to the nearest 0.1 g.

5.5 The specimen shall be looped, and the loop immersed in a container ofdistilled water at room temperature until the water surface is level with,but not below or over the marks, so that the cut ends are out of the water.


METHOD 6011

5.6 The specimen shall be allowed to steep for 24 hours.

5.7 The specimen shall be removed and cut at the mark, thus removing thecut ends that were not immersed in the water.

5.8 The specimen shall be placed in a draft free area of the conditionedroom on a wire rack, care being exercised to prevent shaking or squeezing ofthe specimen to remove the excess water. The specimen shall be laid horizontallyand not touched again until the expiration of the required time for draining.The specimen shall be allowed to drain 1-1/2 hours.

5.9 At the end of the 1-1/2 hour period, the sample shall again be weighedand the amount of water absorption recorded.

5.10 Calculations.

Water absorbed, percent =

(Weight (g)of steeped sample with ends cut)-9/15 of original sample weight (g)9/15 of original sample weight (g)

x 100

6. REPORT

6.1 The amount of water absorbed shall be the average of the specimens tested,and shall be reported to the nearest 1.0 percent.




STRENGTH AND ELONGATION, BREAKING OF CORDAGE;

SPLICED SPECIMEN METHOD

1. SCOPE

1.1 This method is intended for determining the breaking strength and elongationof spliceable cordage.

2. TEST SPECIMEN

2.1 The specimen shall be a single length of the cordage, and shall have aneye splice at each end. The inside length of each eye shall be not less than7 inches (178 mm) or more than 24 inches (610 mm) with the eye closed. Thedistance of clear rope between the outer ends of the splices shall not be lessthan 3 feet (914 mm).

2.1.1 Eye splice on 3-strand twisted cordage (Natural fiber). Eye splices onnatural fiber twisted three strand cordage shall be accomplished with a minimumof three full tucks. Tapered splices are permitted (see Figure 6015A).

2.1.2 Eye splice on 3-strand twisted cordage (Synthetic fiber). Eye splices onsynthetic fiber twisted three strand cordage shall be accomplished with a minimumof four full tucks. Tapered splices are permitted (see Figure 6015A).

2.1.3 Eye splice on plaited cordage (Synthetic fiber). Eye splices on syntheticfiber plaited cordage shall be accomplished with a minimum of two double folds andtwo singles (see Figure 6015B).

2.1.4 Eye splice on hollow braided cords,. Eye splices on hollow braidedcordage shall be accomplished with a tapered buried eye splice. The taper shallconsist of cutting out-every fifth pick-in right and left-strands for 16, 24,and 32 strand round braids and alternately fourth and fifth picks for 20 strandbraid (see Figure 6015C).


3.1 Unless otherwise specified in the procurement document, the number ofdeterminations shall be as follows:

Rope with a3 specimens

Rope with a2 specimens

circumference up to and including 5 inches (127 mm):shall be tested from each sample unit.

circumference over 5 inches (127 nun):shall be tested from each sample unit.


METHOD 6015

4. APPARATUS

4.1 Testing machine. The testing machine shall consist of three main parts:

(a) Straining mechanism.(b) Means for holding the specimen.(c) Load indicating mechanism.

4.1.1 Straining mechanism. The straining mechanism shall be such that themovement of the pulling clamp shall be uniform at a rate of 6 ± 1 inches(152 ± 25 mm) per minute under no load. The distance between the clamps isarbitrary.

4.1.2 Specimen holders. The means for holding the specimen during testingshall consist of round metal pins or posts. The pins or posts shall be ofsufficient size and held in any manner that will assure breaking of thespecimen in the free length.

4.1.3 Load indicating mechanism.. The load indicating mechanism shall be acalibrated dial, scale or chart for indicating the applied load. Unless other-wise specified for load determination, the mechanism shall be adjusted or setso that the maximum load required to break the specimen will remain on thedial, scale or chart after the specimen is ruptured.

4.1.4 The test machine shall be of such capacity that the maximum loadrequired to break the specimens shall not be greater than 85 percent or lessthan 15 percent of the rated capacity.

4.1.5 Measuring scale.increments of 1/8 inch and for measuring between

Yardstick, meterstick, or metal tape graduated in(1 mm), for use in applying gage marks to the specimen,the marks to determine elongation.

5. PROCEDURE

5.1 Preparation of specimen. Unless otherwise specified in the procurementdocument, the specimen shall be conditioned and tested under Standard AtmosphericConditions in accordance with Section 4 of this Standard.

5.1.1 When elongation of the specimen is to be determined a load equal to1 percent of the specified minimum breaking strength shall be applied to thespecimen. While under tension, two fine gage marks shall be spaced 30 inches(762 mm) apart on the specimen in such a manner that neither mark will becloser than 3 inches (76 mm) to the inner end of either splice.

5.1.2 If soaking of the splices is required, (this requirement applies tospecimens of cordage made from jute, sisal, manila, henequen and other hardfiber ropes) the eyes and splices up to the inner ends of the splices shallbe immersed in water for a minimum of 15 minutes. Gage marks if requiredfor determining elongation shall be placed on the specimens before soaking.


METHOD 6015

5.2 Elongation. Elongation shall be determined during the determinationof the breaking strength of the specimen. It shall be measured when the loadapplied during the test is 75 percent of the specified minimum breakingstrength of the specimen being tested.

5.2.1 When the specimen is pulled to 75 percent of the specified minimumbreaking strength, the machine may be stopped and the distance “E” betweenthe gage marks on the specimen measured and recorded. The distance betweenthe marks shall be measured to the nearest 1/8 inch (1 mm).

5.3 Breaking strength. If the machine has been stopped for determinationof elongation after the distance between the marks has been measured themachine shall be restarted and the load increased until the specimen breaks.

5.3.1 If the splices are noticed to be slipping and the individualmeasurement falls markedly below the apparent average such a measurementshall be disregarded and another specimen shall be tested from the samesample unit.

5.4 Calculations. The elongation shall be calculated as follows:

Elongation, percent = E -O x 100o

Where: E = The distance in inches (mm) between gage marks at 75 percentof the specified minimun breaking strength.

O = The distance in inches (mm) between the gage marks at 1 per-cent of the specified minimum

6. REPORT

6.1 Breaking strength. The breaking strengththe average of the specimens tested and shall be

Cordage Breaking Strength

0 to 150 lbs (0 to 670 N)151 to 2000 lbs (671 to 8900 N)2001 to 50,000 lbs (8901 to 222, 500 N)50,000 lbs and up (222,501 and up)

6.2 Elongation. The elongation of the sample

breaking strength (see 5.1.1).

of the sample unit shall bereported as follows:

Reported to Nearest

1 lb (1 N)5 lbs (10 N)10 lbs (100 N)100 lbs (1000 N)

unit shall be the average of thespecimens tested and shall be reported to the nearest 0.5 percent.



METHOD 6015



STRENGTH AND ELONGATION BREAKING OF CORDAGE; NON-SPLICED SPECIMEN METHOD

1. SCOPE

1.1 This method is intended for determining the breaking strength andelongation of cordage that does not require eye-splices to be tested.

2. TEST SPECIMEN

2.1 The specimen shall be a single length of the finished cordage not lessthan 24 inches (610 mm) long.


3.1 Unless otherwise specified in the procurement document, five specimensshall be tested from each sample unit.

4. APPARATUS AND METHODS CITED

4.1 Apparatus.

4.1.1 The apparatus for determining the breaking strength and elongationshall be as described in Method 5100, except that the flat clamps shall be re-placed with smooth clamps of the spool or drum type and the speed of the machinebefore the application of a load to the specimen shall be 6 ± 1 inches per minute(152 ± 25 mm/min).

4.1.2 Ink marker. Ink marker for marking specimen to

4.1.3 Scale and dividers. A pair of dividers opening12 inches (T305 mm) and a scale graduated in divisions of

4.2 Method cited.

Method 5100, Strength and Elongation, Breaking ofGrab Method.

determine elongation.

a distance not less than0.01 inch (0.3 mm).

Woven Cloth;

5. PROCEDURE

5.1 Preparation of specimen. Unless otherwise specified inthe procurement document material testing shallin Section 4 of this Standard.

be performed under Standard Conditions as specified


METHOD 6016

5.1.1 The distance between the clamps or drums (gage length) at the start ofthe test shall be 10 inches (254 mm).

5.1.2 The specimen shall be placed in the clamps or drums of the machine and aload applied equal to 1 percent of the specified minimum breaking strength of the specimen being tested. The machine shall be stopped and the strain maintained onthe specimen.

5.1.3 While the strain is being maintained on the specimen two fine ink marksshall be spaced 5 inches (127 mm) apart and neither mark shall be placed closerthan 1-1/2 inches (38 mm) to either clamp or drum.

5.1.4 The machine shall be restarted and the testing continued to completion.

5.2 Elongation. Elongation shall be measured during the determination of thebreaking strength of the specimen. It shall be measured when the load appliedduring the test is 75 percent of the specified minimum breaking strength of thecordage being tested.

5.2.1 When the specimen is pulled to 75 percent of the minimum breaking strengthof the cordage being tested, the machine may be stopped and the distance betweenthe two fine marks on the specimen is measured and recorded. The distance “E”, ininches (mm), between the marks shall be measured to the nearest 0.05 inch (1.3 mm).

5.3 Breaking strength. If the machine is stopped to measure the elongation itshall be restarted and the load increased until the specimen ruptures.

5.3.1 If a specimen slips between the jaws, breaks in the jaws or for any reasonof machine malfunction an individual measurement falls markedly below the apparentaverage test results, such a measurement shall be disregarded and another specimenshall be tested from the same sample unit.

5.4 Calculation.

5.4.1 The elongation shall be calculated as follows:

Elongation, percent = E - 5 inches (127 mm)5 inches (127 mm) x 100

Where E = Distance between the marks, in inches (mm), when the loadis 75 percent of the specified minimum breaking strengthof the cordage being tested.

6. REPORT

6.1 The elongation shall be the average of the specimens tested and reportedto the nearest 0.1 percent.

FED. TEST METHOD. NO. 191A

METHOD 6016

6.2 The breaking strength shall be the average of the specimens tested and shallbe reported to an accuracy of 0.5 percent of the indicated (recorded) breakingstrength.

6.3 Each individual value used to calculate the average (for elongation andbreaking strength) shall also be reported.



1. SCOPE

1.1 This method is intendedplaited cordage.

2.

2.1shall

3.

3.1

HARDNESS; CORDAGE

for determining the hardness of twisted and

TEST SPECIMEN

Unless otherwise specified in the procurement document, the test specimenbe a minimum of 20 feet (6.1 m).


Unless otherwise specified inbe taken from each sample unit and 3

4. APPARATUS

the procurement document, one specimen shalldeterminations shall be made on each specimen.

4.1 Compression testing machine. The machine shall be capable of maintaininga loading rate of 6 inches + 1 inch (152 mm ± 25 mm) per minute. The machineshall be equipped with a suitable autographic recording device or other suitablemeans for measuring hardness to a maximum of 100 pounds (445 N).

4.2 Pressure plate. The diameter (inches) (mm) of the orifice in the pressureplate through which the spike passes after being forced through the specimen beingtested shall be approximately twice the diameter of the specimen being tested butnot less than 1/2 inch (13 mm) (see figure 6020B and paragraph 7.1).

4.3 Spike. The spike shall conform to the requirement as shown in figure 6020A.

5. PROCEDURE

5.1 The spike inserted in the rope shall be placed in the compression testingmachine in such a manner that the force necessary to push the spike through therope will be measured with the rope in the relaxed state, without tension andcompletely free to absorb the force of the penetrating spike (see figure 6020Cand paragraph 7.1). The spike shall be inserted between the strands of the ropeuntil visible on the opposite side, and shall be not less than 5 feet (1.5 m) froma cut end (which will be securely sewed or taped to prevent unlaying), and notless than 5 feet (1.5 m) from any area subjected to a previous hardness test.Rate of loading shall be 6 inches ± 1 inch (152 mm ± 25 mm) per minute. The loadnecessary to force the spike to 1/2 inch (13 mm) diameter shall be measured oncordage up to and including 2-3/4 inches (70 mm) in circumference. The loadnecessary to force the spike to the 1 inch (25 mm) diameter mark shall be measuredon cordage greater than 2-3/4 inches (70 mm) circumference. The 1/2 inch (13 mm)and 1 inch (25 mm) marks shall be considered to be reached when the mark dis-appears behind the strand.


METHOD 6020

5.1.1 When a specimen of plaited cordage is tested the spike shall beinserted through the center of the specimen so that two pairs of strands areon each side of the spike.

5.2 Readings of the hardness measurements resulting from the spike, together with the rope specimen being forced through the orifice and/or binding withinthe orifice, shall be recorded.

6. REPORT

6.1 The hardness of each specimen shall be the average of 3 determinations,and shall be reported to the nearest 1 pound (to the nearest 1 N).

6.2 Each individual value used to calculate the average shall also bereported.

7. NOTES

7.1 Figures 6020B and 6020C are included as information to the contractorto illustrate the procedure for conducting the test.


METHOD 6020


METHOD 6020


METHOD 6020
