For High Performance Yarn (HPY) Roundslings Draft ...

1 RECOMMENDED STANDARD SPECIFICATIONWSTDA-RS-1HP 2014 WEB SLING & TIE DOWN ASSOCIATION, Performance yarn (HPY) Roundslings $ Revisions, August 2014 NOT FOR PUBLICATION Web Sling & Tie Down Association. All rights reserved. No part of this publication may beproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic,mechanical, photocopying, recording or otherwise, without the prior permission of the Web Sling &Tie Down Association. This publication is circulated subject to the condition that it shall not, by wayof trade or otherwise, be lent, sold, hired out or otherwise circulated without WSTDA s prior recommended standard specification has been formulated as a guide to users, industry andgovernment to insure the proper use, maintenance and inspection of synthetic high performanceyarn (HPY) polyester Roundslings . The existence of this recommended standard specification doesnot, however, prevent members of the Web Sling & Tie Down Association, Inc.

2 And othermanufacturers from manufacturing or selling products beyond the scope of this recommendedstandard Revisions, August 2014 NOT FOR PUBLICATIONFOREWORDMANDATORY AND ADVISORY RULESWEB SLING & TIE DOWN ASSOCIATION, Laurel Bush Road, Suite 201 Bel Air, MD 21015 First Published and Copyright 2014 Phone: (443) 640-1070 Fax: (443) 640-1031 Email: recommended standard specification applies to Roundslings made of high performanceyarn used for the lifting, suspending, transporting, lowering and other load handling underknown conditions. It recommends construction, identification and marking of theseroundslings. In addition, it provides sling capacity information and important practicaladvice on the use, maintenance and inspection of exclusion from this Recommended Standard Specification of High PerformanceRoundslings of different synthetic materials and capacities is not intended to preclude theiruse and shall not be interpreted in this made from materials or construction other than those detailed in thisRecommended Standard Specification shall be used in accordance with therecommendations of the roundsling manufacturer or qualified person.

3 The specificationscontained in this Recommended Standard Specification for high Performance yarnroundslings, hereafter noted as simply HPY Roundslings , were formulated under theauspices of the Web Sling and Tie Down Association, Inc. The Recommended StandardSpecification is intended to assist users in specifying the proper roundsling for theirparticular needs; to serve as a guide to industry in the construction and use of syntheticroundslings; and to serve as a guide to governmental and other regulatory bodiesresponsible for the proper use and inspection of Roundslings . For information not contained inthis Recommended Standard, consult the roundsling is the paramount consideration involved in the use of any roundsling. The appropriateroundsling shall be selected for the specific lift. Users of Roundslings shall have knowledge onthe proper method of lifting item(s) and how to adjust rigging methods as lifting situationschange.

4 Also, users shall be knowledgeable about industry local, state, federal and provincialregulations applicable to the use of slings. Figures shown in this standard are for illustrationonly and are not intended to represent usage, design or manufacturing rules of this standard are characterized by the word shall. If a rule is of the advisory nature, it is indicated by the word should or is stated as a Revisions, August 2014 NOT FOR PUBLICATIONCONTENTSCHAPTER TERMINOLOGY & DEFINITIONS1112-4 Section Basic Definition of MATERIALS & CONSTRUCTION4444555566-7 Section Core Design Sling Identification and Marking Rated STANDARD PROCEDURES FOR TESTING77-888-99-1011 Section Types of Test Proof Testing Procedures for Destructive Pull Sample Destructive Pull RECOMMENDED OPERATING PRACTICES1111-121212-1313-1616-1819-2020 21 Section Training Sling Selection Sling Lift Planning Proper Use Around Other Mechanical Environmental Procedures For Destructive Pull Revisions.

5 August 2014 NOT FOR PUBLICATION1 CHAPTER TERMINOLOGY AND DEFINITIONSS ection PURPOSES ection DESCRIPTIONS ection BASIC TYPESF igure 1-1 This chapter provides a description of high Performance yarn (HPY) Roundslings anddefinitions which apply to such roundsling is fabricated of continuous load bearing core(s) made from syntheticyarns, not woven, fully enclosed in a protective cover(s) with or without fitting(s).ENDLESS - A roundsling in which the load bearing core(s) is wound in a continuousmanner and fully enclosed within a protective cover(s). (See Figure 1-1.) 1-3 BRIDLE (Multi-Legged) - A sling assembly featuring a single top connection pointwith sling leg(s) and may have connection hardware at the bottom of the leg(s).(See Figure 1-3.) 1-2 EYE & EYE - A roundsling with a loop eye at each end, typically formed by placingan additional sleeve or other cover material over the body.

6 (See Figure 1-2.) Revisions, August 2014 NOT FOR PUBLICATION2 Section DEFINITIONS OF TERMSH itch/Vertical -A method of rigging in which the load is attached to one end of the round-sling and the other end of the roundsling is attached to the lifting device.(See Figure 1-4.)Hitch/Choker -A method of rigging in which the roundsling is placed around the load,passed back through itself and then attached to the lifting device. (See Figure 1-4.)Hitch/Double Wrapped Choker -A method of rigging similar to Hitch/Choker except thatthe roundsling is passed around the load twice. (See Figure 1-4.)Hitch/Double Wrapped Basket -A method of rigging similar to Hitch/Basket except thatthe roundsling is passed around the load twice. (See Figure 1-4.)Hitch/Basket -A method of rigging in which the roundsling is passed around the load andboth ends are attached to the lifting device(s).

7 (See Figure 1-4.)Abrasion-The mechanical wearing or scuffing of a surface, resulting from frictional move-ment between two materials or Person -Selected or assigned by the employer or employer s representative asbeing competent to perform specific A load-bearing device for the purpose of attaching fittings to the That yarn which comprises the load-bearing part(s) of the A seamed or seamless protective material that completely encloses the core(s).Elongation -The measurement of stretch, at a given load, expressed as a percentage ofthe original unloaded -A load bearing device that is attached to the Wrapped ChokerHitchDouble Wrapped BasketHitchBasketBearing Stress-The compressive stress located at the contact surfaces between two objectsthat occurs when they are attached together and then loaded in Strength-That force in pounds or kilograms at which point any load bearing coreof the roundsling -A finish applied to the load-bearing core, cover and/or protective sleeve for aspecial 1-4 Design Factor- The ratio of the breaking strength to the rated capacity for each Revisions, August 2014 NOT FOR PUBLICATION3 Length (Reach) -The distance between the extreme end bearing points of the roundsling,including fittings if applicable.

8 (See Figure 1-5.)Lifting -Raising or lowering an unencumbered Person -A person who by possession of a recognized degree or certificate ofprofessional standing or who by extensive knowledge, training and experience hassuccessfully demonstrated the ability to solve or resolve problems related to thesubject matter and Capacity (Working Load Limit) -The maximum allowable loading force for eachroundsling assembly for the type of hitch being Protection -Material of sufficient strength, thickness and construction used to protectthe HPY Roundsling from abrasion or cutting. Some forms of protection will not preventcutting and provide abrasion protection Loading -A condition of rapid lift, sudden shifting of a load or arrest of a falling loadthat causes the forces in a sling to notably exceed that which would have occurredduring normal loading ServiceNormal Service -The use of web slings in typical operating conditions which will notcause a rapid rate of observable degradation in sling materials.

9 This includes the use ofslings wherein the rate of sling wear is not accelerated due to the rate of operation, orexposure to highly abrasive surfaces or to edges that generate cutting of any of thesling Service -The use of slings in conditions that may cause a rapid rate ofobservable degradation in sling materials. This could include the use of slings at a highrate of operation, direct exposure of the slings to materials in a manner that maygenerate an elevation of surface temperatures or cause a high rate of abrasive wear orcutting of the sling 1-5 Proof Load Test-A non-destructive load test of the roundsling to some multiple or ratedcapacity of that roundsling, including fittings if applicable (Usually two (2) times therated capacity for lifting Sleeve-An additional non load-bearing, cover material that provides extraprotection to the A sling type used for general lifting or material handling purposes that iscomprised of a load-bearing core(s), made from synthetic yarns of unwoven continuousfilament fibers, which is fully enclosed in a protective cover(s).)

10 Sling Contact Width-The effective width or spread of the sling that results at contactareas with the load or connection hardware when the roundsling is Revisions, August 2014 NOT FOR PUBLICATION4 Special Service -The use of slings intermittently or in a manner that may result inan inconsistent rate of operation of the slings in a manner that may generate a highlyvariable rate of surface cutting, abrasive wear or other Fiber -Man-made -The synthetic yarn , used to sew the -The synthetic fibers used to make the webbing and Load Limit- See rated MATERIALS & CONSTRUCTIONS ection PURPOSES ection CORE core yarn shall be comprised of high tenacity, continuous filament yarn , woundtogether in a plurality of turns. The high tenacity yarn that is used in the constructionof the roundsling load bearing core shall consist of yarns having tenacities of 15 gramsper denier ( cN/dtex) or higher.