Recommended Standard Specification
For
Synthetic Webbing
Ud For Tie Downs
WSTDA-T-4
TM
©2008Web Sling&Tie Down Association,Inc.
$25.00
This Recommended Standard Specification has been formulated as a guide to urs,manufacturers, industry and government to insure the proper design,testing and inspection of webbing ud for Synthetic Web Tie Down Asmblies.The existence of this recommended standard specification does not,however,prevent members of the Web Sling&Tie Down Association,Inc.and other manufacturers from manufacturing or lling products not conforming to this standard.
©Web Sling&Tie Down Association.All rights rerved.No part of this publication may be produced,stored in a retrieval system,or transmitted,in any form or by any means,electronic, mechanical,photocopying,recording or otherwi,without the prior permission of the Web Sling&Tie Down Association.This publication is circulated subject to the condition that it shall not,by way of trade or otherwi,be lent,sold,hired out or otherwi circulated without WSTDA's prior connt.
Published and Copyright Revid2008
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CHAPTER 1.0
TERMINOLOGY AND DEFINITIONS
SECTION
1.1PURPOSE SECTION
1.2DESCRIPTION
SECTION 1.3DEFINITION OF TERMS
1.1.11.
2.11.2.2This chapter provides a description and definitions of synthetic webbing for the purpo of
curing cargo.
PURPOSE DESCRIPTION
This chapter covers requirements for Nylon and Polyester webbing ud as the primary
raw material for synthetic web tie downs.
Synthetic tie down webbing is a high-tenacity narrow fabric woven in a variety of weaves and principally ud for tie downs that have to withstand tensile load.
ABRASION -The mechanical wearing of the webbing surface resulting from frictional contact with other materials or objects.
BINDER -Yarn that is ud to hold the two plies together in the tie down webbing.
BREAKING STRENGTH -The load in pounds or kilograms at which the webbing fails.
CATCH CORD -Yarn ud to lock and prevent raveling of weft yarn on shuttleless weaving machinery.
COATING -A finish applied to the webbing to resist liquids,abrasion,environmental deterioration,etc.
CREEP -Delayed deformation that is time-dependent and is exhibited by material that is subjected to a continuing load.Delayed deformation may be recoverable or non-recoverable following removal of the applied load.
DENIER -A numbering system which express the weight in grams of a multifilament yarn that is 9000meters in length.Lower numbers reprent finer sizes of a filament yarn and higher numbers reprent coarr sizes of filament yarn.
ELONGATION -The measurement of webbing stretch,expresd as a percentage of the original unloaded webbing length at a given applied load.
FILLING -The yarn running from lvedge to lvedge at right angles to the warp.Also referred to as weft and picks.
HIGH TENACITY -Higher than normal tensile strength with a range of 6.0to 9.5grams per denier as compared to regular tenacity of lower than 6.0grams per denier.
