13.07.2015 Views

DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

DOE-STD-1090-96, DOE Standard Hoisting and Rigging Manual ...

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

<strong>DOE</strong>·<strong>STD</strong>·<strong>1090</strong>-<strong>96</strong> (Rev-1)certification by the manufacturer or a pull testcertified by a qualified person is acceptable.11.3.5.3 OperationThe following shall apply to all personnel who usesynthetic-web slings:a. Determine the weight ofthe load.l...-_I!.!..!ft;,'2 sling angle is too,u:Iow=-----,the webcan tear here.Figure 11-20. Effect of low sling angle.d. Slings shall be removed from service ifanyofthe following defects are visible:1. Acid or caustic burns.2. Melting or charring ofany part ofthesurface.3. Snags, punctures, tears, or cuts.4. Broken or worn stitches.5. Wear or elongation exceeding theamount recOmmended bymanufacturers.6. Distortion offittings.A sample periodic inspection form is included asExhibit III at the end ofthis section. This form isintended to be a sample only <strong>and</strong> is not intended tobe m<strong>and</strong>atory.11.3.5.2 Proof-Testinga. When specified by the purchaser, webslings ofall types shall be certified as having beenproof-tested prior to initial use.1. The proofload for single-leg slings<strong>and</strong> endless slings shall be 200 percent ofthevertical rated capacity.2. The proofload for multiple-leg bridleslings shall be applied to the individual legs <strong>and</strong>shall be 200 percent of the vertical rated capacityofa single-leg sling. Master links to whichmultiple-leg slings are connected shall beproof-loaded to 200 percent times the forceapplied by the combined legs.b. Test loads shall be accurate to within-5 percent, +0 percent ofstipulated values. Eitherb. Select a sling having suitable characteristicsfor the type ofload, hitch, <strong>and</strong> environment.c. Ensure that slings with end fittings that areused in a choker hitch have sufficient length sothat the choking action is on the body of the sling.d. In slings used in a basket hitch, balance theload to prevent slippage.e. Do not drag slings across the floor or overany abrasive surface.f. Do not twist or tie slings into knots.g. Protect slings from being cut by sharpcomers, sharp edges, <strong>and</strong> highly abrasive surfaces.h. Do not pull slings from under loads when aload is resting on a sling.i. Do not use synthetic-web slings to lift loadsin excess of the rated capacity, properly deratedfor other than straight-pull configuration.j. Store synthetic-web slings to preventmechanical or chemical damage.k. Do not use nylon slings where acidconditions exist.1. Do not use polyester <strong>and</strong> polypropyleneslings where caustic conditions exist.m. Do not use polyester <strong>and</strong> nylon slings attemperatures in excess of 180 degrees F (82degrees C), nor polypropylene slings at greaterthan 200 degrees F (93 degrees C).n. Do not use aluminum fittings where acid orcaustic fumes, vapors, sprays, mists or liquids arepresent.o. Ensure that each sling is permanentlymarked to show:1. Name or trademark ofmanufacturer.Chapter 11Wire Rope <strong>and</strong> Slings 11-36

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!