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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 ...

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<strong>DOE</strong>·<strong>STD</strong>·I090-<strong>96</strong> (Rev-I)12.4 EYEBOLTSa. Eyebolts used for hoisting shall be fabricatedfrom forged carbon or alloy steel.b. Eyebolts shall have a minimum design factorof5:1. The vertical safe-working load shall beforged, stamped, or inscribed into each eyebolt bythe manufacturer or the owner. A permanentlyattached metal tag bearing the same informationmay also be used.c. Eyebolts shall have Class n fit <strong>and</strong> have aminimum ofone-<strong>and</strong>-one-half diameters threadengagement. Nuts on through-eyebolts shall beself-locking or shall be secured with lock wires orother suitable means to prevent loosening.d. The following shall apply to eyebolt users:e. Use shouldered eyebolts for all applications,except where it is not possible due to theconfiguration ofthe item to be lifted. See Figure12-3. When unshouldered eyebolts are used, donot use nuts, washers, <strong>and</strong> drilled plates to makeshouldered eyebolts.f. Do not use wire-type or welded eyebolts in<strong>DOE</strong>-lifting operations.g. Ensure shoulders seat snugly against thesurface on which they bear.h. Spacers may be used, ifnecessary, to ensureproper seating ofthe eyebolt. Use a flat spacer nothicker than 1/16 ofthe outside diameter <strong>and</strong>approximately the same diameter as the maximumaxis of the eyebolt shoulder with the smallestinside diameter that will fit the eyebolt shank.i. Spot-face or slightly counterbore the surfaceofthe item to which the eyebolt is fastened to theminimum depth needed for cleanup of the surface<strong>and</strong> complete bearing ofthe shoulder or spacer onthe bearing surface.j. Carefully inspect each eyebolt before use.Visually inspect the hole to ensure that there hasbeen no deformation. Check the condition ofthethreads in the hole to ensure that the eyebolt willsecure <strong>and</strong> the shoulder can be brought downsnug. Destroy eyebolts that are cracked, bent, orhave damaged threads.k. Ensure that the shank ofthe eyebolt is notundercut <strong>and</strong> is smoothly radiused into the planeofthe shoulder or the contour of the ring fornonshouldered eyebolts.l. When more than one eyebolt is used inconjunction with multiple-leg rigging, spreaderbars, lifting yokes, or lifting beams should be usedto eliminate angular lifting. However, wherespreaders, yokes, or beams cannot be used,eyebolts may be used for angular lifting, providedthat the limiting conditions in Table 12-3 areconsidered. An angular lift is any lift in which thelifting force is applied at any angle to thecenterline ofthe shank ofthe eyebolt.m. Where nonshouldered eyebolts must be usedfor a critical lift, ensure that an engineeringanalysis ofthe loading <strong>and</strong> load vectors is made<strong>and</strong> approved before use. Minimize the anglebetween the sling <strong>and</strong> the eyebolt axis. In no caseshall the eyebolt loading exceed the values shownin Table 12-3.12-11Chapter 12<strong>Rigging</strong> Accessories

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