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

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

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12.5 TURNBUCKLES<strong>DOE</strong>-<strong>STD</strong>-I090-<strong>96</strong> (Rev-I)a. Turnbuckles may be used in sling systemsprovided that they are engineered, designed, <strong>and</strong>approved as a part ofthe sling system. Approvedturnbuckles shall be marked <strong>and</strong> identified for usewith the sling set for which they were designed<strong>and</strong> shall be load-tested as part of the sling set.Before each use, turnbuckles shall be inspected fordamage. Damaged threads, jamb nuts, or bentframe members make the unit unsuitable for use.b. Jamb nuts or locking devices must betightened or locked before making lifts withturnbuckles. See Figure 12-4 for safe workingload information <strong>and</strong> turnbuckle inspection areas.c. Turnbuckles shall be fabricated from forgedalloy steel <strong>and</strong> shall have a minimum design factorofS:!.d. Turnbuckles used in applications where thereis vibration shall be secured to the frame withlocks, pins, or wires to prevent turning orloosening.Chapter 12<strong>Rigging</strong> Accessories 12-14

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