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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)load radius. Follow these requirements to avoidbuckling the boom or tipping:1. Know the radius ofthe load; the radiusis measured from center ofrotation, not from theboom foot pin.2. Always operate within the ratedcapacity ofthe machine.3. The gross capacity includes weight ofhook, block, <strong>and</strong> any material-h<strong>and</strong>ling devices,(i.e., slings, concrete bucket, magnet lifter, etc.);subtract the weight ofall these to fmd the trueweight (net capacity) the crane can h<strong>and</strong>le safely.4. Ratings are based on operating themachine on fIrm, level ground; outriggers shouldbe properly extended <strong>and</strong> lowered beforeoperation.5. Avoid fast swings, hoists, or suddenbraking; these can cause overloads.6. Do not h<strong>and</strong>le large, heavy loads instrong winds; the wind can catch the load <strong>and</strong>create an unstable condition.b. Test stability before lifting heavy loads.Check outrigger footing. Lift load slightly offtheground <strong>and</strong> stop. Check the machine formovement <strong>and</strong> check to be sure the brakes holdwith the load elevated.c. Never use machine stability to determinecapacity.d. Ifthere are any indications of tipping, themachine is already overloaded for that workingradius.e. Do not back crane away from the load whilecarrying a maximum load; this may cause thecrane to tip.f. Always use outriggers when making lifts(with pick-<strong>and</strong>-carry units), <strong>and</strong> never lift a loadforward ofthe front outriggers, unless allowed onmanufacturer's load chart.g. Lower outrigger jacks until the tires clear theground, <strong>and</strong> level the unit to reach the machine'sfull capacity. Recheck <strong>and</strong>, ifnecessary, resetoutriggers between heavy lifts.h. Always fully extend outrigger beams unlessotherwise specifIed on the manufacturer's loadcharts for the crane.9.5.1.4 Observing Boom-LengthPrecautionsa. Always use the shortest boom possible.b. Make only vertical lifts; never pull the loadsideways.c. Keep speed slow in lifting <strong>and</strong> loweringloads.d. Swing carefully <strong>and</strong> slowly, <strong>and</strong> avoid boomor jib "whipping"; check counterbalanceclearance.e. Do not let the load strike the boom oroutriggers.f. Allow maximum clearance between the hookblock <strong>and</strong> boom-point sheaves.g. Keep near-capacity loads as close to theground as possible.h. Avoid hitting anything with the boom; anengineering analysis shall be made before puttingthe crane back in service ifthis occurs.9.5.2 Operating Near PowerLines <strong>and</strong> TransmitterTowersIt is recognized that operating mobile craneswhere they can become electrifIed from electricpower lines is an extremely hazardous practice. Itis advisable to perform the work so there is nopossibility ofthe crane, load line, or loadbecoming a conductive path, (Figure 9-2).The following steps shall be taken to minimize thehazard ofelectrocution or serious injury as a resultofcontact between the energized power lines <strong>and</strong>the crane, load line, or load:a. The (electric) Power MarketingAdministrations in <strong>DOE</strong> may deviate from therequirements ofTable 9-3, providing the work isdone according to line management-approvedprocedures that do not conflict with statutoryregulations or approved variances from theseregulations.b. Any overhead wire shall be considered to bean energized line unless <strong>and</strong> until the personowning the line or the electrical utility authoritiesindicate that it is not an energized line.9-15Chapter 9Mobile Cranes

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