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Boom  Angle  Indicators
Boom Pendants

Equipment Operator Basic - Beginning construction equipment operators manual
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while the boom is under load (fig. 12-15, view A). The To  check  the  accuracy  of  the  boom  angle boom angle on lattice boom cranes is the angle between indicator,  place  a  3-foot  builders  level  on  the the center line of the boom (from the boom butt pins to center  boom  section  and  raise  or  lower  the  boom the boom tip sheave) and the horizontal while the boom until  the  level  indicates  the  boom  is  level is under load (fig. 12-15, view B). (fig.  12-16).  At  this  point  the  boom  angle  indicator Figure  12-15.—Boom  angle  configurations. Figure 12-16.-Check accuracy of boom angle indicator. 12-8







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