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Tuesday, November 30, 2021

Risk Assessment for Tower Crane Installation-Erection

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ACTIVITIES

1- PRE-COMMENCEMENT ACTIVITIES

  • Pre-approval of foundations for the rail system installed at the site, including the electrical supply
  • Pre-Commencement Activities (Obtaining Method Statement, J.S.A. and STARRT Form)
  • Site preparation Slinging preparation

2- TRANSPORTING MATERIALS

  • Ensure the safety of Components of Tower
  • Crane from Outside (the crane parts have been dimensioned in such a way that no special transport arrangement is needed)
  • Ensure the counterweights on a truck
  • Receiving equipment/materials at the site (the reception and unloading of the parts must be performed systematically)
  • Unloading Material using Mobile Crane

3- ERECTION and INSTALLATION OF THE RAILING (TRAVELLING CARRIAGE) TO APPROVED FOUNDATION

  • The travelling carriage comprised one fixed and two mobile chassis beams which are linked together using PINS & ensure the PINS was attached.
  • The boogies must BE LOCKED PROPERLY AND SECURELY to the track rails using rail clamps for the duration of the erection.
  • Using mobile crane
  • Bolting of the railing

4- ERECTION and INSTALLATION OF CLIMBING CAGE

  • Using mobile crane
  • Tightening of the loose grate’s screws
  • The attached top of the tower and slewing ring with planes are lifted in place and fastened to the tower by a screw joint
  • Working at heights

5- GROUND ASSEMBLE OF COUNTER JIB AND SUPPORT BARS

  • Using mobile crane
  • Bolting, hammering, and screwing

6- ERECTION and INSTALLATION OF COUNTER JIB AND SUPPORT BARS

  • Using mobile crane
  • Electrical connection
  • Working at heights
  • Tower top crane assemble

7- ERECTION AND INSTALLATION OF COUNTERWEIGHT

  • Using mobile crane

8-ERECTION and INSTALLATION OF OPERATOR CABIN

  • Using mobile crane
  • Installation of control cables and electrical to the operator cabin.
  • Placing a ballast weight into the hook (All jib lengths are balanced with a 2000 kg weight
  • Ballast weight)
  • Installation/connection of hydraulic system, aggregate, and hoses (including electrical
  • supply)
  • Climbing and Jacking continued along the climbing cage
  • Erecting the tower part (Lock Pin,
  • Balancing weight, Special strops, Adjustment devised of the trolley’s transfer rope) use of Tower crane

9- AFTER THE DESIRED HEIGHTS HAS BEEN REACHED

  • Fastening of the rope end
  • Mounting of the security rope
  • Crane adjustment and testing for operation

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