Tower Crane

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ABSTRACT:

Tower cranes play an integral role in construction of Mechanical engineering projects. In spite of this, tower cranes are associated with some risks Thus, any Mechanical Engineering Project has to include systems of ensuring the safety of the tower crane. Tower cranes should be managed at the sight based on the priorities given to the various project activities of the Mechanical engineering project . Because of this significant role,This discusses the application of tower cranes in the construction engineering projects .First , this examines some tower crane related accidents . This is followed by the determination of tower crane positions on site

HOW TOWER CRANES WORK ?

Tower cranes are a common fixture at any major construction site. They are pretty hard to miss. they often rise hundreds of feet into the air, and can reach out just as far. The construction crew uses the tower crane to lift steel, concrete, large tools – like acetylene torches and generators, and a wide variety of other building materials.

How can such a long boom lift so much weight? How is it able to grow taller as the building grows taller?

If you have ever wondered about how tower cranes work, then this article is for you. Here, you will find out the answers to all of these questions and more!

PARTS OF TOWERS CRANES

All tower cranes consist of the same basic parts:

1. The base is bolted to a large concrete pad that supports the crane.

2. The base connects to the mast (or tower), which gives the tower crane its height.

3. Attached to the top of the mast is the slewing unit (large ring-gear and motor) that allows the

crane to rotate.

4. Attached to the slewing unit is the jib (or boom), the machinery arm, the counterweights

5. and, the Operators Cab

ON TOP OF THE SLEWING UNIT ARE THREE PARTS:

1) The long horizontal jib (or working arm), which is the portion of the crane that carries the load. A trolley runs along the jib to move the load in and out from the crane s center:

2) The shorter horizontal machinery arm, which contains the cranes motors and electronics as well as the large concrete counterweights:

3) and, The operators cab…

SPECIFICATIONS OF COMPONENTS USED:

  1. DC GEARED MOTORS—10 AND 45 RPM, 1.2 AMP, 12VOLT WITH 4 TO 7 TORQUE
  2. RACK N PENEON GEAR— 2FEET LONG WITH .5CM TEETH SPACE
  3. AL SHEET 1X1 FEET
  4. AL ROD 16MM 1FEET
  5. MS STAND FOR CRANE
  6. AL PULLEY 14MM AL ROD
  7. SUPPORTING FREE WHEELS FOR CRANE MOVEMENT
  8. TRANSFORMER 12 0 12 VOLT, 1.2 AMP
  9. DIODE 1N4007
  10. CAPACITOR 1000MF
  11. TWO WAY TOGGLE SWITCHES
  12. WIRE

ADVANTAGES:

  • Simple calculation for torque, force and applied weight
  • runs almost silently
  • placing all materials with accuracy
  • short load charges
  • etc

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