Call Toll Free - 888-670-1195
2018 Skyjack SJ1056 Image
Stock Number: EQC012374
Make: Skyjack
Model: SJ1056
Year: 2018
2018 Skyjack SJ1056 Details
2015 Terex CTT 121A-5 TS16 Image
Stock Number: 600017
Make: Terex
Model: CTT 121A-5 TS16
Year: 2015
2015 Terex CTT 121A-5 TS16 Details
2007 Potain HDT80 Image
Stock Number: 600194
Make: Potain
Model: HDT80
Year: 2007
2007 Potain HDT80 Details
2013 Hyundai 110D-7E Image
Stock Number: EQU010604
Make: Hyundai
Model: 110D-7E
Year: 2013
2013 Hyundai 110D-7E Details
2012 Miller Big Blue 400D Image
Stock Number: 231276
Make: Miller
Model: Big Blue 400D
Year: 2012
2012 Miller Big Blue 400D Details
2008 Combilift C12000SL Image
Stock Number: EQU008108
Make: Combilift
Model: C12000SL
Year: 2008
2008 Combilift C12000SL Details
 
Comedil Self Erect Cranes

Comedil Self Erect Cranes

Usually the base which is bolted into a huge concrete pad provides the necessary support for a tower crane. The base is connected to a tower or a mast and stabilizes the crane which is attached to the inside of the structure of the building. Usually, this attachment point is to a concrete lift or to an elevator shaft.

The crane's mast is often a triangulated lattice structure which measures 10 feet square or 0.9m2. Connected to the very top of the mast is the slewing unit. The slewing unit consists of a motor and a gear which enable the crane to rotate.

Tower cranes may have a max unsupported height of 80m or 265 feet, while the tower crane's maximum lifting capacity is 16,642 kg or 39,690 pounds with counter weights of 20 tons. In addition, two limit switches are utilized in order to ensure the operator does not overload the crane. There is also another safety feature called a load moment switch to ensure that the operator does not surpass the ton meter load rating. Lastly, the tower crane has a maximum reach of 70 meters or 230 feet.

Due to their extreme heights, there is a science involved to erecting a crane. The stationary structure will first have to be brought to the construction location by utilizing a large tractor-trailer rig setup. Next, a mobile crane is used in order to assemble the machine portion of the crane and the jib. These parts are then connected to the mast. The mobile crane then adds counterweights. Forklifts and crawler cranes may be some of the other industrial machinery which is used to erect a crane.

When the building is erected, mast extensions are added to the crane. This is how the crane's height is able to match the building's height. The crane crew utilizes what is called a climbing frame or a top climber that fits between the top of the mast and the slewing unit. A weight is hung on the jib by the work crew so as to balance the counterweight. Once complete, the slewing unit is able to detach from the top of the mast. In the top climber, hydraulic rams are utilized to adjust the slewing unit up an extra 6.1m or 20 feet. Then, the operator of the crane uses the crane to insert and bolt into place one more mast section piece.

  • Nissan Outdoor Forklifts
    You'll find few pieces of heavy machinery which are as valuable or effective as a forklift for companies and businesses which have to move heavy materials and items. Forklifts are a popular site in distribution... More
  • Toyota Narrow Aisle Forklift
    Very Narrow Aisle Because the economy is easing and employment is on the rise, the stock market is showing promising signs of strength and consumers are feeling better overall. Most indicators are pointing towards economic... More
  • TCM Dual Fuel Forklifts
    Safety using a lift truck needs to be a top priority if you are going to operate a lift truck or would employ somebody to operate a forklift. Just a single forklift injury to an... More
  • Caterpillar Loaded Container Handlers
    Internal combustion counterbalanced lift trucks Internal combustion engine trucks are fueled by gasoline, liquid propane, compressed natural gas or diesel. Gasoline- or diesel-powered lift trucks are normally large trucks utilized outdoors. They have either cushion... More
  • Mitsubishi Counterbalance Forklifts
    Workplace injuries and accidents on construction sites unfortunately occur more often than anybody would prefer. Based on statistics, a lot of these mishaps occur because of inadequate or wholly absent protocols and safety training. A... More