TOWER CRANES

TOPICS INTRODUCTION INTRODUCTION TYPES OF CRANES TYPES OF CRANES DIFFERENT COMPONENTS OF CRANE DIFFERENT COMPONENTS OF CRANE ERECTION PROCEDURE ERECTION PROCEDURE UTILITY TO PROJECT / SITE UTILITY TO PROJECT / SITE DISADVANTAGES DISADVANTAGES STATISTICAL ANALYSIS STATISTICAL ANALYSIS CONCLUSION & CONSENSUS CONCLUSION & CONSENSUS

What Are Tower Cranes? A crane is a tower or derrick equipped with cables and pulleys that is used to lift and lower materials. A crane is a tower or derrick equipped with cables and pulleys that is used to lift and lower materials. Ancient Crane Ancient Crane Mobile Crane Mobile Crane Telescopic Crane Telescopic Crane Tower Crane Tower Crane Loader Crane Loader Crane Stacker Crane Stacker Crane Gantry Crane Gantry Crane Overhead Crane Overhead Crane

Tower Cranes Fixed to the ground Fixed to the ground Horizontal boom is balanced asymmetrically Horizontal boom is balanced asymmetrically Short arm carries a counterweight of concrete blocks Short arm carries a counterweight of concrete blocks Long arm carries the lifting gear Long arm carries the lifting gear

The Base

Mast / Fixed Tower

Swing Ring

Boom Counter Weight

Erection of Boom

The Operator’s Cabin

Load Carried by the Boom Sr. No. Distance from the Mast ( in meters) Load Carrying Capacity ( in Metric Tonnes) 110m6 220m4 330m3 440m2 Tower Crane at the Site: Maximum unsupported height feet (43 meters) Maximum reach feet (50 meters) Maximum lifting power – 6.61 tons (6 metric tons), Counterweights – 17.6 tons (16 metric tons)

TIME SAVING MACHINE TIME SAVING MACHINE MULTIPURPOSE IN USE MULTIPURPOSE IN USE HEAVY DUTY HEAVY DUTY HIGH PERFORMANCE HIGH PERFORMANCE EASE EVEN IN CRITICAL SITUATION EASE EVEN IN CRITICAL SITUATION CAN BE TRANSFERRED FROM ONE PROJECT TO ANOTHER CAN BE TRANSFERRED FROM ONE PROJECT TO ANOTHER WHEN IDLE, NO OVERHEADS WHEN IDLE, NO OVERHEADS OPTIMUM UTILISATION OF RESOURCES OPTIMUM UTILISATION OF RESOURCES UTILITY TO PROJECT

DISADVANTAGES CUMBERSOME TO ERECT & DISMANTLE. CUMBERSOME TO ERECT & DISMANTLE. HIGH INITIAL COST FOR ERECTION AS WELL AS DISMANTLING. HIGH INITIAL COST FOR ERECTION AS WELL AS DISMANTLING. SKILLED OPERATORS ARE REQUIRED. SKILLED OPERATORS ARE REQUIRED. IF IN DEFECTIVE SESSION, HAMPERS THE SCHEDULE. IF IN DEFECTIVE SESSION, HAMPERS THE SCHEDULE. MAINTANANCE IS DIFFICULT. MAINTANANCE IS DIFFICULT. SOMETIMES CREATE SAFETY PROBLEMS. SOMETIMES CREATE SAFETY PROBLEMS. LIMITED TO PROJECTS WITH LARGE AREAS. LIMITED TO PROJECTS WITH LARGE AREAS.

STATISTICAL ANALYSIS Sr.No.PARTICULARS WITH CRANE WITH LIFTS 7000 Sq.ft 10 Hr 25 Hr 2LABOURS REQUIRED FOR QUANTITY OF CONCRETE 6 Bag 1 Bag 4R/F SHIFTING WITHIN SITE Hr 8-10 Hr 5ERECTION - DISMANTLING COST1,00,00025,000 6½ YEARLY MAINTAINANCE COST30,0005,000 7WASTAGE OF CONCRETE 0.25 % 3%

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