Tower cranes are cranes that are fixed to the ground with a horizontal boom that is balanced asymmetrically by a short arm carrying a counterweight and a long arm that carries the lifting gear. They have several main components including a base, mast or fixed tower, swing ring, boom, and counterweight. Tower cranes provide many benefits to construction projects by saving time, being multipurpose, and allowing for optimum utilization of resources, though they also have some disadvantages like being cumbersome to erect and dismantle and requiring skilled operators.

1. TOWER CRANES

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

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

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

15. The Base

16. Mast / Fixed Tower

17. Swing Ring

18. Boom Counter Weight

19. Erection of Boom

20. The Operator’s Cabin

21. Load Carried by the Boom Tower Crane at the Site: Maximum unsupported height - 141 feet (43 meters) Maximum reach - 164 feet (50 meters) Maximum lifting power – 6.61 tons (6 metric tons), Counterweights – 17.6 tons (16 metric tons) Sr. No. Distance from the Mast ( in meters) Load Carrying Capacity ( in Metric Tonnes) 1 10m 6 2 20m 4 3 30m 3 4 40m 2

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

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

25. STATISTICAL ANALYSIS Sr. No. PARTICULARS WITH CRANE WITH LIFTS 1 CONCRETING @ 7000 Sq.ft 10 Hr 25 Hr 2 LABOURS REQUIRED FOR 15-25 45-60 3 QUANTITY OF CONCRETE 6 Bag 1 Bag 4 R/F SHIFTING WITHIN SITE 1-1.5 Hr 8-10 Hr 5 ERECTION - DISMANTLING COST 1,00,000 25,000 6 ½ YEARLY MAINTAINANCE COST 30,000 5,000 7 WASTAGE OF CONCRETE 0.25 % 3%

26. Thank You . . .