The above presentation is about telescopic crane, it's working principle and it's financial viability O&O costs.

2. Introduction
• These are truck cranes that have a self contained telescoping
boom.
• Telescoping boom contains a number of tubes fitted one
inside other.
• Can travel on public highways.
• Once the crane is leveled at the new worksite it is ready to
work without setup delays.
• If job require crane utilization for few hours to a couple of
days, telescopic crane should be given first consideration
because of it’s ease of movement.

3. Manufactures
• Porclain
• JCB
• Escorts
• ACC
• Hitachi
• Rolex
• Hyundai
• Apex
• Ace

4. Work Cycle
Loading
Elevating
Unloadin
Driving Steering
g

5. Working Principle
L L
A B
• To lift the load A, force B should be applied at equal distance
on the other end.
(B>A)

6. A
B’
L l

7. Concept in cranes
• In cranes, the force A is the load to be lifted.
• Force B is the force applied i.e. counterweight.
(counterweight also contains fixed pulley block on which the cable is wrapped)
• The pulley system delivers a force to the load that is equal to the applied force multiplied by
the length of cable (boom) between the load lifted and counterweight.
• This is known as Mechanical advantage.
• So we can say that, load lifting capacity of any crane depends on the length of the boom.

8. Specifications
Extension boom
Fixed boom
Cable
Counterweight
Hook
hydraulic
Cabin
Outrigger

9. Dimensions

10. Machinery

12. Operation cycle timing
• Boom Raising : 27 sec.
• Boom Lowering : 20 sec.
• Telescopic In : 8 sec.
• Telescopic Out : 14 sec.
• Hoist Line Speed : 52 m/min.
• Steering : 7 sec.

13. Economy
Before using or buying an equipment owner should answer two question??
1- how much does it cost to operate the machine on a project ?
2- what is the optimum economic life and the optimum manner to secure a machine ?
The reason to purchase an equipment maybe to generate profit .
• Upon deciding there are two costs associated the construction equipment
• ownership cost
• Operation cost
• Generally know as O&O costs
• Suppose $90/hr and a production of 300 tons/hr so production cost would be $90/h/300 tons /hr

14. Problem
14
Telescopic crane costs 325000 USD
service life is 15 years
Per hour ownership cost = 2.471 USD
each year it should work= 2500 hours
Yearly ownership= 2166.32 USD
Rental options
Monthly: 6500 USD
Weekly: 2500 USD
Daily : 695 USD
Rental Duration Rates Hours Rental Rate $/hr Operating hours Break
even 2166.32 point
Operating hour break
even point
6500/hr
Monthly 6500 216 30 72 -
Weekly 2500 83 30 72 216
Daily 695 23 30 72 216

15. Ownership cost
• Purchase expense
• salvage value
• tax saving from depreciation
• Major repairs and overhauls
• property taxes
• insurance
• Storage and miscellaneous

16. Operating cost
• Fuel
• Lubricant, filters and grease
• Repairs
• Tires
• Replacement of high-wear items

17. Thank you