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 Mr. Nilesh D. Chinchore  Int. Journal of Engineering Research and Applications www.ijera.com ISSN : 224!"#22$ %ol. 4$ Issue &2' (art &)$ Dece*+er 2,&4$ pp.2"!-&

From Paper :

Planning and Selection of Heavy Construction Equipment in Civil Engineering

V. COMMON FC!O"S FFEC!#N$ SE%EC!#ON OF E&'#PMEN!Every equipment has certain factors those are in common and which are taken into considerationwhile selecting equipment. They are listed as follows-

• Scope of (or) to *e carried out- since the

first concern is getting the jo done! thetime frame within which the work is

required to e carried out! the specification

of work and the methodology adopted will

 e of primary concern

• 'se of availa*le- for a work where full

utili"ation of new equipment for its entireworking life is not foreseen and its

utili"ation on

• Furt+er pro,ect is uncertain it may *e

desira*le to utili-e eisting old equipment

even t+oug+ its operation (ould *e

some(+at more epensive. The deprecation

cost of new machine is likely to e high and

this would rise the owing cost of the

machine and consequently unit cost of work. Economic should e worked out.

Suita*ility for ,o* conditions/the equipment

selected should suit the demands of the jo

conditions. #limate of region and workingconditions should e kept in view while

selecting the type of equipment.

• 'niformity in type- it is desirale to have

minimum numer of types so that there is

uniformity in the type of equipment on a

 project. $t is desirale to select common

type of engine for different machine such ase%cavators! dump trucks! tractor and

scrapers purchased on the projects.

• Si-e of equipment 0/ while large si"e of 

machines are capale of giving largeoutputs on full load! the cost of production

is usually greater than that of smaller unitsif worked out on part loads. &arge si"e of 

equipment requires corresponding largesi"e of matching equipment. 'nd shutting

down of one primary unit may result in

making several other equipment idle.

Transportation and shipment are usuallydifficult and e%pensive. (owever large

equipment)s are more study and suitale for 

tough working conditions. $t is also

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desirale to have equipment of same si"e

on the project. $f there are standys the cost

of smaller equipment as standy may e

less that of larger si"e of equipment.

• 'se of standard Equipments 0/ standard

equipments are commonly manufactured

and are commonly availale and aremoderately priced. The spare parts of 

standard equipment are easily availale and

less e%pensive. 'fter the work is over! it is

generally easier to dispose of standardequipment.

• 'nit cost production :- the economics is

one of the most important considerations in

selection of equipment. *hile working outowing cost all items of e%penses! such as

freight! packaging and forwarding!

insurance! erection and commissioning etc.

should e included with the price paid tosupplier.

• 

Country of origin :- when imports are

unavoidale! it is preferale to import from

a soft currency than from a hard currency

area! if equipment quality is availale.

• vaila*ility of spare parts :- +own time for 

want of necessary spare parts commonly

accounts for long idle periods duringworking life of equipment! especially of 

imported equipment. 'vailaility of spare

 parts at reasonale cost during the entire

working life should e assured whileselecting a particular type of equipment.

•

 

Versatility , the equipment selected should e if possile! e capale of performingmore than one function and should have

feature of inter convertiility as far as

 possile.

• Selection of manufacturer: - it is desirale

to have equipment of the same

manufacturer on a project as far as possile

and to have minimum numer of different

makes of equipment. The quality of localdealers is also important.

• Suita*ility of local la*or :- availale

operators and technicians should e ale to

handle selected equipment.• !ec+nical consideration :- the efficient

 performance of any piece of equipment

and its service life are conditioned yfollowing factors :

a. trength

 . igidity

c. /iration stailityd. esistance to wear 

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e. (eat resistance

f. eliaility

g. 0aintainaility

' alance etween reliaility! investment cost andoperating cost should e found since a policy of 

selecting the lowest priced equipment can often lead

to higher life cycle costs.