lost。Itwillhavehelpedhimtoreachthebestsolutio
i
theshortesttime
Thecheapestwayofmovi
gearthistotakeitdirectlyoutofthecuta
ddropitasfillwiththesamemachi
e。Thisis
otalwayspossible，butwhe
itca
bedo
eitisidealbei
gbothquicka
dcheapDragli
es，bulldozersa
dfaceshovelsa
dothisThelargestradiusisobtai
edwiththedragli
ea
dthelargestto
ageofearthismovedbythebulldozerthougho
lyovershortdista
cesThedisadva
tagesofthedragli
earethatitmustdigbelowitself，itca
otdigwithforcei
tocompactedmaterialitca
otdigo
steepslopws，a
ditsdumpi
ga
ddiggi
gare
otaccurate。
Faceshovelsarebetwee
bulldozersa
ddragli
es，havi
galargerradiusofactio
tha
bulldozersbutlesstha
dragli
esTheyarea
letodigi
toaverticalclifffacei
awaywhichwouldbeda
geroustorabulldozeroperatora
dimpossibleforadragli
e。Eachpieceofequipme
tshouldbeleveloftheirtracksa
dfordeepdigsi
compactmaterialabackacterismostusefulbutitsdumpi
gradiusisco
siderablylesstha
thatofthesameescavatorfittedwithafaceshovel
Rubbertyredbowlscrapersarei
dispe
sableforfairlyleveldiggi
gwherethedista
ceoftra
sportistoomuchtoradragli
eorfaceshovel。Theyca
digthematerialdeeply（buto
lybelowthemselves）toafairlyflatsurface，carryithu
dredsofmetersif
eedbe，the
dropita
dlevelitroughlyduri
gthedumpi
g。Forharddiggi
gitisofte
fou
deco
omicaltokeepapushertractorwheeledortrackedo
thediggi
gsitetopusheachscraperasitretur
stodigAssoo
asthescraperisfull，thepushertractorretur
stothebegi
i
gofthedigtoheoptohelpthe
estscraper
8
fBowlscrapersareofte
extremelypowerfulmachi
es；ma
ymakersbuildscrapersof8cubicmetersstruckcapacitywhichcarry10mheaped。Thelargestselfpropelledscrapersareof19mstruckcapacity（25mheaped）a
dtheyaredrive
byatractore
gi
eof430horsepowers
Dumpersareprobablythecommo
estrubbertyredtra
sportsi
cetheyca
alsoco
ve
ie
tlybeusedforcarryi
gco
creteorotherbuildi
gmaterialsDumpershavetheearthco
tai
eroverthefro
taxleo
largerubbertyredwheels，a
dtheco
tai
ertipsforwardso
mosttypes，thoughi
articulateddumpersthedirectio
oftipca
bewidelyvariedThesmallestdumpershaveacapacityofabout0。5m，a
dthelargeststa
dardtypesareofabout4。5mSpecialtypesi
cludetheselfloadi
gdumperofupto4ma
dthearticulatedtypeofabout05m。Thedisti
ctio
betwee
dumpersa
ddumptrucksmustberemembereddumperstipforwardsa
dthedriversitsbehi
dtheload。Dumptrucksareheavy，stre
gthe
edtippi
glorriesthedrivertravelsi
fro
tlftheloada
dtheloadisdumpedbehi
dhimsotheyaresometimescalledreardumptrucks。
2r