Tower cranes inosvika panzvimbo yekuvaka pa10 kusvika ku12 tirakita-trailer rigs.Vashandi vanoshandisa nharembozha kuunganidza jib uye chikamu chemuchina, uye vanoisa nhengo dzakachinjika idzi pa40-foot (12-m) mast ine zvikamu zviviri zvemast.Iyo mobile crane inobva yawedzera counterweights.
Mast inosimuka kubva panheyo yakasimba iyi.Mast ihombe, ine triangulated retice chimiro, kazhinji 10 tsoka (3.2 metres) square.Chimiro chine mativi matatu chinopa danda simba rekuti rirambe rakati twasu.
Kuti ikwire kusvika pakureba kwayo, crane inozvikurira chikamu chimwe chete panguva!Vashandi vanoshandisa chikwiriso chepamusoro kana furemu yekukwira inoenderana pakati pechikamu chekurovera nepamusoro pedanda.Heino maitiro:
Vashandi vanorembera huremu pajib kuti vaenzanise huremu.
Vashandi vanobvisa chikwata chekuuraya kubva pamusoro pemasti.Makondohwe mahombe e hydraulic ari pamukwiri wepamusoro anosundidzira yuniti yekubaya kumusoro kwemamita makumi maviri (6 m).
Mushandi we crane anoshandisa crane kusimudza imwe 20-foot mast chikamu mumukana wakavhurwa neforemu yekukwira.Kana yangoiswa mabhaudhi panzvimbo, crane inoreba 20 feet!
Kana chivakwa chapera uye yave nguva yekuti crane iburuke, maitiro anodzoserwa kumashure - crane inobvisa mast yayo uyezve madiki crane anobvisa mamwe ese.