Umunara wa crane ugera ahazubakwa kumashanyarazi ya romoruki 10 kugeza 12.Abakozi bakoresha crane igendanwa kugirango bateranye jib nigice cyimashini, bagashyira abo banyamuryango batambitse kuri metero 40 (m-12) igizwe nibice bibiri.Crane igendanwa noneho yongeramo uburemere.
Mast irazamuka iva kuri uru rufatiro rukomeye.Mast ni nini nini, inyabutatu yubatswe, mubusanzwe metero kare 3.2.Imiterere ya mpandeshatu iha mast imbaraga zo gukomeza kugororoka.
Kugirango uzamuke muburebure bwacyo, crane ikura igice kimwe cya mast icyarimwe!Abakozi bakoresha umusozi wo hejuru cyangwa kuzamuka hejuru ihuza igice cyo guswera no hejuru ya mast.Dore inzira:
Abakozi bamanika uburemere kuri jib kugirango baringanize uburemere.
Abakozi batandukanije igice cyo guswera hejuru ya mast.Impfizi z'intama nini za hydraulic ziri hejuru yizamuka hejuru zisunika igice cyogosha hejuru ya metero 6.
Umukoresha wa kane akoresha crane kugirango azamure ikindi gice cya metero 20 ya mast mu cyuho cyafunguwe nikintu cyo kuzamuka.Iyo bimaze guhindurwa, crane ifite uburebure bwa metero 20!
Inyubako imaze kurangira kandi igihe kirageze ngo crane imanuke, inzira irahindurwa - crane isenya masta yayo hanyuma crane ntoya isenya izindi.