Bir-jeexid bir ah, oo sidoo kale loo yaqaan sharoobada birta ama birta, waa xidhid furan oo biraha biraha ah, kaas oo baararka xadhkaha, ee u socda hal jiho, ay u kala fog yihiin xidhid adag si ay uga gudbaan baararka iyaga u socda ama foorarsan biraha isku xidha ee fidsan. dhexdooda, kaas oo loogu talagalay in lagu qaado culeysyo culus oo miisaankoodu yar yahay.Waxaa si weyn loo isticmaalaa sida sagxadaha, mezzanies, jaranjarooyinka, bowd, daboolida godad iyo dhufto ee dayactirka ee warshadaha, workshops, qolalka motor, channels trolley, meelaha load culus, qalabka kululeeyaha iyo meelaha qalabka culus, iwm.
