Double girderka holimoli-cranesli etselitsoe ho phahamisa thepa e boima ea lithane tse fetang 20. Ka hona, girder habelika holimoli-cranes li ka boela tsa bitsoa li-cranes tsa borokho bo boima. Li-crane tse holim'a li-girder tse peli li ka etsoa ka mefuta e fapaneng ea litlhophiso tsa crane tse mathang holimo, ho kenyeletsoa li-hoist trolleys le li-winch tse bulehileng, tse nang le mefuta e fapaneng ea li-attachments tsa crane le lisebelisoa tsa ho phahamisa lihuku tse kang li-grabs, tongs, magnets, cranes, joalo-joalo. lisebelisoa tse nang le maballo, li-hook tse nang le sebōpeho sa C kapa mekhoa e meng e sebelisoang ho sebetsana le lintho tse boima, tse nang le litšobotsi tsa tšireletso e phahameng, ho tšepahala ho phahameng le ho tšoarella.
Boima ba mojaro hangata ke lebaka le ka sehloohong la ho khetha ahabelihlaka crane e ka hodimo. Double girder overhead cranes ke litšenyehelo le sebaka tharollo ea ho pholosa haeba meroalo e fetang lithane tse 15 e hloka ho phahamisoa ka nako e sa feleng ea mosebetsi.
Bophahamo bo ntlafalitsoeng ba hook. Habediborokho ba beam li-cranes li na le trolley e tsamaeang ka holim'a borokho, kahoo e eketsa bophahamo ba hook. Sena se nolofalletsa opareitara ho phahamisa lintho tse telele le tse telele le lisebelisoa ka har'a sebaka sa mosebetsi ha ho bapisoa le crane e le 'ngoe ea girder e nang le underfanyehiloe trolley le hoist.
Ho na le li-hoists tse thusang holim'a sethala se seng le se seng. Li-cranes tse ling li ka eketsoa ho girder e le 'ngoe ho eketsa lintlha tse ngata tsa ho phahamisa holim'a crane. Li-cranes tsena li khona ho pota-pota hobane ha li holim'a leballo le le leng.
Ho pholletsa le libaka tse telele.TheCrane ea lithane tse 20 ka holimoe ka boela ea nka sebaka se selelele hobane moralo oa parallel-girder o na le matla a akaretsang ho feta moralo oa girder e le 'ngoe.
Tshebetso e matla. Ts'ebetso e phahameng haholo ka lebaka la moralo oa li-double girder bakeng sa lebelo le phahameng le ho feta. Haholo-holo bophahamo bo phahameng ba ho phahamisa, kaha hook ea mojaro e ka phahamisoa lipakeng tsa li-crane girders tse peli.
SenaCrane ea lithane tse 20 ka holimoe tla jara meroalo e boima habonolo le boima bo boima ho feta20 lithane. Hase sena feela, se sebetsa ka mokhoa o atlehileng esita le ka lebelo le phahameng.Re na le li-cranes tse holimo tse peli tsa girder tse fumanehang ka boholo bo fapaneng le litlhaloso tse tla lumellana le morero oa hau ka katleho le ka katleho.
