Chii chinonzi Double Girder Bridge Crane?

A Crane yebhiriji reGirder mbiriimhando yekrini yepamusoro ine magirders maviri akafanana (horizontal beams) anotsigira sisitimu yekusimudza netrolley yekrini. Dhizaini iyi inopa mabhenefiti akati wandei, zvichiita kuti ikodzere kushandiswa mumaindasitiri akasiyana-siyana. Heano mamwe maitiro akakosha nemabhenefiti:

Zvinhu Zvikuru:
Maumbirwo:

Magidhi maviri: Dhizaini yemagidhi maviri inobvumira kureba kwakafara uye kugona kukuru kwekusimudza zvichienzaniswa nemakirini egidhi rimwe chete.
Sisitimu yeTrolley: Chikwidzo chinofamba nepamagirders, zvichibvumira kusimudza kwakatwasuka uye kufamba kwakatwasuka.
Kukwanisa Kusimudza:

Kazhinji, makireni maviri egirder anogona kutakura zvinhu zvinorema, kazhinji zvichipfuura kugona kwemakireni egirder rimwe chete.
Kureba:

Dhizaini iyi inobvumira nzvimbo yakakura yemusoro, iyo inobatsira pakusimudza zvinhu zvakareba kana kuti pamabasa anoda nzvimbo yakatwasuka.
Kuchinja-chinja:

Dzinogona kupfekedzwa nezvikwiriso zvakasiyana-siyana, zvichiita kuti dzikwanise kushandiswa mumhando dzakasiyana dzezvinhu uye mashandisirwo adzo.
Kugadzikana:

Kugadzika kwegirder mbiri kunoita kuti pave nekugadzikana uye kuomarara, zvichideredza kutenderera uye zvichivandudza kuchengetedzeka panguva yekushanda.
Mashandisirwo:
Macrane ebhiriji ane magirder maviri anowanzo shandiswa mu:

Zvivako zvekugadzira
Matura ekuchengetera zvinhu
Nzvimbo dzekutumira nekugamuchira
Zvigayo zvesimbi
Nzvimbo dzekuvaka
Mhedziso:
Kazhinji, macrane ebhiriji maviri anobatsira zvikuru uye anokwanisa kushandiswa pakutakura zvinhu zvinorema uye kugadzirisa zvinhu munzvimbo dzakasiyana-siyana dzemaindasitiri, zvichipa kugona kwakasimba, kugadzikana, uye kushanda zvakanaka.