Utu Kāniwhana Takirua 25 Tana

E whā ngā poupou o ngā kerēne takirua-piko i raro i ngā kurupae matua e rua, ka taea te hikoi tika i runga i te ara i runga i te whenua, ā, ka taea te hoahoa i ngā kurupae cantilever ki ngā pito e rua o ngā kurupae matua. Ka taea te hanga i ngā kerēne takirua-piko i hangaia e tā mātou kamupene hei momo truss, hei momo pouaka rānei e ai ki ngā hiahia o te kiritaki. He pai te āhua o te waka pouaka, he watea te hanga, he mama te truss, ā, he kaha te ātete ki te hau. Ko ngā āhuatanga o te kerēne katoa he mama, he ngāwari te hanganga, he watea te tāutanga me te tiaki, me ētahi atu. He pai mō te uta whānui, te tango me te hiki i ngā mahi i roto i ngā wheketere, ngā maina, ngā papa utanga, ngā whare putunga me ētahi atu wāhi o waho.

Ko ngā wāhanga matua o te kerēne gantry takirua ko te kerēne matua, ngā outrigger, te hiki, te hiki hiko rānei, te haere o te kāreti, te haere o te trolley, te rīra taura me ētahi atu. Kāore i rite ki ngā kerēne o runga, he outrigger ō ngā kerēne gantry, ā, ka taea te whakamahi i roto, i waho hoki. Heoi anō, he maha ngā huarahi mahi a ngā kerēne gantry. I te nuinga o te wā, he pai ngā kerēne iti-taumaha mō te whakamahi i roto, pērā i ngā kerēne gantry hanga kaipuke me ngā kerēne gantry ipu, he pai mō waho, nā te mea he taputapu hiki nui-taumaha katoa, ā, ko ngā kerēne gantry ipu te nuinga o te wā e whakamahia ana i ngā tauranga. He hanganga cantilever takirua tō tēnei kerēne gantry. Ko te taumata mahi o ngā kerēne gantry ko te A3. Engari mō ngā kerēne nui-taumaha, ka taea te whakanui ake i te taumata mahi ki te A5, ki te A6 rānei mēnā he whakaritenga motuhake ā ngā kiritaki. He teitei te whakapaunga pūngao, engari e tutuki ana hoki i ngā paerewa tiaki taiao.

Me whakatau ngā utu mō te kerēne gantry takirua kia rite ki ngā hiahia o ngā kiritaki. Ko ngā mea e pā ana ki te utu mō te kerēne gantry takirua ko ngā rauemi, te kaha hiki, te tauira taputapu me te rahinga, me ētahi atu. Mena kei te hiahia koe ki te tiki i tētahi whakatau tata i te wā e taea ai, tēnā whakapā mai ki a mātou me te kī mai i ō taipitopito. Ki te hiahia koe, ka tukuna atu e mātou he whakatau tata i roto i ngā haora 24 i muri i te whiwhinga o tō karere.