Intshayelelo yemveliso
I-Bailey Bridge Rock: isetyenziselwa ukulawula icala le-truss tyhala ngaphandle kwaye ithwale ubunzima bebhulorho. Intsimbi ye-shim ye-semi-crescent ihlelwe phantsi kwayo, ekulungele ukuxhaswa kwi-axle beam yesihlalo sebhulorho. Ilitye liyakwazi ukujinga phezulu nasezantsi ngokukhululekileyo. Kukho iirola ezincinci ezi-4 kumacala omabini. Xa utyhala kwaye utsala ubude bebhulorho, i-chord esezantsi ye-truss isoloko ilawulwa kumbindi welitye ukuqinisekisa icala lokutyhala kunye nokutsalwa kwebhulorho. I-Rock kunye ne-roll kufuneka imiswe kumacala omabini e-strait. Ilitye linobunzima beekhilogram ezili-102 kunye nomthamo omkhulu wokuthwala umthwalo ngu-250 kN.
Isicelo
Ithambeka elithe nkqo lendawo edityanisiweyo akufuneki libe likhulu kune-3%, kwaye ithambeka elithe tyaba kufuneka libe lithe tye. Beka i-roller kwindawo ye-roller calibrated, kwaye i-tray yesampuli kufuneka ifakwe ngaphantsi. Ilitye ngalinye livumela umqolo omnye wetrasi ukuba udlule. Xa kwakhiwa ibhulorho enomqolo omnye, kubekwa iirocker ezimbini kwibhanki nganye; xa kwakhiwa iibhulorho ezinemiqolo emibini kunye nemiqolo emithathu, iiroki ezine zibekwe kwibhanki nganye. Xa utyhala imiqolo emithathu yeebhulorho, ukwenzela ukuba ugweme ukuthintela ukuhamba kakuhle komqolo wangaphandle we-trusses, ii-roller zangaphandle phantsi komqolo ophakathi kufuneka zisuswe. Umgama phakathi kwelitye kunye nepleyiti yokuxhasa malunga ne-1.0 m, kwaye ubuncinci ungabi ngaphantsi kwe-0.75 m. Ipleyiti yokuhlala ibekwe kwindawo ye-axis yepleyiti yokuhlala. Kuba umgangatho webhulorho ungama-79 cm ukuphakama kunomgangatho ongezantsi wepleyiti yokuhlala, indawo yepleyiti yokuhlala kufuneka igrunjwe ngokufanelekileyo ukunciphisa ukuphakama kwedekhi yebhulorho. Ngokuqhelekileyo, umehluko wobude phakathi kwedekhi yebhulorho kunye nomgangatho wendlela akufanele udlule i-30 cm.
