(1) Kev sib txuas ntawm node yog tsim rau kev sib txuas ncaj qha, thiab nws tsis tas yuav dhau los ntawm lub phaj ntawm lub phaj lossis lwm qhov txuas, uas txuag kev ua haujlwm thiab cov khoom siv.

(2) Thaum tsim nyog, pob zeb tuaj yeem nchuav rau hauv cov yeeb nkab los tsim cov khoom sib xyaw.

(3) Cov yam ntxwv geometric ntawm cov yeeb nkab seem yog qhov zoo, cov yeeb nkab phab ntsa feem ntau nyias, cov khoom ntawm cov seem yog faib nyob ib ncig ntawm lub centroid, lub vojvoog ntawm gyration ntawm seem yog loj, thiab nws muaj zog torsional rigidity;Raws li compression, compression, thiab bidirectional dabtsi yog khoov tivthaiv, nws cov kabmob muaj peev xwm yog siab dua, thiab qhov ncaj ntawm cov kav dej txias thiab qhov tseeb ntawm qhov sib txawv ntawm qhov ntev yog zoo dua li cov kub-khoov qhib hla ntu.

(4) Lub ntsej muag zoo nkauj dua, tshwj xeeb tshaj yog cov yeeb nkab truss tsim los ntawm cov yeeb nkab steel, tsis muaj kev sib txuas ntxiv, thiab cov kev xav niaj hnub no muaj zog.

(5) Nyob rau hauv cov ntsiab lus ntawm cov yam ntxwv los tiv thaiv hydrodynamic, qhov cross-section ntawm round raj yog zoo dua, thiab cov nyhuv ntawm cua thiab dej ntws yog heev txo.Lub raj lub voj voos zoo ib yam li lwm qhov qhib seem hauv qhov kev hwm no.

(6) Cov kav hlau loj loj tau kaw ntu ntu;Thaum qhov nruab nrab tuab thiab qhov chaw hla ntu yog tib yam, qhov chaw ntawm qhov chaw raug yog li 50% mus rau 60% ntawm qhov qhib ntu ntu, uas yog qhov zoo rau kev tiv thaiv corrosion thiab tuaj yeem txuag cov ntaub ntawv txheej.