Txawm hais tias ob qho tib si steel channel thiab steel kaum yog siv hauv kev tsim kho, lawv muaj qee qhov sib txawv tseem ceeb uas ua rau lawv haum rau cov kev siv sib txawv. Lawv cov duab yog ib qho ntawm qhov sib txawv tseem ceeb ntawm ob. Cov yeeb nkab steel muaj U-shaped cross-section, thaum lub kaum sab xis steel muaj L-shaped cross-section.
Lwm qhov sib txawv tseem ceeb ntawm ob yog qhov uas lawv muab kev txhawb nqa.Hlau channelyog tsim los muab kev txhawb nqa nyob rau hauv txoj kab ntsug, thaum lub kaum sab xis steel yog tsim los muab kev txhawb nqa nyob rau hauv kab rov tav. Qhov no txhais tau hais tias cov hlau txuas tau zoo dua rau kev siv hauv tsev thav duab thiab lwm yam khoom siv thauj khoom uas xav tau kev txhawb nqa hauv txoj kev ntsug, thaum lub kaum sab xis steel zoo dua rau kev siv hauv cov qauv uas xav tau kev txhawb nqa hauv kab rov tav.
Lub thickness ntawm flanges thiab lub vev xaib kuj txawv ntawm cov hlau raws thiab cov kaum sab xis steel. Cov yeeb nkab steel feem ntau muaj cov flanges tuab thiab lub vev xaib ntau dua li cov kaum sab xis steel, uas ua rau lawv muaj zog dua thiab zoo dua rau kev siv hauv kev siv hnyav. Cov ces kaum steel, ntawm qhov tod tes, zoo li yuav muaj cov flanges thinner thiab lub vev xaib, uas ua rau lawv sib dua thiab tsim nyog siv rau hauv cov ntawv thov qhov hnyav yog qhov kev txhawj xeeb.
