Txawm hais tias ob qho tib si "C" - zoo li tus, lawv cov ntoo khaub lig - cov ntsiab lus thiab cov qauv tsim muaj zog sib txawv, uas cuam tshuam ncaj qha rau lawv cov load - bearing capacities thiab daim ntawv thov scopes.
Qhov hla ntawm C Channel yog akub-dov ib tug qauv. Nws lub vev xaib (qhov ntsug ntawm "C") yog tuab (feem ntau yog 6mm - 16mm), thiab cov flanges (ob sab kab rov tav) yog qhov dav thiab muaj qee qhov kev nqes hav (los pab txhawb kev kub - dov ua haujlwm). Qhov kev tsim no ua rau tus ntoo khaub lig - ntu muaj zog khoov tsis kam thiab torsional rigidity. Piv txwv li, 10 # C Channel (nrog rau qhov siab ntawm 100mm) muaj lub web thickness ntawm 5.3mm thiab flange dav ntawm 48mm, uas tuaj yeem dais qhov hnyav ntawm cov plag tsev lossis phab ntsa hauv cov qauv tseem ceeb.
C Purlin, ntawm qhov tod tes, yog tsim los ntawm txias dabtsi yog khoov ntawm daim hlau nyias. Nws tus ntoo khaub lig - ntu yog ntau "slim": lub web thickness tsuas yog 1.5mm - 4mm, thiab cov flanges yog nqaim thiab feem ntau muaj me me quav (hu ua "txhim kho tav") ntawm cov npoo. Cov ribs reinforcing no yog tsim los txhim kho lub zos stability ntawm nyias flanges thiab tiv thaiv deformation nyob rau hauv me me loads. Txawm li cas los xij, vim yog cov khoom siv nyias, tag nrho torsional tsis kam ntawm C Purlin tsis muaj zog. Piv txwv li, ib qho C160 × 60 × 20 × 2.5 C Purlin (qhov siab × flange dav × lub web qhov siab × thickness) muaj tag nrho qhov hnyav ntawm tsuas yog 5.5kg ib meter, uas yog deb tshaj li 10 # C Channel (kwv yees li 12.7kg ib meter).
