Nangona zombini zimile okwe-"C", iinkcukacha zazo ezinqamlezileyo kunye namandla azo olwakhiwo zahlukile kakhulu, nto leyo echaphazela ngokuthe ngqo amandla azo okuthwala umthwalo kunye nezikopu zokusetyenziswa.
Icandelo elinqamlezileyo leC Channel liyiisakhiwo esihlanganisiweyo esishushu nesijikelezileyo. I-web yayo (inxalenye ethe nkqo ye-"C") ityebile (ngesiqhelo yi-6mm - 16mm), kwaye ii-flanges (amacala amabini atyebileyo) zibanzi kwaye zinethambeka elithile (ukulungiselela ukuqengqeleka okushushu). Olu yilo lwenza ukuba i-cross-section ibe nokumelana okunamandla kokugoba kunye nokuqina kwe-torsional. Umzekelo, i-10# C Channel (enokuphakama kwe-100mm) inobukhulu be-web obuyi-5.3mm kunye nobubanzi be-flange obuyi-48mm, obunokuthwala ngokulula ubunzima bemigangatho okanye iindonga kwisakhiwo esiphambili.
Kwelinye icala, i-C Purlin yenziwe ngokugoba okubandayo kweepleyiti zentsimbi ezibhityileyo. Icandelo layo elinqamlezileyo "lincinci" ngakumbi: ubukhulu bewebhu yi-1.5mm - 4mm kuphela, kwaye iiflanges zincinci kwaye zihlala zinemiphetho emincinci (ebizwa ngokuba "ziimbambo zokuqinisa") emaphethelweni. Ezi mbambo zokuqinisa zenzelwe ukuphucula uzinzo lwendawo yeeflanges ezibhityileyo kunye nokuthintela ukuguquka phantsi kwemithwalo emincinci. Nangona kunjalo, ngenxa yezinto ezibhityileyo, ukumelana nokujika kwe-C Purlin kubuthathaka. Umzekelo, i-C160×60×20×2.5 C Purlin eqhelekileyo (ubude × ububanzi beflange × ukuphakama kwewebhu × ubukhulu) inobunzima obupheleleyo obumalunga ne-5.5kg ngemitha, obukhaphukhaphu kakhulu kune-10# C Channel (malunga ne-12.7kg ngemitha).