Duk da cewa duka suna da siffar "C", cikakkun bayanai na sassansu da ƙarfin tsarinsu sun bambanta sosai, wanda ke shafar ƙarfin ɗaukar nauyinsu da kuma iyakokin aikace-aikacensu kai tsaye.
Sashen giciye na C Channel shineTsarin haɗin kai mai zafi da aka birgimaSaƙarsa (ɓangaren tsaye na "C") tana da kauri (yawanci 6mm - 16mm), kuma flanges (gefen kwance biyu) suna da faɗi kuma suna da wani gangare (don sauƙaƙe sarrafa birgima mai zafi). Wannan ƙira tana sa ɓangaren giciye yana da juriya mai ƙarfi da kuma taurin juyawa. Misali, Tashar C mai tsawon 10# (mai tsayin 100mm) tana da kauri na yanar gizo na 5.3mm da faɗin flange na 48mm, wanda zai iya ɗaukar nauyin benaye ko bango cikin sauƙi a cikin babban ginin.
A gefe guda kuma, C Purlin yana samuwa ne ta hanyar lanƙwasawa da sanyi na faranti na ƙarfe masu siriri. Sashensa na giciye ya fi "raƙumi": kauri na yanar gizo shine 1.5mm - 4mm kawai, kuma flanges ɗin suna da kunkuntar kuma galibi suna da ƙananan naɗewa (wanda ake kira "ƙarfafa haƙarƙari") a gefuna. Waɗannan haƙarƙari masu ƙarfafawa an tsara su ne don inganta kwanciyar hankali na ƙananan flanges na gida da kuma hana nakasawa a ƙarƙashin ƙananan kaya. Duk da haka, saboda siraran kayan, juriyar juyawa gaba ɗaya na C Purlin ba ta da ƙarfi. Misali, Purlin na yau da kullun na C160×60×20×2.5 C (tsawo × faɗin flange × tsayin yanar gizo × kauri) yana da jimillar nauyin kusan 5.5kg kawai a kowace mita, wanda ya fi sauƙi fiye da Tashar C 10# (kimanin 12.7kg a kowace mita).