Ọ bụ ezie na ha abụọ nwere ọdịdị "C", nkọwa akụkụ ha na ike nhazi ha dị nnọọ iche, nke na-emetụta ikike ibu ibu ha na oke ngwa ha.
Akụkụ obe nke C Channel bụỌdịdị dị n'ime ọkụ - nke a kpụrụ akpụ. Ntutu isi ya (akụkụ kwụ ọtọ nke "C") dị oke (na-abụkarị 6mm - 16mm), flanges (akụkụ abụọ kwụ ọtọ) dịkwa obosara ma nwee obere mkpọda (iji mee ka nhazi ọkụ na-agbagharị). Nhazi a na-eme ka akụkụ obe ahụ nwee ike iguzogide mgbagọ siri ike na ike torsional. Dịka ọmụmaatụ, ọwa 10# C (nke nwere elu 100mm) nwere ọkpụrụkpụ weebụ nke 5.3mm na obosara flange nke 48mm, nke nwere ike ibu ibu nke ala ma ọ bụ mgbidi n'ime ụlọ bụ isi.
N'aka nke ọzọ, a na-akpụ C Purlin site na iji mgbagọ oyi nke efere ígwè dị gịrịgịrị. Akụkụ obe ya dị "mkpụmkpụ" karịa: ọkpụrụkpụ weebụ ahụ bụ naanị 1.5mm - 4mm, flanges ndị ahụ dịkwa warara ma na-enwekarị obere mpịachi (a na-akpọ "ribs na-eme ka ọ sie ike") n'akụkụ ya. E mere rib ndị a iji melite nkwụsi ike mpaghara nke flanges dị gịrịgịrị ma gbochie mgbanwe n'okpuru obere ibu. Agbanyeghị, n'ihi ihe dị gịrịgịrị, nguzogide torsional zuru oke nke C Purlin adịghị ike. Dịka ọmụmaatụ, Purlin nkịtị nke C160×60×20×2.5 C (ogologo × obosara flange × elu weebụ × ọkpụrụkpụ) nwere mkpokọta ibu nke naanị ihe dị ka 5.5kg kwa mita, nke dị mfe karịa 10# C Channel (ihe dị ka 12.7kg kwa mita).