Kunyangwe ese ari maviri "C" - akaumbwa, iwo muchinjiko - chikamu chechikamu uye kusimba kwemaitiro akasiyana, ayo anokanganisa zvakananga mutoro wavo - kutakura masimba uye zviyero zvekushandisa.

Muchinjikwa-chikamu cheC Channel ndeyeinopisa - yakakungurutswa yakakosha chimiro. Dandemutande rayo (chikamu chakamira che "C") chakakora (kazhinji 6mm - 16mm), uye maflange (mativi maviri akachinjika) akafara uye ane kumwe kutsetseka (kufambisa kupisa - rolling process). Iyi dhizaini inoita kuti muchinjiko - chikamu ive yakasimba kukotama kuramba uye torsional rigidity. Semuyenzaniso, 10# C Channel (ine hurefu hwe100mm) ine dandemutande ukobvu hwe5.3mm uye flange hupamhi hwe 48mm, iyo inogona kutakura nyore huremu hwepasi kana madziro muchivako chikuru.

C Purlin, kune rumwe rutivi, inoumbwa nekukotama kunotonhora kwemahwendefa matete esimbi. Muchinjikwa waro - chikamu chakanyanya "slim": kukora kwewebhu kunongova 1.5mm - 4mm, uye maflange akamanikana uye kazhinji ane mapete madiki (anonzi "kusimbisa mbabvu") pamipendero. Idzi mbabvu dzinosimbisa dzakagadzirirwa kuvandudza kugadzikana kwenzvimbo kweiyo yakaonda flanges uye kudzivirira deformation pasi pemitoro midiki. Nekudaro, nekuda kweiyo yakatetepa zvinhu, iyo yakazara torsional kuramba yeC Purlin haina kusimba. Semuenzaniso, yakajairika C160 × 60 × 20 × 2.5 C Purlin (kureba × flange upamhi × web kureba × ukobvu) ine huremu hwese hunosvika 5.5kg pamita imwe chete, iyo iri kureruka kupfuura 10# C Channel (inenge 12.7kg pamita).