Custom I-mtengo

Kufotokozera Kwachidule:

I-beam, yomwe imadziwikanso kuti universal beam, ndi chingwe chachitali chachitsulo chokhala ndi gawo lokhala ngati I.I-beam imagawidwa kukhala I-mtengo wotentha komanso wopepuka wa I-mtengo.Ndi gawo lachitsulo chokhala ndi mawonekedwe a gawo la I.