I-Steel i beam, kungakhathaliseki ukuthi ivamile noma ilula, inosayizi wesigaba esiphambanayo esiphakeme kakhulu futhi esincane, ngakho-ke isikhathi sokungaguquguquki kwezimbazo ezimbili eziyinhloko zesigaba esiphambene sihluke kakhulu, ngakho singasetshenziswa kuphela kumalungu agobile. indiza ye-web plate yayo noma eyakhiwe ngamalungu anezinsimbi. Ayiwafanele amalungu e-axial compression noma amalungu agobe endizeni encike kuwebhu, ekhawulela ukusetshenziswa kwawo.
insimbi i ugongolo zihlukaniswa ikakhulukazi insimbi ezejwayelekile i ugongolo, insimbi ukukhanya i ugongolo futhi ububanzi flange steel i ugongolo. insimbi i-beam enama-flanges abanzi, ama-flange aphakathi nama-flange amancane ahlukaniswa ngokwesilinganiso sokuphakama kwama-flanges kuya kuma-webs. Izincazelo ezimbili zangaphambili ziyi-10-60, okungukuthi, ukuphakama okuhambisanayo kungu-10 cm-60 cm. Ekuphakameni okufanayo, insimbi ekhanyayo i-i beam ine-flange encane, iwebhu encane nesisindo esincane. insimbi i-beam ene-flange ebanzi, eyaziwa nangokuthi i-steel H beam, ibonakala ngemilenze ehambisanayo futhi akukho ukuthambekela ngaphakathi kwemilenze. Iyingxenye yensimbi yesigaba sezomnotho futhi igoqeka emshinini wokugawula osezingeni eliphezulu, ngakho ibizwa nangokuthi "i-universal steel i beam".