I-obe
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Structural doo I-beam ASTM ọkụ akpọrepu carbon ígwè I-beam
I-beam, nke a makwaara dị ka nchara nchara, bụ igwe mpempe akwụkwọ nwere ngalaba nke nwere ụdị m.A na-ekewa I-beam ka ọ bụrụ I-beam na-ekpo ọkụ na ọkụ I-beam.Ọ bụ nchara nke ngalaba nwere ngalaba nke nwere ụdị m.
