I-BEAM

I-beams (also known as double-T esp. in Polish and German) are beams with an I- or H-shaped cross-section. The horizontal elements are flanges, while the vertical element is the web. The Euler-Bernoulli beam equation shows that this is a very efficient form for carrying both bending and shear in the plane of the web. The cross-section has a reduced capacity in the transverse direction, and is also inefficient in carrying torsion, for which hollow structural sections are often preferred.
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Noun
1. girder having a cross section resembling the letter `I'
(hypernym) girder

i-beam /'aibi:m/
danh từ (kỹ thuật) rầm chữ I
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