I Beam, also known as Universal Beam, is a long strip of steel with an i-shaped section.Hot – rolled I – beam and light – weight I – beam.It is a section steel whose section shape is i-shaped.
Common beams and light beams of the wing root to the edge thinning, has a certain Angle, ordinary beams and light beams on the number of models is to use its high waist centimeters of Arabic numerals, web plate, the thickness of the flange and flange width different specifications to waist high (h) * waist thick legs wide (b) (d) said the number of blessings, such as “sewing worker 160 x 88 x 6”, it indicates that the waist high is 160 mm, width is 88 millimeter, the leg with a thickness of 6 mm ordinary beams.
| Model No. | Specification（mm） | Theoretical weight （kg/m） |
| 10# | 100*68*4.5 | 11.261 |
| 12# | 120*75*5.0 | 13.987 |
| 14# | 140*80*5.5 | 16.89 |
| 16# | 160*88*5.5 | 20.513 |
| 18# | 180*94*6.5 | 24.143 |
| 20#A | 200*100*7.0 | 27.929 |
| 20#B | 200*102*9.0 | 31.069 |
| 22#A | 220*110*7.5 | 33.07 |
| 22#B | 220*112*9.5 | 36.542 |
| 25#A | 250*116*8.0 | 38.105 |
| 25#B | 250*118*10.0 | 42.03 |
| 28#A | 280*122*8.5 | 43.492 |
| 28#B | 280*124*10.5 | 47.888 |
