一种定义
四种语言
0,1,2
- 德國
- 英語
- 中國
- 西班牙語
轧钢工字梁（剖面图） (n)
I-Träger (Profile) (m)
I-beam (n)
In the case of cranes, I-beams are often used directly as the runway for under-running trolleys.
In structures comprising I-beams, connections must have non-positive joints.
I-beams (double-T beams) are often used as structural elements in supporting structures.
