i形梁 meaning in English

i-beam

There are many cross - section forms such as t cross - section , i cross - section , slab cross - section , box cross - section etc . for common span of bridges . slab and box cross - section beam ' s resistance to torsion is stronger than t and i cross - section beam ' s . but deadweight of slab and box cross - section beam is bigger than it of t and i cross - section beam
现有常用跨径桥梁的截面形式多为以下几种： t形梁、 i形梁、板式截面和箱形截面等，板式截面和箱形截面与t形梁和i形梁这些开口截面相比其抗扭能力更强；但板式截面的自重要比t形梁的自重大得多。