[栋梁 / 棟樑, dòng liángㄉㄨㄥˋ ㄌㄧㄤˊ] ridgepole; ridgepole and beams; person able to bear heavy responsibility; mainstay (of organization); pillar (of state)#37726
[逼上梁山 / 逼上樑山, bī shàng liáng shānㄅㄧ ㄕㄤˋ ㄌㄧㄤˊ ㄕㄢ] be driven to join the Liangshan Mountain rebels; be driven to revolt; be forced to do something desperate#71967
...public works contractor When I return home, I'll build bridges, highways and dams which can gather the water and to become benefactor of my country.