07 Jul Box Culvert construction – Drainage DA Da Nang admin2018-05-09T14:43:44+07:00 By admin INFRASTRUCTURE PROJECTS, TYPICAL PROJECT 1 Comment Scale works: – Dig ditches, intubation, 10,000 road construction – Supply and installation of cast iron pipes D600 = 281m; D500 = 6.098m – Supply and installation of reinforced concrete pipes D400 = 5.425m – Installation B = 1.2 m box culvert;