4.1 Cast a 75mm thick blinding layer at the corresponding final excavation level after inspected and accepted with Engineer.4.2 Setting out alignment and level. 4.3 Erecting vertical formwork according to the formwork design ( separate submitted )4.4 Fixing the reinforcement bars according to the latest BD approved drawing.4.5 Checking the dimension , alignment, steel and the final condition will be inspected with Engineer.4.6 Cast concrete by backhoe, or concrete pump or skip with mobile crane method.4.7 The retarder agent ( separate submitted ) will be applied on the horizontal C.J. location, the high water jet will be used to clean the loosen materials to form sound concrete construction joint location.4.8 The Vertical construction joint location will be used the High Rid ( separate submitted ) instead of plywood, the loosen materials or cement mortar will be cleaned with high pressure water jet on next day.4.9 The plastic sheet will be covered on the concrete surface for concrete curing on next day.4.10 Remove formwork after concrete casting completed 24 hours.4.11 The tie bolt holes will be fill up ( the method and material will be submitted separated )