ear Ms Kornkamol
Please see the attached file.
1.You have changed the width of Pipe bridge 1 in N-S direction from 4000 mm to 3900 mm. You have changed the reference from Impbin center from 7000 mm in our drawing to 6000 mm. Also the column to column distance has been changed from 6000mm (103/104 in our drawing) to 3500 mm ( JD/JE in your drawing ).You have also added your pipe bridge in the South direction. If you see the Equipment layout then we have placed the sealing water pumps in this area with the pipes connected to it from pipe bridge. Similarly you have changed the column to column distance in the pipe bridge 2 in E-W direction from 4500 mm to 4000 mm.
Doing all these changes as per your drawing will be a huge impact on us as many man-hours has been spent on the design and detailing of these structures. We have to not only modify the complete design, but also change the piping for the same which result in a huge man hour cost and also delay the complete deliverables due in the next set. In our last two visits to the site you had informed us that any old structures ,foundations will be demolished.
Therefore it will not be possible to do the changes as you have proposed in your drawing and we need to continue with our layout and drawings