K. Thirawit,
Please put below notes in big latter into all erection drawings:
Column installation in Column Rack notifications.
1. The Column alignments have to be in vertical position.
2. The Columns are not allowed to clash column racks (frame).
3. Safety Chains are not included in scope of calculation work. Contractor has to provided safety chain for safety.
4. Place a Safety tonnage for carry steel loads into each slotted as yellow paint latter.
Then please resubmit them to WHL, CDG & K. Boonchai for approval when it done.