? Preparing of GA drawings based on clients Data Sheet & Design Calculation. ? Shell development with Nozzle location, Roof layout & Bottom layout ? Roof Nozzles, shell Nozzles and gauge hatch & manhole details. ? Internal or External Roof structure details drawing. ? Spiral stairway or vertical ladder, Rolling Ladder, Platform & structure details drawing. ? Preparation of MTO, Cutting layout & welding map drawing. ? Revise the Drawings which were fabricated in Site/shop (AS BUILT).