A collapsible rolling ladder with self-leveling stair threads was designed and installed in a double deck floating roof tank in Iraq. Spreadsheets were developed to calculate stresses for various types of storage tanks, including cone roof, dome roof, external floating roof, and internal floating roof tanks. The spreadsheets consider static loads, wind loads, seismic loads, and internal and external pressures. Floating roof calculations in the spreadsheets include buoyancy checks, plate buckling checks, leg pipe supports, roof drains, and emergency drain systems. Vessel sizing spreadsheets were created according to ASME requirements and other spreadsheets were developed to determine flow tee thickness and slot area thickness. A new packing crate was designed for lifting plates

1. SPECIFIC ACHIEVEMENTS:
 Collapsible type of Rolling Ladder was newly designed, fabricated and successfully erected in
client’s location. This design was developed for Double Deck Floating Roof Tank of tank height
greater than diameter and erected in Najaf Refinery, Iraq. The ladder was designed with self
leveling stair threads.
 Spreadsheet Calculations was developed to the following type of storage tanks.
 Cone Roof
 Dome Roof
 External Floating Roof
 Internal Floating Roof
The Calculation Involves Static Calculation which comprise Shell, Bottom, Roof Plates, CG
Calculation, Wind Girder Calculation, Wind Analysis, Seismic Analysis, Dynamic Hoop Stress,
Anchorage Design, Internal Pressure and External Pressure Calculation for Storage Tanks.
Floating Roof Calculation was also developed whichinvolvesBuoyancy Check,Plate Buckling
Check, Leg Pipe Support, Roof Drain, Emergency Drain system and Rimvent Calculation.
 Vessel Sizing were done by developing spreadsheet based on ASME requirement.
 Spreadsheetwasdesigned to determine FlowTeeThickness and Slot Area Thickness.
 Packing Crate was newly developed forLifting Plates, Structures, Pipes etc.. Analysis were
done using ANSYS and STAAD Pro.Lifting Beam and Lifting plates were also designed for
lifting crates using FEAmethod.