ABSTRACT
For the erection of storage tanks, two well-established methodologies are available. The earliest methodology was the conventional erection of a storage tank from the bottom to top shell course (one after another) and roof structure and roof after that. The jacking methodology was developed later, wherein the erection of the shell courses start in reverse order from the top to bottom shell course. Each has its own advantages and disadvantages. The jacking up method has advantages in the case of fixed cone roof tanks, whereas for floating roof tanks, structural rigidity at the top could be a concern during lifting in some cases. Furthermore, there is no advantage of welding undercover for floating roof tanks, which depends on how and when the floating deck is constructed.
