Grain Systems Tanks PNEG-805 - Manual (Page 67)

PNEG-805 36' Diameter 40°/45° NCHT Commercial Hopper Tanks 67
19. Hoisting
Hoist Instructions
Recommendations for hoisting completed tank onto hopper bottom structure.
(All parts mentioned in this section are not furnished.) A crane is normally used to lift the tank and place
it on top of the substructure. Technique of hoisting of the complete tank on the hopper structure is in large
part based on personal experience, equipment and manpower. The following recommendations are
intended as a guideline only.
1. Before lifting the tank the following should be checked:
a. The columns and substructure should be checked for levelness and verified plumb and leveled
if necessary.
b. Final ladder and safety cage and door locations should be determined and clearance at these
locations verified.
c. Proper provisions should be made for safe working platforms around the top of the substructure.
2. Lifting technique are largely influenced by personal experience and equipment capacity however
general recommendations as follows:
a. Twelve (12) lifting brackets should be attached at the stiffeners. At least one bracket on every
other stiffener should be used. These would typically be attached in the third ring from the bottom
of the tank. Brackets should attach to a minimum of four (4) bolts through the stiffener. Attach
cables to the lift brackets and to the crane hook, which has been lowered through the center ring
opening. Cables should be sized to handle the entire weight of the bin. Make all lift cables of equal
length before the bin is lifted.
(See Figure 19A and Figure 19B.)
b. To prevent distortion of the assembled tank a “spider” or horizontal bracing is recommended.
A suggested method of this is illustrated in the following details. This may be done by using
a center “hub” and pipe. The center hub would typically be made of 6" schedule 40 pipe with
four (4) 3" x 3" x 3/8" angles welded to it and the pipe bolting to the hub. The second smaller
pipe would bolt to the lifting brackets attached to the stiffeners.
(See Figure 19C on Page 68.)
Four (4) horizontal braces are recommended.
c. Use of temporary bracing across the peak collar may be needed to guide the cable. This should
be made easily removable.
Figure 19A Figure 19B
Ref # Description
A Stiffener
B Lift Bracket Every Other Stiffener