Grain Systems Tanks PNEG-1085 - Manual (Page 15)

PNEG-1085 72'-90' Externally Stiffened 2 Ring Door 15
5. Assembly Instructions
Written instructions for installation of a NCWT0084 (72'-90' diameter bin/silo) 2 ring door package
in a externally stiffened tank.
1. The commercial 2 ring door is installed in the bottom 2 rings.
2. The door should normally be placed in line with the conveyor. An intermediate discharge well should
be located near the wall to clear grain from the area of the access door (as with any access door).
The door must be positioned directly below the vertical seam as shown
in Figure 6A on Page 17 .
3. The door has an inside frame weldment and an external frame weldment/assembly. If the tank has
not been erected the internal frame weldment should be placed inside the tank before erection. If the
tank has been erected or erection has begun, it will be necessary to remove sidewall and stiffeners
in the door placement area to place the inside frame weldment.
4. The door frame stiffeners are mounted in the external door frame directly under the sidewall stiffener
columns. (See Page 25.) The external door frame should have the stiffeners already in place with
two (2) bolts to hold them in location. These bolts will need to be removed to install the door, however
the stiffeners may be left in position in the frame.
The external door frame stiffener will be located in the standard externally stiffened tank anchor bolt
location.
(See Page 24.) Anchor bolts should not be placed in this location. If these anchor bolts are
pre-installed, they will need to be cut off. After all final adjustments to the door have been made, the
anchor bolts should be drilled in place through the internal frame.
(See Page 24.) GSI recommends
Hilti 1" x 12" HAS threaded anchor and 1" x 8-1/4" HVU adhesive capsules. (For seismic or special
situation tanks, consult GSI engineering.) The external door frame stiffener must be field welded to
secure it to the frame.
(See Page 24.)
5. Left and right hand jamb plates (NCWT0075L and NCWT0075R) are provided for attachment of the
sidewall sheets to the door frame. The jamb plate will mount between the internal and external frame.
Place the jamb plate between the internal and external frame and bolt the frame, plate and stiffener
together utilizing 7/16" diameter bolts. Utilize 7/16" x 2-1/2" bolts for the plate to jamb connection.
(See Page 26.) For the stiffener to jamb plate connection 7/16" x 3" bolts should be used. A special
recessed nut is provided that should be used with the 7/16" bolts. At the jamb plate to frame
connection install the bolts with the head and sealing washer on the outside of the tank. At the
stiffener to frame to plate connection install the bolts with the head and sealing washer on the inside
of the tank.
The internal door panel hinges will mount utilizing stiffener to frame bolts (on the inside of the tank).
Place an additional sealing washer under the hinge at those bolt locations before bolting it in place.
Shim as necessary with 7/16" flat washers to obtain proper alignment with door panel hinges. Place
hinges as shown on
Page 27 . The external door cover hinges will mount inside the stiffener on the
outside of the tank.
6. The sidewall sheets to the left and right of the door will mount to the outside of the jamb plate.
Two (2) special short sidewall sheets (44") and two (2) standard length (119"), special punched
sheets are provided. Attach the sidewall to the jamb plate utilizing 3/8" diameter x 2" long bolts.
(See Page 26.) Corrugated sealing strip, CWT-0053 is provided. This may be mounted at the outer
edge and inner edge of the jamb plate to sidewall interface. Caulk around the seal strip as well.
A flat washer may be required under the nut for certain gauge thickness.
Bolt head/sealing washer should be on the outside of the tank for this connection.