Quantcast Figure 4-3. Installing wedge gaskets before installation of last bottom plate

 

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Figure 4-2. Installation of bottom plates
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TM-5-5430-209-12 Tank Steel Vertical Boted Knockdown Sealed Openings Standard Bottom and Roof Gasoline Oil or Water Manual
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Figure 4-4. Checking bolt spacing at installation of last bottom plate.
TM 5-5430-209-12
4-3. Installation of Bottom Plates
(2) Face small end of the plate. Install plate
to left of first plate, or in a counterclockwise direction,
With first bottom plate in its approximate installation
around the tank foundation.
location on the tank foundation, lay remaining plates
(3) Place small end of plate over bolts (3),
around the tank foundation as follows:
a. First Plate.
with right lap seam of plate laid over bolts in left lap
seam of first plate.
(1) Place small end of this plate over the
(4) Install steel washers and nuts, as in a (2)
center plate bolts (3, fig. 4-2).
above, on bolts along the center bottom plate and on
(2) Install a steel recessed washer, cupped
bolts along the lap seam of plates.
side down, over each bolt (3) and a nut loosely over the
NOTE
washer.
NOTE
Do not tighten nuts on the bolts until all
bottom plates have been installed.
Do not tighten nuts on the bolts until all
bottom plates have been installed.
c. Remaining  Intermediate  Plates.
Install
b. First Intermediate Plate.
remaining intermediate plates following the procedure
described in b above.
NOTE
d. Last Plate. Install last plate by placing its lap
Wedge-shaped gaskets must be used
seams over lap seams of next-to-last plate (1, fig. 43)
wherever  three  plates  are  joined
and first plate (2). Place small end over bolts (4). This
together.
is a vital point in the tank bottom, make sure it is secure
(1) Place wedge gasket (4, fig. 4-2) over
against leakage.
gasket at right edge of first plate.
1.
NEXT-TO-LAST PLATE
2.
FIRST PLATE
3.
WEDGE GASKET
4.
BOLT
Figure 4-3. Installing wedge gaskets before installation of last bottom plate.
(1) Installing Wedge Gaskets.  Apply heavy
(2) Adjusting Bottom Plates.  Adjustment of
coating of sealing compound to both faces of gaskets (3,
installed plates is necessary before the last plate can be
fig. 4-3) and install them over bolts (4). Use generous
correctly positioned. Adjust plates as follows:
amount of sealing compound at their overlap to seal
(a) Place last plate (1, fig. 4-4) over the
opening under small end.
space remaining for its installation.
4-3

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