Assembly of Tank Bottom

TM 5-5430-209-12

3-2. Assembly of Tank Bottom

f. Work from the ground face of right bottom plate

a. The left bottom plate (3, fig. 3-1) is fitted with a

(4) and push bolts (7) through bolt holes of flanged

opening. Place blocking under bolt and flange assembly

2-inch pipe plug (1) made up in the 2-inch pipe coupling

to hold it in position.

(2). No additional assembly work is required.

g. Slip gasket (6) over bolts (7) and force it down

b. The right bottom plate (4) is fitted with a 2 inch

against the inside face of plate (4).

pipe plug (1) made up in the 2-inch pipe coupling (2). A

h. Slip outside flange half (10) over bolts (7) with

6-inch blind flange set is assembled on the plate to

machined face of flange facing the gasket.

complete the assembly.

i. Apply nuts (5) to bolts (7). Tighten the bolts.

c. Block up plate (4) 6 inches off the ground. Cut

Remove plate from blocking and lay it on tank

six 1-hole gaskets (9) from gasket material. Force a

foundation.

gasket over and against the head of each bolt (7).

j. Use short pieces of 2 by 4's as blocking, and

d. Insert bolts through bolt holes in flange half (10)

raise the lap seam end of right bottom plate (4). This

from outside face of flange with heads of bolts fitting

will simplify the work of attaching channel (2, fig. 3-2) to

into the cutouts provided.

e. Place bolt-retaining boards on the ground.

the right bottom plate (4, fig. 3-1). Set blocking in

about 6 inches from edge of plate to clear the channel.

Position flange assembly with bolt head resting on

boards. Slip gasket (6) over bolts and force it down

against the inside face of flange (8) using a round,

smooth-mouth tool.

Figure 3-2. Channels, bolts, and gaskets installed on bottom plate.

k. As a ladder brace (para 3-12) is placed in the

finger-tighten to hold channel in a temporary position

while completing installation of the remaining bolts.

lap seam of the plates at center of tank bottom during

m. Count off 5-bolt holes on each side of the center

final installation, 11 each 1/2-by 11/2-inch bolts are

required in the lap seam to attach the ladder brace to

bolt and install 10 each i/2 -by 1 ''2 inch bolts. Insert by

the tank bottom.

1'4 inch bolts (3, fig.

3-2) in the remaining bolt holes.

NOTE

Apply a nut to each bolt and finger-tighten.

n. Remove blocking (1, fig. 3-2) placed under the

To Insure that the ladder brace bolts are

properly installed mark center bolt hole

plate and lay bolt backing boards under bolt heads as a

in bottom plate and bottom plate

blocking is removed.

channel

l. Insert a ' ,-by '2 -inch bolt through center bolt

hole of bottom plate channel (2, fig. 3-2) and right

bottom plate (4, fig 3-1). Apply a nut to the bolt and

3-3