Figure 4-2. Installation of bottom plates

TM 5-5430-209-12

b. Assembling First Bottom Plate. The first bottom plate

placed along each seam. Seams are identified as right

and left, facing the large end.

has a bolt channel placed under each radial lap seam

with radial bolts (1, fig. 4-2). Strip gasket (2) is

1. BOLT

3. BOLT

2. STRIP GASKET

4. WEDGE GASKET

Figure 4-2. Installation of bottom plates.

not apply to the last bottom plate, since no further

(1) Starting at large end of plate, place bolt

assemblies are made on it. Keep the last bottom plate

channel under right and left lap seams of plate. Insert

separated from all other plates until it is installed in the

bolts through all except the chime boltholes in the plate

tank bottom.

and channel.

d. Assembling Outlet Plate.

(2) As channels are placed, position bolt

retaining boards against the boltheads to facilitate

(1) Block up plate 6 inches off the ground.

installation of gaskets (2, fig. 4-2).

Cut six 1-hole gaskets from strip gasket material (2, fig.

(3) Install gasket (2) along the full length of

4-2). Force a 1-hole gasket over and against the head

the right and left lap seams. Allow a 1-1/2-bolthole

of each flange bolt.

overlap at each end.

(2) Insert bolts through boltholes in inside

NOTE

flange half from the outside face of the flange with

heads of bolts fitting into cutouts provided.

When there is a break in the gasket

(3) Lay bolt retaining boards on the ground.

material, ends should overlap two

Position flange assembly with bolt heads resting on the

boltholes and be cut squarely across the

boards. Slip a gasket over the bolts and, using a round

second hole. Sealing compound must

smooth-mouth tool, force gasket down against inside

be applied to each end of the overlap

face of the flange.

strip to ensure a leakproof joint.

(4) Work from the ground face of plate (7, fig.

(4)

Upon

completion

the

4-1) and push bolts through boltholes of the flanged

assembly, move this plate to its approximate installation

opening. Place blocking under bolt and flange assembly

position on the tank foundation.

to hold it in position.

c. Assembling Intermediate Bottom Plates. There are

(5) Slip gasket over bolts and force it down

against the inside face of the plate.

ten intermediate plates, including an outlet plate (7, fig.

(6) Slip outside flange half over the bolts with

4-1)which are assembled with channels and strip

machined face of flange facing gasket.

gaskets. Except that the channels are placed under the

(7) Install steel washer and nuts on bolts and

right lap seams, follow the assembly procedure outlined

in b above. The outlet plate (7) has, in addition, a blind

tighten the bolts. Remove plate from blocking and lay it

on the tank foundation.

flange set assembled on it. The above procedures do

4-2