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Figure 8-29. Bracing first stave and driving bolt heads into channels.
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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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Dressing the Top Chime cont'd
TM 5-5430-209-12
(4) Install remaining bolts (3) in chime of the bottom
and install nuts (5, fig. 8-26). In the first row of the
seam bolt holes, in every other stave, install -by 1 -
inch bolts in the third and twentieth boltholes counted
down from the top chime.  These are the scaffold
mounting bolts. Install remaining bolts (2, fig. 8-27) in
all seams. Install steel recessed washer, cup side down,
on all seam bolts. Install nuts, rounded face down, on
all bolts.
(5) Tighten all bottom chime bolts uniformly.
Remove blocking (1, fig. 3-15) placed under the bottom
chime. Use heavy long timber (2) as a lever and short
timbers (3) as a fulcrum to lift the chime. Tighten all
seam bolts.
(6) Apply sealing compound to the inside perimeter
of bottom chime (3, fig. 3-16) of the staves.
8-11. Scaffold
a. General. Before installing second ring staves, it is
necessary  to  install  a  portion  of  the  scaffold
components, provided in the storage tank erection outfit,
around the top chime of first ring staves.
b. Installation. Refer to paragraph 3-8 and install the
1.
SECOND RING STAVES
2.
STRIP GASKET
scaffold.
3.
WEDGE GASKET
NOTE
4.
BOLT
Build as many temporary ladders as necessary to reach
5.
OPEN BOLT HOLE
the various heights of the scaffold at strategic points
ME 5430-209-12/8-31
around the tank.
8-12. Dressing the Top Chime
Figure 8-31. Dressed top chime of first ring staves
a. Install strip gasket (2, fig. 8-31) to cover all bolt
b. Insert wedge gasket (3) under strip gasket (2) at
holes. When one roll of gasket material is exhausted
each lap formed by adjoining staves.
and a new roll is started, the overlap should extend over
two bolt holes. Apply sealing compound at each end of
overlap.
8-17

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