(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 ½-by 1 ½-
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
(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
(6) Apply sealing compound to the inside perimeter
of bottom chime (3, fig. 3-16) of the staves.
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
SECOND RING STAVES
Build as many temporary ladders as necessary to reach
OPEN BOLT HOLE
the various heights of the scaffold at strategic points
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