Figure 6-7. Installing last stave

TM 5-5430-209-12

(3) Set stave (1) in position with its left seam outside

the right seam of last intermediate stave (4), and its

right seam inside the left seam of first stave (5). Loosen

bottom chime nuts of staves (4 and 5).

(4) Lift first stave (5) slightly so the bottom

chime of last stave (1) will slip into place. Use drift pins

(3, fig. 3-12) and aline the holes and bolts in staves (1,

4, and 5. fig. 6-7). Install nuts loosely on every sixth or

tenth bolts in each row to hold last stave (1) in place.

(5) Install nuts (3, fig. 6-6) loosely on all chime

bolts (2).

(6) Seat all seam bolts, and install steel washers

and nuts as instructed in d above.

f. Tightening Staves.

(1) Tighten all nuts (3, fig. 6-6) on chime bolts

(2) uniformly.

(2) Use heavy long timber (2, fig. 3-15) as a

lever and short timbers (3) as a fulcrum to raise the tank

bottom, and remove all blocking (1).

(3) Start at the bottom of each stave lap seam

and work toward the top, tightening the nuts evenly in

each row of each seam. Replace stripped nuts or bolts.

(4) Apply sealing compound to inside perimeter

of tank at seams (1, fig. 3-16) formed by the staves and

bottoms (3).

LAST STAVE

6-10. Scaffold

CHIME BOLTS

a. General. Scaffold components are provided in

STRIP GASKET

the tank tool erection set. Before proceeding with

LAST INTERMEDIATE STAVE

further erection of the tank, it is necessary to install

FIRST STAVE

scaffold components around the top chime of the

staves.

Figure 6-7. Installing last stave.

b. Installation. Refer to paragraph 3-8 and install

the scaffold.

(2) Install wedge gasket and radii gasket at

chimes on right seam of last stave as instructed in b (3)

6-11. Dressing Top Chime

above.

Refer to paragraph 3-9 and dress the top chime.

Section III. ASSEMBLY AND INSTALLATION OF TANK CENTER

SUPPORT ASSEMBLY

6-12. Assembly of Umbrella-Type Deck Support

(2). Each strut is connected by a strut clip (3) and bolts

a. General. The umbrella-type deck support

(5) to the rafter landing ring (1). Gusset cone (4) is the

center component of the support. It has five plates to

consists of a 1-piece, rafter landing ring (1, fig. 6-8)

which the struts are connected by bolts (6).

fitted on the inside with five equally spaced struts

6-7