Figure 5-1. Layout of staves around tank bottom

TM 5-5430-209-12

Figure 5-1. Layout of staves around tank bottom.

radial seam. In paragraph 3-7 c (3),

c. Dressing Staves. Refer to paragraph 3-7b (2)

eleven

intermediate

staves

are

and dress the staves.

d. Preparing Outer Edge of Tank Bottom. Refer to

installed.

5-10. Scaffold

paragraph 3-7 b (3) and prepare the outer edge of the

Before installing the tank deck it is necessary to install a

tank bottom.

5-9. Installation of Side Staves.

portion of the scaffold components, provided in the

Refer to paragraph 3-7c and install the side staves.

storage tank erection outfit, around the top chime of the

NOTE

staves. Follow the procedure outlined in paragraph 3-8.

5-11. Dressing Top Chime

In paragraph 3-7 c (1), the first stave

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

and all subsequent staves straddle a

Section III. ASSEMBLY AND INSTALLATION OF CENTER SUPPORT LADDER

5-12. Assembly of Ladder

b. Assembling Ladder. Assembly procedures are

a. General. The ladder consists of a bolted, steel

identical to those described in paragraph 4-12. In step

(3), the assembled section contains 5 steps. In step (7),

angle section. Top of the ladder is fitted with a manhole

the short leg measures 9 feet, 5-5/16 inches from top

dome. Bottom of the ladder is fitted with ladder braces

flange of dome.

(flanged, flat, steel plates). Small ends of the deck

5-13. Installation of Ladder

plates are bolted to the manhole dome bottom flange.

Refer to paragraph 4-13 and install the ladder.

Section IV. ASSEMBLY AND INSTALLATION OF TANK DECK

5-14. General

5-17. Installation of Deck Plates

a. Layout of Assembled Plates.

The assembled deck consists of 14 tapered, flat, steel

Refer to

paragraph 4-17 a and lay out the plates.

plates (1, fig. 3-20). There are three special plates: two

b. Adjustment of Center Support Ladder. Refer to

are fitted with a pressure vacuum valve, and the third is

paragraph 4-17 b and adjust the ladder. In step (1),

fitted with a liquid level indicator. All plates are

interchangeable.

distance from top of tank bottom to outer face of top

5-15. Layout and Assembly of Plates

flange of dome is 9 feet, 6-9/64 inches.

c. Gin Pole. To install deck plates, remove and

Refer to paragraph 4-15, layout and assemble the

plates.

assemble the gin pole components, less foot spike,

5-16. Assembly of Special Plates

provided in the tank tool erection set.

procedures prescribed in paragraph 3-16 c.

Refer to paragraph 4-16 and assemble the three special

d. Installing First Deck Plate. The first plate

plates.

installed is one of two plates with a pressure vacuum

valve (2, fig. 3-20. The other plate with a

5-2