Access Ladder

TM 5-5430-209-12

(4) Insert flange bolts through cover (1, fig.

(1) Install solid plug (1, fig. 3-25), small end

324), dust restrictor, pipe sleeve spacers, and top flange

first, inside the coupling (2), Use a hammer and drift pin

of dome, in that order. Install nuts on bolts and tighten.

to drive it tight.

3-19. Access Ladder

(2) Install retainer cup (3) over plug (1);

a. General. The access ladder consists of one,

tapered face of packing should ' ear against tapered

bolted, steel angle section. The top of the ladder is

seat in coupling (21.

attached to the deck by two hand rails. Two braces

(3) Install gland nut (4) over plug (1). Take up

support the ladder at the bottom chime of a stave.

the nut carefully and tight on the coupling (2).

b. Assembly.

(1) Place access ladder rails (3 and 4, fig. 3-

24), with similar bolting legs facing each other, on top of

several pieces of blocking. The blocking should be long

enough to support both rails. Rails should be spaced

wide enough apart to install ladder step (6).

(2) Select the bottom of the ladder. Seven

steps make up the assembled section. Insert bolts (5)

through ends of step (6) and access ladder rails (3 and

4) in that order. Install a nut on each bolt, and tighten

after all nuts are installed.

(3) Install braces (7 and 8) at bottom of

access ladder rails.

(4) The leg with three boltholes near each

end of the braces is attached at the outside face of the

vertical legs of the sections.

(5) Insert a bolt through the end bolthole in

rails (3 and 4) and braces (7 and 8), in that order. Install

nuts on bolts and finger tighten bolts.

(6) Install hand rails (9) at top of access

ladder rails (3 and 4). Insert bolts through ladder rail

horizontal legs and rails, in that order. Install nuts on

bolts and tighten bolts.

c. Installation

NOTE

Use a temporary ladder when Installing the

access ladder

(1) Place assembled ladder where it is

convenient to the pressure vacuum valve at outer

perimeter of deck.

(2) Lift ladder and set end bolt holes of

braces (7, and 8, fig. 3-24) over bolts in bottom chime of

the staves. Mark the bolts.

(3) From top of the temporary ladder, mark

bolts in outer perimeter of deck covered by the hand rail

(91. Remove the access ladder. Remove nuts from the

1. PLAIN SOLID PLUG

bolts.

2. SLEEVE-TYPE COUPLING

(4) Set access ladder back over the bolts.

3. RETAINER CUP

Install nuts on bolts and tighten the bolts.

4. GLAND NUT

(5) Tighten bolts attaching braces to bottom

Figure 3-25. Plug installed

of ladder.

(6) Remove and disassemble the temporary

3-21. Water Drawoff Valve

ladder.

a General. The valve assembly consists of a

3-20. Gland Stave Plugs

'2inch bronze valve made up in a steel flange and a

a. general. The gland stave is fitted with three

gasket installed outside the tank. A one-piece flange

gland openings. When the tank is used for gasoline

elbow with gasket is installed inside the tank. The valve

storage the openings are plugged. For oil storage a

and elbow are bolted together through the side of the

steam coil is installed inside the tank, the glands being

tank.

used for the coil.

b Installation.

(1) Flanged elbow. The elbow (1, fig. 3-26) is

NOTE

installed inside the tank on the stave (5).

"Work inside the tank

3-22