Figure 6-11. Deck rafter assembled

TM 5-5430-209-12

(3) Place retainer angle (5) on bolthead side of

each rafter so that the plain leg of the angle is toward

the bolts. Secure the angle to the rafter with eight l/2 by

1 inch bolts (6) and nuts.

(4) Install a rafter clip (7) on the inner end of each

rafter as shown on A, figure 6-11. Secure the clip to the

rafter with two bolts (6) and nuts.

(5) Install a rafter hanger (8) on the outer end of

each rafter as shown on B, figure 6-11. Secure the

hanger to the rafter with two bolts (6) and nuts.

c. Assembling Deck Plates.

(1) Bottom of deck plates are the side with light

colored paint. Plate lap seams are identified as right

and left by facing large end of the plates. First plate

installed is assembled with rafters under each lap seam.

No assembly is required for the last plate. Intermediate

plates are assembled with a rafter under the right lap

seam.

(2) Assemble a rafter under the right lap seam of

nineteen plates so that bolts (2) will pass through holes

in the plates, leaving two end boltholes of each plate

vacant.

CAUTION

Do not use sharp-edge tool or pipe to force

gasket over bolts. Use well rounded, smooth-

mouth tool.

(3) Install strip gasket (5, fig. 6-3) over bolts along

full length of the right lap seam. Allow 1l/2-bolthole

RAFTER

overlap at each end.

BOLT

NOTE

LONG CHANNEL

When there is a break in the gasket

SHORT CHANNEL

material, ends should overlap two

RETAINER ANGLE

boltholes and be cut squarely across the

BOLT

second hole. Apply sealing compound to

RAFTER CLIP

each end of overlapped gasket to insure a

RAFTER HANGER

leakproof joint.

ME 5430-209-12/6-11

(4) Install a nut loosely on each end bolt and

Figure 6-11. Deck rafter assembled.

middle bolt to hold plate and rafter together during

installation.

(1) Insert /2 by 11/4 inch bolts (2) through long

channel (3) and short channel (4) for each rafter (1).

(5) On one of the nineteen previously assembled

(2) Block up each rafter, top side down. Insert bolts

plates, assemble a rafter under the left lap seam. Follow

(2) of long channel (3) in the rafters, starting at the outer

procedures in steps (2), (3), and (4) above. This will be

end. Insert bolts (2) of short channel (4) in the rafters

the first plate installed.

next to long channel (3). Be sure bolt heads are seated

squarely in the channels.

Assembling Special Plates.

NOTE

If tank is to be used for water storage,

omit the two pressure vacuum valves and

substitute the blind hatch flange.

(1) For each deck plate, insert '/2 by 11/2-inch

bolts (1, fig. 6-12) in eight 2-hole bolt channels (2).

6-13