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Page Title:
Table 6-1. Bill of Materials for Blocking and Tiedown of the RTCC Operational Configuration in General Cargo Vessels |
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 TM 55-3810-306-15
(3) Loading Ships, Landing Craft, and
(4) SEABEE Barges.
Requirements for
securing the RTCC aboard general-cargo and barge-
Amphibious Vehicles. When the RTCC is to be moved
type vessels are essentially the same. Barge stability is
long distances or through rough waters, tiedowns must
noticeably affected by loading heavy items. The RTCC
be used. Most vessels are equipped with turnbuckles
should be loaded symmetrically near the center line of
with a sheep's foot on one end that fits into a deck
the barge in a manner to counterbalance variations in
cloverleaf. A suitable substitute may be used where
centers of gravity. The RTCC may be placed alternately
turnbuckles are not provided.
head to tail in any direction to achieve proper balance.
Table 6-1. Bill of Materials for Blocking and Tiedown of the RTCC Operational Configuration in General Cargo
Vessels (fig 6-2)
Item
Description
Approximate
Quantity
Lumber
Douglas Fir, or comparable; straight-grain, free from material defects; Fed Spec MM-L-751:
2- x 10-inch
120 linear feet
4- x 6-inch
12 linear feet
6- x 8-inch
140 linear feet
Nails
Common, steel; flathead; bright or cement coated, table X1-b, Fed Spec FF-N-105:
40d
80
Wire rope
6 by 19, IWRC; improved plow steel; preformed, regular lay; table XI, Fed Spec RR-W-410:
5/8-inch
220 feet
Clamps
Wire rope, U-bolt clamps, saddled single grip, forged steel, Crosby heavy duty, or equal; Fed Spec
FF-C-450:
5/8-inch
32
3/4-inch
8
Thimbles
Standard, open type: 5/8-inch
8
Shackle
Anchor shackle, screw pin, type IV, class 1; Fed
1
Spec RR-C-271: 1-1/8-inch (1-1/4-inch diameter
pin); NSN 4030-00-185-0487
Table 6-2. Application of Materials for Blocking and Tiedown of the RTCC Operational Configuration
in General Cargo Vessels (fig 6-2)
Item
No. Required
Application
A
12
Lumber, 2- x 10- x 120-inch. Pre-position on vessel hold deck so that three
pieces will be under each wheel.
B
2
Side blocking for rear wheels, 6- x 8-inch x 260-inch lumber. Place at sides
of rear wheels.
C
2
Side blocking for front wheels, 6- x 8- x 260-inch lumber. Place at sides of
front wheels.
D
4
End blocking 6- x 8- x 160-inch lumber. Locate on top of items B and C.
Place one in front and rear of front set of wheels and in front and rear of rear
set of wheels. Toenail each end to B and C with four 40d nails.
E
8
Backup cleats. Each consists of 4- x 6- x 18-inch lumber. Place on top of side
blocking (items B and C) against item D. Nail to side blocking with four 40d nails.
F
as required
Bracing. Each consists of 6- x 8- x length-cut-to-suit lumber. Brace as
required against adjacent vehicle, cargo, or side of vessel bulkhead, as appro-
priate. Secure end of each piece to adjacent blocking by toenailing with four
40d nails. (Lumber and nails for this requirement are not included in table 6-1)
G
8
Wire rope, 5/8-inch. Form two loops from each vehicle tiedown provision to
appropriate deck pad eye.
6-4
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