TM 55-2320-260-15-1
Table 5-1. Bill of Materials for Blocking and Tiedown of Typical M809-Series Truck on M127-Series 12-ton or
L a r g e r Semitrailer (Fig 5-1,5-2, and 5-3)
Approximate
quantity
Description
Item
Douglas-fir, or comparable, straight-grain, free from material defects;
Lumber
24 linear ft
Fed Spec: MM-L-751c: 2- x 4-in _____________________________________
12 linear ft
2- x 6-in -------------------------------------
16 linear ft
6- x 8-in _____________________________________
C o m m o n , steel; flathead; bright or cement-coated; table Xlb, Fed Spec
Nails
48
FF-N-105a:
20d
____________________________________________________
52
30d ____________________________________________________
16
40d ----------------------------------------------------
200 ft
No. 8 gage, black annealed; Fed Spec QQ-W-461f ------------------------
Wire
as required
W a t e r p r o o f paper, or suitable material _________________________________
Material
Table 5-2. Application of Materials for Blocking and Tiedown of Typical M809-Series Truck on M127-Series 12-Ton
o r Larger Semitrailer (Fig 5-1, 5-2, and 5-3)
Item
No.
required
Application
A
8
Chock block (detail 1, item A, fig 5-3). Locate 33 portion against front of front and inter-
mediate wheels and against rear of front and rear wheels. Toenail heel of block (near
b o t t o m edge) to semitrailer floor with one 20d nail. Additionally, drive two 4d nails into
heel of block, perpendicular to semitrailer floor. Toenail each side of block to semitrailer
floor with two 30d nails on each side.
B
as required
Protective material (detail 2, item B, fig 5-3) such as waterproof paper or burlap, should be
located under bottom edge of 2- x 4- x 36-in piece and between tire and 2- x 6- 36-in
piece to extend 2 in above blocking.
Side blocking (detail 2, item C, fig 5-3). Each to consist of one piece of 2- x 6- x 36-in
c
4
lumber and two pieces of 2- x 4- x 36-in lumber. Nail 2- x 6- x 36-in piece to edge of
lower 2- x 4- x 36-in piece with five 20d nails. Place 2- x 6- x 36-in piece against tire and
nail to semitrailer floor through 2- x 4- x 36-in piece with five 20d nails in staggered
pattern. Nail other 2- x 4- x 36-in piece toone belowin like manner with five 30d nails.
Eight strands of No. 8 gage black annealed wire. Attach to front and rear tiedown provisions
D
4
on vehicles and semitrailer as indicated (fig 5-1 and 5-2). Substitute, if desired, 1/2- or
5/8-in IWRC wire rope in a complete loop, and secure with four cable clips spaced approxi-
mately in apart.
E
Wire twisters (sketch 1, fig 5-3). Use 2- x 2-in lumber by length-to-suit (metal rod or bolt
4
m a y be used in lieu of lumber). After twisting wire taut, rod, bolt, or lumber should be left
i n place and secured to prevent unwinding.
Table 5-3. Bill of Materials for Blocking and Tiedown of Typical M809-Series Truck on M270 Semitrailer (Fig 5-5)
Approximate
Item
Description
quantity
Lumber
Douglas-fir, or comparable, straight-grain, free from material defects; Fed
Spec: MM-L-751c: 6- x 8-in
6 linear ft
Chain
General service, S-leg, alloy steel, 1/4- to 1/2-in size, 10-ft length, with two
grabhooks.
6
Load binder
Lever operated, 4-in take-up, with two grabhooks designed for 1/4- to 1/2-in
chain. 18 1/2-in lever, large, 4-ton capacity, OD finish; MIL-B-1816 (FSN
3990-274-6746).
6
5-8
