TM 55-2200-001-12
Change 4
NATO UNCLASSIFIED
7.
b.
For the Type II tie-down arrangement (see para 8.o. and 8.e.) the cross sections of the tie-down material,
depending upon the weight of the vehicle, must be in accordance with the following table:
Type of tie-down
Weight of vehicle
Minimum cross section per tie-
down
Minimum diameter per tie-down
Wire
Up to 10 t
7 mm2 per t of vehicle weight (1)
(2)
Chains
Up to 10 t
10 mm
Over 10 t
Up to 15 t
13 mm
Diameter
of
chain link
Over 15 t
Up to 20 t
16 mm
of
commercial
steel (3)
Over 20 t
18 mm
Wire ropes
Up to 5 t
8 mm
Over 5 t
Up to 10 t
12 mm
Over 10 t
Up to 15 t
14 mm
Over 15 t
Up to 20 t
16 mm
Over 20 t
18 mm
Hemp ropes
Up to 2 t
25 mm
NOTES
(1) The number of wires is to be rounded off to the next even number so that the individual wires can be properly
twisted.
(2) Wire of 3 mm diameter has a cross section of approximately 7 mm2
Wire of 4 mm diameter has a cross section of approximately 12.5 mm2
Wire of 5 mm diameter has a cross section of approximately 20 mm2
(3) Chains having a smaller diameter of round bar steel may be used if they are made of high-tensile material and
afford an equal degree of safety.
-8-
NATO UNCLASSIFIED
Change 4 AA-9
