TEA PAM 55-20 Tiedown Handbook for Truck - Military Surface ...

FOURTH EDITION SDDCTEA PAMPHLET 55-20
NOTES:
TABLE 5
WIRE ROPE
1. Improved plow steel (IWRC IPS) 6 x 19 Independent wire rope core.
2. Breaking strength as listed in supply documentation.
3. If a torque wrench is not available, adequate torque can be attained by: For
3/8-inch clamps, use 12-inch-long wrench and apply a force of about 50
pounds. For 1/2-inch clamps, use a 15-inch-long wrench and apply a force of
about 60 pounds. For 5/8-inch clamps, use an 24-inch-long wrench and apply a
force of about 70 pounds.
4. Wire rope is rated in nominal strength; actual strength may vary. When wire
rope is assembled in a complete loop using wire rope clamps, the strength
should be calculated as 80% of twice the value of the nominal strength. With an
end loop, the strength should be calculated as 80% of the nominal strength of
the wire rope.
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