terminals must be proof-loaded before placing the
sling in initial service.
The COMSECOND/COMTHIRDNCBINST
11200.11 series has rated capacity charts enclosed for
numerous wire rope classifications. You must know
the diameter, rope construction, type of core, grade,
and splice on the wire rope sling before referring to
the charts. The charts will give you the vertical-rated
capacity for the sling. The test weight for single-leg
bridle slings and endless slings is the vertical-rated
capacity (V.R.C.) multiplied by two or (V.R.C. x 2 =
sling test weight).
The test load for multiple-leg bridle slings must
be applied to the individual legs and must be two
times the vertical-rated capacity of a single-leg sling
of the same size, grade, and wire rope construction.
When slings and rigging are broken out of the TOA
for field use, they must be proof-tested and tagged
before being returned to CTR for storage.
Records
The crane crew supervisor must establish and
maintain a card file system containing a record of
each sling in the units inventory.
Proof
Test/Inspection Sheets (fig. 3-36) are used to
document tests made on all items of weight-lifting
slings, spreader bars, hooks, shackles, and so forth.
These records are permanent and contain the
following entries at a minimum:
1.
2.
3.
4.
5.
6.
7.
8.
Sling identification number (unit location and
two-digit number with Alfa designation for
each wire rope component)
Sling length
Cable body diameter (inches) and specifi-
cations
Type of splice
Rated capacity
Proof test weight
Date of proof test
Signature of proof test director
All the slings must have a permanently affixed,
near the sling eye, durable identification tag
containing the following information:
1. Rated capacity (in tons) (vert. SWL)
2. Rated capacity (in tons) (45-degree SWL)
3. Identification number
Spreader bars, shackles, and hooks must have the
rated capacities and SWL permanently stenciled or
stamped on them. OSHA identification tags can be
acquired at no cost from COMTHIRDNCB DET, Port
Hueneme, California, or COMSECONDNCB DET,
Gulfport, Mississippi. Metal dog tags are authorized
providing the required information is stamped onto
the tags.
Storage
Wire rope slings and associated hardware must be
stored either in coils or on reels, hung in the rigging
loft, or laid on racks indoors to protect them from
corrosive weather and other types of damage, such as
kinking or being backed over. Slings are not to be left
on the crane at the end of the workday.
Sling and Rigging Gear Kits
The NCF has slings and rigging gear in the
Battalion Table of Allowance to support the rigging
operations and the lifting of CESE. The kits 80104,
84003, and 84004 must remain in the custody of the
supply officer in the central toolroom (CTR). The
designated embarkation staff and the crane test
director monitor the condition of the rigging gear.
During the BEEP, the two crane crew supervisors
normally have the responsibility to inventory the
contents of the kits. The rigging kits must be stored
undercover.
Wire Rope Sling Inspection
All wire rope slings must be visually inspected for
obvious unsafe conditions before each use. A
determination to remove slings from service requires
experience and good judgment, especially when
evaluating the remaining strength in a sling after
allowing for normal wear. The safety of the sling
depends primarily upon the remaining strength. Wire
rope slings must be immediately removed from
service if any of the following conditions are present:
1. Six randomly distributed broken wires in one
rope lay or three broken wires in one strand in
one lay
2. Wear or scraping on one third of the original
diameter of outside individual wires
3-30
