MIL-S-22824E
3.5 Standard commercial Product. The sling assembly shall, as a minimum, be
in accordance with the requirements of this specification and shall include the
manufacturer's standard commercial product. Additional or better features which
are not specifically prohibited by this specification but which are a part of
the manufacturer's standard commercial product, shall be included in the sling
assembly being furnished. A standard commercial product is a product which has
been sold or is being currently offered for sale on the commercial market
through advertisements or manufacturer's catalogs, or brochures, and represents
the latest production model.
3.6 Design and construction. The sling assembly shall be fabricated and
assembled as shown in figures 1 through 9. The sling assembly shall be able to
withstand a capacity test of twice the rated capacity without permanent
deformation or failure. Except for the spreader bar and flounder plate, each
individual component of the sling assembly shall withstand the proof load test.
3.7 Pear link. The pear-shaped links shall be hot-dip zinc coated, forged
or welded structural quality steel. The proof loads shall be not less than as
follows:
1-3/4 inch rod diameter (size 5 sling) = 95,000 pounds.
2-3/4 inch rod diameter (size 17 sling) = 160,000 pounds.
* 3.8 Shackles. All shackles shall be anchor type, high strength, safety
(bolt and nut), hot-dip zinc coated, conforming to type IV A, grade B, class 3
of RR-C-271. The proof loads shall be the loads corresponding to the shackle
sizes as shown in RR-C-271.
3.9 Flounder Plate. The flounder plate (see figure 3), for size 30 sling
shall be hot-dip zinc coated steel plate conforming to ASTM A 36. All flame cut
edges shall be ground smooth.
* 3.10 Wire rope leg assemblies. All wire rope leg assemblies shall have the
rope ends mechanically spliced or swaged by pressing a metallic sleeve over a
flemish eye splice. The proof load for each leg assembly shall be not less than
as follows:
12,800 pounds.
9/16
inch
diameter
=
15,600 pounds.
5/8
inch
diameter
=
39,300 pounds.
1
inch
diameter
=
48,100 pounds.
1-1/8
inch
diameter
=
84,400 pounds.
1-1/2
inch
diameter
=
1-3/4
inch
diameter
= 113,200 pounds.
2-1/4
inch
diameter
= 177,800 pounds.
3.10.1 Fire rope. Wire rope shall be 6 by 37 strand, uncoated, extra
improved plow steel, regular lay, preformed with independent wire rope center,
conforming to type I, class 3 of RR-W-410.
3.10.2 Thimbles. Thimbles for wire rope shall conform to FF-T-276, type
111, heavy-duty, hot-dip zinc coated.
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