MIL-DTL-2902E
3.1.1 Recovered materials. Unless otherwise specified herein, all equipment, material,
and articles incorporated in the products covered by this specification shall be new and may be
fabricated using materials produced from recovered materials to the maximum extent practicable
without jeopardizing the intended use. The term "recovered materials" means materials which
have been collected or recovered from solid waste and reprocessed to become a source of raw
materials, as opposed to virgin raw materials. None of the above shall be interpreted to mean
that the use of used or rebuilt products is allowed under this specification unless otherwise
specifically specified.
3.2 Assembly. The safety line shall be a 50-foot wire rope with a self-locking snaphook
on each end (see figure 1). Each line shall have the following parts:
a.
One wire rope.
b.
Two self-locking snaphooks.
c.
Two thimbles.
d.
Four wire rope oval sleeves.
3.2.1 Wire rope.
3.2.1.1 Type I. steel. Type I, corrosion resistant steel wire rope shall be 3/16 inch,
7 by 19 preformed cable, type VI, class 3 as specified in RR-W-4l0.
3.2.1.2 Type II. phosphor bronze. Type II, phosphor bronze wire rope shall be 3/16
inch, 7 by 19 preformed cable, type VI, class 3 as specified in RR-W-410.
3.2.1.3 Weight. The wire rope not including the self-locking snaphooks, thimbles, and
wire rope oval sleeves shall weigh 7.4 ± 0.5 pounds per 100 feet.
3.2.1.4 Strength. The safety line completely assembled shall not show any permanent
set in the self-locking snaphook, slippage of the wire in the wire rope oval sleeves, or damage to
the wire rope when tested in accordance with 4.4.
3.2.1.5 Diameter. The diameter of the wire rope shall not be less than that specified, but
may exceed it by a maximum of 10 percent.
3.2.2 Self-locking snaphooks. The snaphooks shall be self-locking in accordance with
ASME B30.10 and of a double locking design similar to the snaphooks shown in figure 2. The
snaphook shall be sized to slip over and retain a 1/2-inch diameter rod in the snaphook. The gate
shall not open unless the latch is manually held in the unlocked position. The latch shall be
designed so a semi-rigid rod, capable of a minimum 6 inch bend radius without deforming,
cannot simultaneously unlock and open both the latch and gate.
3.2.2.1 Operation. The gate and latch shall be operable by the thumb and forefinger
from one gloved hand to admit or release an anchor support. The time required to open the latch
shall not exceed five seconds. The gate and latch shall return to the locked closed position when
the opening pressure is released. The gate shall not open when a static opening force of 3.5
3
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