104
Chain Slings
a. If wear at any point of any chain link or the depth of gouge rounded out portion exceed the values in the
table below, the assembly shall be removed from service.
table below, the assembly shall be removed from service.
Chain sizes Maximum allowable wear
Chain sizes Maximum allowable wear
(inches)
(inches)
(inches)
(inches)
1/4
3/64
1
3/16
3/8
5/64
1-1/8
7/32
1/2
7/64
1-1/4
1/4
5/8
9/64
1-3/8
9/32
3/4
5/32
1-1/2
5/16
7/8
11/64
1-3/4
11/32
b. Sharp transverse nicks shall be rounded by grinding.
c. Assemblies with deformed master or coupling links or cracked hooks or attachments shall be removed
from service.
from service.
d. Alloy steel chains shall be permanently removed from service if heated above 1,000
O
F and capacities
reduced if exposed to temperatures of 600
O
F.
Natural and Synthetic Fiber Rope Slings
a. Slings shortened with knots, bolts, or other unapproved methods
b. Damaged slings
c. Rope less than 1/2 inch diameter
d. Slings subjected to a sustained load equal to the rated capacity for more than 3 days
e. Slings made from old rope
f. Slings subjected to chemically active environments unless permitted by the rope manufacturer
g. Frozen rope slings or rope slings subjected to temperatures below minus 20
O
F or above 180
O
F shall be
removed from service or have capacities reduced in accordance with manufacturer's requirements.
h.
Visual indication of ultra-violet degradation such as:
1)
Bleaching out of sling color
2)
Increased stiffness of sling material
3)
Surface abrasion in areas not normally in contact with the load