Rule 4923.
(1)
In addition to the inspection prescribed by
R 408.14912, an employer shall
designate an employee to make a thorough periodic inspection of an alloy steel
chain sling in use on a regular basis. An employer shall determine the
regularity of inspection based on all of the following factors:
(a) Frequency of sling use.
(b) Severity of service conditions.
(c) Nature of lifts being made.
(d) Experience gained on the service life of
slings used in similar circumstances.
The designated employee shall inspect an alloy steel
chain sling at least once every 12 months.
(2) The employer shall make and maintain a
record of the most recent month in which each alloy steel chain sling was
thoroughly inspected and shall make the record available for
examination.
(3) The employee
designated to make the inspection of an alloy steel chain sling shall make a
thorough inspection for all of the following:
(a) Wear.
(b) Defective welds.
(c) Deformation.
(d) An increase in length beyond acceptable
limits established in this part.
If the defects or deteriorations are present, then the
designated employee shall immediately remove the sling from
service.
(4) The
employer shall ensure that, before use, each new, repaired, or reconditioned
alloy steel chain sling, including all welded components in the sling assembly,
is proof-tested by the sling manufacturer in accordance with ASME B-30.9
"Slings," 1990 edition, as adopted in
R
408.14901.
(5) The employer shall retain a certificate
of the proof test and shall make it available for examination.
(6) If the chain size at any point of the
link is less than that stated in Table 1, the employer shall remove the chain
from service.
TABLE 1
MINIMUM ALLOWABLE CHAIN SIZE AT ANY POINT OF
LINK
|
Chain size (inches)
|
Minimum allowable chain size
(inches)
|
|
1/4
|
13/64
|
|
3/8
|
19/64
|
|
1/2
|
25/64
|
|
5/8
|
31/64
|
|
3/4
|
19/32
|
|
7/8
|
45/64
|
|
1
|
13/16
|
|
1 1/8
|
29/32
|
|
1 1/4
|
1
|
|
1 3/8
|
1-3/32
|
|
1 1/2
|
1-3/16
|
|
1 3/4
|
1-13/32
|
