Kennedy Wire Rope&Sling, Co.

WORKING LOAD LIMIT	MINIMUM ULTIMATE LOAD
The “Working Load Limit” is the maximum load in pounds which should ever be applied to chain, when the chain is new or “in as new” condition, and when the load is uniformly applied in direct tension to a straight length of chain.	The “Minimum Ultimate Load” is the minimum load at which new chain will break when tested by applying direct tension to a straight length of chain at a uniform rate of speed in a testing machine.
PROOF TEST	ATTACHMENTS
The “Proof Test” is a term designating the tensile test applied to new chain for the sole purpose of detecting injurious defects in the material or manufacture. It is the load in pounds which the chain has withstood under a test in which the load has been applied in direct tension to a straight length of chain.	Any attachments, such as hooks or links, should have a rated “Working Load Limit” at least equal to the chain with which it is used.
ANSI / ASME B30.9c-1997	CAUTION
Paragraph 9-1.4.2 “Mechanically assembled slings shall be comprised entirely of proof tested components.” Paragraph 9-1.4.2c “If untested components are employed, the sling shall be proof tested per Para. 9-1.4.1 prior to initial use.”	Only Crosby Alloy chain, Spectrum 8^Ž or Spectrum 10^Ž, should be used for overhead lifting applications. It must be recognized that certain factors in the usage of chain and attachments can be abusive and lessen the load that the chain or attachments can withstand. Some examples are twisting of the chain; disfigurement; deterioration by straining, usage, weathering and corrosion; rapid application of load or jerking and applying excessive loads, and sharp corners cutting action. Due to the crushing effect Grab Hooks have upon chain, the design factor of all chain assemblies must be reduced by 20% for Grab Hook applications.

CHAIN INSPECTION

TABLE 1 MAXIMUM ALLOWABLE WEAR AT ANY POINT OF LINK
Normal Chain or Coupling Link Cross Section	Maximum Allowable Wear Diameter (in.)
9/32	.037
3/8	.052
1/2	.069
5/8	.084
3/4	.105
7/8	.116
1	.137
1-1/4	.169
REFER TO ANSI B30.9 FOR FULL DETAILS

Use of Crosby Grade 80 Chain Under Heat Condition
Temperature of Chain		Grade 80
(şF)	(şC)	Reduction of Working Load Limit WHILE AT Temperature	Reduction of Working Load Limit AFTER EXPOSURE to Temperature
Below 400	Below 204	None	None
400	204	10%	None
500	260	15%	None
600	316	20%	5%
700	371	30%	10%
800	427	40%	15%
900	482	50%	20%
1000	538	60%	25%
Over 1000	Over 538	OSHA 1910.184 requires all slings exposed to temperatures over 1000ş F to be removed from service.

|* Crosby does not recommend the use of Alloy Chain at temperatures above 800° F.
** When chain is used at room temperature after being heated to
temperatures shown in the first column.

INSPECTION AND REMOVAL FROM SERVICE PER ANSI B30.9

FREQUENT INSPECTION
Normal Service - Monthly
Severe Service - Daily to Monthly
Check chain and attachments for wear, nicks, cracks, breaks, gouges, stretch, bend, weld splatter, discoloration from excessive temperature, and throat openings of hooks.

1. Chain links and attachments should hinge freely to adjacent links.
2. Latches on hooks, if present, should hinge freely and seat properly without evidence of permanent distortion.

PERIODIC INSPECTION - INSPECTION
RECORDS REQUIRED
Normal Service - Yearly
Severe Service - Monthly
This inspection shall include everything in a frequent inspection plus each link and end attachment shall be examined individually, taking care to expose inner link surfaces of the chain and chain attachments.

1. Worn links should not exceed values given in table 1 or recommended by the manufacturer.
2. Sharp transverse nicks and gouges should be rounded out by grinding and the depth of the grinding should not exceed values in Table 1.
3. Hooks should be inspected in accordance with ANSI B30.10.
4. If present, latches on hooks should seat properly, rotate freely, and show no permanent distortion
5. Chains use OSHA and ASME regulations and safety information.
See: OSHA 1926.2 (a) 4 and 1910.184
ASME B30.9 Slings
ASME B30.10 Hooks

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Catalog provided courtesy of The Crosby Group, Inc.