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Grade 100 Alloy Chain
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Page 181
 

WORKING LOAD LIMIT - 4 TO 1 DESIGN FACTOR

Chain Size
(in.)
(mm)
Single Leg
Double Leg
Triple & Quad Leg
6
3200
5500
4500
3200
8300
6800
4800
1/4 (9/32)
7
4300
7400
6100
4300
11200
9100
6400
5/16
8
5700
9900
8100
5700
14800
12100
8500
3/8
10
8800
15200
12400
8800
22900
18700
13200
1/2
13
15000
26000
21200
15000
39000
31800
22500
5/8
16
22600
39100
32000
22600
58700
47900
33900

The design factor of 4 to 1 on Grade 100 Alloy Chain agrees with the design factor used by the International Standards Organization (I.S.O.) and ANSI B30.9 and is the preferred set of Working Load Limits being used.
TO MAKE YOUR CROSBY GRADE 100 ALLOY CHAIN SLING

Follow these simple steps in making a sling assembly.

Determine the maximum load to be lifted by the sling assembly.

Choose the type of sling assembly suited for the shape of the load and the size of the sling assembly for the load to be lifted. The decision must take into account the angle of the sling legs in multileg slings.

Determine the overall reach for bearing point of master link to bearing point on hook.

Select components, assembly chain and components. Affix sling identification tag to sling. The tag is available from your Crosby Distributor. The tag should be stamped with size chain, reach, type sling, Working Load Limit at a specific angle of lift, and some identifying number for record keeping.

If measurement comes in the link, cut the following link. For two leg type slings, count the links and use an even number for clevis hooks and odd number for eye hooks. This will position hooks in the same plane. In multileg slings always use the same number of links in each leg.

 

 

 
CAUTION
 

Derate chain sling in accordance with working load limit chart shown above.

A chain grab hook application will result in 20% reduction of chain capacity.

Care should be taken to observe these rerated applications or chain may fracture or permanently stretch at loads less than the advertised chain ultimate strength and proof load respectively.

   
   
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