TM 55-2200-001-12 Change 3 Section No.  1--General Rules (Rev.-9-1984) 4.2 Bent, twisted, stretched or collapsed links. 4.3 Links weakened by gouges or pits. 4.4 Chain repaired or joined with other than repair links of a type as illustrated.  (Fig.  1) 4.5 Links obviously worn or showing other visible evidence of loss of strength. 4.6 Knots or twists in any portion of the chain. 4.7 Spread or distorted grabhooks. 4.8 An anchor point used in the securement of the load which is in a weakened condition or shows evidence of loss of strength because of cracks, breaks, distortion or other deterioration. 5. Binders and Procedure for Testing: 5.1 Binders  are  to  be  marked  with  the  rated  capacity  which  is  equal  to  their  ultimate  breaking  strength. When binders are listed under paragraph 5.6, they will be identified as to size of chain with which they are to be used. The  Committee  will  take  into  consideration  the  working  load  limit  of  the  chain  as  related  to  the  maximum  breaking strength of the binder to identify the binder size and the type of chain with which the binder is to be used.  Generally, the working strength of the chain should be equal to Y of the rated capacity of the binder, 5.2 Binder manufacturers are requested to contact the Director, Rules and Inspection, concerning the testing of their products for approval for use on open top loading. 5.3 Upon request by a binder manufacturer, the Director, Rules and Inspection, will designate a member of the Open Top Loading Rules Committee to call upon the manufacturers and randomly select three binders of each model the manufacturer  desires  tested.    Binders  will  be  appropriately  identified  and  forwarded  to  the  AAR  Research  Center  for testing at the manufacturer's expense. 5.4 Binders are expected to fail at a point equal to or greater than their capacity as marked on the binder. 5.5 Failure  of  one  of  the  three  binders  does  not  exclude  the  product  from  further  consideration,  provided analysis  of  the  test  does  not  reveal  significant  defects.    An  additional  three  binders  may  be  selected  and  tested. Successful performance of the three binders qualifies the binders for inclusion in a list of acceptable binders. 5.6 List of Acceptable Binders Type of Chain 3/8  HT 3/8 Alloy 1/2 HT 1/2 Alloy Binder MFG.  & MODEL ACCO Industries, Inc.  Model BX 300 X ACCO Industries, Inc.  Model BXR 310 X ACCO Industries, Inc.  Model BX 400 X ACCO Industries, Inc.  Model BX 600 X Midland Forge Model 105 X Midland Forge Model 105-C X Midland Forge Model 106 X Campbell Chain Model C7R X Campbell Chain Model C7L X Durbin-Durco Model DD-7-1 X 5.7 Binders will be considered acceptable for use with Alloy Steel Chain provided they demonstrate a breaking force for size and grade not less than the following table: DEMONSTRATED BREAKING SIZE GRADE FORCE-POUNDS 3/8 43 16,200 3/8 70 26,400 3/8 80 25,600 1/2 43 27,600 1/2 70 45,200 1/2 80 45,600 a. To determine the acceptability of binders not listed above, the ratio between the demonstrated breaking force and the chain working load limit must be 3.0 for Grade 43 Alloy Chain; 4.0 for Grade 70 Alloy Chain; and 3.5 for Grade 80 Alloy Chain. D-26