MIL-STD-209 Lifting And Tiedown ProvisionsThis standard establishes dimensional limits, design considerations, positioning requirements, and strength requirements for lifting to include helicopter sling load HSL and tiedown provisions for lifting or tying down tanks and other tracked vehicles, tactical wheeled vehicles, helicopters, and other military equipment shipped assembled or disassembled in unboxed or uncrated condition, and for restraining cargo or accessories to such equipment. The lifting and tiedown requirements in this standard are necessary to permit compatibility between military equipment and the transportation systems used for deployments.

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MIL-STD-209K APPENDIX B

APPENDIX B

SAMPLE PROBLEM FOR DETERMINING THE REQUIRED TEST SLING LENGTHS AND STRENGTH OF THE LIFTING PROVISIONS

B.1  SCOPE

B.1.1 Scope. This appendix establishes a method for determining the required strength of the lifting provisions, and length of slings to use for testing. If the resulting length of slings using this method causes interference between the equipment and the slings when the equipment is lifted, then see paragraph B.5.1.11 for the required test sling length.

B.2 APPLICABLE DOCUMENTS.  None

B.3 NOTATION

B.3.1 Symbols. The following letter symbols are used throughout this appendix:

Da - lateral distance from CG to provision a, on a horizontal plane, in inches Db - lateral distance from CG to provision b, on a horizontal plane, in inches Dc - lateral distance from CG to provision c, on a horizontal plane, in inches Dd - lateral distance from CG to provision d, on a horizontal plane, in inches Dab - lateral distance from provision a to provision b, on a horizontal plane,

in inches

Dcd - lateral distance from provision c to provision d, on a horizontal plane, in inches

GW - gross weight, in pounds

ha - distance from provision a to the CG, on a horizontal plane, in inches hb - distance from provision b to the CG, on a horizontal plane, in inches hc - distance from provision c to the CG, on a horizontal plane, in inches hd - distance from provision d to the CG, on a horizontal plane, in inches

- distance from the provisions to the CG, on the plane of the provisions, when the

equipment is resting on a level surface, in inches

Source:  https://assist.dla.mil  --  DBow-1nloaded:  2014-09-28T23:10Z Check  the  source  to  verify  that  this  is  the  current  version  before  use.