MIL-STD-1365 General Design Criteria For Handling Equipment Associated With Weapons And Related ItemsThis design standard contains the general design criteria and applicable tests for beams, bands, strongbacks, cradles, assembly stands, slings, dollies, bomb loaders, trailers and hoists used as an integral component of an ordnance handling device associated with handling weapons and related items. This standard is not intended to be used directly for acquisition of related equipment, but is to be used as the basis to prepare appropriate development specifications from which the equipment is to be designed and procured.

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MIL-STD-1365C

5.7 Special handling requirements.

5.7.1 Hoisting and tiedown fittings. Equipment weighing more than 150 pounds shall be provided with hoisting and tiedown fittings in accordance with MIL-STD-209. In addition, if the equipment shall be delivered by parachute or touch-and-go, suspension and extraction provisions shall be provided in accordance with MIL-STD-

814. For internal air transport by fixed wing aircraft, see 6.4 for an appropriate source of guidance for restraint of cargo. For external airlift by rotary wing aircraft, MIL-STD-913 provides appropriate guidance for the restraint of cargo.

5.7.1.1 Single-point hoisting. Lifting devices shall be designed for single point hoisting, wherever possible. Lifting devices for heavy aircraft ordnance may be multiple-point suspension to ensure compatibility with airplane attachments or to stabilize the load.

5.7.1.2 Location of single-point hoisting eye. The hoisting eye shall be placed directly above the center of gravity of the combined load. Where the unit has variable center of gravity locations, separate, clearly identified locations shall be provided for the hoisting eye. If, while the load is suspended, the center of gravity will be

changed by work on the unit, a smooth-acting, simple means shall be provided for adjusting locations of the hoisting eye to level the load. Levelness shall be maintained within ±5 degrees.

5.7.1.3 Size of hoisting eye. The inside diameter of hoisting eyes interfacing with cargo hooks, etc., shall be at least 3½ inches. Hoisting eyes designed to interface with other equipment, such as aircraft or smaller hoists, may be correspondingly smaller or larger in accordance with MIL-STD-209.

5.7.2 Load attachments. All load attachments shall be as simply designed as possible, consistent with safety, and so that positive action is required to disengage them. Positive latches, spring-loaded safety hooks and

spring-loaded or self-locking nut-bolt combinations in accordance with A-A-50469 shall be used on clevises.

5.7.3 Spreader bar slings. Spreader bars shall be used, if necessary, either to obtain clearance, or when the load might be damaged by compression induced by angular suspension (particularly applicable to light structures of the type common in missiles). Minimum angle between spreader bar and member, leading to hoisting eye, shall be 30 degrees.

5.7.4 VERTREP slings. VERTREP slings and associated helicopter hookup gear shall be designed to provide a suitable insulator to avert grounding static electricity through hookup personnel. Layed rope is not acceptable. Provisions should be made to secure loose legs of a sling prior to takeoff to eliminate the hazard of entanglement. Chafe protection shall also be applied to nylon lifting eyes of hoisting slings.

5.7.5 Lifting beams. To reduce overhead clearance, consider lifting beams as an alternate to spreader bar slings. Lifting beams shall be designed to hold the load level within ±5 degrees. Further, particular attention shall be given to prevent torsional failure.

6. NOTES

(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)

6.1 Intended use.This standard is intended to provide general design criteria and guidance for handling equipment associated with weapons and other items of similar nature and should be used as the basis for preparing development specifications for such equipment. However, this standard should not be substituted for sound engineering judgment with respect to establishing specific requirements for handling equipment needed to solve unique handling situations. The need for sound engineering judgment is further emphasized in light of the elimination of many government reference documents (military specifications, military standards, etc.) from this standard in order to encourage greater use of commercial products wherever possible. The intent of this standard, therefore, is to provide sufficient information and latitude for the use of commercial products, and to define those unique requirements, such as shipboard and aircraft interface criteria, which are not likely to be found in the commercial section and require the use of the documents referenced.