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.

Pages 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 - 9 - 10 - 11 - 12 - 13 - 14 - 15 - 16 - 17 - 18 - 19 - 20 - 21 - 22 - 23 - 24 - 25 - 26 - 27 - 28 - 29 - 30 - 31 - 32 - 33 - 34 - 35 - 36 - 37

MIL-STD-1365C

TABLE I. Acceptable static safety factors and design proof loads. 4/

	Safety factors			Design proof load
	Navy	Air Force	Army	Navy	Air Force	Army
Lifting devices (metallic)	1/ 5:1 (yield)	1/ 5:1 (yield)	ANSI B30	5:1	3/	ANSI B30
Lifting devices (non- metallic)	5:1 to 10:1 2/ (ultimate)	5:1 to 10:1 2/ (ultimate)		5:1 to 10:1	3/
Stands, cradles, adapters, etc. (metallic)	3:1 (yield)	3:1 (yield)		3:1	3/
Stands, cradles, adapters, etc. (non- metallic)	4:1 (ultimate)	4:1 (ultimate)		4:1	3/
Loaders, trailers, etc.	3:1 (yield)	3:1 (yield)		3:1	3/
NOTES: 1/ Under unique circumstances, where the using environment can be determined and controlled, the 5:1 requirement may be reduced by waiver from the procuring activity. However, under no circumstances shall the requirement be less than specified by ANSI B30 (see 4.4.1.1). For chain, wire rope, and associated fittings (see 4.4.3.3). For further guidance on hoisting, adapters, trolleys, bands, etc., associated with the Single Hoist Ordnance Loading System (SHOLS), see NAWCADLKE-MISC-482600-0039. 2/ Depending on creep characteristics (see 4.4.3.1). 3/ Guidance regarding proof-load criteria for USAF equipment may be obtained from MIL-S-8512. 4/ Above guidelines represent the minimum requirements for all handling equipment, including shipping and handling systems for submarines. Refer to the applicable class specification for building submarines for additional requirements.

4.4.1.1 Load factors. When designing handling equipment, forces which impose loads in excess of the static weight of the item being lifted should be considered. These additional forces can be represented by load factors as defined in 3.1.13. Preparers of development specifications and designers should investigate the unique conditions affecting specific pieces of handling equipment to determine the value of each load factor and the cumulative value to be used in the specification and design. When the overall load factor is established, it is multiplied by the capacity to determine the dynamic load. Since the use of load factors provides a greater awareness of the using environment and the total forces acting on the handling equipment, procuring activities, at their discretion, may reduce the safety factor requirement specified in table I. However, the safety factor requirement specified in table I shall continue to be applied when the using environment cannot be controlled or when load factors are not known. Under no circumstances shall the safety factors be less than specified by ANSI B30.

4.4.1.2 Munitions trailer transportation. Designers must consider the dynamic loading imparted on stores and support equipment by munitions trailers during maximum speed, turns, and braking at maximum gross vehicle weight. For the MHU-110, MHU-141, and MHU-226 trailers, the maximum dynamic loading for design purposes is

0.5G lateral during high speed turns at minimum turn radius, 0.5G longitudinal during maximum braking, and 3.0G vertical on paved roads and the flight line environment at maximum speed. Dynamic loading for other trailers or carrier vehicles must be calculated based on maximum vehicle performance.

4.4.2 Design stresses for handling equipment not involved in lifting or hoisting. Design stresses for all metal devices where the load is being transferred to the ground or deck through the equipment shall have a safety factor of

3:1 based on the yield point of the material. Nonmetallic elements shall have a safety factor of 4:1 based on the ultimate strength of the material. Equipment for which this requirement is applicable includes, but is not limited to, assembly fixtures, dollies, support stands, and cradles.

4.4.3 Design stresses for lifting equipment. Design stresses for lifting equipment such as slings, beams, strongbacks, carriers, or any other equipment which supports a suspended load shall be in accordance with the following: