1、27 February 1973 SUPERSEDING MIL-S-28931A(MC) 13 December 1971 MILITARY SPECIFICATION SHELTERS, GENERAL PURPOSE: EXPANDABLE, TRANSPORTABLE This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope - This specification covers lightweight,
2、mobile, field expandable shelters designed for transport by military cargo truck, fixed or rotary winged aircraft, rail, ship, dolly set, or landing craft. Each shelter shall be capable of, independent transport and operation as well as deployment with another identical shelter as an. expandable com
3、plex. 1.2 Classification. The shelters shall be of the following types as specified (see 6.2): Type I - 12-foot shelter Type II - 16-foot shelter Unless otherwise specified herein, requirements shall apply to both types. 2. APPLICABLE DOCUMENTS *2.1 The following documents of the issue in effect on
4、date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS FEDERAL FF-P-101 - Padlocks, NN-P-530 - Plywood, Flat Panel. QQ -A- 20 0/8 - Aluminum Alloy Bar, Rod, Shapes, QQ-A-250/11 - Aluminum Alloy 6061, Plate and Tube and Wir
5、e, Extruded, and Structural, Shapes, 6061. Sheet - w DOCUMENT CONTARSBAGE -410 M Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-SS-G-659 TT-E-485 93-E-529 ZZ-R-765 ZZ-T-416 MILITARY MIL-P-116 MJ: 1-t-7 0 4 MIL-R-6130 MIL-W-6858 MIL-S-7 124 MIL-P-858
6、5 MIL-Cm10 578 MIL-F-14072 MIL-P-15024 MIL-E-16400 STANDARDS FEDERAL FED-SIID-406 MILITARY MIL-STD-22 MIL-STD-129 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-28933B 5LI 9999906 0235509 O MIL-STD-130 - Identification Marking Of U. S. MIL-STD
7、-202 - Test Methods For Electronic And MIL-STD-454 - Standard General Requirements MIL-STD-810 - Environmental Test Methods. Military Property. Electrical Component Parts. For Electronic Equipment. DRAWINGS ARMY ELECTRONICS COMMAND SC-D-3 64 2 3 - Hold Down Assembly. U. S. MARINE CORPS 8701578 - She
8、lter, Electronic Equipment, S-516/GRM 695175AOOOO - Shelter, Expandable Complex. 695175A0001 - Antenna Mounting Assemblyr Roof . 695175A0002 - Shelter, Expandable. 695175A0003 - Test Weight Mounting. 695175A0004 - Ladder Assembly. (Mfr. Code 17162) (Copies of specifications, standards, and drawings
9、required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer , ) 2.2 Other publications, The following documents form a part of this specification to the extent specified herein. Unless otherwise indi
10、cated, the issue in effect on date of invitation for bids or request for proposal shall apply. DEPARTMENT OF THE ARMY TB-SIG-354 Maintenance and Repair Procedures for Lightweight Field and Mobile Shelters of Aluminum Stressed Skin Foam-Core Construction (Application for copies should be addressed to
11、 the U. S. Army Adjutant General Publications Center, 1655 Woodson Road, St. Louis, Missouri 63114 . 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-28931B (MC) ASCOCIATION OF AMERICAN RAILROADS Rules Fverning Loading of Commodities on Top Ca
12、rs (Application for copies should be addressed to the Association of American Railroads, 59 Van Buren Street, Chicago, Illinois 60605.) 3, REQUIREMENTS *3ml First article. Unless otherwise specified in the contract or order (see 6.2), the contractor shall furnish one first article of each type shelt
13、er to be supplied under the contract to determine compliance with this specification. First articles shall reflect the minimum conditions to be used in production including length and amount of welds, riumber of rivets and amounts of adhesive and sealer used. 3.2 Parts and materials, Parts and mater
14、ials shall be as specified herein. Parts and materials not covered by this specification shall be the best comercial quality and the lightest practicable weight readily available in this country. In the selection of parts and materials, fulfillment of major design objectives shall bethe prime consid
15、eration. MIL-E-16400 shall be given first consideration. If the contractor can demonstrate that the use of preferred parts or materials will not fulfill the design objectives because of size, weight, performance or other reasons, parks or materials shall be used which most nearly meet or exceed the
16、performance requirements of this specification, provided the requirements of size, weight, performance or reliability wi11 not be impaired as a resdt of such substitutions, In ali. cases, the meeting of general requirements such as nonflammability, fungus resistance, mntoxicity and the meeting of en
17、vironmental conditions of this specification shall be of prime consideratian. Parts and materials conforming to 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-2893LB 54 W 9777906 02L55LL 7 W 3.2.1 Tropicalization. Tropicalization of the shel
18、ter and support equipment shall be accomplished by the selection of fungus inert parts and materials. Where the foregoing is impractical, the parts and materials shall be treated in accordance with the following. 3.2.1.1 Treatinq materials. Treating materials containing a mercury-bearing fungicide s
19、hall not be used. shall determine that the treating material is compatible with the material or surface to be treated. treating materials shall be such that any increase in flammability of treated material will be held to the practical minimum. 3.2.1.2 Toxicitv. Treating materials shall cause no ski
20、n irritation or other injury to personnel handling the treated material during fabrication, transportation, operation, or maintenance of the shelter and support equipment, or during use of the finished items when used for the purpose intended. 3.2.1,3 Flexibility. Treatment shall not affect the flex
21、ibility of treated materials to the extent that the equipment may fail to meet requirements specified hereia when subjected to the serviceconditions specified herein. 3.2.1.4 Statement of treatment. The contractor shall -suhit to the contracting officer, for approval, a state- ment describing in det
22、ail the materials to be treated and the treating materials and processes which he proposes to use. equipment shall be in accordance with MIL-STD-454, requirement 16, class 2 level of severity. different coefficients of expansion shall not be used in interrelated assemblies where dimensional change t
23、hrough the service condition temperature range specified herein has a degrading effect on equipment operation or main- tainability. The contractor Selection of 3.2.2 Metals. All metals of the shelter and its support Metals having 5 Provided by IHSNot for ResaleNo reproduction or networking permitted
24、 without license from IHS-,-,-3.2.2.1 Ferrous metals. Ferrous metals shall be corrosion resistant in accordance with the requirements specified in MIL-SED-454, requirement 15. 3.2.2.2 Aluminum. Aluminum alloys shall be in accordance with QQ-A-200/8 or QQ-A=250/11, as applicable. 3.2.3 Woad, Wooden p
25、arts used in shelter construction, such as thermal barriers, shall be Douglas fir or har650F and at ambient temperature and not less than 120 lb,E/in2 at 2000F. relative humidity at 2 OOF for 2 weeks and have a shear (c) The sealer shall withstand expsure to 100 percent strengch of 120 lbf/in 2 mini
26、mum at 20O0F. (d) After exposure to salt spray, 20 percent NaC1 solution, at 95F for 2 weeks, the sealer shall have a shear strength of 200 lbj=/in2 minimum. 3.3.2.5 Vapor seal. The inner and outer skins and all joints shall provide a vapor barrier against the entrance of moisture to the core materi
27、al and to the interior of the shelters, The vapor barrier shall be maintained intact at all cross-sectional openings of the walls, floor and roof. All joints and edges shall be assembled and treated in a manner to prevent collection and retention of moisture. All exterior rivets, screws, and fastene
28、rs shall be dipped in sealer prior to installation. 3.3.2.6 Impact strensth, The walls, roof, and floor of the shelter shall withstand impact when tested as specified in 4.9.7, After the test, there shall be no fracture or rupture of either of the skins and the inner skin shall not be dented. 10 Pro
29、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-28931B (MC) 3.3.3 Fixed floor. The exposed areas of the inside floor skin shall be covered with Scotch-Tred, or equal. The covering shall prevent flashover between top and bottom surfaces 05 the coat
30、ing with 4.9.20. The walking surface of the floor shall be sufficiently strong that no excessive resilience or permanent distortion will result from personnel walking on it with heavy field boots. wear resistant against chair legs local strength over an area-of 3 square feet to support a loading of
31、2,300 pounds when the shelter is standing in an upright position. diameter receptacle and captivated drain plug, located as indicated on Drawing No. 695175A0002. The plug shall be recessed and its receptacle shall be flush with the inner and outer surfaces of the floor panel. undersurface of the she
32、lter shall be continuous and so constructed that debris will not collect under the shelter when hauled over various types of terrain. when tested in accordance The floor shall also be The floor shall have The floor shall contain a 1-inch The exposed 3.3.4 Fixed roof. The fixed roof shall be watertig
33、ht under all weather conditions and shall be designed to support a snow and ice load of 40 pounds per square foot. The roof shall be capable of being walked upon and have sufficient strength that personnel walking with heavy field boots will not cause any delamination or excessive resilience or make
34、 heel marks or other similar permanent distortions in the roof. The outer surface of the roof shall not experience any appreciable permanent deformation and shall not puncture when the sling assembly used for helicopter lifting is dropped from its fully extended height onto the roof. loaded hand hol
35、d located in accordance with Drawifig No. The roof shall contain one spring 695175A0003. 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-S-28931B (MC) 3.3.5 ktpandable rof floor. The shelter side panel, used as a floor or roof when in the ESC
36、shall meet the following requirements, Both inside and outside skins shall be minimum 0.032-inch aluminum sheet. The panel shall have sufficient strength that personnel walking with heavy field boots will not cause any delamination or excessive resilience or make heel marks or other similar pemanent
37、 distortions in the panel. shall not exceed 220 pounds in weight for the type 1 shelter and 250 pounds for the type 11 shelter, The panel shall be watertight under all weather conditions and shall be designed to supyort: a snow and ice load of 40 pounds per square foot when used as a roof panel. Whe
38、n used as a floor, the panel shall have local strength over any area of 3 square feet to support a loading of 2,300 pounds when the shelter is standing in an upright position. for the expandable floor area. dielectric strength necessary to prevent conduction of electricity when tested in accordance
39、with 4.9.20. side panel shall be designed for use as either the floor panel or roof panel (but not both) in the ESC. The expandable roof/floor panel A mat shall be provided This mat shall have The 3.3.6 Expandable end, Additional end panels necessary to form a weathertight enclosed complex shall be
40、provided. These panels.shaL1 be part of the shelters when shelters are being transported, and shall meet all panel manufacturiq requirements specified herein. The expandable end panel shall not exceed 110 pounds in weight. *3,3.7 Door and doorway. The door and doorway shall be The doorway shall be 3
41、5-1/2 inches wide by located as indicated on Drawing No. 695175A0002 for each type shelter. 65 11/32 inches high and shall have square corners. The door shall be one section and shall be fabricated of the same material as the wall panels. The door shall have a gasket of rubber specified in 3,2.4 whi
42、ch shall be set in a channel shaped to retain the gasket without adhesive and shall be sealed with a silicone rubber sealant. The doort door frame, and gasket shall be designed to permit sealing of the door without excessive compressive set or strain upon the gasket. against which the door gasket se
43、als, shall lay in a single plane. An air inlet in accordance with 3.3.14.1 shall be provided. Additional stowage brackets shall be added to the personnel door to accommodate the ladder when the shelter is transported on the M832 Dolly Set. The surface of the shelter, 12 Provided by IHSNot for Resale
44、No reproduction or networking permitted without license from IHS-,-,-MIL-S-2893LB 5Li = 9977906 02L55L9 3 W MIL-S-28931B (MC) 3.3.7.1 Door hardware. Hardware shall be attached so that the door cannot be opened or removed from outside by means of a screwdriver or wrench or by means other .than breaki
45、ng of parts when door is padlocked. 3.3.7.2 Lockinu and latchinu devices. The latching device for the door shall be a three-point, roller-cam mechanism. The roller cams shall be activated simultaneously by handles provided on the exterior and interior of the door. A method of unlocking the door for
46、emergency exit from the inside shall be provided. 3.3.7.3 Padlocks, A padlock, size 1-1/2 inches, with chain, in accordance with type EF of FF-P-101, shall be supplied for the door. of keys shall be as specified by the procuring activity (see 6.2). The padlock coding and the number 3.3.7.4 Door load
47、s. When the door is open, the door, door frame, and door hardware shall withstand a wind gust load of 20 pounds per square feet and vehicular trans- portation shocks. The door shall be hinged at five points and shall be capable of supporting 200 pounds applied at the maximum distance from hinge line
48、 with the door open. shimmed or adjusted to apply proper pressure to the gasket. skins to provide strong mounting points for all door hardware. Hinge parts and their attachments shall be made so that they cannot be removed from the outside of the shelters. 100 degrees. The hinges shall be a type whi
49、ch can be Reinforcing pieces shall be used between panel The travel of the door shall be limited to 3.3.8 Roof access steps. Three folding steps and handholds to provide access to the roof shall be provided on the fixed side wall of the shelter as shown on Drawing No. 695175A0002. They shall be recessed in an aluminum pan for flush mounting. a vertical load of 400 pounds applied to the outermost point of the unfolded- s
