1、Designation: E1925 10Specification forEngineering and Design Criteria for Rigid Wall RelocatableStructures1This standard is issued under the fixed designation E1925; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last
2、revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This specification covers engineering and
3、design criteriarequired for the development of rigid wall relocatable struc-tures (RWRS) and shall be applied to the design of expandableand nonexpandable RWRSs. This specification applies topresent engineering and design requirements for effectiveRWRSs that are operable in a variety of environments
4、 withoutdegradation and are capable of all specified transport modes.This specification shall be applied to the design of expandableand nonexpandable RWRSs. This specification is a conversionof a military standard that was approved by all departments andagencies of the Department of Defense.1.2 The
5、values stated in inch-pound units are to be regardedas standard. The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 The following safety hazards caveat pertains only to thetest required portion, Section 10
6、, of this specification. Thisspecification does not purport to address all of the safetyconcerns, if any, associated with its use. It is the responsibilityof the user of this specification to establish appropriate safetyand health practices and determine the applicability of regu-latory limitations
7、prior to use.2. Referenced Documents2.1 ASTM Standards:2E1851 Test Method for Electromagnetic Shielding Effec-tiveness of Durable Rigid Wall Relocatable StructuresG21 Practice for Determining Resistance of Synthetic Poly-meric Materials to Fungi2.2 ISO Standards:3ISO 668-1995 Series 1 Freight Contai
8、ners - Classification,Dimensions and Ratings, 5th EditionISO 1161-1990 Series 1 Freight Containers - Corner Fit-tingsISO 1496-1 Series 1 Freight Containers Specification andTesting Document - Part 1, 1993ISO 1496-2 Series 1 Freight Containers Specification andTesting Document - Part 2, 19932.3 Milit
9、ary Standards:4MIL-STD-1472D Notice 3, Human Engineering DesignCriteria for Military Systems, Equipment and FacilitiesMIL-F-14072D Finishes for Ground Electronic EquipmentMIL-C-22992E Amend 5, Connector, Plugs and Recep-tacles, Electrical, Waterproof, Quick Disconnect, HeavyDuty Type General Specifi
10、cation forMIL-STD-810 Environmental Engineering Considerationsand Laboratory TestMIL-STD-1791 Notice 1, Designing for Internal AerialDelivery in Fixed Wing Aircraft2.4 SAE Standards:5SAE-AS8090 Mobility, Towed Aerospace Ground Equip-ment, General Requirements for3. Terminology3.1 Definitions:3.1.1 d
11、egradationdamage by the weakening or loss ofsome property, quality, or capability.3.1.2 delaminationseparation into constituent layers.3.1.3 galvanic corrosionthe corrosion of metallic objectsin the presence of moisture, caused by electrolytic action.3.1.4 special toolstools other than common hand t
12、ools orthose designed specifically for use with a delivered product.1This specification is under the jurisdiction of ASTM Committee E06 onPerformance of Buildings and is under the direct responsibility of SubcommitteeE06.53 on Materials and Processes for Durable Rigidwall Relocatable Structures.Curr
13、ent edition approved Oct. 1, 2010. Published October 2010. Originallyapproved in 1997. Last previous edition approved in 2004 as E1925 04. DOI:10.1520/E1925-10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of
14、 ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.4Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,Sect
15、ion D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http:/dodssp.daps.dla.mil.5Available from SAE International (SAE), 400 Commonwealth Dr., Warrendale,PA 15096-0001, http:/www.sae.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United State
16、s.4. Materials and Manufacture4.1 Materials and WorkmanshipAll materials and work-manship shall be in accordance with good commercial practice.All materials shall be recovered materials to the maximumextent possible consistent with quality and performance. Allmaterials shall be free of defects that
17、would affect the perfor-mance or maintainability of individual components or theoverall assembly adversely.4.2 Dissimilar MaterialsThe intimate contact of dissimi-lar materials, which can be expected to cause galvanic corro-sion, shall be prevented. When such contact cannot be pre-vented, an insulat
18、ing material shall be provided to minimizethe corrosive effect.4.3 CorrosionAll RWRS components shall be adequatelyprotected from corrosion in accordance with MIL-F-14072D.The use of dissimilar metal combinations shall be avoidedwhenever possible. The selection of permissible couples shallbe in acco
19、rdance with the compatible couples table of MIL-F-14072D. If, due to special conditions of service or design, thecontractor considers that finishes, processes, or materials otherthan those specified herein are necessary or more suitable, suchfinishes, processes, or materials may be used.4.4 Toxicity
20、The materials (in their cured state) used shallcause no skin irritations or other injury to personnel handlingthe material during transportation, operation, or maintenance ofthe equipment. Exposure of personnel to toxic substances shallnot be in excess of the threshold values contained in theAmerica
21、n Conference of Government Industrial HygienistsThreshold Limit Values.5. General Requirements5.1 ObjectivesThe RWRS shall be designed and built towithstand a variety of environments while providing an effec-tive and reliable facility for system equipment. The designshall also be directed toward min
22、imizing the man-hoursrequired to strike or erect RWRSs using common hand tools.5.2 StandardizationThe design and engineering require-ments specified herein are designed to encourage standardiza-tion of RWRSs. Existing performance and test criteria havebeen used to the maximum extent possible.5.3 Sim
23、plicity of DesignThe RWRS shall represent thesimplest design consistent with functional and performancerequirements, expected service conditions, and structure life.5.4 RWRS Life, Reliability and MaintainabilityThe designlife for a typical structure shall be 15 years.6. Physical Properties Requireme
24、nts6.1 Interchangeability of PartsLike units, assemblies,sub-assemblies, and replaceable parts shall be physically andfunctionally interchangeable without modification of eithersuch items or the unit. Demonstration of the interchangeabilityof selected panels and hardware shall be conducted.6.2 Speci
25、al ToolsThere shall be no special tools or equip-ment required to erect or strike RWRSs. Standard hand toolsmay be provided as required.6.3 Physical SecurityA means shall be provided to secureall openings, folding panels, and removable components inorder to prevent unauthorized entry.6.4 Lighting Pr
26、ovisionIf lighting is installed as part of thebasic RWRS, all RWRS tests shall be conducted with suchprovisions installed.6.5 Electrical GroundingThe RWRS electrical systemshall be grounded through electrical input cable back to thepower source ground.6.6 Input-Output Panels and OpeningsAll RWRS tes
27、tsshall be conducted with the panels and openings installed ifinput-output panels and openings are installed as part of thebasic RWRS.6.7 Electrical Power ConnectorWhen an electrical powerconnector is provided as part of the basic design of anonexpandable or expandable RWRS, that connector shall be
28、aclass L connector in accordance with MIL-C-22992E.6.8 Lightning ProtectionA separate grounding system forlightning protection shall be designed for the RWRS.6.9 Human Engineering and SafetyThe provisions ofMIL-STD-1472D applicable to RWRSs shall be implemented.7. Performance Requirements7.1 Air Tra
29、nsportabilityThe air transportability of allRWRS shall comply with the guidelines of MIL-STD-1791.See 10.2 for verification test.7.2 Ground MobilityThe RWRS shall be capable ofwithstanding the shocks and vibrations induced by groundtransport equipment over the mobility courses described forType V mo
30、bility in SAE-AS8090. See 10.3 for verification test.7.3 Rail TransportabilityThe RWRS shall be capable ofwithstanding the shocks induced by rail transport withoutdamage. See 10.4 for verification test.7.4 Forklift HandlingThe RWRS shall be capable ofwithstanding the stresses of forklift movements o
31、r shall bemarked “DO NOT FORKLIFT.” See 10.5 for verification test.7.5 Erecting and StrikingErecting and striking expand-able and nonexpandable RWRS shall be accomplished withintwo man-hours per 150 square feet (ft2) (14 m2) of floor space.The RWRS shall be capable of being erected and struck on asu
32、rface that has up to a 24-in. (610-mm) differential in grade tothe diagonal dimension of the RWRS floor. See 10.6 forverification test.7.6 Weather SealsWeather seals shall be designed to be anintegral part of the RWRS and shall be designed to be readilyreplaceable by user in the field without the us
33、e of special tools.This requirement shall be verified by demonstration.7.7 AirtightnessThe RWRS shall not permit air leakage ineither the shipping or operational configuration, as specified in10.7 and 10.8 verification test.7.8 BlackoutThe RWRS shall not permit light emissionwith the doors closed, i
34、n an operational mode. See 10.9 forverification test.7.9 IceThe RWRS design shall not permit water accumu-lation in pockets, creases, fissures, and so forth, which couldcause structural damage upon freezing. The operation ofmoveable RWRS components shall not be impaired unduly bythe formation of ice
35、 anywhere on the RWRS structure. Thisrequirement shall be validated by analysis.E1925 1027.10 Wind Velocities (Load)When tied down, the RWRSshall withstand winds up to 100 mph (160 km/h) steady state,with gusts up to 120 mph (190 km/h). This requirement shall bevalidated by analysis.7.11 Altitude (L
36、ow Pressure)The RWRS shall use devicespermitting air passage and allowing pressure equalization topreclude damage to the RWRS. At least a total of 12 in.2ofvent area for each 10 ft length (2500 mm2of vent area for eachmetre length), or fraction thereof, or RWRS shall be provided.This requirement sha
37、ll be verified by analysis.7.12 Humidity ResistanceThe RWRS shall withstanddaily exposure of up to 97 % relative humidity for 20 h andexposure of 100 % relative humidity (with condensation) for 4h. See 10.10 for verification test.7.13 Marine Corrosion ResistanceThe RWRS shall befully serviceable whe
38、n exposed to a salt environment asspecified in 10.11. All hardware including fasteners, jacks, andseals shall show no evidence of corrosion or degradationfollowing 96 h of exposure to this simulated environment. See10.11 for verification test.7.14 Temperature RangeIn storage, the RWRSs shall becapab
39、le of withstanding exposure to temperatures of 70 to160F (57 to 71C). In transit, the RWRSs shall be capable ofwithstanding exposure to temperatures of 65 to 160F (54 to71C) with personnel access at low end of range. Operationaltemperature of RWRS shall be 40 to 120F (40 to 49C). See10.12 for verifi
40、cation test.7.15 Solar Loads Assembled RWRSThe RWRS shallwithstand a simulated solar load outer skin temperature of205F (96C) while internal temperature is maintained at 85F(29C). See 10.13 for verification test.7.16 Temperature ShockRWRS panels, windows, andother components shall withstand a temper
41、ature shock from160 to 70F (71 to 57C) without separation, delaminationcracks, or degradation. See 10.14 for verification test.7.17 Heat TransferThe RWRS shall have an overall heattransfer coefficient less than or equal to 0.35 Btu/(h*ft2*F)(2.0W/(m2*K), in the operational configuration. Heat transf
42、ercoefficient for nonexpandable shelters shall be less than orequal to 0.35 Btu/hr-ft2*F in the transport configuration. See10.15 for verification test.7.18 Blowing SandThe external moving parts of theRWRS in transport or operational mode shall be designed toresist the effects of blowing sand. Exter
43、nal moving parts shallbe designed to operate and withstand particle concentrations of1.32 3 104lb/ft3(2.19 g/m3) with a wind velocity of 1750 6250 ft/min (8.9 6 1.3 m/sec) without degradation. Suchparticles shall range in size from 6 3 103in. (150 m) to 4 3102in. (1000 m). Relative humidity shall be
44、 less than 23 %.See 10.16 for verification test.7.19 Sunshine (Ultraviolet Effects)Ultraviolet effectsshall neither significantly degrade nor affect the serviceabilityof RWRS components or materials for the service life of theRWRS. See 10.17 for verification test.7.20 Flame ResistanceThe RWRS shall
45、be designed to beflame resistant. See 10.18 for verification test.7.21 FungusThere shall be no degradation of RWRScomponents due to fungus growth. Materials shall be selectedto minimize fungal growth. See 10.19 for verification test.7.22 RWRS SquarenessThe RWRS must be squared sothat in any two inte
46、rsecting fixed RWRS wall, floor, or roofpanels, the inside panel surface in one panel shall be mutuallyperpendicular to the inside surface of the adjacent panel within116 in. (2 mm) when measured with a 36-in. (900 mm) squarewhose two edges are perpendicular to each other within 0.005in. (0.1 mm). T
47、his requirement does not apply to curved wallshelter designs. Outside and inside skin temperatures shall bewithin 5F (3C) of the same temperature when this is verified.See 10.20 for verification test.7.23 Panel FlatnessPanel surfaces shall not be cupped orbowed in excess of 0.125 in. (3 mm) when mea
48、sured with a48-in. (1300-mm) long straight edge. Outside and inside skintemperatures shall be within 5F (3C) of the same temperaturewhen this is verified. This requirement does not apply to curvedwall shelter designs. See 10.21 for verification test.7.24 Roof LoadsThe roof assembly of the RWRS shall
49、withstand a snow load of 40 lb/ft2(200 kg/m2) and a personnelload of 660 lb (300 kg) static over 2 ft2(0.2 m2). See 10.22 forverification test.7.25 Floor LoadsThe RWRS floor shall be capable ofsupporting a uniform load of 65 lb/ft2(320 kg/m2). The RWRSfloor shall be capable of supporting a concentrated load of 2000lb (900 kg) over a 4-ft2(0.4-m2) area at the center of the floor.The floor shall also be capable of supporting a point load of125 lb over a 1 in. square area (57 kg over a 650-mm2area).The l
