1、MIL-F-4425LA 83 7777706 0437478 L I INCH-POUND MIL-F-4425 1 A 20 February 1990 SUPERSEDING MIL-F-44251 20 November 1986 MILITARY SPECIFICATION FRAME SECTIONS, TENT, EXTENDABLE, MODULAR, PERSONNEL (TEMPER) This specification is approved for use by all Departments and Agencies of the Department of Def
2、ense. 1. SCOPE 1.1 Scope. This specification covers the frame sections of an extendable frame type personnel modular tent with covers. 1.2 Classification. The frame sections shall be of the following types and classes as specified (see 6.2): Type I - Frame end section Type II - Frame extendable sect
3、ion Type III - Frame extendable door section Class 1 - Frame sections supplied with folding arch assemblies which Class 2 - Frame sections supplied with sectionalized folding arch allow a wrapped length of 113 inches. assemblies which allow a wrapped length of 98 inches 2. APPLICABLE DOCUMENTS 2.1 G
4、overnment documents. 2.1.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those listed in the issue of the Department of Defens
5、e Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: U.S. Army Natick Research, Developme
6、nt, and Engineering Center, Natick, MA 01760-5014 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA FSC 8340 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. Provided
7、by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. I- MIL-F-qLIZSLA 3 - 9797906 OL1L7q99 3 - MIL-F-442 5 1 A SPECIFICATIONS FEDERAL DDD-L-20 - Label: For Clothing, Equipage, and Tentage, (General PPP-B-60 1 - Boxes, Wood, Cleated-Plywood PPP-B-636 - Boxes, Shi
8、pping, Fiberboard PPP-B-640 - Boxes, Fiberboard, Corrugated, Triple-Wal Use) MIL I TARY MIL-C-5541 - Chemical Conversion Coatings on Aluminum and Aluminum i Alloys Res ist ant s MIL-C-46168 - Coating, Aliphatic Polyurethane, Chemical Agent MIL-P-53022 - Primer, Epoxy Coating, Corrosion Inhibiting, L
9、ead and Chromate Free STANDARDS FEDERAL FED-STD-751 - Stitches, Seams, and Stitchings MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by MIL-STD-129 - Marking for Shipment and Storage MIL-STD-130 - Identification Marking of U.S. Military Property Attributes (Unless otherwise ind
10、icated, copies of federal and military specifications, standards, and handbooks are available from the Standardization Documents Order Desk, Bldg. 4D, 700 Robbins Avenue, Philadelphia, PA 19111-5094.) 2.1.2 Other Government documents, drawings, and publications. The following other Government docume
11、nts, drawings, and publications form a part-of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWINGS (see 6.4) U.S. ARMY NATICK RESEARCH, DEVELOPMENT, AND ENGINEERING CENTER 5-4-3330 - Frame Sections for Tent, Extendable, M
12、odular, Personnel 5-4-3331 - Binding Strap Assembly (TEMPER) 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-LI425LA 83 W 7777906 0437500 b W MIL-F-4425 1 A 5-4-3332 - Side Arch Assembly 5-4-3333 - Roof Arch Assembly 5-4-3334 - Roof Arch Asse
13、mbly, Ridge Gusset 5-4-3335 - Header Assembly 5-4-3336 - Purlin Assembly 5-4-3337 - Door Sill Assembly 5-4-3338 - Arch Assembly 5-4-3339 - Foot 5-4-3340 - Ridge Extender Assembly 5-4-3341 - Eave Extender Assembly 5-4-3342 - Hitch Pin Clip and Holder 5-4-3343 - Vestibule Frame Assembly 5-4-3344 - Upr
14、ight 5-4-3345 - Header 5-4-3346 - Pin Assembly 5-4-3347 - Frame Sections Cover Assembly 5-4-3358 - Erection Instructions 5-4-4006 - Arch Assembly, Sectionalized 5-4-4007 - Roof Arch Assembly, Ridge Gusset, Sectionalized 5-4-4008 - Roof Arch Assembly, Sectionalized 5 -4-4009 - Connect or 5-4-4154 - P
15、in, Quick Release with Lanyard Assembly 5-4-4155 - Pin, Quick Release 5-4-4156 - Tab 5-4-4157 - Lanyard Assembly (Copies of drawings are available from the U.S. Army Natick Research, Development, and Engineering Center, ATTN: STRNC-EMSS, Natick, MA -01760-5014.) 2.2 Non-Government publications. The
16、following documents form a part of this Unless otherwise specified, the issues document to the extent specified herein. of the documents which are DOD adopted are those listed in the issue of the DODISS cited in the solicitation. Unless otherwise specified, the issues of documents not listed in the
17、DODISS are the issues of the documents cited in the solicitation (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) B 633 D 395 - Electrodeposited Coatings of Zinc on Iron and Steel - Standard Practice for Commercial Packaging (Application for copies should be addressed to the American Soc
18、iety for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103-1187.) (Non-Government standards and other publications are normally available from organizations that prepare or distribute the documents. These documents also may be available in or through libraries or other informational se
19、rvices.) 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- VIL-F-qq25LA 83 W 7797706 04L7501 8 W MIL-F-44251A 2.3 Order of precedence. In the event of a conflict between the text of this document and the references cited herein, the text of this-doc
20、ument takes precedence. regulations unless a specific exemption has been obtained. Nothing in this document, however, supersedes applicable laws and 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection (see 6.31, in accordance wlth 4.3.
21、 3.2 Materials and components. Materials and components shall be as specified herein and on the applicable drawings. Materials not definitely specified shall be of the quality normally used by the contractor provided that the completed item complies with all provisions of this document. It is encour
22、aged that recycled material be used when practical as long as it meets the requirements of this specification. II O 3.2.1 Primer. Primer shall conform to MIL-P-53022. 3.2.2 Coating. Coating shall be camouflage green 383 conforming to MIL-C-46168. 3.2.3 Thread, polyester. Dyed thread shall show color
23、fastness to weathering equal to or better than the standard shade sample. sample is available, the dyed thread shall show “good“ colorfastness to weather- ing. Thread sizes shall be as follows: When no standard shade For all stitching except bartacking and stitching indicated by “Z“ on drawings - Si
24、ze FF or F for needle and bobbin For bartacking - Size E For stitching indicated by “2“ on drawings - Size F for needle, size E for looper 3.2.4 Buckle, double bar with lip. The double bar buckle with lip shall conform to the 1-inch, No. 789 steel Waterbury buckle or equal (see 6.5 and Drawing 5-4-3
25、331). 3.3 Alternate components. Components shall be as specified on the applicable For components for which it is stated “or drawings and as specified herein. equal,“ if the contractor proposes to use an item considered to be equal to the component specified, prior to its use the contractor shall fu
26、rnish a sample of the component with supporting data to the contracting officer for subsequent evaluation by the responsible military agency. The supporting data required shall prove the functional equivalence and design compatibility of the item proposed to be used. Prior to manufacture of the firs
27、t article, or if none is 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-44253A 83 7777706 0437502 T MIL-F -44 2 5 1 A required, prior to commencing production, the contractor shall submit for the contracting officers approval, a list identif
28、ying each proposed alternate component together with proof that each listed component complies with requirements -specified herein. require a physical sample of the proposed substitution. submitted listing, together with necessary supporting data, authorizes the commencement of first article manufac
29、ture, as applicable, and does not relieve the contractor of the responsibility that these components perform in accordance with specified requirements when incorporated into the end product. The contracting officer, at his option, may Approval of the 3.4 Construction. Construction of the frame secti
30、ons shall conform to the drawings listed in section 2 of this document and shall be as specified herein. The frame sections shall be capable of being erected and the stud brace shall be capable of being turned within the pad brace by hand without having to use a tool for force. The diagonal brace an
31、d shackle brace shall be capable of being rotated by hand. the ends of the hinge pin securely into the countersink of the eave gusset plates so as to prevent the hinge pin from becoming loose and disengaged. Heating of the hinge pin is allowed to facilitate upsetting 3.4.1 Welding. All welding shall
32、 be sound, smooth, uniform, and as specified. 3.4.2 Riveting. All rivets shall be securely set. 3.4.3 Castings. Castings shall be clean and free from pits, blowholes, and scale. 3.4.4 Stitching, machine. 3.4.4.1 Types of stitching. All stitch types, except bartacking, shall conform to FED-STD-751 as
33、 follows: For all stitching except stitching indicated by “Z“ on drawings inch - Type 301, 5 to 7 stitches per For stitching indicated by “Z“ on draw i ngs For bartacking - Type 401, 5 to 7 stitches per inch. Chain portion of stitch- ing shall appear outside of covers - Bartack, 5/8 plus or minus 1/
34、16 inch long, 1/8 inch minimum bight, and shall contain 28 s ti t ches 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-_ MIL-F-4425LA 83 m 7799906 0427503 I m 3.4.4.2 Type 301 stitching. Ends of all stitching shall be backstitched or overstitched 1
35、 inch minimum except when caught in other stitching or turned under in a hem. loose stitching resulting in puckering of material sewn. The lock shall be embedded in the mater-ia1 sewn. Repairs of type 301 stitching. Thread tension shall be maintained so that there will be no 3.4.4.2.1 Repairs of typ
36、e 301 stitching shall be as follows: .i a. When thread breaks or bobbin run-outs occur during sewing, the stitching shall be repaired by restarting the stitching a minimum of 1 inch behind the end.of the stitching. L/ b. Thread breaks or two ormore consecutive skipped or run-off stitches 0 noted dur
37、ing inspection of the item (in-process or end item) shall be repaired by overstitching. The stitching shall start a minimum of 1 inch befre the defective area (1/2 inch on box, box and cross andW-W stitching) and continue a a minimum of 1 inch beyond the defective area onto the existing stitching, o
38、r excessively tight stitching shall be repaired by removing the defective stitching, without damaging the materials, and restitching in the required manner. L/ Loose i/ When making the above repairs, the ends,of the stitching are not required to be backstitched. 3.4.4.3 Type 401 stitching. Thread te
39、nsion shall be maintained so that there will be no loose stitching. Both ends of all seams or stitching produced with a 401 stitch type, when not turned under in a hem or held down by other stitching, shall have a 1/2 to 3/4 inch chain extending beyond eachend. The looper (under thread) shall always
40、 be on the inside of the cover. All repairs shall be made in accordance with 3.4.4.2.1a or 3.4.4.2.1b. stitch type. Repairs may be madeusing a 301 3i4.4.4 Automatic stitching. Automatic stitching machines may be used to perform any of the required stitch patterns provided the requirements for the st
41、itch pattern, stitches per inch, size and type of thread are met, and at least three or more tying, overlapping, or backstitches are used to secure the ends of stitching. 3.4.4.5 Lubrication of thread. The addition of any lubricant to the polyester thread prior to or during the sewing operation is p
42、rohibited. 3.5 Finish. Interior surfaces of rectangular tubes, where slotted or diagonally cut at end, and shank of through rivets need not be primed or painted. painted. Nonstructural rivets installed after treatment and painting need not be primed or painted (Ref: Drawing 5-4-3336, items 17 and 18
43、, Drawing 5-4-3337, items 22 and 23, Drawing 5-4-4006, items 9 and 10, and Drawing 5-4-3338, items 9 and 10) . Flexible nylon coated cables and hitch pin chip assemblies need not be 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-F-4425LA 83 39
44、9990b 04L7504 3 MIL-F-4425 1 A 3.5.1 Plating. All steel components on frame other than corrosion resistant steel shall be zinc-coated conforming to type II, SC3 of ASTM B 633 prior to treatment and coating unless otherwise specified on the drawings. 3.5.2 Cleaning and treatment. Prior to assembly, a
45、ll completely fabricated aluminum components shall be thoroughly clean and the exterior surfaces of all aluminum shall be prepared for painting in accordance with class 1A treatment of MIL-C-5541. When a class 2 frame section is specified, the connectors for each sectionalized arch shall be treated.
46、 3.5.3 Priming. After cleaning and treatment, as applicable, and prior to assembly, exterior surfaces of metal components including rings, screws, plus completely coated with primer specified in 3.2.1. release pin and connector (Drawing 5-4-4009) (class 2 only) when used shall be free of primer. bot
47、h sides of steel eave and ridge gusset-plates and header end plates, shall be The shank of the quick 3.5.4 Coating. After the primer has been allowed to dry, the exterior surfaces of the assembled frame section components shall be completely coated with coating specified in 3.2.2. The shank of the q
48、uick release pin and connector (Drawing 5-4-4009) (class 2 only) shall be free of coating. The finish coating shall be continuous and uniform, e.g., free of sag, run, pinhole, blister, wrinkle, area of thin or no film, scratch or scuff, foreign matter imbedded in finish, and wet or tacky paint. The
49、contractor shall touch up areas of finish damaged during flexing of movable joints. 3.6 Marking. 3.6.1 Indentification. The lower segment of each side arch assembly having the binding strap shall be permanently and distinctly stamped or marked for identification. The letters “U.S.“ shall be in characters a minimum of 1 inch in height. The name of the manufacturer or brand name or mark of such known character as to make the source of manufacture determinab
