1、NIL-C-L3LIBLB 39 9779906 0283432 2 m, MIL-C-13481B SUPERSEDING MIL-C-13481A 23 March 1966 18 August 1983 MILITARY SPECIFICATION CLAMPS, BEM, RIGGERS ? C “ This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. 1.2 Classification. Clam
2、ps shall be the following sizes, as specified This specification covers one type of riggers beam clamp. (see 6.2): Size 1 - 10,000 pounds, safe working load Size 2 - 20,000 pounds, safe working load 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. ” ing specifica
3、tions and standards of the b* ment of Defense Index of Specifications solicitation form a part of this specif .t ,. Unless otherwise specified, the follow- issue listed in that issue of the Depart- and Standards (DODISSI specified in the cation to the extent specified herein. Beneficial comments (re
4、commendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: USA Mobility Equipment Research and Development Command, ATTN:_- DRDME-DS, Fort Belvoir , VA 22060 by *sing the self-addressed Standardi with Appropriate Test Methods. -
5、 Commercial Packaging of Supplies and Equipment. (Copies of specification and standards required by contractors in connection with specific acquisition functions should be obtained from the contracting activity or as directed by the contracting officer.) 2.2 Other publications. The following documen
6、t forms a part of this specifi- n r $. cation to the extent specified herein. indicated as DoD adopted shall be the issue listed in the current DoDISS and The issue of the document which is the supplement thereto, if applicable. 5 AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM A 675 - Steel
7、Bars, Carbon, Hot-Wrought, Special Quality, Mechanical Properties. (Application for copies should be addressed to the American Society for Testing and Materials, 1916 Race Street, Philadelphia, PA 19103.) (Industry association specifications and standards are generally available for reference from l
8、ibraries. and using Federal agencies.) They are also distributed among technical groups 2 Licensed by Information Handling Services-. _Lu_- I MIL-C-L348LB 37 7977706 0283434 6 m MIL-C-13481B 2.3 Order of precedence. In the event of a conflict between the text of this specification and the references
9、 cited herein, the text of this specification shall take precedence. 3. REQUIREMENTS 3.1 Description. The clamp shall be as shown in figure 1 and as specified herein. The throat of the clamp shall be formed by hot-bending. 3.2 First article. When specified (see 6.21, a sample shall be subjected to t
10、he first article inspection (see 4.3 and 6.3). 3.3 Material. Components shall be fabricated from hot rolled carbon steel conforming to ASTM A 675, grade 70. Material shall be new and unused. 3.3.1 Material deterioration and control. The clamp shall be fabricated from compatible materials, inherently
11、 corrosion resistant or treated to provide protection against the various. forms of corrosion and deterioration that may be encountered in any of the applicable storage and operating environment to which the item may be exposed. 3.3.1.1 Dissimilar metals. Dissimilar metals shall not be used in intim
12、ate contact with each other unless protected against galvanic corrosion. metals and methods of protection are defined and detailed in MIL-STD-889. Dissimilar * 3.3.1.2 Identification of materials and finishes. The contractor shall identify the specific material, material finish or treatment for use
13、with components and sub-components, and shall make information available, upon request, to the con- tracting officer or designated representative. 4 4 3.4 Capacities. The clamp shall withstand a proof load equal to twice the following safe working loads without permanent deformation, cracks, permane
14、nt set, or splits in any component. Size 1 - 10,000 pounds. Size 2 - 20,000 pounds. 3.5 Finish. Unless otherwise specified (see 6.21, clamps shall have a commercial hot-rolled finish. 3.6 Identification marking. Clamps shall be legibly die-stamped with the manufacturers name or tradename , “US“ , an
15、d the safe working load. 3.7 Workmanship. All components of the clamps including forgings, stampings, machined surfaces and welded parts shall be clean and free from dirt, fins, pits, sprues, scale, flux, and other harmful extraneous material. All edges shall be rounded or chamfered. The surfaces of
16、 all parts to be welded shall be free from scale, grease, and other foreign.matter. 3 08 P Licensed by Information Handling ServicesMIL-C-13481B 4. QUALIm ASSURANCE PROVISIONS 4.1 Responsibility for inspection. Unless-otherwise specified in the con- tract or purchase order, the contractor is respons
17、ible for the performance of all inspection requirements as specified herein. in the contract or purchase order, the contractor may use his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Government re
18、serves the right to perform any of the inspections set forth in the specification where such in- spections are deemed necessary to assure supplies and services conform to pre- scribed requirements. Except as otherwise specified 4.1.1 Components and material inspection. The contractor is responsible
19、for insuring that components and materials used are manufactured, examined, and tested in accordance with referenced specifications and standards, as applicable. 4.2 Classification of inspections. The inspection requirements specified herein are classified as follows. a. b. First article inspection
20、(see 4.3). Quality conformance inspection (see 4.4). c. Inspection of packaging (see 4.6). 4.3 First article inspection. 4.3.1 Examination. The first article clamp shall be examined as specified in 4.5.1. Presence-o-f one or more defects shall be cause for rejection. 4.3.2 - Test. The first article
21、clamp shall be tested as specified in 4.5.2. Failure of the test shall be cause for rejection. 4.4 Quality conformance inspection. 4.4.1 Sampling. Sampling for examination and tests shall be in accordance with MIL-STD-105. 4.4.2 Examination. 4.4.2.1 Individual. Each clamp shall be examined for the c
22、ritical defect Presence of a critical defect shall be cause for rejection. specified in 4.5.1. 4.4.2.2 Samples. Samples selected in accordance with 4.4.1 shall be examined as specified in 4.5.1. and 6.5 percent defective for minor defects. AQL shall be 2.5 percent defective for major defects 4 c ? t
23、 Licensed by Information Handling ServicesflIL-C-13qBLB 39 m 9999906 0281436 T mi I MIL-C-13481B 4.4.3 Tests. 4.4.3.1 Samples. as specified in 4.5.2. Samples selected in accordance with 4.4.1 shall be tested AQL shall be 2.5 percent defective. . 4.5 Inspection procedure. 4.5.1 Examination. The clamp
24、s shall be examined as specified herein for the following defects: Critical 1. Splits or cracks in any part of clamp. Major 101. 102. 103. 104. 105. 106. Minor 201. 202. Materials not as specified or the materials are not resistant to corrosion or de.terioration or treated to be made resistant to co
25、rrosion or deterioration for the applicable storage and operating environment. Contractor does not have documentation available for identification of material, material finishes or treatments. Dissimilar metals as defined in MIL-STD-889 are not effectively insulated from each other. Components missi
26、ng or not as specified. Nonconformance to dimensions shown in figure 1. Workmanship not as specified. Finish not as specified. Identification marking missing, incomplete, or illegible. 4.5.2 Proof test. Fasten the clamp to a channel beam or in a testing machine. Apply the proof load specified in 3.4
27、 to the shackle hole. 3.4 shall constitute failure of this test. Nonconformance to 4.6 Inspection of packaging. 4.6.1 Quality conformance inspection of pack. 4.6.1.1 Unit of product. For the purpose of inspection, a completed pack prepared for shipment shall be considered a unit of product. 5 Licens
28、ed by Information Handling ServicesMIL-C-L34BLB 39 9999906 0283q37 L i-! ,. I MIL-C-13481B 4.6.1.2 Sampling. Sampling for examination shall be in accordance with MIL-STD-105. 4.6.1.3 Examination. Samples selected in accordance with 4.6.1.2 shall be examined for the following defects. AQL shall be 2.
29、5 percent defective. 107. 108. Containers not as specified for level A or B. 109. 110. 111. Strapping not as specified for level A. 112. 113. Marking missing, illegible, incorrect, or incomplete for level A, Preservative not applied as specified for level A. Clamps of unlike size packed together for
30、 level A or B. Clamps not immobilized within the container for level A or B. Preservation and packing not in accordance with the referenced document as specified for commercial. B or commercial. 5. PACKAGING 5.1 Preservation. Preservation shall be level A or commercial as specified (see 6.2). 5.1.1
31、Level A. Threaded surfaces of the bolt and any other unpainted surfaces of the clamp shall be coated with type P-1 preservative conforming to the appli- cable specification listed in and shall be applied in accordance with MIL-P-116, 5.1.2 Commercial. The clamps shall be preserved in accordance with
32、 MIL-STD-1188. 5.2 Packing. Packing shall be level A, By or commercial as specified (see 6.2). 5.2.1 Level A. The clamps of like size, preserved as specified in 5.1, shall be packed in close-fitting boxes conforming to PPP-B-601, overseas type, style optional; or PPP-B-621, class 2, style optional,
33、in quantities not to exceed the weight limitation of the box. The clamps shall be immobilized within the boxes by blocking, bracing, and anchoring in accordance with MIL-STD-1186. Box closure and strapping shall be in accordance with the appendix to the appli- cable box specification. Strapping shal
34、l conform to QQ-S-781, class 1, type I or IV, size as applicable. Unless as otherwise specified strapping shall be finish B. When specified (see 6.21, strapping shall be finish A. 5.2.2 Level B. The clamps shall be packed as specified in 5.2.1, except the boxes shall be domestic type or class as app
35、licable. Box closure and strapping shall be in accordance with the appendix to the applicable box specifi- cat ion. i 6 Licensed by Information Handling ServicesMIL-C-13481B 39 m 7979906 0281438 3 Il MIL-C-13481B 5.2.3 - Commercial. 5.3 Marking. 5.3.1 Military. The clamps shall be packed in accordan
36、ce with MIL-STD-1188. Marking for military levels of protection (level A or B) shall be in accordance with MIL-STD-129. 5.3.2 Commercial. Marking for commercial packaging shall be in accordance with MIL-STD-1188. 6. NOTES 6.1 Intended use. Clamps are intended for use in cargo handling operations to
37、drag heavy, bulky items, large boxes, and loaded pallet boards into place in a ships hold by block and tackle. 6.2 Ordering data. Acquisition documents should specify the following: a. Title, number, and date of this specification. b. c. Size of clamp required (see 1.2). When a first article is requ
38、ired for inspection and approval and the number of units required (see 3.2). d. Finish, if other than as specified (see 3.5). e. f. Degree of preservation and degree of packing required (see 5.1 and 5.2). When other than finish B strapping is required (see 5.2.1). 6.3 - First article. When a first a
39、rticle inspection is required, the item shall be tested and should be a preproduction model. of one or more units. The contracting officer should include specific instructions in acquisition documents regarding arrangements for examinations, test, and approval of the first article. The first article
40、 should consist Custodians : Army - ME Preparing activity: Army - ME Project 3940-0165 Review activity: DLA - IS User activity: Army - CR 7 Licensed by Information Handling ServicesMIL-C-13LI1B 33 7377706 0281433 5 m TACK WELD BOLT MEAD TO 800YMW 2 FLATS OF nEx. I u- NOTES: I. ALL DIMENSIONS ARE IN INCHES. 2. UNLESS OTHERWISE NOTED ALL TOLERANCES ARE A 1/52. LAMP BODY ! WASHER YIW.fWLC1IVL IIEAO LCUOTU ff 2) OU 3 DIA #OLT& 24OM DIA .OLT. I - - THROAT DETAIL FIGURE I. Rlggers beam clamp. 8 *US. GOVERNMENT PRINTING OFFICE: 1983 - 605-034/4262 Licensed by Information Handling Services
