1、fi- I - / 8 ,MIL-S-b2274B 23 9799906 0489745 8 = JNOT MEASUREMENT SENSITIVE MILITARY MIL-C-62294BCAT) - SUPERSEDING MIL-S-62294A(AT) 29 July 1983 SPEC1 FICATION SEMITRAILER, STAKE: TWO LEVEL DECKS, WITH HYDRAULIC LOADING RAMP, 20 TON, MODIFIED COMMERCIAL This specification is approved for use by the
2、 US Army Tank- Automotive Command, Department of the Army, and is available for use by all Departments and Agencies of the Department of Ijefensg. . 1. SCOPE * 1.1 Score. This specification covers a commercial, 20 ton take- semitrailer with upper (gooseneck) and lower main decks and a tandem axle. T
3、he semitrailer is fitted with a kickup (gooseneck) deck,.lower (main) deck, hydraulic rear loading ramp, hydraulic winch: and an auxiliary engine. semitrailer is intended for transporting cargo, fork lift trucks, and fork lift trucks with cargo. commercial item which is warranted by the manufacturer
4、 as specified iri acquisition documents. The Each vehicle produced under this specification is a I Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: US Amy Tank-Automotive Command, AT“: AMSTA-URD,
5、 Warren, MI 48397-5000, by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC N/A 1- Approved for public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitte
6、d without license from IHS-,-,-2. APPLICABLE DOCUMENTS 2.1 . The following * 2.1.1 Srecifinntioas, standards. and handbooks 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
7、 in the issue of the Department of Defense Index of Specifications and Standards (DODISS) and supplement thereto, cited in the solicitation (see 6.2). 4. SPECIPICATIONC MILITARY MI L-P-514 MIL-W-3912 MIL-H-46170 STANDARDS FEDERAL FED-STD-297 MI LI TARY MIL-STD-SOI MIL-STD-1223 MIL-STD-i261 MS 75021
8、- Plates, Identification, Instruction md Marking, Blank. - Wood Parts, Fabricated: for TPmSpCJrt Vehicle Bodies and Similar Applications. - Hydraulic Fluid, Rust Inhibited, Fire- Resistant, Synthetic Hydrocarbon Base. - Rustproofing of Commercial (Nontactical) Vehicles. - Slinging and Tiedown Provis
9、ions for Lifting - Nontactical Wheeled Vehicles Treatment, and Tying Down Military Equipment. Painting, Identification Marking, and Data Plate Standards. Steel. Contact, Intervehicular, 28-Volt, Waterproof. - Arc Welding Procedures for Constructional - Connector, Receptacle, Electrical - 12 (Unless
10、otherwise indicated, copies of federal and military specifications, standards, and handbooks are available from the Naval Publications and Forms Center, Military Specification and Standards, Bldg. 4D, 700 Robbins Avenue Philadelphia, PA 19111-5094.) * 2.1.2 Qjher Goveres. and Dublicatiom . The follo
11、wing other Government documents, drawings, and publications form a part of this document to the extent specified herein. the issuesare those cited in the solicitation. Unless otherwise specified, 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL
12、-S-bZ294B 23 = 999990b 0489947 L f * DEPARTMENT OF DEFENSE (DOD) Department of Defense Index of Specifications and Standards (DODISSI. (Copies of WDISS are available on a yearly subscription basis either from the Government Printing Office for hard copy, or microfiche copies are available from the D
13、irector, Navy Publication and Printing Service Office, 700 Robbins Avenue, Philadelphia, FA 19111-5093.) DEPARTMENT OF TRANSPORTATION (DoT) Federal Motor Carrier Safety Regulations. Federal Motor Vehicle Safety Standards. * Federal Regulations, 49 CFR, and the Federal Register, and should be address
14、ed to the Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402.) (Application for copies of DOT publications should reference the Code of * 2.2 Nnn - Goverment Dublicatjom . The following documents form a part of this document to the extent specified herein. the issue
15、s of the documents which are DoD adopted are those listed in the issue of the WDISS cited in the solicitation. the issues of documents not listed in the DODISS are the issues of the documents cited in the solicitation (see 6.2). Unless otherwise specified, Unless otherwise specified, * THE EUROPEAN
16、TIRE AND RIM TECHNICAL ORGANISATION (ETRTO) Standards Manual Application for copies of ETRTO publications should be addressed to the European Tyre and Rim Technicai Organisation, 32, Avenue Brugmann, 1060 Brussels, Belgium-) SAE, INC. 5318 SAE Standards J516 5517 5534 5551 5560 5588 5682 and Recomme
17、nded Practices - Air Brake Gladhand Service (Control) and Emergency (Supply) Line Couplers - Trucks, Truck-Tractors and Trailers. - Hydraulic Hose Fittings. - Hydraulic Hose. - Lubrication Fittings. - Performance Levels and Methods of Measurement of Electromagnetic Radiation from Vehicles and Device
18、s (30-1000 MHz). - Seven-Conductor Electrical Connector for Truck-Trailer Jumper Cable. - Turn Signal Lamps. - Rear Wheel Splash and Stone Throw Protection. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I IMIL-S-62294B 23 W 9999706 Oi.189998 3 57
19、00 J702 5706 5931 51292 - Fifth Wheel Kingpin - Commercial Trailers and Semitrailers. - Brake and Electrical Connection Locations - Truck-Tractor and Truck-Trailer. - Rating of Winches. - Hydraulic Power Circuit Filtration. - Automobile, Truck, Truck-Tractor, Trailer, and Motor Coach Wiring. (Applic
20、ation for copies of SAE publications should be addressed to SAE, Inc., 400 Commonwealth Drive, Warrendale, PA 15096.) TiiE TIRE AND RIM ASSOCIATION, INC. Year Book. * should be addressed to the Tire and Rim Association, Inc., 175 Montrose West Ave., Copley, OH 44321.) (Application for copies of the
21、Tire and Rim Association publications * from the organizations that prepare or distribute the documents. documents also may be available in or through libraries or other informational services - (Non-Government standards and other publications are normally available These * 2.3 Qrder of mecedence. I
22、n the event of a conflict between the text of this document and the references cited herein, the text of this document shall take precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. I 3- REQUIREMENTS * 3.1 Standard
23、vehicle and anmasorie5 . Except as specified in 3.1.1 through 3.1-1.10, the semitrailer, components, assemblies, and accessories to be delivered under the contract shall be the manufacturers standard or optional items, which meet or exceed the requirements of this specification. All vehicle items sh
24、all be as represented and rated in the vehicle and equipment manufacturers technical data. Technical data shall be limited to specifications and technical material, identical to that furnished to the authorized company representatives for selection of vehicle models and components and shall be avail
25、able in the engineering offices of the procuring activity prior to delivery of the items. 3.1.1 Smcial rewkemen other reasonably hard, uneven terrain Unimproved roads; other reasonably hard, uneven terrain Highways Highways 20,000 pound load, to and from ground position to a level load position, and
26、 of moving the cargo or lift truck to and from the loading ramp to the proper level deck position for transporting, while connected to or separated from the towing vehicle. The fully equipped semitrailer shall evidence no part failure, deformation, permanent set or interference between parts when to
27、wed under each of the conditions specified in Table I. Speed Payload (minimum) None 30 mph Rated payload 10 mph None 55 mph Rated payload 55 mph 1 TABLE I. Performance. . * 3.3.1 nirnina abim 90 degree angle to a coupled truck tractor without cramping and without damaging the se.mitrailer or the tru
28、ck tractor. The semitrailer shall be capable of assuming a 8. * 3.3.2 Brake w.rfnrmarce. The service brakes shall stop the truck tractor-semitrailer combination, with the semitrailer loaded with specified payload, .within the stopping distance requirements of Federal Motor Carrier Safety Regulation
29、393.52. Requirements shall be met with a truck tractor loaded to its full rated gross vehicle weight (GVW) and gross combination weight (GCW) - . 3.3.3 Trzdhg ab- The semitrailer shall conform to the tracking II ability requirements of Federal Motor Carrier Safety Regulation 393.70(a). * 3.4 Payload
30、 and distribution. * 3.4.1 Bated mvload naDanity . The rated payload capacity, evenly distributed over the load space, shall be not less than 40,000 pounds- The semitrailer shall be capable of supporting 20,000 pounds in any 10-foot length of loadspace. The load space is defined as the total length
31、of the platform including both lower deck (main) and kickup (gooseneck) deck, and not less than the forward 6 feet of the hydraulic rear ramp. shall be suitable for the concentrated, pin point, and localized stresses The semitrailer 7 Provided by IHSNot for ResaleNo reproduction or networking permit
32、ted without license from IHS-,-,-I MIL-S-62294B 23 9 9999906 0489952 5 E MIL-S-G2294B(AT) caused by mobile loads being driven onto the vehicle, by tracks, track pads and wheels, and any other non-evenly distributed loads indicated by the full range of intended uses specified in 6.1. 3.4.2 Wrnd ele-
33、. The semitrailer shall be a two-level type having a lower main deck and a full width kickup (gooseneck) deck. semitrailer shall conform to the dimensions specified in table II while resting on the landing legs on level ground, uncoupled from the towing vehicle, without payload. The term “lower deck
34、” (see table II) is defined as the lower main deck and the hydraulic ramp. The TABLE II. Rimensions and clearances. Characteristic Overall length, feet Lower deck length, feet (not less than) Overall width, inches (plus O, minus 1 inch) Ground clearance, inches (not lesa than) Landing gear ground cl
35、earance Turning clearance (from the centerline of kingpin to any portion of semitrailer 6 inches or more below upper fifth wheel plate), inches (not leas than) Swing radius, from centerline of kingpin to most distant point on semitrailer nose, inches (not more than) Distance from centerline of kingp
36、in to front end of semitrailer, inches (not less than) Upper fifth wheel height (from the ground to underside of plate), inches plus 1 inch, minus O Lower deck height, inches (not more than) Drop height, inches (not less than) Dimensions 35 minimum, 40 maximum 29 96 10 See 3.10.1 82 20 50 40 9 * 3.8
37、 3 . Main frame members shall be adequately braced with a sufficient number of crossmembers to present a rigid construction with sufficient strength for the loads imposed. The outside frame members shall run the full length of the loadspace. members shall extend the full width of the semitrailer. Wh
38、en the semitrailer is loaded with rated payload, and with the loads distributed as specified in The rear cross- Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-S-622948 23 = 9999906 0489953 7 3.4.2, the maximum fiber stress in each frame member(
39、s) shall be not greater than 50 percent of the frame material yield strength or, when specified (see 6.2), 33 percent of the frame material yield strength. Under the above cited conditions of loading, the main frame deflection shall be not greater than 2 inches. The strength of the finished welds sh
40、all be such that they will not fail or crack when the semitrailer is subjected to the loads and performance requirements spcified herein. All parts of the framing shall be completely electric-arc welded. * 3.6.1 Frame mlices - Where frame members are spliced, joints shall be reinforced to fulfill th
41、e dynamic loading requirements of 3.3 through 3.4 and the static loading requirements of 3.6. Splices shall be designed to avoid stress concentration. Splice welds shall be continuous. Transition areas in the gooseneck and kickup shall be smooth and rounded to minimize stress concentrations. * 3.6.2
42、 Frame construction . The frame shall be of the fixed gooseneck type- The main frame rails shall be high tensile steel I-beams of not less than 50,000 psi yield strength. be reinforced and welded into a single structure. not more than 2-feet apart, except over wheels. The kickup frame and lower deck
43、 frame shall The crossmembers shall be 3.6.3 Stress nnalvsls * . The contractor shall perform a stress analysis for the semitrailer loaded as specified in 3.4.2. The stress analysis shall include shear and moment diagrams and deflection calculations. The strength of the floor, crossmembers, and outs
44、ide frame members shall not be included in calculations to compute the main frame maximum fiber stress; but the weight of the floor, crossmembers, and outside frame members imposed on the main frame shall be included in the total load imposed on the main frame. Streis calculations shall include comp
45、lete analysis of the gooseneck and kickup area. * 3.7 ES;Latform. The platform shall be of the two deck type. Each deck (lower and kickup) shall be level and completely covered having no cutouts or protrusions. The kickup deck shall be floored the same as the lower deck or may be completely covered
46、with safety tread type steel plate with a minimum thickness of 0.187 inch, exclusive of the raised tread. The lower deck shall be. floored with hardwood of not less than 1-5/16 inch uniform thickness. The lower deck wood shall be apitong, white or red oak, or white ash as specified in MIL-W-3912. sh
47、all be not less than 47 pounds per cubic foot (pcf), with none of the individual pieces weighing less than 42 pcf, with no more than 15 percent of moisture content at time of weighing. Laminated hardwood is not acceptable- Floorboards shall be laid lengthwise with tongue-and-groove or shiplap joints
48、. Flooring shall be secured with corrosion-resistant screws or bolts. Not less than two securing screws or bolts shall be installed at each cross sill and not less than tw on each side of each butt joint. from the top, the floor shall be countersunk and the top of the countersunk Apitong is allowed
49、for flooring provided the average weight When secured 9 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-I MIL-S-62294B 23 9 9999906 0489954 9 9 MIL-S-G2294B(AT) screw or bolt head shall be not less than 0.125 inch and not more than 0.250 inch below the top of the wood surface. the crossmembers and shall be staggered. provided over the wheel wells. ;I: 3.7.1 we pockets. The semitrailer shall have not l
