1、MIL-T-174 79G 22 August 1977 SUPERSEDING MIL-T-174 79F 12 October 1972 MILITARY SPEGIFICATION TRAILER, PLATFORM, iAREHOUSE, WOOD OR METAL PLATFORM, 6000 POUND CAPACITY, PNEUMATIC TIRES, FIFTH WHEEL STEER This specification is approved for use by all Departments and Agences of the Department of Defen
2、se. 1. SCOPE 1.1 Scope. This specification covers the requirements for 6000 pound capacity, fif th-wheel steer type, wood or metal platform wareouse trailers with or without racks and fork pockets, 1.2 Classification. Platform warehouse trailers shall B he of the 0110- ing types and classes as speci
3、fied (see 6.2 and 6.3): Type I - Platform warehouse trailer without racks. Type II - Platfom warehouse trailer with racks. Class A - Wood platform Class B - Metal platform Class A - Wood platform Class B - Metal platform 2. APPLICABLE DOCUMENTS 2.1 Issues of documents. The following documents of the
4、 issue in effect on date of invitation for bids or request for proposal f0rm.a part of this specification to the extent specified herein: FSC 3920 . . Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed
5、 to: USArmy Mobility Equipment Research and Development Command, ATTN: DRDME-DS, Fort Belvoir, VA 22060 by using the self-addressed Standardization Document Improvement Proposal CDD Form 1426) appearing at the end of khs document or by letter. Licensed by Information Handling ServicesMIL-T-37477G 37
6、 7797706 0282353 3 MIL-T-17479G SPECIFICATIONS FEDERAL QQ-S-781 ZZ- 1-5 50 ZZ-T-410 PPP-B-601 PPP-C-650 PPP-P-40 - Strapping, Steel, and Seals. - Inner Tube, Pneumatic Tire, - Tire, Pneumatic, Industrial. - Boxes, Wood, Cleated-Plywood. - Crates, Wood, Open and Covered. - Packaging and Packing of Ha
7、nd Tools. MILITARY MIL-P-116 MIL-W-8005 - Preservation-Packaging, Methods of. - Wheels and Hubs, for Industrial Pneumatic Tires. STANDARDS FEDERAL 4 FED. STD. No. 595 - Colors. MILITARY MIL-STD-105 MIL-STD-129 4 MIL-STD-130. MIL-STD-1363 MS 5 13 35 MS51336 - Sampling Procedures and Tables for - Mark
8、ing for Shipment and Storage. - Identification Marking of US Military - Measurement of Wood Moisture Content. - Pintle Assembly, Towing, 18,000 Lbs. Capacity, Manual Release. - Lunette - Coupler, Drawbar, Ring. Inspection by Attributes. Property. (Copies of specifications and standards required by c
9、ontractors in connec- tion with specific procurement functions should be obtained from the pro- curing 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 indicated, th
10、e issue in effect on date of invitation for bids or request for proposal shall apply. 2 Licensed by Information Handling ServicesMIL-T-17479G INDUSTRIAL FASTENERS INSTITUTE Standard 114 - Standard for Break Mandrel Blind Rivets. (Application for copies should be addressed to Industrial Fasteners Ins
11、titute, 1517 Terminal Tower, Cleveland, OH 44113). NATIONAL BREAU OF STANDARDS Handbook H28 - Screw-Thread Standards for Federal Services. (Application for copies should be addressed to. the Superintendent of Documents, Government Printing Office, Washi.ngton, DC 20402,) UNIFORM CLASSIFICATION COMMI
12、TTEE, AGENT Uniform Freight Classification. (Application for copies should be addressed to the Uniform Classification Tariff Publishing Officer, Room 1106, 222 South Riverside Committee, ATTN: Plaza, Chicago, IL 60606 .) NATIONAL MOTOR FREIGHT TRAFFIC ASSOCIATION, INC., AGENT National Motor Freight
13、Classification. (Application for copies should he addressed to theherican Trucking Associations, Inc., ATTN: Washington, DC 20036.) Traffic Department, 1616-P Street, Ni?, DEPARTMENT OF TRANSPORTATION (DOT) Motor Carrier Safety Regulations. (Application for copies should be addressed to the Departme
14、nt of SOCIETY OF AUTOMOTIVE ENGINEERS (SAE) Transportation, Federal Highway Administration, Washington, D.C 20591.) SAE Handbook. (Applications for copies should be addressed to the Society of Automotive . Engineers, 400 Commonwealth Drive, Warrendale, PA ,15096,) 3 Licensed by Information Handling
15、ServiceslIL-T-17q77G 37 U 777770b 0282355 7 U - MfL-T-17479G 3. REQUIREMENTS 3.1 Descri tion. The warehouse platform trailer (hereinafter called “trailemonsist of a wood or metal platform, pneumatic tires; automatic couplers or lunette and pintle hook; fifth-wheel steer and with or without racks and
16、 fork pockets as specified (see 1.2 and 3.4.8.2). 3.2 First article. 3.2.1 Preptoduction model. The contractor shall furnish three tralers for examination and testing within the time frame specified (see 6.2), to prove prior to starting production that his production methods and choice of design det
17、ail will produce trailers that comply with the requirements of this specification. Examination and tests shall be as specified in Section 4; and, unless otherwise specified herein, all examination and tests shall be conducted by the contractor subject to surveillance and approval by the Government (
18、see 6.3) . conduct any or all of the preproduction examination and tests, as specified (see 6.2). When specified, the Government will 3.3 Material. Material shall be as specified herein. Material not specified shall be selected by the contractor and shall be subject to all provisions of this specifi
19、cation (see.6.7) . 3.3.1 Lumber. Lumber shall be selected hardwood of any of the following species: Lumber shall have a rough texture. Ash, Beech, Birch, Elm, Hackberry, Hickory, hard Maple or Oak. 3.3.1.1 Moistute content. At time of fabrication of the wood platform, boards shall be of well-seasone
20、d lumber as specified in 3.3.1. The mois- ture content of boards shall be not less than 12 percent nor more than 18 percent when tested as specified in 4.3.1. 3.3.1.2 Quality. Lumber shall be free from warp, decay, shakes, splits and wane, except for the following scattered defects: Sound, tight kno
21、ts with a maximum diameter not exceeding one-third the width of the finished board; checks not more than 4 inches long; and holes not more than 1/2-inch diameter. 3.4 Construction. Completely assembled trailers shall conform to the physical characteristics listed in Table I and as specified herein.
22、4 Licensed by Information Handling ServicesMIL-T-17477G 37 m 9777706 0282356 7 m MIL-T-17479G Table I. Physical. characteristics Rated load 6000 pounds Platform length 108 inch min; 112 inch max. Platform width 45 inch min; 48 inch max. Centerline pintle-hook height Drawbar pivot-height above ground
23、 Overall length (drawbar extended) 158 inches max. 12 inches; -k 1/2 12 inches; 2 1/2. - above ground 3.4.1 Frame. The frame and reinforcing members shall be fabricated The from structural steel shapes and shall. be of welded construction. frame shall be rounded at the corners. 3.4.2 Platforms. 3.4.
24、2.1 Platform (Class A). The boards shall be placed perpendicular to the longitudinal axis of the trailer. inches minimum and 6 inches maximum. The board finished thickness shall be not less than l-l/8 inches. platform shall not vary from each other by more than 1/4 hch. between each board and betwee
25、n the end boards and the end of the trailer shall not be less than 1/16 inch and not more than 3/16 inch. The ends of the boards shall fit inside the frame with the top surface of the boards flush or lower than the top of the frame. Where required, boards shall be cut and shaped to ascornodate frame
26、 corners (see 3.4.1). be held to the frame with steel holddown bars by means of bolts, lock- washers and nuts or bolts and self-locking nuts. be flush with the frame and extend the full length of the trailer and shall be rounded at the ends to match the curvature of the frame, one on each side of th
27、e trailer at the ends of the boards. Bolthole center spacing shall be not more than 12 inches apart. The platform, holddown bars, and fasteners shall have the strength to withstand, without damage, the rated payload distributed over its entire surface with trailer operating under mobile conditions s
28、pecif ied herein. The board widths shall be 3 The thickness of the boards on any one The spacing The boards shall The holddown bars shall 3.4.2.2 Platform (Class B). The platform shall be of all metal construc- tion. without damage, the rated payload distributed over its entire surface with trailer
29、operating under mobile condittons specified herein. The platform and fasteners shall have the strength to withstand, 5 Licensed by Information Handling ServicesMIL-T-17479G 3,4.3 Fifth wheel. The fifth wheel shall be of steel construction and shall consist of an upper plate and lower plate. rigidly
30、joined to the underside of the trailer frame. shall be assembled to the upper plate by means of the kingpin and castel- lated nut, kingpin axis a full 360 degrees in either direction. assembly shall be provided with a grease reservoir, grease retainers, and an accessible pressure type grease fitting
31、. vertical axis of the kingpin and front face of the frame shall be between 20-21 inches. The upper plate shall be The lower plate The lower plate shall be made to rotate about the vertical The fifth-wheel The distance between the 3.4,4 .Running gear. The running gear for each trailer shall consist
32、of four wheel assemblies, each assembly made up of the components as specified in 3.4.5.1, 3.4.5.2 and 3,4.5.3. The load on the wheels when the trailer is fully assembled shall be such that with rated load equally distributed on platform the load on the front and rear wheels shall not vary by more t
33、han 400 pounds, Wheel assemblies shall be mounted so that the tire tube air valves are accessible from outside of the trailer. Wheels shall clear any part of the trailer structure by at least 3/4 inch when,the trailer is subjected to a load equal to 200 percent of rated .load, 3.4,4.1 Reflectors. Tr
34、ailers shall be provided with reflectors in accordance with DOT Motor Carrier Safety Regulation 293.15 and 293.26, 3.4.5 Wheel assemblies, 3.4.5,l Wheels and hubs The wheels and hubs shall conform to size 6,OO-9 as specified in MIL-W-8005. type* * axle type, with MIL-W-8005. The overall end-to-end l
35、ength of the cantilever type axle shall be not less than 13 inches, and the nominal diameter of the stub shank shall be not less than 1-1/2 inches. When the through axle type is used, the nominal diameter of the axle, except for spindles, shall be not less than 1-3/4 inches. The hubs shall be cantil
36、ever mounting 3.4.5,2 Axles. The axles shall be cantilever type or through (solid) The axle spindles shall conform to size 6.00-9 in accordance 3.4.5.3 Tiresandtubes. Tires shall be industrial type conforming to size 6 .OO-9 in accordance with ZZ-T-410, tube or tubeless . have a 10-ply rating. Tires
37、 shall Tubes when used shall conform to ZZ-1-550. 3.4.6 Fasteningdevices. All nuts, bolts, pins, and similar parts shall be installed to prevent them from loosening or becoming out of adjustment. All fastening devices subject to removal or adjustment shall not be swaged, peened, staked, or otherwise
38、 permanently deformed. 6 Licensed by Information Handling ServicesMIL-T-37477G 37 W 9779906 O282358 2 m MIL-T-17 4 7 9G 3.4.6.1 Threads. Threads of threaded fasteners shall conform to the applicable requirements of Handbook H28. 3.4.7 T-jpe I. 3.4.7.1 Couplers. The front coupler shall consist o a co
39、unterbalance coupler loop with an inside radius of 4 hches plus or minus 1/2 .inch and a cross sectional diameter of 15/16 inch to 1 inch and an accompanytng coupler loop bumper. figuration with a minimum throat opening of 1-3/4 inches and a minimum throat length o% 5-3/4 inches and an accompanying
40、spring loaded latch and pin. Coupler design shall be such that when the loop and jaw ends of the couplers on separate trailers are engaged, they cannot separate under operating conditions when tested as specified in 4.6.2.5 and 4.6.26 but shall be capable of being disengaged by a foot operated relea
41、se Couplers shall be capable of angular connection in not less than 30 degrees of arc in either direction from the longitudinal axis of the lead trailer when measured in a horizontal plane. capable of withstanding, without failure or permanent deformation, a hori- zontal static force in either direc
42、tion parallel to the longitudinal center- line of the trailer of not less than 1/5 times the gross weight. gross weight shall be the weight of the trailer pius the rated load for the trailer. The rear coupler shall consist of a-coupler jaw con- Each coupler and ts mounting shall be The 3.4.7.1.1 Mou
43、nting, front coupler. The front coupler shall be rigidly joined to the front end of the towing tongue. The towing tongue shall be Integral to and perpendicular with the front axle and shall lay fixed in a horizontal plane. horizontal plane passing through the center of the coupler) above the floor s
44、urface shall be 12 inches plus or minus 1/2 inch. The front end of the towing tongue shall extend at least 6-1/2 inches beyond the front end of the trailer. The assembled height of the front coupler (Le, the 3.4.7.1.2 Mounting, rear coupler. The rear coupler shall be rigidly The assembled joined to
45、a mounting plate. face of the frame and shall be braced by reinforcing members. plate shall be parallel with the rear face of the frame. height of the rear coupler Ci.e., the horizontal plane passing through the center of the coupler) above the floor surface shall be 12 inehes plus or minus 1/2 inch
46、. The mounting plate shall be welded to the rear The mounting 3.4.8 Type II. 3.4.8.1 Racks (:lass A). A removable rack section shall be provided at front and rear of the body; two removable rack sections shall be furnished on each side, Each rack section shall be equipped with interlocking hard- war
47、e; front and rear section(s) shall be provided with positive locking 7 Licensed by Information Handling ServicesMIL-T-37477G 37 W 4777706 0282357 4 E MIL-T-17479G devices to fasten racks to body, steel bound pocket ends having a base cross-sectional dimension of not less than 1-1/2 by 2-1/2 inches.
48、slats shall be the contractors standard; thick, not less than 3 inches wide, and shall be evenly spaced. of slat widths shall be not less than 60 percent of the rack height. The upright posts shall be hardwood with Rack height shall be 24 inch minimum, Rack shall be not less than 3/4 inch The total
49、3.4.8.1.1 .Racks(Class B). Racks shall be the same as Class A except that the upright posts will be of 2-inch by 1-inch metal channel construc- tion. 3.4.8.2 Forklift pockets; Unless otherwise specified (see 6.2), trailers shall have boxed type pockets for forklift operations which, shall be in- stalled on each side of the trailer to facilitate hoisting the trailer for aircraft loading and unloading purposes. shall be approximately 18 inches each side of transverse centerline of the trailer. Pocket openings shall have a cross-sectional dimens
