1、. MIL-P-21875 37 m 979990b O282890 4 = I- f MILITAR SPECIFICATIOX? PALLET, MATERIAL HANDLING, WDOD, DRUM HANDLING, 48 INCHES LONG BY 72 TnCHES WIUE, 2-WAY ENTRY his limited coordination Military specification ims hen prep Water-Repellant. Military MIL-W-O - Wood; Determination of Moisture Content. S
2、TANDARDS Military MIL-STD-105 - Sampling Procedures and Tables for Inspection. by Attribures. MIL-s!rD-l2g - Mazking for Shipment and Storage. MIL-STD-731 - Quality of Wood Members for Containers and Palets . (Copies of specifications and standards required by contractor in connection with specific
3、procurement functions should be obtained from the procuring 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. indicated, the issue in effect on date of invitation; for bids or. reques
4、t for proposal shall apply. Unless otherwise SOCIETY OF AUTWOTIW ENGINEERS SAE Handbook (Application for copies should be addressedto: Engineers, 485 Lexington Avenue, New York City, New York 10017.) Society of Automotive NATIONAL BUREAU OF STANDARDS Handbook H-28 - Screw-Thread Standards for Federa
5、l Services (Application for copies should be addressed to the Superintendent of Documents, Government Printing Office, Washington, D. C. 20402. ) 2 i - -I_- . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-21875 33 W 373330b 0282892 8 = ,- MIL
6、-P-21875 ( SA) 9 3. REQUIRFMENTS. 3.1 Standazd product. Pallets covered by this specification shall be completely assembled and ready for use when presented for Government acceptance. 3.2 Preproduction sample. Unless otherwise specified (see 6.21, the supplier shall furnish a pallet within the time
7、frame specified in the contract or purchase order to prove, before production is commenced, that his production methods and choice of design detail will produce pallets that comply with the requirements of this specification. preproduction sample shall be constructed in the same facilities to be use
8、d for the manufacture of the production item. tests shall be those specified in accordance with Section 4. changes or deviations from the preproduction smple during production shall be subject to the approval of the contracting officer or his authorized representative. The Examination and Any , Appr
9、oval of the preproduction sample shall. not relieve the supplier of his obligation to furnish pallets conforming to this specification. 3.3 Materials. quality normally used in good commercial practice. 3.3.1 Wood. - fim any of the species listed in Table I. for any single pallet may be any species u
10、nder the specified grade. Materials shal be as specified herein and of the Wood for the deckboards and stringers shall be selected Deckboards and stringers 3 . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-21875 (SA) MIL-P-21875 37 777770b 02
11、82893 T T -TABL wane, on 1 non-exposed edge only, not exceeding 1/4 of the thickness nor i/6 of the width qf deckboards or stringers; sound knots whose average diameter does not exceed 1/3 the The following defects piece width; season checks not more than 2 times as long as the piece thickness; 1 sp
12、lit not longer than the width of the piece; Chipped or torn grah not more than 1/16 inch in depth, nor exceeding in mea i/6 of the surface of the piece when chipped or torn grdn side is turned down; occasional 1/2 inch holes not extending through the piece; ph worm holes; streaks; and stains. No pie
13、ce shU contdn any other defect or combination of defects which will materially weaken the strength of the piece or hinder its proper fastening. 3.3.1.3 Wood preservative. Where specified (see 6.2), assembled pdets or wood components shall be Fmmersed for not less than 3 minutes in a wood preservativ
14、e solution conforming to composition A or B, Type II of TT-W-572. If the lumber is cut, shaped, bored, or trimmed after the preservative treat- ment, it shall be resubmerged for not less than 3 minutes in the preservative, or if this is not possible, EU the newly exposed surfaces such as ends, holes
15、, joints, and new cuts shall be swabbed with the preservative. (CAUTION: The carrier for the presenrative is a kerosene base solvent. Personnel should be protected in accordancd with TT-W-572. Weated lumber should be allowed to dry out-of-doors or a well ventilated are to permit evaporation of flamm
16、able vapors. ) 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-21875 37 7777706 O282875 3 MIL-P-21875 ( SA) F 3.4 Design and constructinn. as specified herein and as shown in Figae 1. 3.4.1 Tolerances. of the pallet shall be subject to a tole
17、rance of 1/4 inch plus or minus. %ut-of-square“ deviation shall not exceed 1/2 inch (1 inch difference in Dksign and construction of pallets shall be Except as indicated herein, the overall length and width diagonals). restricted to the dimensional limitations of MTL-STD-731. 3.4.2 Details of compon
18、ents. 3.4.2.1 Deckboards. Deckboards shall be surfaced on two sides. All deck- boards shall be 2 inches nominal width, i-5/8 inches minimum. boards shal be 6 inches nominal width, 5-5/8 inches minimum. boards shu be 8 inches nominal width, 3.4.2.2 Stringers. Each pallet sh (b) three spanner wrench s
19、lots spaced EOo apart to provide additional means of tightening or re- tightening the teenuts onto the carriage bolts. shall be at least 3/4 inch long from the underside of the flange to the open - -. -.:. The barrel of the teenut end and shall provide at least 5/16 inch of $breaded length for maxim
20、um holding power of bolt inebtion. shal be NC2B (5/i6“ - 18 International Thread.) friction lock of at least 12 to 25 inch pounds on first insertion of carriage bolt incorporated in the teenut barrel at least 1/4 inch up from the open end. thickness. -. The treaded portion of the teenut barrel There
21、 shal be an impact The teenut shall be zinc plated of not less than .O0015 inches 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-22875 37 W 777770b 0282873 7 m MIL-P-21875 (SA) f- 3.6 Fabrication of pallets. 3.6.1. Bolting. assembled in acco
22、rdance with Figure 1. Pallet shall be all bolted construction and shall be Cuter edges of outside stringers shall be set inboard approximately 3-l/2 inches from outer edges of deckboard ends. Round head cmriage bolt shall be used to join deckboards and stringers. Bolts shall be EB specified in 3.5.
23、outer stringers shall be offset so that the centerlines are 1-1/4 inches in from stringer edges and 1-1/2 inches in from deckboard edges. shdl have carriage bolts directly centered. drilled with 1/2 inch hole concentric with a 3/8 inch diameter hole through the stringers and opposite deckboard. Each
24、 pair of carriage bolt running through Inner stringers Deckboards for teenuts shall be Nut ends of bolt holes shall have counter- bores i-3/8 inch diameter, i/8 inch deep, and 3/4 inch diameter, 1/4 inch deep. means. Bolt holes shall be blown out clean by compressed air, or a similar All bolts shall
25、 be provided with specified torque washers at their lower ends. Ali bolts and nuts shall be tightly drawn with the face of the pallet. 3.6.2 Positioning of components. Assembled pallets shall form a rectangle All bolts shall be driven to countersink the torque washers. (see 3.4.1). AU. intermediate
26、deckboards shall be parallel to the edges within the dimensions specified in Figure 1. Stringers shall not protrude on any side. 3.7 Marking. in accordance with MIL-STD-130. to 1-1/2 inches high, on the outside face of one of the outside stringers. The manufacturers identification shall be neatly st
27、enciled on the same Unless otherwise specified (see 6.2), pallets shall be mmked V.S.“ shall be branded in letters, 1 inch stringer in letters not over 1/2 inch high. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-P-21875 37 777970b 0282878 7 3
28、.8 Workmanship. Except .for pkrmissible defects, assembled pallets shall Se clean and properly assembled, or damage. 4. QVALITY ASSURANCE PROVISIONS. Surfaces shall be smooth and free of slivers 4.1 Responsibility for inspection, Unless otherwise specified in the con- tract or purchase order, the su
29、pplier is responsible for the performance of inspection requirements as specified herein. Except as otherwise specified, the supplier may utilize his own or any other facilities suitable for the performance of the inspection requirements specified herein, unless disapproved by the Government. The Go
30、vernment reserves the right to perform any of the inspections set forth in the specification where such inspections are deemed necessary to assure that supplies.aud services conform to prescribed requirements. 4.2 Preproduction sample. The preproduction sample(s) shall be inspected for all defects l
31、isted in Table II and tested in acconhrce -with 4.5.1. evidence of non-compliance with specified requirements shall be cause for re- jection. 4.3 Sampling. Sampling inspection shall be performed in accordance with . MIL-STD-105. (e.g. deckboards or stringers) or pallets, as applicable. The lot size
32、shall beexpressed in units of like components The sample unit shall be one pallet or the components necessary to assemble one pallet as applicable. The inspection level shall be II and the acceptable quality level (A not legible and not permanent. 4.4.4 Examination of prepasation for delivery. An ex
33、amination shall be made to determine compliance with the requirements specified in Section 5 for packing and marking, as applicable. The sample unit shall be units or packs or pacts, as applicable. The inspection level shall be S-2 and the A,Q,L 4.0 defects per 100 units. Defects are 85 follows: ii6
34、, uproper stacking. ii7. improper strapping. ii8. Improper or poor DEW-. lg. Contents per shipping unt is not correct. 4.5 Test methods. 4.5.1 Moisture content. Moisture content testing for pallet components shall be acccanplished using my method of MIL-w-60. shall be expressed in units of deckboard
35、s and stringers. unit shall be one deckboard or stringer. The lot size The sample Three determinations shall . be made on each deckboard and stringer, two near the ends and one at the center. The average shu represent the moisture content of - -_ 12 /- -. Provided by IHSNot for ResaleNo reproduction
36、 or networking permitted without license from IHS-,-,-. MIL-P-21875 39 9999906 0282902 7 f-P-2187 5( SA) /I the component. Excessive moisture content shU be classed as a major defect (see 3.3.1.1). The inspection level shaU be 5-2 a;nd the AQL for individual requirements shall be 4.0 defects per hun
37、dred units. When wood preservative is specified (see 3.3.1.2), testing for moisture content shU be performed prior to presemtive treatinent . 5. PREPARATION FOR DELIVERY 5.1 Preservation arid packagin& Not applicable. 5.2 Packinq. (see 6.2). The pallet shall be packed level A, B or C as specified Sh
38、ipents shall be made in carload or truckload lots when possible. The loading of puets ShU be in such amer as to facilitate unloading by use of forklift eqnipent. 5.2.1 Lelrel A 5.2.1.1 Pallets shaU be evenly stacked in quantities not to exceed 54 inches in height and shU have two straps. through the
39、 fork entry opening adjacent to the edge stringers of the Each strap shall pass base paillet. load. The straps shall encircle the outside surface of the Strapping shall be $-1/4 inches by .O35 inches in accordance with type I, class B, grade 2 of QQ-s-781. 5.2.2 Lew1 B 5.2.2.1 Assenble pallets shall
40、 be packed in accordance with 5.2.1.1 except that steel strapping shU conform to type I, class A, of -s-781. 5.2.3 Level C 5.2.3.1 Assembled pallets shall be packed Fn accordance with 5.2.1.1 except that steel strapping shall conform to Type I, Class C, of QQ-S -781. . 13 Provided by IHSNot for Resa
41、leNo reproduction or networking permitted without license from IHS-,-,-MIL-P-21875 39 9799906 0282703 7 m fl /I MIL-P-21875 ( SA) 5.3 Markiq. In addition to any specid markiw required by the contract or order (see 6.2), each p-etized load shall be mazked for shipment in accordance with MIL-STD-l29.
42、6. NOTES 6.1 intended use. handling operation of 55-gdiOn drums. 55-galon drums to be placed on their sides. The pallet described herein is intended for the Each puet Will allow four Pallets rnw be used for long term storage in both cavered and uncovered area. 6.2 Ordering data. Procurement document
43、s shall specify the following: (a) Title, nimber, and date of this document. (b) Grade required (see 1.2). (c) When preproduction model is not required (see 3.2). (a) When preservative or other protection is required (see 3.3.1.2). (e) When specia masking is required (see 3.7). (f) Level of packing
44、required (see 5.2). Carriage bolt torque washers may be United-Cam Corporation part . 6.3 Ms-98397. any equal conforming to 3.5.2 me an acceptable substitute. 6.4 Definitions. “Teenuts“, although a proprietaa-y name of United- Carr Corporation, are adlable from other sources. “KWick-S!$uts“, as supp
45、lied by ACE Engineering Capany, or any equivalent fastener Torque washers 88 supplied by Ace Engineering Company or conforming to 3.5.3 is an acceptable substitute. Prepaxing Actidty : Navy - SA Project No. 3999-NO93 14 Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
46、ense from IHS-,-,-MIL-P-2L35 37 7777706 02829OLi O W i NOTE: PALLET TO BE ASSEMBLE WITH OLTS, TEE-NUTS, AND LOCK WASHERS. P -72 A PLAN VIEW END VIEW I ,/ ,$x6-Carrage Bolt I I TYPICAL BOLTED SECTION FIGURE 1 15 -.- - ._ _. -. - _. _. . . . . _ . . . - . , .- - _- -4 ?- Y -. - _. . . Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
