1、_ - Li -. y- MIL-R-0237 71 7777906 0242637 I M F- , . 1- $1 r ! -. 11 “ - . Ir s O . : . -.- . . -. Ei-R-8G237 (TE) 18 July 1932 MILITARY SP ECF ICATIOK RACKS, STORAGE, HEAVY DUTY 1. SCOPE 1.1 Scope. This specification covers storage racks comprising transverse . upright frames and longitudinal inte
2、rconnecting shelves for supporting stored ma terial. - 1.2 Classification. The racks and components are of the following classes, styles and sizes. The quantities of each class of rack, of each style and height of upright frame, and of each style and length of shelf shall be as specified (see 6.2) :
3、 RACKS - Class Safe Load Rating (poiindsl Upright Frame - Shelf I 20,000 8,000 II 25,000 10,000 III 30,000 12,000 IV 37,500 15,000 UPRIGHT FRAMES Style Overall Depth (feet) Height (feet) A 4 8, 10, or 12 B 5 8, 10, or 12 c 6 8, 10, or 12 Style Length (feet, hor,izontal clearance) B Ji thou t deck B
4、With deck 8 or 10 8 or 10 I FSC 7125.1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-L . MIL-R-0237 71 9997706 0242638 3 HL - R- 8 O 2 3 7 (i? ) 2. APPLICABLE DOCUMENTS 2.1 Government publications. Tne following documenrs of the issue in ef- fect o
5、n date of invitation for bids or request for proposai form a part of this specification to the extent specified herein. SPECIFICATIOHS Federal QQ-S -741 QQ-S-781 Steel Strapping, Flat Steel, Carbon, Structural Sh.ape, Plate and Bar Military MIL-P-116 Preservation, Methods of STANDARDS Military MIL-S
6、TD-129 Marking for Shipment and Storage MIL-STD-130 Identification Marking of U. S. Military Property (Copies of specifications, standards, drawings, and publications re- quired by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as direct
7、ed by the contracting officer .) 3.1 First Article approval. If First Article approval is required (see 6.2 and 6.3), inspection therefor shall be in accordance with Section 4. A First Article comprises a preproduction model or initial production Sam- ple,in the quantities required for testing; appr
8、oval involves testing and evaluating the First Article for conformance with the requirements herein before, or in the initial stage of, production Under a contract. 3.2 Design. The racks shall be all steel, designed in accordance witn the recommendations of the Rack Manufacturers Institute as modifi
9、ed herein. Design maximum stress shall not exceed that based on the design yield point 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- . MIL-R-0237 71 9999906 02LI2639 5 of the steel used, applying a. factor of safety thereto of 1.92 for upright f
10、rames, 2.5 for beam, and 1.65 for front-to-back members. The design yield point shall be the actual yiel9 point or 50,000 psi, whichever is less. beam connection shall be designed for support of a load equal to the safe load required for the entire shelf of which the beam forms a part. Connec- tions
11、 of beams to upright frames shall be by a simple interlocking method without use of screws, bolts or other devic.es requiring tools for assembly and disassembly. QQ-S-741, having an elongation in 2 inches of not less than 20%. Kot rolled steel may be cold formed. Each Steel shall be hot rolled struc
12、turai conforming with 3.3 Construction. The members shall be constructed for easy assembly into completed storage racks without use of tools of any kind. Interlocking joints shall provide rigid connections between vertical and horizontal mem- bers. Safety locks, either separate or integral with each
13、 beam, shall be provided to positively prevent -accidental disconnection of members ; no tools shall be required for installation or removal. The assembled rack shall have no projections front or back which could be hazardous. 3.3.1 Surfaces. All surfaces of ail components and accessories shall be c
14、leaned and free of dirt, oil, grease, scale, flash, flux, and other hamful or extraneous material. Surfaces shall be smooth, and all exposed edges shall be deburred, rounded or beveled. Except as otherwise specified here- fn, the condition and finish of all surfaces shall be in accordance with the m
15、anufacturers standard commercial practice. 3.3.2 Painting. Unless otherwise specified (see 6.2), all surfaces of ali members, except those which are plated to prevent corrosion, shall be painted in accordance with the manufacturers standard commercial practice, without holidays. 3.4 Components. 3.4.
16、1 Upright frames. Each upright frame shall be rated in accordance with 3.2 to support a total load of not less than its required safe load rating. In addition, the front post shall be similarly rated to support not less than 75% of the total safe load rating of the upright frame, while the rear post
17、 shall be rated to support not less than 50% of the total safe load rating of the upright frame. These ratings shall be with the lowest shelf not less than 60 inches above the floor. Each upright frame shall comprise two posts which are identical except they may be opposite hand, and except the iron
18、t member may be of greater thickness. than the rear one. Each frame shall be identical to and interchangeable with other frames, The posts shall be cross braced to each other with welded horizontal braces and X-braces or Z-braces, to provide a rigid structure. Where X-braces cross each other, 3 Prov
19、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. MIL-R-80237 71 H 7777906 02i.12640 1 - I -Re802 3 7 and where X-braces or Z-braces cross horizontai braces, they shall be wedcd. The braces shall not protrude beyond tne sides of the upright frame posts,
20、obstruct the attachment of beams to the upright frame, or incesfere with loading the shelves. each upright frame, the bottom one being not more, than 6 inches above the floor, the second not more than 36 inches above the bottom one, the third not more than 36 inches above the second, and the top one
21、 not more than 6 inches from the top of the posts. There shall be not less than one X-brace or Z-brace in each 8-foot high upright frame, and not less than two in each 10-foot and 12-foot high upright frames. bearing plate of not less than 7 gauge (0.1793“) material of rectangular shape except the i
22、nner corners may be cropped, projecting beyond the verti- cal surfaces of the post toward the other post only, except it may extend not more than 1/4 inch beyond the other surfaces of the post. plate shall have a 9/16“ hole for anchoring to the floor. frame shall have provisions for attaching beams
23、on both sides of both posts, at uniformly spaced vertical intervals of not more than 4 inches starting not more than 8 inches above the floor. It shall be possible to relocate a beam in any position without disturbing any beam above, below, or in the next bay. There shall be not less than four horiz
24、ontal braces in Each post shall have a welded The bearing Each upright 3.4.2 Shelves. Each shelf shall comprise a pair of beams and accessory ma- terial. Style A and Style B shelves shall be identical in all respects ex- cept for the accessory material required to be furnished with them. shelf shall
25、 be rated in accordance with 3.2 for not less than the required safe load rating uniformly distributed over its length. The means for at- tachment of beams to upright frames shall provide longitudinal stability of the assembled rack. Length of beams shall be such as to provide for clear space betwee
26、n upright frames (horizontal clearance) of 8-O“ or 10-0“ as required. less than 3/4“ wide, to provide support for nominal 2“ thick planking be- tween beams, the tops of the beam and planking being flush. bottom of such means shall furnish support to plank ends except for open- ings required for purp
27、oses specified herein. its outer face with: %AX. CAPACITY: 8,OOW POUNDS PER SHELF; 20,OOW POUNDS TOTAL BEIWEEN UPRIGHTS“ in block letters not less than one inch high. Mark- ing shall be by stenciling, application of pressure-sensitive tape, or other equally permanent means, and shall be located to n
28、ot be obscured by the mesh of Style B shelves. Each The inside of each beam shall have means, 1-5/8“ high and not The entire Each beam shall be marked on * As applicable to the class of racks involved; Class I shown. 3.4.2.1 Style A. member which shall positively prevent spreading of beams under the
29、ir rnaxi- mum rated load. Each Style A shelf shail have at least one front-to-back 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-$EL-R-80237 (IP) 3.4.2.2 Style B. pair of beams, of suitable dimensions for beams mounted between the style upright f
30、rames required. The mesh shall be $3 (0.2437“) wire, welded on nominal 2 inch by 2 inch spacing except the last space front and back shall be not more than 4“. The mesh shall fit over the tops of both beams, and shall extend downward on the outsides of the beams not less than 1 inch. The longitudina
31、l wires of the mesh shall be under the transverse wires ex- cept for the final longitudinal wire on front and back edges which shall be on top. Tine transverse wires shall be flush with the final longitudinal wire, or undercut, to produce a snag-free edge when mounted on the beams. The longitudinal
32、wires shall similarly be flush with the end traverse wires, or undercut. The wire mesh decking for a pair of beams may be in one or two pieces. If in one piece, the length shall be at least the required horizon- tal clearance less two inches; if in two pieces, the length of each piece shall be at le
33、ast half the required horizontal clearance less two inches. The overall length of each orie-piece, or the overall length of two two-piece as installed on the beams, shall not exceed the required horizontal clear- ance less 1/2 inch. Necessary front-to-back members shall be furnished to provide load
34、carrying capability of the mesh of not less than 300 pounds per square foot, or the rated load of the shelf divided by the square feet of mesh decking, whichever is greater. foot to the entire area of mesh shall not be considered as requiring that the load rating of the shelf be increased above that
35、 specified to be fur- nished. Front-to-back members shall be in sufficient quantity to provide 4 at least one more per shelf than the required horizontal clearance in feet. For design of front-to-back members, no strength in bending shall be as- signed to the wire mesh. The front-to-back members sha
36、ll positively pre- vent spreading of beams under their maximum rated load. Each Style i3 shelf shall have wire mesh decking for its Application of 300 pounds per square 3.4.3 Tolerances. The following tolerances shall apply: a. Height of upright frame legs shall be as required - + 1/4 inch; overall
37、depth as required - + 1/8 inch. b. Heights above the floor of matching beam attachment points on all upright frames shall be the same within - + 1/8 inch. c. Lengths of beams when the rack is assembled, shall provide the required horizontal clearance - + 1/8 inch. d. Each post of each upright frame
38、shall be square with the fine connecting the bottoms of its floor plates within 1/4 inch in the total height of the frame. e. Each nally front and 114 inch in the upright frame of assembled racks shall be square longitudi- rear with the line connecting bottoms of floor plates within total height of
39、upright frames. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- I ,. MIL-R-80237 71 m 7779706 02LI2642 5 m - XZL-tc-83237 (Il) 3.5 Optionai accessories When specified (see 6.2), levelirig shim ror up- right frame ?Osts, back-to-back ties, floor an
40、chors for use in coficrete floor, wail connectors for upright frame, and other accessories requirsd shall be furnished, -to the dimensional requirements and in the quantities specified. When leveling shims are furnished, the total quantity required to be furnished shall be in approximately equal qua
41、ntities of 10 gauge (0.1345“), 12 gauge, and 16 gauge (0.0598“) steel; each shall match the bearing plate in outside dimensions arid location and size of hole. 3.6 Identification marking. Unless otherwise specified (see 6.2), each up- right frame and each beam shall be legibly marked with the contra
42、ct number - and the manufacturers name or trademark. application of pressure sensitive tape, or other equally permanent means. When specified (see 6.2), components shall be marked in accordance with MIL- Marking shall be by stenciling, . STD-130. 3.7 Additional requirements, Requirements in addition
43、 to, or in lieu of the requirements specified herein, shall be as specified by the procuring activi- ty (see 6.2). 3.8 Technical data. Data shall be furnished as specified (see 6.2). 3.9 Workmanshie. The workmanship of all components shall be in accordance with the requirements herein and of a quali
44、ty at least equal to that of the manufacturers commercial products of the type specified herein. 4. QUALITY ASSURAh7CE PROVISIOP?S 4.1 Responsibility for inspection. Unless otherwise specified in the con- tract or purchase order, the supplier is responsible for the performance of all inspection requ
45、irements as specified herein. Except as otherwise speci- fied in the contract or order, the supplier may utilize his own or any other facilities suitable for the performance of the inspection requirements speci- fied herein, unless disapproved by the government. The government reserves the right to
46、perfom any of the inspections set forth in the specification when such action is deemed necessary to assure supplies and services conform to prescribed requirements. 4.2 First Article inspection. When First Article approval is required under 3.1, First Article inspection shall be performed. Unless o
47、therwise specified (see .2), First Article inspection shall comprise the examination in 4.4 and the testsin 4.5. Feilure of the item to pass any examination or test shall be cause for disapproval of the First Article. 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without lic
48、ense from IHS-,-,-._ . 4.3 Qualiry cocformance inspection. Each item shall De subjzcted to quali- ty conformance inspection prior to being offered for acceptance. Unless otherwise Specified (see 6.2), quality conformance inspection shall consist of the examination in 4.4 and the inspection in 4.6, F
49、ailure of the item to pass the examination or the inspection shall be cause for rejection. 4.4 Examination. Each component shall be examined to determine compliance with the requirements in 3.2 through 3.9. 4.5 Tests. For each class of rack required to be supplied under the con- tract, three upright frames and six shelves shall be assembled in accbrdance with the instructions to be furnished under the contract, to form a rack two
