DLA A-A-52301-1992 DRAWING BOARD AND DRAWING BOARD TRESTLES《制图和制图支架》.pdf

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1、LI A-A-52301 bb 9999974 0064965 4 - A-A-52301 April 3, 1992 COMMERCIAL ITEM DESCFUPIION DRAWING BOARD AND DRAWING BOARD TRESTLES The General Services Administration has authorized the use of this comercial item description in preference to Federal specification GGD-635D and military standards MS3911

2、5C, MS39116C, MS39117C, W39118D, M39123C, and MS39124. This description covers drawing boardc and drawing board trestles of various sizes, to be used for drafting, layout or military projection applications. Salient characteristics. Desim: The drawing boardc with or without applicable trestles shall

3、 be as follows and as described herein: Type I, type II, and type III desk boardc shall conform to figure 1. Typ II, type III, and type IV trestle boards shall conform to figure 2. Trestles shall be in accordance with figure 3, figure 4, figure 5, or figure 6 and as described herein. Classification.

4、 Type i - Wood drawing boards with wood end cleats. Size: a - 12 by 17 inches (figure 1-1) b - 16 by 21 inches (figure 1-2) c - 20 by 26 inches (figure 1-3) d - 23 by 31 inches (figure 1-4) e - 31by 42 inches (figure 1-5) Beneficial comts, recommendations, additions, deletions, clarifications, etc.

5、and other data which may improve this document should be sent by letter to: Commander, U.S. Army Belvoir Research, Developmt and Ehgineerh-q Center, ATIN: STRE3E-TSE, Fort Belvoir, VA 22060-5606. AMSC N/A FSC 6675 DISTRIEXITION STATEMENT A. Approved for public release; distribution is unlimited. Pro

6、vided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52301 bb 9999974 00b49bb b .a A-A-52 301 Type II - Wood drawing boards with ntetal end cleats. Size: a - 12 by 17 inches (figure 1-1) b - 16 by 21 inches (figure 1-2) c - 20 by 26 inches (figure 1-3) d

7、 - 23 by 31 inches (figure 1-4) e - 31 by 42 inches (figure 1-5) f - 23 by 31 inches (figure 2-1) g - 31 by 42 inches (figure 2-2) h - 38 by 48 hches (figure 2-3) i - 43.5 by 60 inches (figure 2-4) j - 43.5 by 72 inches (figure 2-5) k - 43.5 by 84 inches (figure 2-6) Type III - Composition core draw

8、ing boardc, with wood or metal bandingon all edges. Size: a - 12 by 17 inches (figure 1-1) b - 16 by 21 inches (figure 1-2) c - 20 by 26 inches (figure 1-3) d - 23 by 31 inches (figure 1-4) e - 31 by 42 inches (figure 1-5) f - 23 by 31 inches (figure 2-1) g - 31 by 42 Inches (figure 2-2) h - 38 by 4

9、8 inches (figure 2-3) i - 43.5 by 60 inches (figure 2-4) j - 43.5 by 72 inches (figure 2-5) k - 43.5 by 84 inches (figure 2-6) bottom, with three battens an metal end cleats. Type IV - Particleboard core laminated with clear wood veneer top and Size: a - 60 by 120 inches (figure 2-7) Type (optionai)

10、 - Composition core drawing boardc, with plastic laminated surfaces and netal en cleats. Size: b - 60 by 108 inches (figure 2-7 (optional) (Note: Sizes my vary up to ANY DEVIATION SHALL BE EVENLY DISTRIBUTED OVER THE ENTIRE INCREMENT.ALL EDGES SHALL BE STRAIGHT WITHIN 1/64 INCH END TO END. FIGURE I.

11、 Drawing boards - desk type I -II -III. 7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-. A-A-52301 66 W 9999974 0064972 1 W A-A-5 2 30 1 TYPE II TYPE III 1-d EDGE - BANDING TOP AND BOTTOM METAL END CLEAT SHAPE AND METHOD OF ATTACHMENT TO ENDS OF B

12、OARD -LEDGE BANDING TOP AND BOTTOM END EDGE BANDING WITH METAL CLEATS. LAYER LAYER TYPE Y (DASH 7 ONLY) OPTIONAL PLASTIC LAMINATED SURFACES L- PARTICLEBOARD TYPE II-III-IT NOTES : I. ALL DIMENSIONS IN INCHES. TOLERANCES NOT SPECIFIED SHALL BE: PLUS 1/32 INCH FOR OASH 1 THRU 6, PLUS 1/8 INCH FOR DASH

13、 7. WORK SURFACES SHALL BE A TRUE PLACE WITHIN 1/64 INCH (DASH 1 THRU 6). 1/8 INCH (DASH 7), FOR 12- INCHES OF LENGTH OR WIDTH, AND SHALL NOT BE CUMULATIVE WITHIN ANY 12- INCH INCREMENT. ANY DEVIATION SHALL BE EVENLY DISTRIBUTED OVER THE ENTIRE INCREMENT. ALL EDGES SHALL BE STRAIGHT WITHIN 1/64 INCH

14、 (OASH 1 THRU 6 AND 1/8 INCH (DASH 7) END TO END. A PERMANENT COVER SHALL BE FURNISHED FOR DASH 7, THE COVER SHALL BE REVERSIBLE, FLEXIBLE, AND WITH A CUSHIONING SURFACE ON BOTH SIDES. THE COVER SHALL BE FASTENED WITH DOUBLE-FACED TAPE. I DASH NO.1 A 2 1/4 I B t 1/4 I C 2 1/8 I t -I 23 I 31 I 7/8 -2

15、 31 1 7/A 2. TYPE IV (DASH 7, OPTIONAL). NO BATTENS ARE REQUIRED. THE PLASTIC LAMINATE SHALL COVER ALL WORKING SURFACES AND EOGE BANDINGS. THE PLASTIC LAMINATE SHALL BE THERMAL FUSE0 TO THE PARTICLEBOARD. A PERMANENT COVER IS REQU I RED. FIGURE 2. Drawing boards with trestles type II-III-E. 8 Provid

16、ed by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-52301 66 M 9999974 - 0064973 3 A-A-. 5 2 30 1 4y CHAIN LENGTH II 2-1/2 NOTES: I. ALL DIMENSIONS IN INCHES. 2. ALL DIMENSIONS ARE REFERENCE DIMENSIONS. 3. ALL NUTS ARE WING NUTS. 4. THE BOLTS, WING NUTS, W

17、ASHERS, SCREWS, AND CHAIN SHALL BE COMMERCIAL GRADE CORROSION RESISTING STEEL, OR SHALL BE TREATED FOR CORROSION RESISTANCE. THE BOLTS SHALL HAVE A WASHER UNDER EACH HEAD AND EACH WING NUT. SECURE CHAIN WITH SCREW EYES. FIGURE 3. Trestle, drawing board (23 x 31 inch drawing board), I 9 Provided by I

18、HSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-.- - A-A-52301 bb 9999974 O064974 5 A-A- 5 2 30 1 CHAIN LENGTH 20 NOTES: I. ALL DIMENSIONS IN INCHES. 2. ALL DIMENSIONS ARE REFERENCE DIMENSIONS. 3. 4. ALL NUTS ARE WING NUTS. THE BOLTS, WING NUTS, WASHERS, SCREWS,

19、AND CHAIN SHALL BE COMMERCIAL GRADE CORROSION RESISTING STEEL, OR SHALL BE TREATED FOR CORROSION RESISTANCE. THE BOLTS SHALL HAVE A WASHER UNDER EACH HEAD AND EACH WING NUT. SECURE CHAIN WITH SCREW EYES. FIGURE 4. Trestle, drawing board (31 x 42 inch drawing board). 10 Provided by IHSNot for ResaleN

20、o reproduction or networking permitted without license from IHS-,-,-A-A-52301 -CHAIN LENGTH 20 d NOTES: 28-7/8 I. ALL DIMENSIONS IN INCHES. 2. 3. ALL DIMENSIONS ARE REFERENCE DIMENSIONS. ALL NUTS ARE WING NUTS. 4. THE BOLTS, WING NUTS, WASHERS, SCREWS, AND CHAIN SHALL BE COMMERCIAL GRADE CORROSION R

21、ESISTING STEEL, OR SHALL BE TREATED FOR CORROSION RESISTANCE. THE BOLTS SHALL HAVE A WASHER UNDER EACH HEAD AND EACH WING NUT. SECURE CHAIN WITH SCREW EYES. FIGURE 5. Trestle, drawing board (38 x48 inch drawing board). -13/16 11 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-L T A-A-5230L bb D 999997L1 006497b 9 D A-A -52301 - OD U n) I- - WJ W O z l-L&h+ W (r 12 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-