VA 13 49 00-2011 RADIATION PROTECTION.pdf

1、07-11 13 49 00 - 1 SECTION 13 49 00 RADIATION PROTECTION SPEC WRITER NOTE: Delete between / - / if not applicable to project. Also delete any other item or paragraph not applicable in the section and renumber the paragraphs. PART 1 - GENERAL 1.1 DESCRIPTION A. This section specifies lead radiation s

2、hielding. B. Construction of products and assemblies used for radiation shielding complying with applicable requirements of NCRP Reports 147 and 102. C. This section includes the following items: 1. Lead Lined Wood Doors 2. Lead Lined Shields 3. Lead Glass 4. Lead Lined Frames 5. Thresholds 6. Casse

3、tte Transfer Cabinets 7. Lead Louvers 8. Lead Lined Concrete Masonry Units 9. Lead Sheet 10. Lead Lined Plywood 11. Lead Lined Gypsum Lath 12. Lead Lined Gypsum Wallboard 1.2 RELATED WORK A. Masonry mortar: Section 04 20 00, UNIT MASONRY. B. Structural steel: Section 05 50 00, METAL FABRICATIONS. C.

4、 Wood Veneer finish for doors: Section 08 14 00, WOOD DOORS, and Section 09 06 00, SCHEDULE FOR FINISHES. D. Steel door frames: Section 08 11 13, HOLLOW METAL DOORS AND FRAMES. E. Hardware for doors: Section 08 71 00, DOOR HARDWARE. F. Installation of Doors and Hardware: Section 08 11 13, HOLLOW MET

5、AL DOORS AND FRAMES / Section 08 14 00, WOOD DOORS / Section 08 71 00, DOOR HARDWARE / /. 1.3 MANUFACTURERS QUALIFICATIONS A. Approval by Contracting Officer is required of product or service of proposed manufacturer and suppliers, and will be based upon submission by Contractor of certification tha

6、t: 1. Manufacturer regularly and presently manufactures lead radiation shielding as specified as one of its principal products. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-11 13 49 00 - 2 2. Manufacturers product submitted has been in satisfac

7、tory and efficient operation or three installations similar and equivalent to this project for three years. 3. Manufacturer submits list of installations. 1.4 TESTS A. Lead radiation shielding will be tested at the expense of the Government after X-ray equipment is installed. B. Any additional testi

8、ng required due to correction and replacement of defective work will be done by the Government at Contractors expense. NOTE: Lead glass, lead lined concrete masonry units, lead lined gypsum lath, lead lined gypsum wallboard and lead lined plywood will not be tested prior to installation. 1.5 SUBMITT

9、ALS A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES. B. Shop Drawings: Each lead radiation shielding item specified showing thickness of lead, details of construction and installation. C. Samples: 1. Lead lined concrete masonry units, gypsum lath and gypsum wa

10、llboard. 2. Bottom corner section of lead lined door, 300 mm (12 inches) square showing bottom and side edge strips. D. Manufacturers Literature and Data: Each lead radiation shielding item specified. 1.6 WARRANTY A. Warranty lead lined doors against defects in workmanship and materials subject to t

11、erms of “Warranty of Construction“ Article in GENERAL CONDITIONS, except that warranty period shall be two years. B. Warp or twist of lead lined flush veneered doors may not exceed 6 mm (1/4 inch) in any face dimension of door (including full diagonal), measured not less than six months after doors

12、have been hung and finished. 1.7 APPLICABLE PUBLICATIONS A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only. B. Federal Specifications (Fed. Spec.): QQ-L-201F(2)Lead Sheet C. American

13、Society for Testing and Materials (ASTM): A167-99(2009) Stainless and Heat Resisting Chromium-Nickel Steel Plate, Sheet and Strip Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-11 13 49 00 - 3 C1396/C1396M-04 Gypsum Wallboard/Gypsum Lath C90-11 .

14、 Load-Bearing Concrete Masonry Units C1002-07 . Steel Drill Screws for the Application of Gypsum Board or Metal Plaster Bases D1187-97(R2002) Asphalt-Base Emulsions for Use as Protective Coatings for Metal D. United States Department of Commerce Product Standard (PS): FED PSI 83-84 Construction and

15、Industrial Plywood E. Military Specifications (Mil. Spec.): MIL-C-36373 Cabinet, Cassette Transfer, Wall Mounted F. National Council on Radiation Protection and Measurements (NCRP): Report 147 . Structural Shielding Design for Medical X-Ray Imaging Facilities (2004) Report 102 . Medical X-Ray, Elect

16、ron Beam and Gamma-Ray Protection for Energies up to 50 MeV (Equipment Design, Performance and Use), (1989) PART 2 - PRODUCTS SPEC WRITER NOTE: Make material requirements agree with application requirements specified in the referenced Applicable Publications. Update and specify only that which appli

17、es to the project. 2.1 MATERIALS A. Lead Sheet: Fed. Spec. QQ-L-201, Grade C, of thickness shown on drawings. B. Lead Lined Concrete Masonry Units: 1. ASTM C90. 2. Units shall have unpierced sheet lead through vertical centers arranged to provide effective lead insulation through all joints. 3. Secu

18、re sheet lead to masonry units either by latex bonding (vulcanizing) method, or by galvanized iron anchors soldered or cemented to lead. C. Lead Lined Gypsum Lath: 1. ASTM C1396, 9 mm (3/8 inch) thick. 2. Bond sheet lead to one side of lath using plastic adhesive which will not dry out, nor set up h

19、ard, nor allow sheet lead to pull loose. 3. Apply sheet lead in uniform thickness shown, unpierced and in one piece. 4. Extend lead one inch beyond edge of each piece of lath at top and at one end. D. Lead Lined Gypsum Wallboard: Provided by IHSNot for ResaleNo reproduction or networking permitted w

20、ithout license from IHS-,-,-07-11 13 49 00 - 4 1. ASTM C1396, Type X, 16 mm (5/8 inch) thick. 2. Factory bond sheet lead to one side of wallboard. 3. Apply sheet lead in thicknesses shown, unpierced and in one piece. E. Lead Lined Plywood Panels: 1. Prod. Std. PS1, Grade A-A interior type, 9 mm (3/8

21、 inch) thick. 2. Factory bond sheet lead to one side of plywood. 3. Apply sheet lead in thicknesses shown, unpierced and in one piece. 4. Make each panel in one piece and of width to fully sustain its own weight without requiring intermediate nailing between joints. F. Stainless Steel: ASTM A167. G.

22、 Lead Glass: Clear, X-ray proof, of sufficient thickness to provide X-ray protection equivalent to that provided by partition or door in which glass occurs. H. Lead Control Windows: Cast lead, rigid, single unit type without joints, with or without voice passage as shown and with lead stop beads and

23、 lead glass. I. Cassette Transfer Cabinets, MIL-C-36373: Sheet lead lining of cabinets shall provide X-ray protection equal to that provided by partition in which cabinets occur. J. Thresholds: /1. Lead lined stainless steel as detailed./ /2. Stainless steel thresholds over lead lining as detailed./

24、 K. Fasteners: 1. Cadmium or chromium plated steel screws for securing lead louvers. 2. Standard steel drill screws, ASTM C1002, with lead washers for application of lead lined sheet materials to metal studs and attach washers in accordance with shielding manufacturers instructions. 3. Nails: a. Use

25、 barbed lead head nails for application of lead lined materials to wood furring strips. b. Long enough to penetrate furring strips not less than 25 mm (one inch). c. Cast-lead head sufficiently thick to equal lead shielding of room provided. L. Lead Discs: Same thickness as lead lining, diameter 25

26、mm (1 inch) larger than fastener. 2.2 FABRICATION A. General: Lead lining of frames, doors and other items occurring in partitions shall provide an X-ray absorption equivalent to that of partitions in which they occur. B. Clearance between Doors and Frames and Floors: Provided by IHSNot for ResaleNo

27、 reproduction or networking permitted without license from IHS-,-,-07-11 13 49 00 - 5 1. Jambs and Heads: A maximum 3 mm (1/8 inch) clearance. 2. Bottom of door to finish floor: Maximum 19 mm (3/4 inch) clearance. C. Lead Lined Wood Doors: 1. Flush veneered construction. 2. Construct doors of two se

28、parate solid wood cores with a single sheet of lead lining through center. 3. Doors shall have filler strips, crossbanding, face veneers and hardwood edge strips, all glued together with unextended urea resin glue applied under heavy pressure. 4. Extend sheet lead lining to all door edges, providing

29、 X-ray absorption equal to partition in which door occurs. 5. Fasten wood cores together with either countersunk steel bolts through lead with bolt heads and nuts covered with poured lead, or with poured lead dowels. 6. Bolts or dowels shall be located 38 mm (1-1/2 inches) from door edges, and at no

30、t more than 200 mm (eight inches) on center in each direction over door area. 7. Finish face of dowels and lead covering of bolt heads and nuts flush with wood cores. 8. Edge strips: a. Same species of wood as face veneer. b. Minimum thickness of edge strips shall be 38 mm (1-1/2 inches) at top edge

31、 and 63 mm (2-1/2 inches) at bottom edge. c. Glue strips to cores before face veneer is applied. d. Extend vertical edge strips full height of door and bevel 3 mm (1/8 inch) for each 50 mm (two inches) of door thickness. e. Give top and bottom edges of doors to receive transparent finish two coats o

32、f water resistant sealer before shipment to site. /f. For door to Deep Therapy, provide lead strip on all four edges of door. / 9. Crossbanding of hardwood: a. Not less than 2 mm (1/12 inch) thick and face veneer not less than 1 mm (1/28 inch) thick, after sanding. b. When straight grain stock such

33、as Basswood, Aspen or Poplar is used for crossbanding, its thickness may be 1.6 mm (1/16 inch) in lieu of 2 mm (1/12 inch). SPEC WRITER NOTE: Specify the veneer type and species for transparent finish doors. 10. Face veneer for doors specified in Section 09 06 00, SCHEDULE FOR FINISHES to have trans

34、parent finish, shall be rotary cut premium grade, uniform light, Birch. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-11 13 49 00 - 6 11. Face veneer for painted doors shall be rotary cut, good grade, mill choice close grained hardwood, except l

35、auan is not acceptable. Use only one species of wood for face veneer. a. Use identical face veneer on both sides of door. Apply face veneer with grain vertical. b. Give doors to be painted a shop prime coat of exterior oil paint on all surfaces before shipment to site. /12. Secure glass panels with

36、hardwood stops of same species as face veneer. Glue stops to doors on corridor side and fasten with countersunk ovalhead screws on room side. Finish edge of stop flush with face veneer /. D. Hardware: 1. Hardware for doors is specified in Section 08 71 00, DOOR HARDWARE. 2. Stagger bolts to door pul

37、ls on plates which penetrate lead lining relative to opposite plate and recess on side of door opposite pull. 3. Provide lead plugs or discs over recessed nut ends of such bolts, unless otherwise shown. 4. Nut ends of bolts for /surface applied hinges / door closures / and automatic door operators /

38、 shall be countersunk and covered with lead lined 16 gage stainless steel pans. 5. Provide round head screws with dull chromium plated finish to secure stainless steel pans. /6. Provide mortises for flushbolts, floor hinge arms, and top pivots with sheet lead on each side. Enclose floor boxes of flo

39、or hinges with sheet lead at sides and bottom./ 7. Make recesses for lock and latch cases at mill and line with lead butted tightly to lead in door. 8. Make total thickness of sheet lead used for lining hardware, equivalent to thickness of sheet lead core of door. 9. Protection and installation of d

40、oors and hardware is specified in Section, 08 11 13 / 08 14 00 / 08 71 00, HOLLOW METAL DOORS AND FRAMES / WOOD DOORS / DOOR HARDWARE. E. Lead Lining of Frames: 1. Line or cover steel frames, stops for doors, and corner type control windows with sheet lead. 2. Install sheet lead free of waves, lumps

41、 and wrinkles with as few joints as possible. 3. Make joints in sheet lead to obtain X-ray absorption equivalent to adjacent sheet lead. Finish joints smooth and neat. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-07-11 13 49 00 - 7 4. Structural s

42、teel frames and metal door frames for lead lined doors are specified in Section 05 50 00, METAL FABRICATIONS and Section 08 11 13, HOLLOW METAL DOORS AND FRAMES respectively. SPEC WRITER NOTE: All doors with lead 3 mm (1/8 inch) thick or greater will have stainless steel thresholds over lead, or lea

43、d lined stainless steel thresholds. F. Thresholds: /1. Neatly fit thresholds around cover plates of floor hinges. Lead lining shall enclose box of floor hinge /. 2. Provide stainless steel expansion bolt fasteners as detailed. G. Lead Rayproof Louvers: 1. Fabricate louvers entirely of lead of thickn

44、ess required to provide protection equivalent to that required in adjoining construction, and fastened with exposed screws. 2. Fastenings for louvers in doors must not penetrate lead lining of door. PART 3 - EXECUTION 3.1 LEAD LINED MASONRY UNIT PARTITIONS A. Lay lead lined concrete masonry units in

45、 courses with staggered vertical joints and lay to provide log cabin bond of at least 100 mm (four inches) at corners and angles. 1. Concrete masonry units designed to have lead laps at joints: Erect in a manner to provide minimum 25 mm (one inch), tight lead laps without soldering or burning. 2. Co

46、ncrete masonry units designed to have lead bars in joints: Erect in a manner to permit lead bars (horizontal and vertical), of thickness not less than that in concrete masonry units, to be inserted in each joint. 3. Masonry units containing 6.0 mm (1/4-inch) lead or less in thickness: Constructed to

47、 provide a 38 mm (1-1/2 inch) lead lap between units by overlapping of lead in adjoining masonry units when erected. 4. Masonry units containing more than 6.0 mm (1/4-inch) lead thickness: a. Construct to receive lead bars in all joints when erected. b. Bars shall lap lead in adjoining masonry units

48、 not less than 19 mm (3/4 inch). 5. Provide special shapes to maintain proper bond. Cut units in the field in a manner not to effect the bond, lapping margin, or the shielding qualities of the lead. B. Mortar joints: Provided by IHSNot for ResaleNo reproduction or networking permitted without licens

49、e from IHS-,-,-07-11 13 49 00 - 8 1. 13 mm (1/2 inch) thick and filled solid with mortar as specified under Section 04 20 00, UNIT MASONRY. 2. Mortar between lead laps will not be permitted. C. Extend partitions into frame openings, with lead projecting into rabbets of frames to effectively lap with lead frames or frame lining. Fill voids around frames with mortar. D. Whe