MD ANDERSON Project No.XX-XXXX / MD ANDERSON PROJECT NAME
A/E Name / Issue Description
A/E Project No. / Month, 00, 0000

SECTION 13 49 00 – radiation protection

PART 1 - GENERAL

1.01RELATED DOCUMENTS

  1. Drawings and general provisions of the Contract, including General Conditions and Division 01 Specification Sections, apply to this Section.
  2. Specifications throughout all Divisions of the Project Manual are directly applicable to this Section, and this Section is directly applicable to them.

1.02REFERENCE STANDARDS

  1. The latest published edition of a reference shall be applicable to this Project unless identified by a specific edition date.
  2. All reference amendments adopted prior to the effective date of this Contract shall be applicable to this Project.
  3. All materials, installation and workmanship shall comply with all applicable requirements and standards.

1.03definitions

  1. Lead Equivalence: The thickness of lead that provides the same attenuation (reduction of radiation passing through) as the material in question under the specified conditions.
  2. Lead equivalence specified for materials used in diagnostic x-ray rooms is as measured at 100 kV, unless otherwise indicated.

1.04QUALITY ASSURANCE

  1. Installer Qualifications: Engage an experienced installer who has completed Work similar in material, design, and extent to that indicated for this Project and with a record of successful in-service performance.
  2. Manufacturer Qualifications: Engage a firm experienced in manufacturing products similar to those indicated for this Project and with a record of successful in-service performance.
  3. Source Limitations: Obtain each type of radiation protection product through one source from a single manufacturer.

[Delete below if work of this Section is not extensive or complex enough to justify a preinstallation conference. If retaining, coordinate paragraph below with Division1 Section "Project Meetings."]

  1. Preinstallation Conference: Conduct conference at the Project Site. Review methods and procedures related to radiation protection including, but not limited to, the following:

[Delete subparagraphs below if not required. If retaining, revise to include Project-specific requirements. Insert additional requirements to suit Project.]

  1. Sequence and schedule of radiation protection Work in relation to other Work.
  2. Supplementary lead shielding at duct, pipe, and conduit penetrations of radiation protection.
  3. Methods of attaching other construction and equipment to lead-lined finishes.
  4. Notification procedures for Work that requires modifying radiation protection.

1.05SUBMITTALS

  1. General:
  2. Submit a complete listing of all manufacturers, products, model numbers, and designs proposed for use in the Work of this Section.
  3. Product Data:
  4. For each item of radiation protection required. Include detailed technical product information and installation instructions.
  5. Shop Drawings:
  6. Show layout of entire radiation-protected area.
  7. Indicate lead thickness or lead equivalence of components.
  8. Show components and installation conditions not fully dimensioned or detailed in Product Data.
  9. Show ducts, pipes, conduit, and other objects that penetrate radiation protection together with details of penetrations.
  10. Show details of neutron shielding doors and frames, including anchorage to and coordination with other Work. Show locations of electrical conduit and boxes for connecting door operators, door operator switches, and door interlock switches.
  11. Record Documents:
  12. Maintain two copies of all shop drawings, product data, and samples, manufacturer's specifications, recommendations, installation instructions, and maintenance data at the Project Site. At Project Closeout, turn over both copies to the Architect who will transmit one copy to the Owner.

1.06DELIVERY, STORAGE and HANDLING

  1. Deliver materials in original packages, containers, or bundles bearing the brand name and identification of the manufacturer or supplier. Protect from deterioration by moisture and temperature. Handle and store to prevent damage to edges, ends, and surfaces.
  2. Lead-Lined Plywood Panels: Comply with requirements in Division 06.
  3. Lead-Lined Gypsum Lath: Comply with requirements in Division 09.
  4. Lead-Lined Gypsum Base: Comply with requirements in Division 09.
  5. Lead-Lined Gypsum Board: Comply with requirements in Division 09.
  6. Lead-Lined Steel Doors and Frames: Comply with requirements in Division 08.
  7. Lead-Lined Wood Doors: Comply with requirements in Division 08.
  8. Lead-Lined Wood Doors: Comply with manufacturer's written instructions and requirements of NWWDAI.S.1-A.
  9. Package doors individually at the factory before shipping, using manufacturer's standard plastic wrapping or cardboard cartons.

1.07SYSTEM PERFORMANCE REQUIREMENTS

  1. Materials, thicknesses, and configurations indicated are based on radiation protection design prepared by Owner's radiation health physicist. Provide radiation protection consistent with materials specified in thicknesses and locations indicated.
  2. Radiation protection design prepared by Owner's radiation health physicist is available to Contractor on request.
  3. Make joints, fasten to substrates, and shield penetrations to maintain indicated lead equivalence at all points and in all directions.
  4. Lead-Lined Assemblies: Unless otherwise indicated, the thickness of lead used in doors, door frames, window frames, penetration shielding, joint strips, film transfer cabinets, and other items located in lead-lined assemblies shall not be less than that indicated for assemblies in which they are installed.
  5. Lead Glass: Unless otherwise indicated, provide lead equivalence not less than that indicated for assembly in which glass is installed.
  6. Lead Glazing Plastic: Unless otherwise indicated, provide lead equivalence not less than that indicated for assembly in which glazing plastic is installed.

PART 2 - PRODUCTS

2.01GENERAL

  1. All materials shall meet or exceed all applicable referenced standards, federal, state and local requirements, and conform to codes and ordinances of authorities having jurisdiction.

2.02MANUFACTURERS

  1. Manufacturers: Subject to compliance with requirements, provide products by one of the following:
  2. Radiation Protection Materials and Equipment, General:
  3. A & L Shielding, Inc.
  4. Ameray Company.
  5. Atomic International.
  6. Bar-Ray Products, Inc.
  7. Building Specialties Co. of Pittsburgh, Inc.
  8. El Dorado Metals, Inc.
  9. Mayfield Manufacturing Co.; Radiation Engineering Div.
  10. NELCO.
  11. Norval Industries, Inc.; Radiation Protection Products Div.
  12. Ray-Bar Engineering Corp.
  13. S & S X-Ray Products Inc.
  14. Shielding Construction Solutions, Inc.
  15. Tecknit Shielding Systems.
  16. Willard Industries, Inc.; Nuclear Products Div.
  17. Lead-Lined Steel Doors and Frames:

[Steel door and frame manufacturers listed below offer lead-lined doors and frames.]

  1. American Steel Products Corp.
  2. Deronde Products.
  3. El Dorado Metals, Inc.
  4. Karpen Steel Custom Doors & Frames.
  5. Kewanee Corp.
  6. Pioneer Industries.
  7. Precision Metals, Inc.
  8. Security Metal Products, Inc.
  9. Shielding Construction Solutions, Inc.
  10. Tex-Steel Corporation.
  1. Lead-Lined Wood Doors:

[Wood door manufacturers listed below offer lead-lined doors.]

  1. Algoma Hardwoods, Inc.
  2. Eggers Industries; Architectural Door Div.
  3. General Veneer Manufacturing Co.
  4. Haley Brothers, Inc.
  5. Ideal Wood Products, Inc.
  6. Oshkosh Architectural Door Co.
  7. VT Industries, Inc.
  8. Weyerhaeuser Co.
  1. Lead Glass:
  2. Deutsche Spezialglas AG; Distributed by Schott Corp., Technical Glass Div.
  3. Lead Glazing Plastic:
  4. Victoreen, Inc.; Nuclear Associates Div.
  5. Modular Shielding Partitions:
  6. Victoreen, Inc.; Nuclear Associates Div.

2.03MATERIALS

[Select required materials below. Add other materials or revise paragraphs retained to suit Project.]

  1. Lead Sheet: FSQQ-L-201, GradeC, or ASTMB749, alloy UNS No.L51120 (chemical lead).
  2. Lead Bricks: Interlocking cast- or extruded-lead bricks made from pig lead, complying with ASTMB29 with 1/2 percent antimony added, with tongues on one edge and end and grooves on one edge and end.

[Paragraphs above and below are often used for shielding linear accelerator therapy rooms, especially on retrofit projects. Retain below if neutron shielding doors are required.]

  1. Borated Polyethylene: Manufactured specifically for neutron shielding and containing not less than 5 percent boron.
  2. Lead Glass: Lead-barium, polished plate glass containing more than 60 percent heavy metal oxide, including 55 percent lead oxide by weight.
  3. Lead Glazing Plastic: Transparent acrylic sheet impregnated with an organolead compound and containing 30 percent lead by weight.
  4. Lead-Lined Concrete Masonry Units: Fabricated from 2 solid concrete units, complying with ASTMC90 or ASTMC129, separated vertically by a single lead sheet permanently bonded or anchored between the 2 halves. Size lead sheets to provide a 1-inch (25-mm) overlap with adjacent units or provide supplemental lead to ensure uninterrupted protection.
  5. Provide special shapes as needed to maintain bond without cutting units.
  6. Masonry Mortar: Comply with Division04 Section "Unit Masonry."

[Retain paragraph above if other masonry is used on Project; otherwise, select paragraph below.]

  1. Masonry Mortar: Comply with ASTMC270, TypeN, Proportion Specification.

[Delete subparagraph below if masonry cement mortar is acceptable.]

  1. Limit cementitious materials to portland cement and hydrated lime.

[Select 1 of 3 paragraphs below if lead-lined panels are required. Select first or second paragraph, and specify face veneer and other characteristics not related to shielding in Division06 Section if unlined panels are also required; otherwise, select third paragraph.]

  1. Lead-Lined Plywood Panels: Panels complying with Division6 with a single lead sheet laminated to the back of the panel.
  2. Accessories for Lead-Lined Plywood Panels:

[Retain subp]aragraph below for narrow joint covers or no joint covers if required.]

  1. Provide 2-inch- (50-mm-) wide lead strips for backing joints.

[Subparagraph below will wrap both sides and back of wood furring to provide continuity of shielding at joints and fasteners.]

  1. Provide 4-inch- (100-mm-) wide lead strips behind wood furring.
  1. Lead-Lined Gypsum Lath: Gypsum lath complying with Division09 Section "Gypsum Plaster" with a single lead sheet, 1 inch (25 mm) longer and wider than lath, laminated to the back of the lath so lead extends 1 inch (25 mm) beyond one side and one end.
  2. Gypsum Lath Thickness: 1/2 inch (12.7 mm).
  3. Sheet Size: 16 by 48 inches (406 by 1220 mm).
  4. Provide 5/8-inch (16-mm) lead disks or lead tabs 5/8 by 1-1/4 inches (16 by 32 mm) for covering screw heads.
  5. Provide accessories and trim complying with Division09.
  6. Lead-Lined Gypsum Base for Gypsum Veneer Plaster: Gypsum board complying with Division09, of width and length required for support spacing and to prevent cracking during handling, with a single lead sheet laminated to the back of the board.

[Select paragraph above for gypsum veneer plaster or paragraph below for gypsum board. Either paragraph and related installation requirements may be moved to appropriate Division9 Section, if desired.]

  1. Lead-Lined Gypsum Board: Gypsum board complying with Division09, of width and length required for support spacing and to prevent cracking during handling, with a single lead sheet laminated to the back of the board.
  2. Gypsum Board Thickness: 5/8 inch (15.9 mm).
  3. Provide 3-inch- (75-mm-) wide lead strips for wrapping metal stud flanges.
  4. Provide 5/16-inch (8-mm) lead disks for covering screw heads.
  5. Provide finishing materials, accessories, and trim complying with Division 09.

[Select subparagraph below for gypsum veneer plaster.]

  1. Provide plaster, other finishing materials, accessories, and trim complying with Division09 Sections.
  1. Accessories and Fasteners: Provide manufacturer's standard fasteners and accessories as required for installation, maintaining same lead equivalence as rest of system.

2.04MANUFACTURED UNITS

  1. Lead-Lined Steel Doors: Steel doors complying with NAAMMHMMA861, except that a single continuous lead sheet, of thickness indicated and extending from top to bottom and edge to edge, shall be installed either between back-to-back stiffeners or between stiffeners and stop face of door. Size doors for 1/16-inch (1.5-mm) clearance from frames at heads and jambs and for minimum clearance at bottom.
  2. Line inverted channels at top and bottom of doors with lead sheet of same thickness used in door and close with filler channels to provide flush top and bottom edges.
  3. Shield cutouts for locksets with lead sheet of same thickness used in door. Lap lining of cutouts with door lining 1 inch (25 mm).

[Delete subparagraph below if no view windows or louvers in steel doors.]

  1. Prepare doors to receive view windows and louvers as indicated. Provide removable stops for glazed openings.
  2. Provide lead-lined astragals for pairs of doors.
  1. Lead-Lined Steel Door Frames: Steel door frames complying with NAAMMHMMA861 and lined with lead sheet of thickness not less than that required for doors and walls where frames are used.

[Select paragraph above or below. Below is extra heavy-duty and often used with heavy, lead-lined doors.]

  1. Lead-Lined Steel Door Frames: Steel door frames complying with NAAMMHMMA861, except 0.0667 inch (1.7 mm) thick, and lined with lead sheet of thickness not less than that required for doors and walls where frames are used.

[Retain subparagraphs below with either paragraph above.]

  1. Provide additional reinforcements and internal supports to adequately carry the weight of lead-lined doors. Install reinforcements and supports before installing lead lining.
  2. Form lead sheet to match frame contour, continuous in each jamb and across the head, lapping the stops. Form lead shields around areas prepared to receive hardware. Fabricate lead lining wide enough to maintain an effective lap with lead of adjacent shielding.
  1. Lead-Lined Wood Doors: Flush wood doors complying with Division 08 sections and NWWDAI.S.1-A with lead lining indicated.
  2. Lead Lining: One or more continuous lead sheets extending from top to bottom and edge to edge, constructed either in the core or between the core and faces, at manufacturer's option.

[Select subparagraph above or below. Some manufacturers do not offer construction with fasteners described below; some only provide it for heavier lead thicknesses.]

  1. Lead Lining: One continuous lead sheet extending from top to bottom and edge to edge, constructed in the core. Assemble lead lining and core with poured lead fasteners or steel bolts. Space fasteners not more than 1-1/2 inches (38 mm) from door edge and about 8 inches (200 mm)on center. Countersink bolt heads and cover with poured lead.
  2. Shield cutouts for locksets with lead sheet of same thickness used in door. Lap lining of cutouts with door lining.

[Delete subparagraph below if no view windows or louvers in wood doors.]

  1. Prepare doors to receive view windows and louvers as indicated. Provide removable wood stops for glazed openings.
  2. Provide lead-lined astragals for pairs of doors.

[Paragraph below describes a typical door for a linear accelerator therapy room. Revise shielding requirements as required by radiation health physicist's design.]

  1. Neutron Shielding Doors and Frames: Steel plate doors lined with lead sheet and borated polyethylene and hung from structural-steel door frames.
  2. Shielding Requirements: 3/4-inch- (19-mm-) thick lead sheet on therapy room side, 4 inches (100 mm) of borated polyethylene on other side in door, and 1/4-inch- (6.35-mm-) thick lead sheet in sill.
  3. Steel Plates, Shapes, and Bars: ASTMA36 (ASTMA36M).
  4. Door Construction: Fabricate from 1/4-inch- (6-mm-) thick steel plate faces, reinforced at hinge locations, and 1/2-inch- (13-mm-) thick, steel flat-bar edges fully welded together. Continuously weld exposed joints and finish smooth, matching adjacent surfaces.
  5. Use wood filler to provide smooth, even surfaces on interior of door faces for applying lead sheet and polyethylene. Bond lead sheet to interior of door face with permanent adhesive.
  6. Install lead sheet in one piece and polyethylene in single or multiple sheets, all full height and width of door interior.
  7. Door Frame Construction: Fabricate from 1/4-inch- (6-mm-) thick steel plate to dimensions indicated, fully welded together. Continuously weld exposed joints and finish smooth, matching adjacent surfaces.

[Delete subparagraph below if door frames are detailed on Drawings.]

  1. Fabricate frames with depth equal to thickness of shielding wall in which door is installed. Rabbet frame to receive door and to provide a 4-inch (100-mm) overlap between door edges and remaining frame depth. Make frame faces 4 inches (100 mm) wide with 3/4-inch- (19-mm-) deep backbends.

[Retain subparagraph below if subparagraph above is deleted.]

  1. Reinforce frames and drill and tap as needed to accept finish hardware.
  2. Provide steel strap anchors using 1/8-by-2-inch (3-by-50-mm) straps of length required for a minimum 8-inch (200-mm) embedment. Weld anchors to frame members not more than 8 inches (200 mm) from both bottom and top of jambs and from ends of head and space anchors not more than 24 inches (600 mm) apart.
  3. Provide channel-shaped sill fabricated from 1/4-inch- (6-mm-) thick steel plate lined with lead sheet. Make sill same width as jambs by 1-1/2 inches (38 mm) deep and weld to door jambs.
  1. Shop-Primed Finish: Prepare ferrous-metal surfaces to comply with SSPC-SP3 (Power Tool Cleaning) and apply a fast-curing, lead- and chromate-free, universal modified-alkyd primer complying with performance requirements of FSTT-P-664.

[Subparagraph below increases coverage at hard-to-reach and vulnerable areas.]

  1. Stripe paint corners, crevices, bolts, welds, and sharp edges.
  1. Hardware: Provide the following hardware for each door:
  2. Hinges: BHMAA156.1, TypeA8391; weld- or bolt-on type at manufacturer's option; sized for door weight; 2 or 3 per door at manufacturer's option.
  3. Pulls: BHMAA156.6, TypeJ401, 2 per door.
  4. Operator: Power-opening and spring- or power-closing unit; with automatic hold-open; complying with BHMAA156.10; sized for door weight and width; and adjustable for opening, closing, and checking speeds. Unit shall have an emergency release to allow door to be opened manually and a disconnect switch to prevent power operation when door is in emergency-release mode.
  5. Controls: Provide 2 wall-mounted, recessed, push-plate switches for opening door and 1 push-button switch for closing door. Provide motion or presence sensors to detect persons or objects in path of door and to stop and reverse action of door operator in such a case.
  6. Door Interlock Switch: Provide electric switch in frame jamb to prevent operation of radiation therapy equipment when door is open and to shut off power to equipment if door is opened while equipment is in use.
  7. Provide rough box for installing switch, fabricated from 1/4-inch- (6-mm-) thick steel plate welded to frame and lined on all sides with 1/4-inch- (6-mm-) thick lead sheet.
  1. View-Window Frames: Fabricate from 0.0428-inch- (1.1-mm-) thick, formed-steel sheet or 0.064-inch- (1.6-mm-) thick aluminum extrusions with mitered corners, welded or bolted with concealed fasteners.
  2. Line with lead sheet formed to match frame contour, continuous in each jamb and across head and sill, lapping the stops, and fabricated wide enough to maintain an effective lap with lead of adjoining assemblies.
  3. Construct so lead lining overlaps glazing material perimeter by at least 3/8 inch (9 mm) and provide removable stops.
  4. Form sill with an opening for sound transmission. Offset sound passage to make opening lightproof and to maintain required lead equivalence at all points and in all directions.

[Lead louvers are for doors, not HVAC grilles.]