Ray-Bar Lead Backed Drywall Specification
3Pages

SECTION 09 29 60, LEAD BACKED DRYWALL PART 1 – GENERAL 1.01 SUMMARY A. Lead Sheet: In compliance with Federal Specification QQ-L-201f, Grade C, 99.9% pure, and ASTM B749, Type L51121. Thickness as indicated on Lead Protection Schedule and Comply with lead shielding equivalents as specified by the qualified health radiation physicist report for this particular project. Note: 7’0” is minimum lead height per national standard (NCRP) unless otherwise indicated by radiation physicist. B. Lead Backed Gypsum Board: As manufactured by RAY-BAR ENGINEERING CORPORATION, each board labeled on lead side as type “RB-LBG” and lead thickness value available as follows 1. Sheet Size: Width and length as required for support spacing to prevent cracking during handling. Not to exceed 4’0” X 10’0”, Type X Standard (RB-LBG) also available in Abuse Resistant (AR), Mold Resistant (MR), Water Resistant (WR) and High Impact (HI) gypsum panels, where required. 2. Drywall Thickness: Not less than 5/8” – unless otherwise indicated. 3. Lead Thickness: Comply with lead shielding equivalents as specified by the qualified health radiation physicist report familiar with local standards and regulations for this particular project and clearly label lead thickness value on lead side of each board. 1.02 REFERENCES A. Standards: Comply with requirements of the National Council on Radiation Protection and Measurements (NCRP) Report No. 49“ Structural Shielding Design and Evaluation for Medical Use of X-Rays and Gamma Rays of Energies up to 10 MeV”, and NCRP Report No. 147 “Structural Shielding Design for Medical X-Ray Imaging Facilities”. B. Comply with lead shielding equivalents as specified by the qualified health radiation physicist report for this particular project. C. Must Comply with requirements of local regulatory agencies where standards and criteria exceed NCRP Reports 49 and 147. Lead Backed Drywall must meet or exceed the following specifications or standards: QQ-L-201f, Grade C, 99.9% Pure – Federal Specification, Lead ASTM B749 Type L51121, American Society for Testing and Materials- Lead Sheet ASTM C 36, American Society for Testing and Materials – Gypsum Wall Board, Type “X” 1.03 RELATED DOCUMENTS A. Related Specification Sections: 13 49 00 X-Ray Protection. 1.04 SUBMITTALS A. Shop Drawings: Provide for all doors and other related materials specified for this Section. 1.05 DELIVERY, STORAGE AND HANDLING A. Follow special storage and handling requirements to prevent warpage. Keep flat until ready to use. Never store in sun or areas where moisture is present. PART 2 – PRODUCTS 2.01 APPROVED MANUFACTURERS / SUPPLIERS Ray-Bar Engineering Corporation, Phone (626) 969-1818 or Toll Free (800) 444-XRAY (9729) · Fax (800)333-XRAY, www.raybar.com, e-mail sales@raybar.com, a recognized domestic manufacturer regularly engaged in the successful production of the x-Ray Protection Materials specified herein for over 70 years.

2.02 MATERIALS A. RAY-BAR lead backed drywall is furnished as 5/8”. Fire code gypsum board, with lead meeting Federal Specification QQ-L-201f, Grade C, 99.9% Pure, and ASTM B749, Type L51121, factory laminated under pressure to the backside of the gypsum panel with lead thickness value clearly labeled on lead side of each board. * Fire Resistant Lead backed plywood also available where required for heavy lead shielded walls or partitions. B. Fire-rated lead backed drywall (Type RB-LBG) available as U.L. Classified to U.S. and Canadian Safety Standards (See complete marking on product must...

2. Where outlet boxes, junction boxes, ducts, conduit and similar items prevent the use of shields, provide lead sleeves or lead lining or backing as required with proper overlaps. Provide lead lining, sleeves, shields and other protections of equivalent thickness of lead as used in the wall partition shielding system that each penetration occurs in. C. No other trades or persons to occupy room or work area during lead installation. D. All lead trimmings must be recycled or disposed of in compliance with applicable health, safety and environmental codes and regulations. Properly and...