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5.

Size:  2 inches (51 mm) by 4 inches (102 mm) by 12 inches (305 mm).

6.

Size:  2-1/2 inches (63.5 mm) by 4 inches (102 mm) by 12 inches (305 mm).

2.6

LEAD-LAMINATED GYPSUM BOARD, GENERAL

A.

Fire-Resistance-Rated Assemblies:  For fire-resistance-rated assemblies, provide materials and construction identical to those tested in assembly indicated according to ASTM E 119 by UL (Underwriter’s Laboratories Inc.) or other independent testing agency.

1.

Lead-laminated gypsum panels shall be identified with the UL label affixed to the lead side indicating shielding material manufacturer and current fire-resistance listing and UL classification per the current UL Certifications Directory and as tested in accordance with the standard fire tests of building construction and materials per ANSI/UL 263.

B.

Recycled Content of Gypsum Panel Products:  Postconsumer recycled content plus one-half of preconsumer recycled content not less than <Insert number> percent.

C.

Regional Materials:  Gypsum panel products shall be manufactured within 500 miles (800 km) of Project site from materials that have been extracted, harvested, or recovered, as well as manufactured, within 500 miles (800 km) of Project site.

D.

Regional Materials:  Gypsum panel products shall be manufactured within 500 miles (800 km) of Project site.

E.

Size:  Provide maximum lengths and widths available that will minimize joints in each area and that correspond with support system indicated.

2.7

LEAD-LAMINATED GYPSUM BOARD

A.

Lead-Laminated Gypsum Board:  Single unpierced layer of sheet lead laminated to back of gypsum board.

1.

Fire-Resistance Rated Gypsum Board:  Type X, ASTM C 1396.

a.

Core:  Fire-resistant rated gypsum core  

b.

Surface paper:  100% recycled content paper on front, back and long edges

c.

Long Edges: [Square] [Tapered] [Beveled]

d.

Thickness:  [5/8 inch] [1/2 inch]

2.

Fire-Resistance Rated Gypsum Board With Enhanced Mold And Mildew:  Type X, ASTM C 1396.

a.

Core: Mold and moisture resistant, fire-resistance rated gypsum core

b.

Surface paper: 100% recycled content moisture/mold/mildew resistant paper on front, back and long edges.

c.

Long Edges: [Square] [Tapered] [Beveled]

d.

Thickness:  [5/8 inch] [1/2 inch]

e.

Mold/Mildew Resistance: 10 when tested in accordance with ASTM D 3273 Standard Test Method for Resistance to Growth of Mold on the Surface of Interior Coatings in an Environmental Chamber

3.

Abuse-Resistance Gypsum Board:  Type X, ASTM C 1396.

a.

Classification: Level 2 - Moderate Duty in accordance with ASTM C 1629 Standard Classification for Abuse-Resistant Nondecorated Interior Gypsum Panel Products and Fiber-Reinforced Cement Panels.

b.

Core: Fire resistance rated gypsum core, with additives to enhance, surface indentation resistance and impact resistance

c.

Surface Paper:  Abrasion-resistant, 100% recycled content moisture/mold/mildew resistant paper on front, back and long edges.

d.

Long Edges: [Tapered] [Square]

e.

Thickness:  [5/8 inch] [1/2 inch]

RADIATION PROTECTION13 49 00 - 6

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