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Chapter 25: Gypsum Board, Gypsum Panel Products and Plaster
Section BC 2501: General
Section BC 2502: Definitions
Section BC 2503: Reserved
Section BC 2504: Vertical and Horizontal Assemblies
Section BC 2505: Shear Wall Construction
Section BC 2506: Gypsum Board and Gypsum Panel Product Materials
Section BC 2507: Lathing and Plastering
2507.1 General.
2507.2 Standards.
Section BC 2508: Gypsum Construction
Section BC 2509: Showers and Water Closets
Section BC 2510: Lathing and Furring for Cement Plaster (Stucco)
Section BC 2511: Interior Plaster
Section BC 2512: Exterior Plaster
Section BC 2513: Exposed Aggregate Plaster
Section BC 2514: Reinforced Gypsum Concrete
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Chapter 35: Referenced Standards
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2506.2 Standards.
Gypsum board and gypsum panel products shall conform to the appropriate standards listed in Table 2506.2 and Chapter 35 and, where required for fire protection, shall conform to the provisions of Chapter 7.
Table 2506.2
Gypsum Board and Gypsum Panel Products Materials and Accessories
Material
Standard 
Material
Standard 
Abuse resistant non-decorated interior gypsum panel products and fiber-reinforced cement panels
ASTM C 1629
Accessories for gypsum board
ASTM C 1047
Adhesives for fastening gypsum wallboard
ASTM C 557
Cold-formed steel studs and track, structural
AISI S200 and ASTM C 955, Section 8
Cold-formed steel studs and track, nonstructural
AISI S220 and ASTM C 645, Section 10
Elastomeric joint sealants
ASTM C 920
Fiber-reinforced gypsum panels
ASTM C 1278
Glass mat gypsum backing panel
ASTM C 1178
Glass mat gypsum panel 5
ASTM C 1658
Glass mat gypsum substrate
ASTM C 1177
Joint reinforcing tape and compound
ASTM C 474; C 475
Nails for gypsum boards
ASTM C 514, F 547, F 1667
Steel screws
ASTM C 954; C 1002
Standard specification for gypsum board
ASTM C 1396
Testing gypsum and gypsum products
ASTM C 22; C 472; C 473
 
2506.2.1 Other materials.
Metal suspension systems for acoustical and lay-in panel ceilings shall conform with Section 808.1.
2506.3 Mold resistance.
Gypsum board or cement board, used in an assembly for the following areas, shall have a mold resistance rating of 10 in accordance with ASTM D 3273:
   1.   Interior faces of exterior walls of basements, cellars, and other below grade rooms.
   2.   Walls and ceilings of spaces containing condensers, water tanks, water pumps, and pressure reduction valves.
   3.   Walls and ceilings of laundry rooms.
   4.   Portions of walls within 2 feet (610 mm) of kitchen sinks to a height of 4 feet (1219 mm) above the floor.
   5.   Portions of walls within 2 feet (610 mm) of kitchen stoves to a height of 4 feet (1219 mm) above the floor.
   6.   Walls of bathrooms that are not solely water closet compartments, other than walls specifically required to be cement board.
   7.   Walls and ceilings in service sink closets.
   8.   Portions of walls within 2 feet (610 mm) of mop sinks or service sinks to a height of 4 feet (1219 mm) above the floor.
Editor's note: For related unconsolidated provisions, see Appendix A at L.L. 2014/013.
Section BC 2507: Lathing and Plastering
2507.1 General.
Lathing and plastering materials and accessories shall be marked by the manufacturer's designation to indicate compliance with the appropriate standards referenced in this section and stored in such a manner to protect them from the weather.
2507.2 Standards.
Lathing and plastering materials shall conform to the standards listed in Table 2507.2 and Chapter 35 and, where required for fire protection, shall also conform to the provisions of Chapter 7.
Table 2507.2
Lath, Plastering Materials and Accessories
Material
Standard 
Material
Standard 
Accessories for gypsum veneer base
ASTM C 1047
Blended cement
ASTM C 595
Cold-formed steel studs and track, nonstructural
AISI S220 and ASTM C 645, Section 10
Cold-formed steel studs and track, structural
AISI S200 and ASTM C 955, Section 8
Exterior plaster bonding compounds
ASTM C 932
Gypsum casting and molding plaster
ASTM C 59
Gypsum Keene's cement
ASTM C 61
Gypsum plaster
ASTM C 28
Gypsum veneer plaster
ASTM C 587
Hydraulic cement
ASTM C 1157; C 1600
Interior bonding compounds, gypsum
ASTM C 631
Lime plasters
ASTM C 5; C 206
Masonry cement
ASTM C 91
Metal lath
ASTM C 847
Plaster aggregates
   Sand
   Perlite
   Vermiculite

ASTM C 35; C 897
ASTM C 35
ASTM C 35
Plastic cement
ASTM C 1328
Portland cement
ASTM C 150
Steel screws
ASTM C 1002; C 954
Welded wire lath
ASTM C 933
Woven wire plaster base
ASTM C 1032
 

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