USG Cavity Shaft Wall Systems

Part 1: General

1.1 Scope
Specify to meet project requirements.

1.2 Qualifications
All materials, unless otherwise indicated, shall be manufactured by United States Gypsum Company, and shall be installed in accordance with its current printed instructions. Upon request United States Gypsum Company will provide certification that its products meet the applicable Company and ASTM standards as well as the performance values identified herein.

1.3 Delivery and Storage of Materials
All materials shall be delivered in their original unopened packages and stored in an enclosed shelter providing protection from damage and exposure to the elements. Damaged or deteriorated materials shall be removed from the premises. WARNING: Store all SHEETROCK brand Gypsum Panels flat. Panels are heavy and can fall over, causing serious injury or death. Do not move unless authorized.

1.4 Submittals
Submit certification of compliance with fire and sound requirements indicated. Fire rating compliance shall include verification of compatibility with labeled elevator door frame installation and test verification of call box and similar penetrations. Provide additional certification as follows:

1 Fire test verification of damper penetration acceptability.

2  Fire test verification of horizontal Shaft Wall installation.

3  Test verification of fatigue failure resistance through 1,000,000 cycles at pressure of 7.5 psf and at max. deflection of L/240.

4  Samples of studs that exhibit continuous edge support of liner panels.

5  Code compliance documentation.

1.5 Environmental Conditions
A In cold weather during gypsum panel joint finishing, temperatures within the building shall be maintained above 55 °F (13 °C). Adequate ventilation shall be provided to carry off excess moisture.

B For gypsum base and veneer finish application, SHEETROCK Setting-Type (DURABOND) or Lightweight Setting-Type (EASY SAND) Joint Compound and SHEETROCK Joint Tape shall be used on all joints and internal corners and allowed to set thoroughly before plaster application.

1.6 Protection
All materials shall be suitably protected from the weather during installation to prevent damage to the shaft wall.

Part 2: Products

2.1 Materials
A  Liner Board—1" SHEETROCK brand Gypsum Liner Panels, beveled edge, 24" wide, lengths as required. Identified with UL Classification label.

B  Faceboards—(1/2") (5/8") (3/4") thick, 48" wide, tapered edge, SHEETROCK brand Gypsum Panels, (SW Edge) (FIRECODE Core) (FIRECODE C Core) (ULTRACODE Core), lengths as required. Identified with UL Classification label.

C Gypsum Base—(1/2") (5/8") thick, 48" wide, square-edge Imperial (FIRECODE Core) (FIRECODE C Core) Gypsum Base, lengths as required.

D  Joint Treatment—(select a United States Gypsum Company Joint System).

E  Fasteners—Screws: (3/8") (1/2") Type (S) (S-12) pan head; 5/8" Type S-12 low profile head; (1") (1-5/8") (2-1/4") Type S bugle head. Durock Steel Screws: 1-5/8". Type G Screws: 1-1/2".

F SHEETROCK Metal Trim—No. (200A) (200B) (401) (402) (701B) (801B).

G  SHEETROCK Corner Bead—(Dur-A-Bead) (No. 800) (No. "00).

H  Metal Furring Channels.

I   RC-1 Resilient Channels or equivalent.

J  USG Steel C-H Studs, (212CH25) (212CH22) (212CH20) (400CH25) (400CH20) (600CH20) hot-dipped galvanized, lengths as required (select from tables).

K USG Steel E-Studs, (212ES25) (212ES20) (400ES25) (400ES20) (600ES25) (600ES20) hot-dipped galvanized, lengths as required (select from tables).

L  USG Steel J-Runners, (212JR24) (400JR24) (600JR24) (212JR20) (400JR20) (600JR20) hot-dipped galvanized, for USG Steel C-H and E-Studs.

M  Steel Jamb Struts, (212JS20) (400JS20) (600JS20) hot-dipped galvanized (for elevator door framing).

N  Runner fasteners, power-driven type, to withstand 1"3 lb. single shear and 200 lb. bearing force when driven through structural head or base and without exceeding allowable design stress in runner, fastener or structural support (obtain locally).

O SHEETROCK Acoustical Sealant.

P Thermafiber Sound Attenuation Fire Blankets—(1") (1-1/2") (3") 24"x48".

Q  Zinc Control Joint 093.

R  Cement Board—Durock Cement Board, 1/2" thickness, 48" width x 96" length.