USG Cavity Wall Shaft Systems Page 3

Fire-rated Construction

Fire Rating

Detail &
Physical Data

1 hr.

Description & Test No.
Cavity Shaft Wall Gypsum Drywall—5/8" SHEETROCK brand gypsum panels, FIRECODE core, one side—1" SHEETROCK brand gypsum liner panels set betw USG steel C-H studs 24" o.c.—panels appl to side opp liner panels & screw att—joints fin—fire rating also applies with IMPERIAL FIRECODE base and veneer finish surface or THERMAFIBER in cavity—UL Des U469

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

2 hr.

Description & Test No.
Cavity Shaft Wall Gypsum Drywall—2 layers 1/2" SHEETROCK brand gypsum panels, FIRECODE C core, one side—1" SHEETROCK brand liner panels set betw USG steel 25 ga. C-H studs 24" o.c.—joints fin—rating also applies with IMPERIAL FIRECODE C base and veneer finish surface or THERMAFIBER in cavity—UL Des U438. Rating also applies to 5/8" Sheetrock brand gypsum panels, Firecode Core, and 5/8" IMPERIAL FIRECODE Base.

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

2 hr.

Description & Test No.
Cavity Shaft Wall—1" SHEETROCK brand gypsum liner panels, set betw 4" USG steel C-H studs 24" o.c. one side—3/4" SHEETROCK brand gypsum panels, Ultracode core, other side—3" THERMAFIBER SAFB—panels screw att 8" o.c. perim, 12" o.c. field—joints stag & fin—perimeter caulked—UL Des U492

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

2 hr.

Description & Test No.
Cavity Shaft Wall Cement Board/Gypsum Drywall—1/2" DUROCK cement board—5/8" SHEETROCK brand gypsum panels, Firecode core—1" SHEETROCK brand gypsum liner  panels set betw USG steel 20 ga. min C-H studs 24" o.c.—1-1/2" THERMAFIBER SAFB—cement board screw att with 1-5/8" DUROCK steel screws and laminated to gypsum panel with 4" strip DURABOND ceramic tile mastic applied with 3/4" notched trowel midway betw studs—joints fin—UL Des U459*

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

2 hr.

Description & Test No.
Cavity Shaft Wall Gypsum Drywall—1/2" SHEETROCK brand  gypsum panels, FIRECODE C core, one side—1" SHEETROCK brand gypsum liner panels set betw USG steel C-H studs 24" o.c. and 1/2" SHEETROCK brand Gypsum Panels, FIRECODE core, other side—joints of gypsum panels stag on opp sides & fin—rating also applies with IMPERIAL FIRECODE C base and veneer finish surface—UL Des U467. Rating also applies to 5/8" SHEETROCK brand panels,  FIRECODE Core, and 5/8" IMPERIAL FIRECODE Base.

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

2 hr. est

Description & Test No.
Cavity Shaft Wall Gypsum Drywall—2 layers 1/2" SHEETROCK brand gypsum panels, FIRECODE C core, one  side—1" SHEETROCK brand gypsum liner panels set betw  USG 25 ga. steel C-H studs 24" o.c.—RC-1 chan spaced 24" o.c.—1-1/2" THERMAFIBER SAFB—panels & RC-1 chan screw att to side opp liner panels—base layer appl horiz—face layer appl vert—joints fin—est. fire rating based on U of C 2-8-72 and U of C 6-23-75—rating also applies with IMPERIAL FIRECODE C base and veneer finish

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

3 hr.

Description & Test No.
Cavity Shaft Wall Gypsum Drywall—3 layers 3/4" SHEETROCK brand gypsum panels, ULTRACODE core—1st & 2nd layers app vert or horiz over stl stds— if appl vert joints cntrd over stds, stag min 24",  otherwise joints stag min 12"—3rd layer appl vert over fur chan—Joints fin with paper tape & joint cmpd—UL Des U408

Acoustical Performance

Fire-rated Construction

Fire Rating

Detail &
Physical Data

4 hr.

Description & Test No.
Cavity Shaft Wall Gypsum Drywall—4 layers 3/4" SHEETROCK brand gypsum panels, ULTRACODE core—1st 3 layers appl  as for 3 hr rating—4th layer appl vert or horiz—if apply  vert joints stag min 24" from 3rd layer—otherwise joints stag min 12"—joints fin with paper tape and joint compd—UL Des U408

Acoustical Performance