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USG SHAFT WALL SYSTEM

USG Shaft Walls provide up to 4-hour fire resistance and sound ratings to 51 STC. They resist intermittent lateral loads up to 15 psf; also resist fatigue failure under cyclic lateral loading. USG Cavity Shaft Walls are non-load bearing gypsum board partition assemblies designed for erection from outside the shaft at each floor.

SHEETROCK brand Gypsum Liner Panels are installed vertically between steel J-Runners attached to floor and ceiling. Panel edges are inserted into specially formed C-H Studs spaced 24" on center The 2-hour shaft wall is completed with double-layer ½ inch thick gypsum panels and a United States Gypsum Company joint system, or with gypsum base and veneer finish applied to one side. Where both sides of the wall must be finished, single-layer panels are applied to each side of studs. A 1 -hour assembly is obtained with single-layer 5/8 inch thick face panels.

USG Cavity Shaft Wall Systems have been designed and tested using accepted engineering practices with deflection criteria of L/120, L/240 and L/360 clear partition heights. They are covered by three model building codes under NER 258.

USG Cavity Shaft Wall Systems are approved under NER 258 for horizontal applications to provide 1- and 2-hour fire-resistive protection to corridor ceilings or the underside of stairs.

USG Cavity Shaft Wall System is the only wall for which a UL smoke and fire damper test is available.

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  • 1.

    GENERAL

  • 1.

    SUMMARY

    • 1.

      Description of Work: Work of this Section includes, but is not limited to, the

following:

      • 1.

        Gypsum board and accessories.

      • 2.

        Veneer plaster.

      • 3.

        Metal studs.

      • 4.

        Metal shaftwall systems.

      • 5.

        Gypsum board finishing.

      • 6.

        Trim and accessories.

  • 2.

    RELATED WORK SPECIFIED ELSEWHERE

    • 1.

      See Section 09900 PAINTING AND FINISHING for gypsum board prime and

finish coats.

  • 3.

    SUBMITTALS

  • 1.

    Product Data: Submit manufacturer's specifications and installation

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