instructions, for both vertical (shaft enclosure) and horizontal (duct enclosure) applications.
Seal perimeters and openings to provide airtight installation.
Install sloped gypsum board cants on hoistway side of shaftwall where
slabs or beams project beyond shaftwall.
VENEER PLASTER INSTALLATION
Install gypsum base in accordance with ASTM C844. Apply gypsum
base with face side out.
2. Butt and fit abutting edges and ends together for light contact; do not force into place.
3. Do not locate fasteners closer than 3/8 inch from ends or edges of sheets. Set heads slightly below surface of gypsum base, but do not break paper face.
Drive screws with power screwdriver.
Single Layer Applications:
Position edges over support flanges.
To maintain true surface plane for installation on studs, arrange
direction of application so that leading edge of base is attached first to open edge of stud flange.
Double Layer Applications:
Apply gypsum base layer and face layer with long dimension parallel
to supports. Offset joints of face layer from base layer joints.
Fasten both base and face layers separately to supports.
Stagger and space fasteners in accordance with gypsum base
Use same fasteners to anchor trim accessory flanges as required to
fasten gypsum board to supports, unless otherwise recommended by trim manufacturer.
Install metal corner beads at external corners.
Install metal casing bead trim whenever edge of gypsum board would
otherwise be exposed or semi-exposed.