HomeMy WebLinkAbout09111.pdf BICKFORD OF CARMEL, IN 12/12/2012
SUSPENDED CEILINGS 09111 - 1
SECTION 09111 – SUSPENDED CEILINGS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 1 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section Includes:
1. Suspension systems for interior gypsum ceilings, soffits, and grid systems.
B. Related Requirements:
1. Division 5 Section "Cold-Formed Metal Framing" for exterior and interior load-bearing and
exterior non-load-bearing wall studs; floor joists; roof rafters and ceiling joists; and roof
trusses.
1.3 ACTION SUBMITTALS
A. Product Data: For each type of product.
PART 2 - PRODUCTS
2.1 PERFORMANCE REQUIREMENTS
A. Fire-Test-Response Characteristics: For fire-resistance-rated assemblies that incorporate non-
load-bearing steel framing, provide materials and construction identical to those tested in
assembly indicated, according to ASTM E 119 by an independent testing agency.
2.2 SUSPENSION SYSTEMS
A. Tie Wire: ASTM A 641/A 641M, Class 1 zinc coating, soft temper, 0.062-inch- (1.59-mm-)
diameter wire, or double strand of 0.048-inch- (1.21-mm-) diameter wire.
B. Wire Hangers: ASTM A 641/A 641M, Class 1 zinc coating, soft temper, 0.16 inch (4.12 mm) in
diameter.
C. Carrying Channels: Cold-rolled, commercial-steel sheet with a base-metal thickness of 0.053
inch (1.34 mm) and minimum 1/2-inch- (13-mm-) wide flanges.
1. Depth: 1-1/2 inches (38 mm) min.
D. Grid Suspension System for Gypsum Board Ceilings: ASTM C 645, direct-hung system
composed of main beams and cross-furring members that interlock.
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1. Products: Subject to compliance with requirements, available products that may be
incorporated into the Work include, but are not limited to, the following:
a. Armstrong World Industries, Inc.; Drywall Grid Systems.
b. Chicago Metallic Corporation; Drywall Grid System.
c. USG Corporation; Drywall Suspension System.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine areas and substrates, with Installer present, and including welded hollow-metal
frames, cast-in anchors, and structural framing, for compliance with requirements and other
conditions affecting performance of the Work.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Suspended Assemblies: Coordinate installation of suspension systems with installation of
overhead structure to ensure that inserts and other provisions for anchorages to building
structure have been installed to receive hangers at spacing required to support the Work and
that hangers will develop their full strength.
1. Furnish concrete inserts and other devices indicated to other trades for installation in
advance of time needed for coordination and construction.
B. Coordination with Sprayed Fire-Resistive Materials:
1. Before sprayed fire-resistive materials are applied, attach offset anchor plates or ceiling
runners (tracks) to surfaces indicated to receive sprayed fire-resistive materials. Where
offset anchor plates are required, provide continuous plates fastened to building structure
not more than 24 inches (610 mm) o.c.
2. After sprayed fire-resistive materials are applied, remove them only to extent necessary
for installation of non-load-bearing steel framing. Do not reduce thickness of fire-resistive
materials below that required for fire-resistance ratings indicated. Protect adjacent fire-
resistive materials from damage.
3.3 INSTALLATION, GENERAL
A. Installation Standard: ASTM C 754.
1. Gypsum Plaster Assemblies: Also comply with requirements in ASTM C 841 that apply
to framing installation.
2. Portland Cement Plaster Assemblies: Also comply with requirements in ASTM C 1063
that apply to framing installation.
3. Gypsum Veneer Plaster Assemblies: Also comply with requirements in ASTM C 844 that
apply to framing installation.
4. Gypsum Board Assemblies: Also comply with requirements in ASTM C 840 that apply to
framing installation.
B. Install supplementary framing, and blocking to support fixtures, equipment services, heavy trim,
grab bars, toilet accessories, furnishings, or similar construction.
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C. Install bracing at terminations in assemblies.
D. Do not bridge building control and expansion joints with non-load-bearing steel framing
members. Frame both sides of joints independently.
3.4 INSTALLING SUSPENSION SYSTEMS
A. Install suspension system components according to spacings indicated, but not greater than
spacings required by referenced installation standards for assembly types.
1. Hangers: 48 inches (1219 mm) o.c.
2. Carrying Channels (Main Runners): 48 inches (1219 mm) o.c.
B. Isolate suspension systems from building structure where they abut or are penetrated by
building structure to prevent transfer of loading imposed by structural movement.
C. Suspend hangers from building structure as follows:
1. Install hangers plumb and free from contact with insulation or other objects within ceiling
plenum that are not part of supporting structural or suspension system.
a. Splay hangers only where required to miss obstructions and offset resulting
horizontal forces by bracing, countersplaying, or other equally effective means.
2. Where width of ducts and other construction within ceiling plenum produces hanger
spacings that interfere with locations of hangers required to support standard suspension
system members, install supplemental suspension members and hangers in the form of
trapezes or equivalent devices.
a. Size supplemental suspension members and hangers to support ceiling loads
within performance limits established by referenced installation standards.
3. Wire Hangers: Secure by looping and wire tying, either directly to structures or to inserts,
eye screws, or other devices and fasteners that are secure and appropriate for substrate,
and in a manner that will not cause hangers to deteriorate or otherwise fail.
4. Do not attach hangers to steel roof deck.
5. Do not attach hangers to permanent metal forms. Furnish cast-in-place hanger inserts
that extend through forms.
6. Do not attach hangers to rolled-in hanger tabs of composite steel floor deck.
7. Do not connect or suspend steel framing from ducts, pipes, or conduit.
D. Fire-Resistance-Rated Assemblies: Wire tie furring channels to supports.
E. Grid Suspension Systems: Attach perimeter wall track or angle where grid suspension systems
meet vertical surfaces. Mechanically join main beam and cross-furring members to each other
and butt-cut to fit into wall track.
F. Installation Tolerances: Install suspension systems that are level to within 1/8 inch in 12 feet (3
mm in 3.6 m) measured lengthwise on each member that will receive finishes and transversely
between parallel members that will receive finishes.
END OF SECTION 09111