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ASTM C1858-17

(Practice)

Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground Motions

Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground Motions

SIGNIFICANCE AND USE
5.1 This practice provides a standardized installation procedure for ceilings designed and installed as a diaphragm. When installed according to this practice, these ceilings have sufficient strength to resist seismic forces without lateral force bracing.
SCOPE
1.1 This practice covers the installation requirements of direct hung suspended t-bar type ceiling systems intended to receive gypsum panel products constructed as flat, single level, surrounded on all sides by a wall, bulk head, or soffit braced to the building structure to resist the effects of earthquake ground motions.  
1.2 Ceiling assembly shall not be intended to support live loads.  
1.3 This standard addresses ceiling systems with dead loads up to 10 lbs/ft2 (48.8 kg/m2).  
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.5 The text of this standard references notes and footnotes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the standard  
1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate standard safety and health practices and determine the applicability of regulatory limitations prior to use.  
1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

Status
Historical
Publication Date
14-May-2017
ICS
91.060.30 - Ceilings. Floors. Stairs
Technical Committee
C11 - Gypsum and Related Building Materials and Systems
Drafting Committee
C11.03 - Specifications for the Application of Gypsum and Other Products in Assemblies
Current Stage
Ref Project

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ASTM C1858-17 - Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground MotionsASTM C1858-17 - Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground Motions
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ASTM C1858-17 - Standard Practice for Design, Construction, and Material Requirements for Direct Hung Suspended T-bar Type Ceiling Systems Intended to Receive Gypsum Panel Products in Areas Subject to Earthquake Ground Motions
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C1858 − 17
Standard Practice for
Design, Construction, and Material Requirements for Direct
Hung Suspended T-bar Type Ceiling Systems Intended to
Receive Gypsum Panel Products in Areas Subject to
1
Earthquake Ground Motions
This standard is issued under the fixed designation C1858; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 This practice covers the installation requirements of
2.1 ASTM Standards:
direct hung suspended t-bar type ceiling systems intended to A641/A641M Specification for Zinc–Coated (Galvanized)
2
receive gypsum panel products constructed as flat, single level, Carbon Steel Wire
surrounded on all sides by a wall, bulk head, or soffit braced to C635/C635M Specification for Manufacture, Performance,
the building structure to resist the effects of earthquake ground and Testing of Metal Suspension Systems for Acoustical
3
motions. Tile and Lay-in Panel Ceilings
C645 Specification for Nonstructural Steel Framing Mem-
1.2 Ceiling assembly shall not be intended to support live
4
bers
loads.
C754 Specification for Installation of Steel Framing Mem-
1.3 This standard addresses ceiling systems with dead loads 4
bers to Receive Screw-Attached Gypsum Panel Products
2 2
up to 10 lbs/ft (48.8 kg/m ).
C1177/C1177M Specification for Glass Mat Gypsum Sub-
4
1.4 The values stated in either SI units or inch-pound units strate for Use as Sheathing
4
C1396 Specification for Gypsum Board
are to be regarded separately as standard. The values stated in
each system may not be exact equivalents; therefore, each C1658/C1658M Specification for Glass Mat Gypsum Pan-
4
els
system shall be used independently of the other. Combining
values from the two systems may result in non-conformance
with the standard. 3. Terminology
1.5 The text of this standard references notes and footnotes 3.1 Definitions—Terms shall be as defined in Terminology
which provide explanatory material. These notes and footnotes
C11.
(excluding those in tables and figures) shall not be considered
3.2 Definitions of Terms Specific to This Standard:
as requirements of the standard
3.2.1 counter sloping wire, n—opposing suspension wire
1.6 This standard does not purport to address all of the
intended to counteract the force of an out of plumb suspension
safety concerns, if any, associated with its use. It is the
wire and maintain alignment of the system.
responsibility of the user of this standard to establish appro-
3.2.2 cross runner, n—the secondary support members or
priate standard safety and health practices and determine the
cross beams of a mechanical ceiling suspension system trans-
applicability of regulatory limitations prior to use.
ferring ceiling load to the main runner.
1.7 This international standard was developed in accor-
3.2.3 diaphragm, n—horizontal system acting to transmit
dance with internationally recognized principles on standard-
lateral forces to the vertical resisting elements.
ization established in the Decision on Principles for the
3.2.4 direct hung ceiling, n—load carrying ceiling compo-
Development of International Standards, Guides and Recom-
nents that are fastened directly to structure.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.2.5 main runner, n—the primary or main beams (supports)
of the ceiling suspension system.
1
This test method is under the jurisdiction ofASTM Committee C11 on Gypsum
and Related Building Materials and Systems and is the direct responsibility of
Subcommittee C11.03 on Specifications for the Application of Gypsum and Other
2
Products in Assemblies. Annual ASTM Book of Standards,Vol.01.06.
3
Current edition approved May 15, 2017. Published May 2017. DOI: 10.1520/ Annual ASTM Book of Standards,Vol.04.06.
4
C1858-17 Annual ASTM Book of StandardsVol.04.01.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C1858 − 17
2
3.2.6 t-bar ceiling, n—modular interlocking suspended ceil- shall be used. For ceiling weights greater than 6 lb/ft
2 2 2
ing system containing framing members with inverted (2.7 kg⁄m ), but not more than 10 lb/ft (4.6/m ), see Specifi-
T-shaped profiles. cation C754 Table 6.
6.3 Grid members shall conform to the requirements of
4. Summary of Practice
Specification C645.
4.1 This practice outlines the design and installation re-
quirements of direct hung gypsum t-bar ceilings exempt from
7. Installation
lateral bracing in areas subject to seismic activity.
7.1 The in
...

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5.1 This practice provides a standardized installation procedure for ceilings designed and installed as a diaphragm. When installed according to this practice, these ceilings have sufficient strength to resist seismic forces without lateral force bracing.
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1.1 This practice covers the installation requirements of direct hung suspended t-bar type ceiling systems intended to receive gypsum panel products constructed as flat, single level, surrounded on all sides by a wall, bulk head, or soffit braced to the building structure to resist the effects of earthquake ground motions.  
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Standard Practice for Preparing Concrete Floors to Receive Resilient Flooring

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This practice covers the procedure for determining the acceptability of concrete floors for the installation of resilient flooring. It also includes suggestions for ensuring that the constructed concrete floor is acceptable for such installations but does not cover tests for adequacy of the concrete floor to perform structural requirements. A permanent, effective moisture vapor retarder, of the specified thickness and permeance, is required under all on- or below-grade concrete floors. Concrete floors for resilient floorings should be permanently dry, clean, smooth, structurally sound, and free of substances that may prevent adhesive bonding. Surface cracks, grooves, depression, control joints or other non-moving joints, and other irregularities should be filled or smoothed with latex patching or a recommended underlayment compound. The surface of the floor should be cleaned by scraping, brushing, vacuuming, or any other method. All concrete slabs should be tested for moisture regardless of age or grade level while all concrete floors should be tested for pH before installing resilient flooring.
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1.1 This practice covers the determination of the acceptability of a concrete floor for the installation of resilient flooring.  
1.2 This practice includes suggestions for the construction of a concrete floor to ensure its acceptability for installation of resilient flooring.  
1.3 This practice does not cover the adequacy of the concrete floor to perform its structural requirements.  
1.4 This practice covers the necessary preparation of concrete floors prior to the installation of resilient flooring.  
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1.6 Although carpet tiles, carpet, wood flooring, coatings, films, and paints are not specifically intended to be included in the category of resilient floor coverings, the procedures included in this practice may be useful for preparing concrete floors to receive such finishes.  
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