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ASTM C635-04

(Specification)

Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings

Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings

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1.1 This specification covers metal ceiling suspension systems used primarily to support acoustical tile or acoustical lay-in panels.
1.2 Some suspension systems incorporate locking assembly details that enhance performance by providing some continuity or load transfer capability between adjacent sections of the ceiling grid. The test methods included in this specification do not provide the means for making a complete evaluation of continuous beam systems, nor for assessing the continuity contribution to overall system performance. However, the test methods can be used for evaluating primary structural members in conjunction with secondary members that interlock, as well as with those of noninterlocking type.
1.3 While this specification is applicable to the exterior installation of metal suspension systems, the atmospheric conditions and wind loading require additional design attention to ensure safe implementation. For that reason, a specific review and approval should be solicited from the responsible architect and engineer, or both, for any exterior application of metal suspension systems in the construction of a new building or building modification.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are provided for information purposes only.
The following safety hazards caveat pertains only to the test methods described in this specification. 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 safety and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-Aug-2004
ICS
91.120.20 - Acoustics in building. Sound insulation
Technical Committee
E33 - Building and Environmental Acoustics
Drafting Committee
E33.04 - Application of Acoustical Materials and Systems
Current Stage
Ref Project

Relations

Replaces
ASTM C635-00 - Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings
Effective Date
01-Sep-2004
Replaced By
ASTM C635/C635M-07 - Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings
Effective Date
01-Oct-2007
Referred By
ASTM E580/E580M-22 - Standard Practice for Installation of Ceiling Suspension Systems for Acoustical Tile and Lay-in Panels in Areas Subject to Earthquake Ground Motions
Effective Date
01-Sep-2004
Referred By
ASTM E3090/E3090M-22 - Standard Test Methods for Strength Properties of Metal Ceiling Suspension Systems
Effective Date
01-Sep-2004

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ASTM C635-04 - Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel CeilingsASTM C635-04 - Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings
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ASTM C635-04 - Standard Specification for the Manufacture, Performance, and Testing of Metal Suspension Systems for Acoustical Tile and Lay-in Panel Ceilings
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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: C 635 – 04
Standard Specification for
the Manufacture, Performance, and Testing of Metal
Suspension Systems for Acoustical Tile and Lay-in Panel
1
Ceilings
This standard is issued under the fixed designation C635; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 2. Referenced Documents
2
1.1 This specification covers metal ceiling suspension sys- 2.1 ASTM Standards:
tems used primarily to support acoustical tile or acoustical B117 Practice for Operating Salt Spray (Fog) Apparatus
lay-in panels.
3. Terminology
1.2 Some suspension systems incorporate locking assembly
detailsthatenhanceperformancebyprovidingsomecontinuity 3.1 Definitions:
3.1.1 Where these terms appear in this specification they
or load transfer capability between adjacent sections of the
ceiling grid. The test methods included in this specification do shall have the meaning herein indicated as follows:
3.1.1.1 backing board— a flat sheet of gypsum board to
not provide the means for making a complete evaluation of
continuous beam systems, nor for assessing the continuity which acoustical tile is attached using adhesive, screws,
staples, or other suitable means (Fig. 1c).
contribution to overall system performance. However, the test
methods can be used for evaluating primary structural mem- 3.1.1.2 bow—the maximum component of deviation in the
vertical plane of a main runner, cross runner, or wall molding
bers in conjunction with secondary members that interlock, as
well as with those of noninterlocking type. where the centroidal axis of these structural components has
been permanently deformed from end to end into the shape of
1.3 While this specification is applicable to the exterior
installation of metal suspension systems, the atmospheric a simple regular curve during the manufacturing process (Fig.
2).
conditionsandwindloadingrequireadditionaldesignattention
to ensure safe implementation. For that reason, a specific
NOTE 1—Themeaningsfor bowand cambergivenheremaydifferfrom
review and approval should be solicited from the responsible
those applied elsewhere.
architect and engineer, or both, for any exterior application of
3.1.1.3 camber—the maximum component of deviation in
metalsuspensionsystemsintheconstructionofanewbuilding
the horizontal plane of a main runner, cross runner, or wall
or building modification.
molding where the centroidal axis of these structural compo-
1.4 The values stated in inch-pound units are to be regarded
nents has been permanently deformed from end to end into the
as the standard. The values given in parentheses are provided
shape of a simple regular curve during the manufacturing
for information purposes only.
process (Fig. 2).
1.5 The following safety hazards caveat pertains only to the
3.1.1.4 carrying channel or hanging channel—the three-
testmethodsdescribedinthisspecification. This standard does
sided or “[”-shaped metal sections that support the entire
not purport to address all of the safety concerns, if any,
structural grid network in some forms of mechanical ceiling
associated with its use. It is the responsibility of the user of this
suspension systems (Fig. 1b). The carrying channels are
standard to establish appropriate safety and health practices
usually suspended by hanger wires from the existing structure
and determine the applicability of regulatory limitations prior
and the main runners are then attached to the channels.
to use.
3.1.1.5 ceiling suspension system—the entire network or
grid of structural components, as defined by the ceiling
1
This specification is under the jurisdiction of ASTM Committee E33 on
2
EnvironmentalAcousticsandisthedirectresponsibilityofSubcommitteeE33.04on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Application of Acoustical Materials and Systems. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved Sept. 1, 2004. Published October 2004. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1969. Last previous edition approved in 2000 as C635–00. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
C635–04
FIG. 1 Three Types of Ceiling Suspension Systems Showing All Components
suspension system manufacturer, that provides support for forms of suspension systems, however, the cross runners also
acoustical ceiling
...

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1.1 This test method covers the measurement of airflow resistance and the related measurements of specific airflow resistance and airflow resistivity of porous materials that can be used for the absorption and attenuation of sound. Materials cover a range from thick boards or blankets to thin mats, fabrics, papers, and screens. When the material is anisotropic, provision is made for measurements along different axes of the specimen.  
1.2 This test method is designed for the measurement of values of specific airflow resistance ranging from 100 to 10 000 mks rayls (Pa·s/m) with linear airflow velocities ranging from 0.5 mm/s to 50 mm/s and pressure differences across the specimen ranging from 0.1 Pa to 250 Pa. The upper limit of this range of linear airflow velocities is a point at which the airflow through most porous materials is in partial or complete transition from laminar to turbulent flow.  
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1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
1.4.1 Table 1 is provided for user to convert into cgs units.    
cgs acoustic ohm  
mks acoustic ohm (Pa·s/m3)  
105  
cgs rayl  
mks rayl (Pa·s/m)  
10    
cgs rayl/cm  
mks rayl/m (Pa·s/m2)  
103  
cgs rayl/in.  
mks rayl/m (Pa·s/m2)  
394  
mks rayl/in.  
mks rayl/m (Pa·s/m2)  
39.4  
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1.2 The results of this test method can be used to determine if and where the masking sound meets (or does not meet) a particular specification.  
1.3 This test method does not evaluate the overall acoustical environment. It is intended only to measure and report the masking sound levels.  
1.4 The values stated in SI units are to be regarded as standard. The values in parentheses are for information only.  
1.5 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 safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.6 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.

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  • Standard
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    English language
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