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ASTM C636-96

(Practice)

Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels

Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels

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1.1 This practice covers the installation of suspension systems for acoustical tile and lay-in panels. It is applicable to contractors whose services are utilized for installing acoustical ceilings and to other trades if their activities are responsible for interference with ceiling components or performance as defined in this recommended practice.  
1.2 While the practices described in this document have equal application to rated fire-resistive suspension systems, additional requirements may have been imposed to obtain the fire endurance classification of particular floor-ceiling or roof-ceiling assemblies. These details should be obtained from the manufacturers.  
1.3 Similarly, additional detailing may be necessary to meet sound attenuation requirements when ceiling plenums extend over contiguous rooms. These, too, should be obtained from the manufacturer of the acoustical material employed.  
1.4 The values stated in inch-pound units are to be regarded as the standard.
1.5 While many of the practices described in this practice have application to the installation of metal suspension systems in exterior environments, the specific design of exterior ceiling installations requires the review and approval of the architect, engineer, or both, who are responsible for the construction of the building or modifications to an existing building. While recommendations from the manufacturer should be solicited, it remains the final responsibility of the architect/engineer to ensure proper application of the materials in question.  
1.6 This standard does not purport to address 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
09-Jun-1996
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

Replaced By
ASTM C636-03 - Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels
Effective Date
01-Oct-2003
Referred By
ASTM E1414/E1414M-21a - Standard Test Method for Airborne Sound Attenuation Between Rooms Sharing a Common Ceiling Plenum
Effective Date
10-Jun-1996
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
10-Jun-1996

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ASTM C636-96 - Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In PanelsASTM C636-96 - Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels
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ASTM C636-96 - Standard Practice for Installation of Metal Ceiling Suspension Systems for Acoustical Tile and Lay-In Panels
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 636 – 96
Standard Practice for
Installation of Metal Ceiling Suspension Systems for
Acoustical Tile and Lay-In Panels
This standard is issued under the fixed designation C 636; 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 (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 2.1.1 Where acoustical ceilings are suspended from a struc-
ture of wood construction, attach hangers with suitable me-
1.1 This practice covers the installation of suspension sys-
chanical devices either to the bottom edge of the wood joists or
tems for acoustical tile and lay-in panels. It is applicable to
to the vertical face of the wood joists near the bottom edge.
contractors whose services are utilized for installing acoustical
Holding power tests certified by the manufacturer must be
ceilings and to other trades if their activities are responsible for
available on request for bottom edge attachment devices.
interference with ceiling components or performance as de-
2.1.2 Where acoustical ceilings are suspended from a struc-
fined in this recommended practice.
ture of concrete construction, mount hangers using cast-in-
1.2 While the practices described in this document have
place hanger wires, hanger inserts, or other hanger attachment
equal application to rated fire-resistive suspension systems,
devices whose suitability has been demonstrated by standard
additional requirements may have been imposed to obtain the
construction practice or by certified test data.
fire endurance classification of particular floor-ceiling or roof-
2.1.3 Space hangers for carrying channels or main runners 4
ceiling assemblies. These details should be obtained from the
ft 0 in. (1.2 m) on centers. If local situations allow greater
manufacturers.
center distances between hangers, reduce the load-carrying
1.3 Similarly, additional detailing may be necessary to meet
capacity of the ceiling suspension system commensurate with
sound attenuation requirements when ceiling plenums extend
the actual center-to-center hanger distances used.
over contiguous rooms. These, too, should be obtained from
2.1.4 Each suspension wire shall not hang more than one in
the manufacturer of the acoustical material employed.
six out of plumb unless a countersloping wire or horizontal
1.4 The values stated in inch-pound units are to be regarded
bracing is provided. See Fig. 1 for allowable countersloping
as the standard.
methods. Suspension wires should not press against ducts or
1.5 While many of the practices described in this practice
pipes.
have application to the installation of metal suspension systems
2.1.5 Hangers formed from galvanized sheet metal stock
in exterior environments, the specific design of exterior ceiling
shall be suitable for suspending carrying channels or main
installations requires the review and approval of the architect,
runners from an existing structure provided that the hangers do
engineer, or both, who are responsible for the construction of
not yield, twist, or undergo other objectionable movement.
the building or modifications to an existing building. While
2.1.6 Wire hangers for suspending carrying channels or
recommendations from the manufacturer should be solicited, it
main runners from an existing structure shall be prepared from
remains the final responsibility of the architect/engineer to
a minimum of No. 12-gage (2.05-mm) galvanized, soft-
ensure proper application of the materials in question.
annealed, mild steel wire.
1.6 This standard does not purport to address of the safety
2.1.7 In some installations hanger wires are secured to
concerns, if any, associated with its use. It is the responsibility
special attachment devices that support the carrying channels
of the user of this standard to establish appropriate safety and
or main runners. Such attachment devices shall have certified
health practices and determine the applicability of regulatory
load test data from an independent test laboratory and shall be
limitations prior to use.
capable of carrying five times the design load.
2. Installation of Components
2.2 Carrying Channels:
2.2.1 Install the carrying channels so that they are all level
2.1 Hangers:
to within ⁄8 in. in 12 ft (3.2 mm in 3.66 m).
2.2.2 Perform leveling with the supporting hangers taut to
This practice is under the jurisdiction of ASTM Committee E-33 on Environ-
prevent any subsequent downward movement of the carrying
mental Acoustics and is the direct responsibility of Subcommittee E33.04 on
channels when the ceiling loads are imposed.
Application of Acoustical Materials and Systems.
2.2.3 Local kinks or bends shall not be made in hanger wires
Current edition approved June 10, 1996. Published August 1996. Originally
e1
published as C 636 – 69. Last previous edition C 636 – 92 .
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 636
FIG. 1 Allowable Countersloping Methods
as a means of leveling carrying channels. the measurements after completion of the ceiling installations
2.2.4 In installations where hanger wires are wrapped but prior to building occupancy.
around carrying channels, the wire loops shall be tightly 2.3.2 Where main runners are supported directly by hang-
formed to prevent any vertical movement or rotation of the ers, perform leveling with the supporting hanger taut to prevent
member within the loop. any subsequent downward movement of the main runners
2.3 Main Runners: when the ceiling loads are imposed.
2.3.1 Install main runners so that they are all level to within 2.3.3 Local kinks or bends shall not be made in hanger wires
⁄4 in. in 10 ft (6.4 mm in 3.05 m). Determine evaluation of as a means of leveling main runners.
levelness from measurements taken below hanger points. Make 2.3.4 In installations where hanger wires are wrapped
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 636
through or around main runners, the wire loops shall be tightly 2.7 Ceiling Fixtures:
wrapped and sharply bent to prevent any vertical movement or
...

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5.1 The acoustical impedance properties of a sound absorptive material are related to its physical properties, such as airflow resistance, porosity, elasticity, and density. As such, the measurements described in this test method are useful in basic research and product development of sound absorptive materials.  
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5.3 Estimates of the random incidence or statistical absorption coefficients for materials can be obtained from normal incidence impedance data. For materials that are locally reacting, that is, without sound propagation inside the material parallel to its surface, statistical absorption coefficients can be estimated from specific normal acoustic impedance values using an expression derived by London (1).5 Locally reacting materials include those with high internal losses parallel with the surface such as porous or fibrous materials of high density or materials that are backed by partitioned cavities such as a honeycomb core. Formulas for estimating random incidence sound absorption properties for both locally and bulk-reacting materials, as well as for multilayer systems with and without air spaces have also been developed (2).
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1.1 This test method covers the use of an impedance tube, alternatively called a standing wave apparatus, for the measurement of impedance ratios and the normal incidence sound absorption coefficients of acoustical materials.  
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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SIGNIFICANCE AND USE
5.1 The specific airflow resistance of an acoustical material is one of the properties that determine its sound-absorptive and sound-transmitting properties. Measurement of specific airflow resistance is useful during product development, for quality control during manufacture, and for specification purposes.  
5.2 Valid measurements are made only in the region of laminar airflow where, aside from random measurement errors, the airflow resistance (R = P/U) is constant. When the airflow is turbulent, the apparent airflow resistance increases with an increase of volume velocity and the term “airflow resistance” does not apply.  
5.3 The specific airflow resistance measured by this test method may differ from the specific resistance measured by the impedance tube method in Test Method E384 for two reasons. In the presence of sound, the particle velocity inside a porous material is alternating while in this test method, the velocity is constant and in one direction only. Also, the particle velocity inside a porous material is not the same as the linear velocity measured outside the specimen.
SCOPE
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.  
1.3 A procedure for accrediting a laboratory for the purposes of this test method is given in Annex A1.  
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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ASTM C634-22(Terminology)
Standard Terminology Relating to Building and Environmental Acoustics

SIGNIFICANCE AND USE
3.1 Definitions—Terms and related definitions given in Section 4 are intended for use uniformly and consistently in all building and environmental acoustic test standards in which they appear.  
3.2 Definitions of Terms Specific to Each Standard:  
3.2.1 As indicated in Section 4, terms and their definitions are intended to provide a precise understanding and interpretation of the building and environmental acoustic test standards in which they appear.  
3.2.2 A specific definition of a given term is applicable to the standard or standards in which the term is described and used.  
3.2.3 Different definitions of the same term are acceptable provided each one is consistent with and is not in conflict with the standard definition for the same term, that is, the general concept the term describes.  
3.2.4 If a standard under the jurisdiction of ASTM Committee E33 specially defines a term, i.e. provides a definition different in any way from what is given in Section 4 of Terminology C634, that standard shall list the term and its description under the subheading, Definitions of Terms Specific to This Standard.
3.2.4.1 Discussion—The mandatory language of section 3.2.4 is consistent with the mandatory language from §E2 of Form and Style for ASTM Standards (April 2020) and with the ASTM Committee E33 bylaws in place when this standard was published; it reflects a situation that exists, it does not prescribe anything.  
3.3 Definitions for some terms associated with building and environmental acoustic issues and not included in Terminology C634 are found in ISO/TR 25417 or IEEE P260.4. When discrepancies exist, the definition in Terminology C634 shall prevail.
SCOPE
1.1 This terminology covers terms, related definitions, and descriptions of terms used or likely to be used in building and environmental acoustics standards. Definitions of terms are special-purpose definitions that are consistent with the standard definitions but are written to ensure that a specific building and environmental acoustics standard is properly understood and precisely interpreted. The primary focus of this document is upon terms, definitions and descriptions found within standards under the jurisdiction of ASTM Committee E33; however, terms, definitions and descriptions that are of general interest to the field of acoustics are also included.  
1.2 This building and environmental acoustics standard cannot be used to provide quantitative measures.  
1.3 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.  
1.4 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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ASTM
ASTM E492-22(Test Method)
Standard Test Method for Laboratory Measurement of Impact Sound Transmission Through Floor-Ceiling Assemblies Using the Tapping Machine

SIGNIFICANCE AND USE
5.1 The spectrum of the noise in the room below the test specimen is determined by the following:  
5.1.1 The size and the mechanical properties of the floor-ceiling assembly, such as its construction, surface, mounting or edge restraints, stiffness, or internal damping,  
5.1.2 The acoustical response of the room below,  
5.1.3 The placement of the object or device producing the impacts, and  
5.1.4 The nature of the actual impact itself.  
5.2 This test method is based on the use of a standardized tapping machine of the type specified in 8.1 placed in specific positions on the floor. This machine produces a continuous series of uniform impacts at a uniform rate on a test floor and generates in the receiving room broadband sound pressure levels that are sufficiently high to make measurements possible beneath most floor types even in the presence of background noise. The tapping machine itself, however, is not designed to simulate any one type of impact, such as produced by male or female footsteps.  
5.3 Because of its portable design, the tapping machine does not simulate the weight of a human walker. Therefore, the structural sounds, i.e., creaks or booms of a floor assembly caused by such footstep excitation is not reflected in the single number impact rating derived from test results obtained by this test method. The degree of correlation between the results of tapping machine tests in the laboratory and the subjective acceptance of floors under typical conditions of domestic impact excitation is uncertain. The correlation will depend on both the type of floor construction and the nature of the impact excitation in the building.  
5.4 In laboratories designed to satisfy the requirements of this test method, the intent is that only significant path for sound transmission between the rooms is through the test specimen. This is not generally the case in buildings where there are often many other paths for sounds— flanking sound transmission. Consequently so...
SCOPE
1.1 This test method covers the laboratory measurement of impact sound transmission of floor-ceiling assemblies using a standardized tapping machine. It is assumed that the test specimen constitutes the primary sound transmission path into a receiving room located directly below and that a good approximation to a diffuse sound field exists in this room.  
1.2 Measurements may be conducted on floor-ceiling assemblies of all kinds, including those with floating-floor or suspended ceiling elements, or both, and floor-ceiling assemblies surfaced with any type of floor-surfacing or floor-covering materials.  
1.3 This test method prescribes a uniform procedure for reporting laboratory test data, that is, the normalized one-third octave band sound pressure levels transmitted by the floor-ceiling assembly due to the tapping machine.  
1.4 Laboratory Accreditation—The requirements for accrediting a laboratory for performing this test method are given in Annex A2.  
1.5 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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 safety, health, and environmental 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.

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