ASTM C1546-02(2014)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C1546 − 02 (Reapproved 2014)
Standard Guide for
Installation of Gypsum Products in Concealed Radiant
Ceiling Heating Systems
This standard is issued under the fixed designation C1546; 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 C842 Specification forApplication of Interior Gypsum Plas-
2 ter
1.1 This guide provides information for trades installing
gypsum products in conjunction with a concealed radiant
3. Terminology
ceiling heating system constructed from thin sheet flexible
radiant heating panels, and for the installation of gypsum 3.1 Definitions:
products after repair of existing concealed radiant ceiling
3.1.1 concealed radiant heating system, n—a system that
heating systems constructed from heating cable or thin sheet
operates by heating the building materials that conceal the heat
flexible radiant heating panels.
source, which in turn transfer the heat into the heated area by
radiant emission.
1.2 The values stated in inch-pound units are to be regarded
as standard. No other units of measurement are included in this
3.1.2 facing, n—the finished surface layer through which
standard.
heat is transferred into a heated area.
1.3 This guide does not purport to address any aspect of
3.1.3 flexible radiant heating panel, n—a thin sheet heating
concealedradiantheatingsystemdesignorperformance,andis
element intended to produce heat when connected to an
limited to the proper installation of gypsum products specified
electrical supply.
for use in a concealed radiant ceiling heating system.
3.1.4 furring, n—spacer elements added to a building struc-
1.4 This standard does not purport to address all of the
ture to facilitate fastening of gypsum panel products.
safety concerns, if any, associated with its use. It is the
3.1.5 gypsum product, n—building material intended for use
responsibility of the user of this standard to establish appro-
in radiant heated ceiling construction, containing gypsum in its
priate safety and health practices and determine the applica-
composition or construction.
bility of regulatory requirements prior to use.
3.1.5.1 Discussion—The gypsum products most often asso-
1.5 The text of this standard references notes and footnotes
ciated with radiant heating systems are gypsum board and
which provide explanatory material. These notes and footnotes
gypsum plaster.
shall not be considered as requirements of the standard.
3.1.6 heating cable, n—an electrically insulated cable in-
2. Referenced Documents
tended to produce heat when connected to an electrical supply.
2.1 ASTM Standards:
C840 SpecificationforApplicationandFinishingofGypsum
4. Significance and Use
Board
4.1 The purpose of this guide is to provide information to
C841 Specification for Installation of Interior Lathing and
gypsum product installers for the avoidance of hazards asso-
Furring
ciated with the installation of gypsum products adjacent to, or
surrounding, electric heating components and conductors; and
This guide is under the jurisdiction of ASTM Committee C11 on Gypsum and
to avoid damage to gypsum products when used in conjunction
Related Building Materials and Systems and is the direct responsibility of
with a concealed radiant heating system.
Subcommittee C11.03 on Specifications for the Application of Gypsum and Other
Products in Assemblies.
4.2 The information given in this guide is applicable to
Current edition approved April 1, 2014. Published April 2014. Originally
ε1
approved in 2002. Last previous edition approved in 2008 as C1546 – 02 (2008) . repair of existing cable heating systems and to new construc-
DOI: 10.1520/C1546-02R14.
tion of radiant heating systems constructed from flexible
The first edition of this guide replaced Appendix X.7 of Specification
radiant heating panels.
C840 - 99a.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5. Summary of Guide
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. 5.1 Heating System Design:
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C1546 − 02 (2014)
5.1.1 The heating system shall be designed to satisfy the 5.4.2 The application of gypsum plaster shall conform to
heating needs of the building and to work effectively with all Specification C842 except as herein modified.
building materials specified for use in the heating system 5.4.3 Filler added to gypsum plaster used to repair a heating
installation. cable system, if any, shall be of sand or similar thermally
conductive material. Thermal insulating fillers such as ver-
NOTE 1—The architect bears the responsibility of preparing and
miculite or perlite, and foaming agents that impair heat transfer
correlatingcompleteplansandspecifications,andtoengageaprofessional
shall not be used in plaster applied to radiant heating systems.
familiar with the heating system to design the system to meet the
requirements of 5.1.1 and 5.1.2.
5.4.4 Application of metal lath shall conform to Specifica-
tion C841. Metal lath and fasteners installed for repair of a
5.1.2 Theheatingsystemshallbedesignedsothatagypsum
cable heating system shall not conta
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