1、Designation: C 1546 02 (Reapproved 2008)e1Standard Guide forInstallation of Gypsum Products in Concealed RadiantCeiling Heating Systems1This standard is issued under the fixed designation C 1546; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.e1NOTEThe units statement in new subsection 1.2 was added editorially in July 2008.1. Scope1.1 This guide
3、2provides information for trades installinggypsum products in conjunction with a concealed radiantceiling heating system constructed from thin sheet flexibleradiant heating panels, and for the installation of gypsumproducts after repair of existing concealed radiant ceilingheating systems constructe
4、d from heating cable or thin sheetflexible radiant heating panels.1.2 The values stated in inch-pound units are to be regardedas standard. No other units of measurement are included in thisstandard.1.3 This guide does not purport to address any aspect ofconcealed radiant heating system design or per
5、formance, and islimited to the proper installation of gypsum products specifiedfor use in a concealed radiant ceiling heating system.1.4 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to estab
6、lish appro-priate safety and health practices and determine the applica-bility of regulatory requirements prior to use.1.5 The text of this standard references notes and footnoteswhich provide explanatory material. These notes and footnotesshall not be considered as requirements of the standard.2. R
7、eferenced Documents2.1 ASTM Standards:3C 840 Specification for Application and Finishing of Gyp-sum BoardC 841 Specification for Installation of Interior Lathing andFurringC 842 Specification for Application of Interior GypsumPlaster3. Terminology3.1 Definitions:3.1.1 concealed radiant heating syste
8、m, na system thatoperates by heating the building materials that conceal the heatsource, which in turn transfer the heat into the heated area byradiant emission.3.1.2 facing, nthe finished surface layer through whichheat is transferred into a heated area.3.1.3 flexible radiant heating panel, na thin
9、 sheet heatingelement intended to produce heat when connected to anelectrical supply.3.1.4 furring, nspacer elements added to a building struc-ture to facilitate fastening of gypsum panel products.3.1.5 gypsum product, nbuilding material intended for usein radiant heated ceiling construction, contai
10、ning gypsum in itscomposition or construction.3.1.5.1 DiscussionThe gypsum products most often asso-ciated with radiant heating systems are gypsum board andgypsum plaster.3.1.6 heating cable, nan electrically insulated cable in-tended to produce heat when connected to an electrical supply.4. Signifi
11、cance and Use4.1 The purpose of this guide is to provide information togypsum product installers for the avoidance of hazards asso-ciated with the installation of gypsum products adjacent to, orsurrounding, electric heating components and conductors; andto avoid damage to gypsum products when used i
12、n conjunctionwith a concealed radiant heating system.4.2 The information given in this guide is applicable torepair of existing cable heating systems and to new construc-tion of radiant heating systems constructed from flexibleradiant heating panels.1This guide is under the jurisdiction of ASTM Comm
13、ittee C11 on Gypsum andRelated Building Materials and Systems and is the direct responsibility ofSubcommittee C11.03 on Specifications for the Application of Gypsum and OtherProducts in Assemblies.Current edition approved May 1, 2008. Published July 2008. Originally approvedin 2002. Last previous ed
14、ition approved in 2002 as C 1546 02.2The first edition of this guide replaced Appendix X.7 of SpecificationC 840 - 99a.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer
15、to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Summary of Guide5.1 Heating System Design:5.1.1 The heating system shall be designed to satisfy theheating needs of the buil
16、ding and to work effectively with allbuilding materials specified for use in the heating systeminstallation.NOTE 1The architect bears the responsibility of preparing and corre-lating complete plans and specifications, and to engage a professionalfamiliar with the heating system to design the system
17、to meet therequirements of 5.1.1 and 5.1.2.5.1.2 The heating system shall be designed so that a gypsumproduct is not exposed to a temperature more than 125F(52C) for periods of time sufficient to cause calcination.NOTE 2The foregoing requirement is intended to provide guidance toheating system desig
18、ners, consistent with Specification C 840,intheabsence of a comprehensive radiant heating system standard.5.2 Installation of Heating Equipment:5.2.1 Installation of radiant heating and related electricalequipment is governed by codes and regulations, and is theresponsibility of other trades.5.3 Gen
19、eral Installation Guidelines:5.3.1 The application of gypsum panel products under thisguide shall be performed in accordance with SpecificationC 840, except as herein modified.5.3.2 The radiant heating system shall be disconnected fromthe electric supply prior to the commencement of work.NOTE 3Disco
20、nnection from the electric supply is accomplished byswitching the heating system circuit breakers off, or removing fuses.Lowering a thermostat setting until the heating system turns off is notsupply disconnection.5.3.3 Unless the concealed radiant heating system is nolonger in use and has been perma
21、nently disconnected from theelectrical supply, or unless the previous facing has beenremoved, gypsum panel products or gypsum plaster shall notbe installed as a new facing on the heated area side of anexisting concealed radiant heating system.NOTE 4The increased thickness resulting from addition of
22、gypsumpanel products or gypsum plaster to an existing concealed radiant heatingsystem can impair heat transfer into the heated area, and may causeoverheating of the electrical heat source.5.3.4 All inspection and testing of the heating system shallbe completed before application of gypsum facing mat
23、erials.5.3.5 Care shall be taken in the installation of fasteners toavoid the penetration of heating equipment and electricalconductors.5.3.6 The radiant heating system shall not be operated toaccelerate the drying of joint compound or texture finishes.5.3.7 Follow the radiant heat-source manufactur
24、ers start-upand operating instructions when operating the radiant heatingsystem.5.4 Repair of Cable Heating Systems:5.4.1 Repair of heating cables is the responsibility of othertrades.5.4.2 The application of gypsum plaster shall conform toSpecification C 842 except as herein modified.5.4.3 Filler a
25、dded to gypsum plaster used to repair a heatingcable system, if any, shall be of sand or similar thermallyconductive material. Thermal insulating fillers such as ver-miculite or perlite, and foaming agents that impair heat transfershall not be used in plaster applied to radiant heating systems.5.4.4
26、 Application of metal lath shall conform to Specifica-tion C 841. Metal lath and fasteners installed for repair of acable heating system shall not contact heating cables.5.4.5 Complete embedding of the heating cable in plaster isnecessary after cable repair is completed.5.5 Flexible Radiant Heating
27、Panel Systems:5.5.1 Application of gypsum panel products shall complywith the requirements for System I or System II of Specifica-tion C 840, as applicable, based on the specified number oflayers; and with the requirements of System XII where floatinginterior angles are used.5.5.2 Application of gyp
28、sum panel products to steel framingor furring shall comply with System VIII of SpecificationC 840.5.5.3 The thickness of a gypsum panel product installed asa facing shall not exceed the thickness specified in the heatingsystem design specification.NOTE 5Installing facing thicker than specified can i
29、mpair heat trans-fer into the heated area, and may cause overheating of the electrical heatsource.5.5.4 Furring of any material or construction shall not beinstalled between gypsum panel product facing and flexibleradiant heating panels.NOTE 6The air gap produced by furring can impair heat transfer
30、intothe heated area, and may cause flexible radiant heating panels to overheat.5.5.5 All joints and heads of fasteners shall be finished inaccordance with Specification C 840, to the specified level offinish.NOTE 7When repairing an existing surface, the level of finish of therepair should be the sam
31、e as that of the original surface.5.5.6 Foil backed gypsum panel products shall not beinstalled in contact with thin sheet flexible radiant heatingpanels.5.6 Decoration:5.6.1 The heating system shall be turned off and allowed tocool before decorating.5.6.2 Decoration of finished work, including sizi
32、ng or seal-ing, shall not proceed until joint compound has dried.5.6.3 When texture finishes are used, such finishes must bethoroughly dry prior to heating system operation.6. Keywords6.1 furring; gypsum panel product; gypsum plaster; heatingcable; heating panel; lath; radiant heatC 1546 02 (2008)e1
33、2ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, ar
34、e entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standa
35、rdsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Commit
36、tee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).C 1546 02 (2008)e13
