1、Designation: E 580/E 580M 08a1Standard Practice forInstallation of Ceiling Suspension Systems for AcousticalTile and Lay-in Panels in Areas Subject to EarthquakeGround Motions1This standard is issued under the fixed designation E 580/E 580M; the number immediately following the designation indicates
2、 the yearof 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.This standard has been approved for use by agencies of the
3、Department of Defense.1NOTEFig. 4 was editorially updated in March 2009.1. Scope1.1 This practice covers installation of suspended ceilingsystems and their additional requirements for two groups ofbuildings that are constructed to resist the effects of earthquakemotions as defined by ASCE 7 and the
4、International BuildingCode. These groupings are for Seismic Design Category C andSeismic Design Categories D, E and F.1.2 The authority having jurisdiction shall determine theapplicability of this practice.1.3 Specification C 635 and Practice C 636 cover suspen-sion systems and their installation wi
5、thout special regard toseismic lateral restraint needs. They remain applicable andshall be followed when this practice is specified.1.4 This practice is not intended to stifle research anddevelopment of new products or methods. This practice is notintended to prevent the installation of any material
6、 or prohibitany design or method of construction not prescribed in thispractice, provided that any such alternative has been substan-tiated by verifiable engineering data or full-scale dynamictesting that is acceptable to the authority having jurisdiction.1.5 Ceiling areas of 1000 ft292.9 m2 or less
7、 shall beexempt from the lateral force bracing requirements of 5.2.8.1.6 Ceilings constructed of gypsum board which is screw ornail attached to suspended members that support a ceiling onone level extending from wall to wall shall be exempt from thelateral force bracing requirements of 5.2.8.1.7 Fre
8、e floating ceilings (those not attached directly to anystructural walls) supported by chains or cables from thestructure are not required to satisfy the seismic force require-ments provided they meet the following requirements:1.7.1 The design load for such items shall equal 1.4 timesthe vertical op
9、erating weight.1.7.2 Seismic interaction effects shall be considered inaccordance with 5.7.1.7.3 The connection to the structure shall allow a 360range of motion in the horizontal plane.1.8 The values stated in either inch-pound or SI units are tobe regarded as standard. Within the text, the SI unit
10、s are shownin brackets. The values stated in each system are not exactequivalents; therefore, each system shall be used independentlyof the other. Combining values from the two systems result innonconformance with the specification.1.9 This standard does not purport to address all of thesafety conce
11、rns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2C 635 Specification for the Manufacture,
12、 Performance, andTesting of Metal Suspension Systems for Acoustical Tileand Lay-in Panel CeilingsC 636 Practice for Installation of Metal Ceiling SuspensionSystems for Acoustical Tile and Lay-In Panels2.2 Other Standards:ASCE 7 Minimum Design Loads for Buildings and OtherStructures3CISCA Recommendat
13、ions for Direct-hung Acoustical Tileand Lay-in Ceilings, Seismic Zones 0-24CISCA Guidelines for Seismic Restraint for Direct HungSuspended Ceiling Assemblies, Seismic Zones3 earthquake; seismic; seismic re-straint; suspended ceilingAPPENDIX(Nonmandatory Information)X1. COMMENTARYX1.1 Recommendations
14、 in previous versions of this prac-tice were based in part on testing done in the 1980s. This,coupled with general observations from the earthquake proneareas in California have lead to the original practice.X1.2 Actual earthquake experience (most notablyNorthridge and Loma Prieta earthquakes) has s
15、hown that threemain things are critical for good performance of ceilingsystems during earthquakes which are:X1.2.1 Independent safety wires on light fixtures to preventdropout,X1.2.2 Minimum strength requirements for splices andcross/runner/main runner intersections, andX1.2.3 Spreader bars and inde
16、pendent support of suspen-sion member terminal ends at wall closures which preventpanel dropout if the perimeter suspension terminal end slips offof the closure support ledge.FIG. 5 Supplemental Hanger Wires at Light Fixtures (continued)E 580/E 580M 08a19X1.3 These observations have lead to the requ
17、irement forsafety wires on light fixtures and minimum connectionstrengths in Practice E 580/E 580M. This also led to therequirement for 2-in. 50 mm perimeter support ledger and therequirement for independent support of terminal ends ofsuspension members.X1.4 Advent of International Building Code has
18、 raised theawareness of seismic installation requirements in areas withinthe United States where these requirements traditionally werenot a concern.X1.5 The introduction of non-traditional ceiling made ofwood and metal, as well as ceilings that do not use traditionaltee bar suspension systems, has l
19、ead to a need for an expansionof the prescriptive installation requirements. There has beenalso a general concern over the interaction of the ceiling systemwith HVAC components, lights and sprinklers. This coupledwith the coming of next generation of performance basedseismic codes has lead to new in
20、terest in clear and conciserequirements for installation of ceiling systems. The result isthis current rewrite of this practice.ASTM 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
21、 expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are 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 r
22、evised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you
23、 may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee 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).E 580/E 580M 08a110
