1、Designation: E580/E580M 17Standard 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 E580/E580M; the number immediately following the designation indicates the y
2、earof 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 U.S. D
3、epartment of Defense.1. Scope*1.1 This practice covers the installation of suspended sys-tems for acoustical tile and lay-in panels and their additionalrequirements for two groups of buildings that are constructedto resist the effects of earthquake motions as defined by ASCE7 and the International B
4、uilding Code. These groupings are forSeismic Design Category C and Seismic Design Categories D,E and F.1.2 The authority having jurisdiction shall determine theapplicability of this practice.1.3 Test Methods E3090/E3090M, Specification C635, andPractice C636 cover suspension systems, their installat
5、ion, andtesting without special regard to seismic lateral restraint needs.They remain applicable and shall be followed when thispractice is specified.1.4 Ceilings less than or equal to 144 ft213.4 m2 andsurrounded by walls connected to the structure above areexempt from the requirements of this prac
6、tice.1.5 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 or prohibitany design or method of construction not prescribed in thispractice, provided that any such alternative has been su
7、bstan-tiated by verifiable engineering data or full-scale dynamictesting that is acceptable to the authority having jurisdiction.1.6 Ceiling areas of 1000 ft292.9 m2 or less shall beexempt from the lateral force bracing requirements of 5.2.8.1.7 Ceilings constructed of gypsum board which is screw or
8、nail attached to suspended members that support a ceiling onone level extending from wall to wall shall be exempt from therequirements of this practice.1.8 Free floating ceilings (those not attached directly to anystructural walls) supported by chains or cables from thestructure are not required to
9、satisfy the seismic force require-ments provided they meet the following requirements:1.8.1 The design load for such items shall equal 1.4 timesthe vertical operating weight.1.8.2 Seismic interaction effects shall be considered inaccordance with 5.7.1.8.3 The connection to the structure shall allow
10、a 360range of motion in the horizontal plane.1.9 The values stated in either inch-pound or SI units are tobe regarded as standard. Within the text, the SI units are shownin brackets. The values stated in each system are not exactequivalents; therefore, each system shall be used independentlyof the o
11、ther. Combining values from the two systems result innonconformance with the specification.1.10 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 establish appro-priate safety, health, and env
12、ironmental practices and deter-mine the applicability of regulatory limitations prior to use.1.11 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Stan
13、dards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2C635 Specification for the Manufacture, Performance, andTesting of Metal Suspension Systems for Acoustical Tileand Lay-in Panel CeilingsC636
14、 Practice for Installation of Metal Ceiling Suspension1This practice is under the jurisdiction of ASTM Committee E33 on Buildingand Environmental Acoustics and is the direct responsibility of SubcommitteeE33.04 on Application of Acoustical Materials and Systems.Current edition approved Sept. 1, 2017
15、. Published September 2017. Originallyapproved in 1976. Last previous edition approved in 2016 as E580/E580M 16.DOI: 10.1520/E0580_E0580M-17.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volu
16、me information, refer to the standards Document Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed
17、in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1Systems for Acoustical T
18、ile and Lay-In PanelsE3090/E3090M Test Methods for Strength Properties ofMetal Ceiling Suspension Systems2.2 Other Standards:ASCE 7 Minimum Design Loads for Buildings and OtherStructures3CISCA Recommendations for Direct-hung Acoustical Tileand Lay-in Ceilings, Seismic Zones 0-24CISCA Guidelines for
19、Seismic Restraint for Direct HungSuspended Ceiling Assemblies, Seismic Zones3&44International Building Code5NFPA 70 National Electric Code63. Significance and Use3.1 This practice is a prescriptive set of installation methodsto be used for suspended ceilings and is often used in lieu ofdesigning a s
20、eparate lateral restraint system. The authorityhaving jurisdiction shall determine the applicability of thispractice to local code requirements.3.2 This practice covers installation of suspended ceilingsystems and related components in areas that require resistanceto the effects of earthquake motion
21、s as defined by ASCE 7 andthe International Building Code.3.3 The practice is broken into two main sections. The firstsection covers areas with light to moderate earthquake poten-tial (Seismic Design Category C) while the second deals withsevere earthquake potential (Seismic Design Category D, E &F)
22、.3.4 This practice includes requirements from multiplesources including previous versions of this practice, CISCASeismic Recommendations for Direct-hungAcoustical Tile andLay-in Ceilings, Seismic Zones 0-2 and CISCA Guidelines forSeismic Restraint for Direct Hung Suspended CeilingAssemblies, Seismic
23、 Zones3&4,suspended ceiling require-ments from the International Building Code and ASCE 7. Thepurpose is to combine the requirements from these sources intoa single comprehensive document.4. Seismic Design Category CNOTE 1This section is intended to provide an unrestrained (free-floating) ceiling sy
24、stem that will accommodate the movement of thestructure during a seismic event.4.1 Suspension System Components:4.1.1 The recommendations in this section are for ceilingssystems with an average weight over the entire ceiling of 2.5lb/ft212 N/m2 or less. This average weight includes suspen-sion membe
25、rs, panels or tiles, light fixtures, supported flexiblesprinkler drops and air terminals. (See 4.4 and 4.5 for details onlights and mechanical services.) Ceilings with an averageweight over the entire ceiling greater than 2.5 lb/ft212 N/m2shall be installed as specified in 5.1 taking into account th
26、edesign lateral forces appropriate for Category C. Other devia-tions or variations shall be substantiated by verifiable engineer-ing data or full-scale dynamic testing.4.1.2 The main runners and cross runners of the ceilingsystem and their splices, intersection connectors, and expan-sion devices sha
27、ll be designed and constructed to carry a meanultimate test load of not less than 60 lb 27 kg in tension andin compression when tested per Test Methods E3090/E3090M.The tensile test shall allow for a 5 offset of the connection inany direction.4.2 Suspension System Application:4.2.1 Unless perimeter
28、members meet the structural loadcarrying requirements and have been approved as a structuralpart of the system, wall angles or channels shall be consideredas aesthetic closers and shall have no structural value assessedto themselves or their method of attachment to the walls.4.2.2 All perimeter clos
29、ure angles or channels shall providea support ledge of78 in. 22 mm or greater unless theperimeter ends of each cross runner and main runner shall beindependently supported as specified in 4.2.1.4.2.3 When a perimeter closure angle that provides less than78 in. 22 mm has been approved for use, the pe
30、rimeter endsof each cross runner and main runner shall be independentlysupported within 8 in. 200 mm from each wall or ceilingdiscontinuity (see Fig. 1).4.2.4 The terminal ends of suspension members shall have aminimum of38-in. 10-mm clearance from the wall as shownin Fig. 2. Reveal (shadow) edge wa
31、ll closures with theseclearances are shown in Fig. 3.4.2.5 Terminal ends of main runners and cross runners shallbe prevented from spreading.4.2.6 Permanent runner end attachment (that is, pop rivets)for grid alignment purposes shall not be permitted.4.2.7 All ceiling penetrations (columns, sprinkler
32、s, etc.) andindependently supported fixtures or services shall have aminimum of38-in. 10-mm clearance on all sides by usingsuitable escutcheons or perimeter closure details.4.3 Suspension Wire Application:4.3.1 Suspension wires that are a minimum of No. 12 gauge2.70 mm galvanized, soft-annealed, mil
33、d steel wire shall bespaced at 4 ft 1200 mm on center along each main runner,unless engineering calculations justifying increased spacing areprovided.4.3.2 Each vertical wire shall be attached to the ceilingsuspension member and to the support above such that the wireloops shall be tightly wrapped a
34、nd sharply bent to prevent anyvertical movement or rotation of the member within the loops.The wire must be wrapped around itself a minimum of threefull turns (360 each) within a 3-in. 75-mm length. Connec-tion devices to the supporting construction shall be capable ofcarrying not less than a 90-lb
35、40-kg allowable load whentested per Test Methods E3090/E3090M.4.3.3 Suspension wires shall not hang more than one in sixout of plumb unless countersloping wires are provided.4.3.4 Wires shall not attach to or bend around interferingmaterial or equipment. A trapeze or equivalent device shall beused w
36、here obstructions preclude direct suspension. Trapeze3Available from American Society of Civil Engineers (ASCE), 1801 AlexanderBell Drive, Reston, VA 20191 or www.pubs.asce.org.4Available from Ceiling & Interior Systems Construction Association (CISCA),1500 Lincoln Hwy, Suite 202, St. Charles, IL 60
37、174.5Available from International Code Council (ICC), 4051 West Flossmoor Road,Country Club Hills, IL 60478-5795.6Available from National Fire Prevention association (NFPA), 1 BatterymarchPark, Quincy, MA 02269-9101.E580/E580M 172suspensions shall be sized to resist the dead load and lateralforces a
38、ppropriate for Category C.4.4 Light Fixture Application:4.4.1 All lighting fixtures shall be positively attached to thesuspended ceiling system by mechanical means as specified inthe National Electrical Code unless independently supported.The attachment device shall have the capacity of supporting10
39、0 % of the lighting fixture weight acting in any direction. Aminimum of two attachment devices are required for eachfixture.4.4.2 Surface-mounted lighting fixtures shall be attached tothe ceiling system with a positive clamping device thatcompletely surround the supporting members. Safety wiresshall
40、 be attached between the clamping device and the adjacentceiling hanger or to the structure above. In no case shall thefixture exceed the design carrying capacity of the supportingmembers.4.4.3 Lighting fixtures weighing less than or equal to 10 lb5 kg shall have one, No. 12-gauge 2.70 mm safety wir
41、econnected from the fixture housing (not the detachable endFIG. 1 Category C Treatment of Cross Runners and Main Runners at Terminal Ends When Support Ledge of Perimeter Closure is LessThan Minimum78 in. 22 mmFIG. 2 Category C Treatment of Cross Runners, Main Runners, and Wall Closures at Terminal E
42、ndsE580/E580M 173plates) to the structure above. It is not necessary for thesesafety wires to be taut. Supplementary hanger wires of crosstees supporting light fixtures shall not be required.4.4.4 Lighting fixtures weighing greater than 10 lbs 5kgbut less than or equal to 56 lb 25 kg shall have two
43、No.12-gauge 2.70 mm safety wires connected from the fixturehousing (not the detachable end plates) to the structure abovethat act as safety wires. It is not necessary for these safety wiresto be taut.4.4.5 Lighting fixtures weighing greater than 56 lb 25 kgor more shall be supported directly from th
44、e structure above byapproved hangers.4.4.6 Pendant-hung lighting fixtures shall be supporteddirectly from the structure above using no less than No.9-gauge 3.80 mm wire or an approved alternate support. Theceiling suspension system shall not provide any direct support.4.4.7 Rigid conduit is not perm
45、itted for attachment of thefixtures.4.5 Services within the Ceiling:4.5.1 Flexible sprinkler hose fittings, ceiling mounted airterminals or other services weighing less than or equal to 20 lb9 kg shall be positively attached to the ceiling suspensionmain runners or cross runners that have the same c
46、arryingcapacity as the main runners.4.5.2 Flexible sprinkler hose fittings, air terminals or otherservices weighing more than 20 lb 9 kg but less than or equalto 56 lb 25 kg shall have, in addition to the requirements in4.5.1, two No. 12-gauge 2.70 mm hanger wires connectedfrom the terminal or servi
47、ce to the ceiling system hangers or tothe structure above that act as safety wires. It is not necessaryfor these wires to be taut.4.5.3 Flexible sprinkler hose fittings, air terminals or otherservices weighing more than 56 lb 25 kg shall be supporteddirectly from the structure above by approved hang
48、ers.4.6 Partition Application to Suspended Ceilings:4.6.1 The ceiling system shall not provide lateral support forwalls or partitions. Walls or partitions shall only be attached tothe ceiling suspension provided they allow the ceiling mem-brane to move laterally to accommodate the required clearance
49、as specified in 4.2.4.5. Seismic Design Category D,E&FNOTE 2The objective of this section is to provide a restrained ceilingthrough either connection to the perimeter wall, or through bracing eitherrigid or non-rigid. The key to good seismic performance of this type ofceiling is that the width of the closure angle around the perimeters areadequate to accommodate ceiling motion and that penetrations, such ascolumns and piping, have adequate clearance to avoid concentratingrestraining loads on the ceiling
