1、Designation: E 580/E 580M 06Standard Practice forApplication of Ceiling Suspension Systems for AcousticalTile and Lay-in Panels in Areas Requiring Seismic Restraint1This standard is issued under the fixed designation E 580/E 580M; the number immediately following the designation indicates the yearof
2、 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
3、 of Defense.1. Scope1.1 This practice covers acoustical ceiling suspension sys-tems and their additional requirements for application in areassubject to light to moderate seismic disturbance such asUniform Building Code Seismic Zone 2, the BOCA BasicNational Building Code where Avis less than 0.20 b
4、ut greaterthan 0.10, and the Standard Building Code (SBC) where Avisless than 0.20 but greater than 0.05. This practice also coversareas subject to moderate to severe seismic disturbance such asUniform Building Code Seismic Zones 3 and 4, the BOCABasic National Building Code where Avis greater than
5、0.20,and the SBC where Avis greater than 0.20. The application ofthis practice is to be determined by local authorities. Currentseismic maps published by recognized authorities such as thosepreviously mentioned, should be consulted. Related materialsuch as Open File 82-10332and MS-812 Seismicity Map
6、3mayalso be consulted.1.2 Specification C 635 and Practice C 636 cover suspen-sion systems and their application without special regard toseismic restraint needs. They remain applicable and should befollowed when this practice is specified.1.3 This practice is not intended to stifle research anddeve
7、lopment of new products or methods which may simplifythis specified application method. A variation, however, mustbe substantiated by verifiable engineering data.1.4 A ceiling area of 144 ft213m2 or less, surrounded bywalls that connect directly to the structure above shall beexempt from this practi
8、ce.1.5 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 and health practices and determine the applica-bility of regulatory limitations prior to use.1.6 The valu
9、es 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 must be used indepen-dently of the other. Combining values from the two systemsmay result in
10、 nonconformance with the specification.2. Referenced Documents2.1 ASTM Standards:4C 635 Specification for the Manufacture, Performance, andTesting of Metal Suspension Systems for Acoustical Tileand Lay-in Panel CeilingsC 636 Practice for Installation of Metal Ceiling SuspensionSystems for Acoustical
11、 Tile and Lay-In Panels2.2 Other Standards:National Electric Code, 19935Uniform Building Code, 19946BOCA Basic Building Code, 199373. Areas Subject to Light to Moderate SeismicDisturbance3.1 Suspension System Components:3.1.1 The actual average weight of the ceiling system,including grid, panel or t
12、ile, light fixtures, and air terminalsmust be 2.5 lb/ft212 N/m2 or less. All other services must besupported independently from the ceiling system. For ceilingsthat have an average weight greater than 2.5 lb/ft212 N/m2,the ceiling may be installed as specified in Section 4. Otherdeviations or variat
13、ions must be substantiated by verifiableengineering data.3.1.2 The main runners and cross runners of the ceilingsystem and their splices, intersection connectors, and expan-sion devices shall be designed and constructed to carry a mean1This practice is under the jurisdiction of ASTM Committee E33 on
14、 Environ-mental Acoustics and is the direct responsibility of Subcommittee E33.04 onApplication.Current edition approved July 15, 2006. Published July 2006. Originallyapproved in 1976. Last previous edition approved in 2002 as E 580 02e1.2Open File 82-1033 Probabilistic Estimate of Maximum Accelerat
15、ion in Rockpublished by United States Geological Survey.3MS-8125 Seismicity Map of the Conterminous United States and AdjacentAreas, 19651974 published by United States Geological Survey.4For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at servicea
16、stm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.5Available from National Fire Protection Association, Batterymarch Park,Quincy, MA 02269.6Available from International Conference of Building Officials, 5360 S. Work-man Mill
17、 Rd., Whittier, CA 90601.7Available from Building Officials and Code Administrators International, 4051W. Flossmoor Rd., Country Club Hills, IL 60477.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ultimate test load of not less than
18、 60 lb 27 kg in tension witha 5 misalignment of the members in any direction and incompression. Instead of a 5 misalignment, the load may beapplied with a 1-in. 25mm eccentricity on a sample not morethan 24 in. 600 mm long on each side of the splice.3.1.3 Evaluation of test results shall be made on
19、the basis ofthe mean values resulting from tests of not fewer than threeidentical specimens, provided the deviation of any individualtest result from the mean value does not exceed 610 %.3.2 Suspension System Application:3.2.1 All perimeter closure angles or channels shall providea support ledge of
20、approximately78 in. 22 mm or greater.3.2.2 The end of a grid member (or tile) that rests on theledge or molding shall have at least38-in. 10 mm clearancefrom an edge or wall as shown in Fig. 1. Reveal (shadow) edgewall closures should accommodate these clearances as shownin Fig. 2. Ends of main runn
21、ers and cross members shall be tiedtogether to prevent their spreading.3.2.3 Direct concealed suspended ceiling systems shall havepositively connected stabilizer struts or mechanically con-nected cross runner at a maximum spacing of 60 in. 1500 mmperpendicular to the main runners (see Fig. 3). Stabi
22、lizer barsshall occur within 24 in. 600 mm of each wall.3.2.4 Suspension Wire Application:3.2.4.1 Suspension wires of soft, annealed, galvanized steelwire shall not be smaller than No. 12 gage 2.70 mm spacedat 4 ft 1200 mm on center or No. 10 gage 3.40 mm at 5 ft1500 mm on center along each main run
23、ner unless calcula-tions justifying the increased spacing are provided.3.2.4.2 Each vertical wire shall be attached to the ceilingsuspension member and to the support above with a minimumof three turns with a connection device capable of carrying notless than a 100-lb 45 kg allowable load.3.2.4.3 Su
24、spension wires shall not hang more than one in sixout of plumb unless countersloping wires are provided.3.2.4.4 Wires shall not attach to or bend around interferingmaterial or equipment. A trapeze or equivalent device shall beused where obstructions preclude direct suspension. Trapezesuspensions sha
25、ll be a minimum of back-to-back 114-in. 32mm cold-rolled channels for spans exceeding 48 in. 1200mm.3.2.4.5 For perimeter closure angles that provide a supportledge of less than78 in. 22 mm, the terminal ends of eachcross runner or main runner shall be independently supportedwithin 8 in. 200 mm from
26、 each wall or ceiling discontinuityas shown in Fig. 3. This support may be a No. 12-gage 2.70mm hanger wire or other support that prevents the grid fromfalling. This wire does not need to be vertical but should nothave a slope greater than one in six out of plumb. A38-in. 10mm grid end clearance fro
27、m a wall should be maintained.3.2.5 The intent of the preceding provisions is to provide anunrestrained ceiling system that will accommodate the move-ment of the structure during a seismic event. The objective isto have a free-floating ceiling. Nothing may be installed whichprevents the ceiling syst
28、em from moving. All ceiling penetra-tions (columns, sprinklers, etc.) and independently supportedfixtures or services are to be considered as perimeter closuresthat also must allow the noted clearances by using suitableescutcheons or closure details.3.2.6 For essential facilities, perimeter support
29、of each crossrunner and main runner, as mentioned in 3.2.4.5, is required. Inaddition, a12-in. 12 mm grid end clearance from a wallshould be maintained.3.3 Light Fixture Application:3.3.1 All lighting fixtures shall be positively attached to thesuspended ceiling system by mechanical means as specifi
30、ed inthe National Electrical Code, Section 410-16(c) unless inde-pendently supported. The attachment device, a minimum oftwo per fixture, shall have a capacity of 100 % of the lightingfixture weight acting in any direction.3.3.2 Surface-mounted lighting fixtures shall be attached tothe ceiling syste
31、m with positive clamping devices that com-pletely surround the supporting members. Safety wires shall beattached between the clamping device and the adjacent ceilinghanger or to the structure above. In no case shall the fixtureexceed the design carrying capacity of the supporting mem-bers.3.3.3 Pend
32、ant-hung lighting fixtures shall be supporteddirectly from the structure above using No. 9-gage 3.80 mmwire or an approved alternate support without using the ceilingsuspension system for direct support.FIG. 1 Light to Moderate Treatment of Cross Runners, Main Runners, and Wall Closures at Terminal
33、EndsE 580/E 580M 062FIG. 2 Light to Moderate Treatment of Cross Runners and Main Runners at Terminal Ends When Using Reveal (Shadow) Edge WallClosuresE 580/E 580M 0633.3.4 Lighting fixtures weighing less than 56 lb 25 kg shallhave, in addition to the requirements outlined in 3.3, two No.12-gage 2.70
34、 mm hangers connected from the fixture housingto the structure above. These wires may be slack.3.3.5 Lighting fixtures weighing 56 lb 25 kg or more shallbe supported directly from the structure above by approvedhangers.3.3.6 Rigid conduit is not permitted for attachment of thefixtures.3.4 Services W
35、ithin the Ceiling:3.4.1 Ceiling mounted air terminals or services weighingless than 20 lb 9 kg shall be positively attached to the ceilingsuspension main runners or cross runners.3.4.2 Air terminals or services weighing more than 20 lb 9kg but not more than 56 lb 25 kg shall have, in addition tothe
36、requirements in 3.4.1, two No. 12-gage 2.70 mm hangersconnected from the terminal or service to the ceiling systemhangers or to the structure above. These wires may be slack.FIG. 3 Light to Moderate Treatment of Cross Runners and Main Runners at Terminal Ends When Support Ledge of Perimeter Closure
37、isLess Than Minimum78 in. 22 mmE 580/E 580M 0643.4.3 Air terminals or services weighing more than 56 lb 25kg shall be supported directly from the structure above byapproved hangers.3.5 Partition Application to Suspended Ceilings:3.5.1 The ceiling system cannot be used to provide lateralsupport for w
38、alls or partitions. Walls or partitions may beattached to the ceiling grid provided they allow the ceilingmembrane to move laterally to accommodate the requiredclearance as specified in Section 4.4. Areas Subject to Severe Seismic Disturbance4.1 Suspension System Components:4.1.1 Only intermediate a
39、nd heavy-duty main tees, as de-fined in Specification C 635, may be used, except where noloads other than ceiling panels or tiles less than 1.25 lb/ft26N/m2 are supported by the members.4.1.2 The main runners and cross runners of the ceilingsystem and their splices, intersection connectors, and expa
40、n-sion devices shall be designed and constructed to carry a meanultimate test load of not less than 180 lb 80 kg or twice theactual load, whichever is greater, in tension with a 5 misalign-ment of the members in any direction and in compression.Instead of a 5 misalignment, the load may be applied wi
41、th a1-in. 25mm eccentricity on a sample not more than 24 in.600 mm long on each side of the splice. The connectors atsplices and intersections all shall be of the mechanical inter-locking type.4.1.3 Evaluation of test results shall be made on the basis ofthe mean values resulting from test of not fe
42、wer than threeidentical specimens, provided the deviation of any individualtest result from the mean value does not exceed 610 %.4.2 Suspension System Application:4.2.1 Unless perimeter members are a structural part of theapproved system, wall angles or channels shall be consideredas aesthetic close
43、rs and shall have no structural value assessedto themselves or their method of attachment to the walls.4.2.2 Main runners and cross runners may be attached to theperimeter members on two adjacent walls.Aclearance of12 in.12 mm shall be maintained between the main and crossrunner ends and the perimet
44、er members on the two remainingwalls (see Fig. 4, C-C). Ends of main runners and crossmembers shall be tied together to prevent their spreading.4.2.3 Direct concealed suspended ceiling systems shall havepositively connected stabilizer struts or mechanically con-nected cross runners at a maximum spac
45、ing of 60 in. 1500mm perpendicular to the main runners. Stabilizer bars shalloccur within 24 in. 600 mm of each wall.4.2.4 Suspension Wire Application (see Fig. 4):4.2.4.1 Suspension wires of soft, annealed, galvanized steelwire shall not be smaller than No. 12 gage 2.70 mm spacedat 4 ft 1200 mm on
46、center or No. 10 gage 3.40 mm at 5 ft1500 mm on center along each main runner unless calcula-tions justifying the increased spacing are provided.4.2.4.2 Each vertical wire shall be attached to the ceilingsuspension member and to the support above with a minimumof three turns with a connection device
47、 capable of carrying notless than a 100-lb 45 kg allowable load.4.2.4.3 Suspension wires shall not hang more than one in sixout of plumb unless countersloping wires are provided.4.2.4.4 Wires shall not attach to or bend around interferingmaterial or equipment. A trapeze or equivalent device shall be
48、used where obstructions preclude direct suspension. Trapezesuspensions shall be a minimum of back-to-back 114-in. 32mm cold-rolled channels for spans exceeding 48 in. 1200mm.4.2.4.5 Where substantiating design calculations are notprovided, horizontal restraints shall be effected by four No.12-gage 2
49、.70 mm wires secured to the main runner within 2in. 50 mm of the cross runner intersection and splayed 90from each other at an angle not exceeding 45 from the planeof the ceiling. A strut fastened to the main runner shall beextended to and fastened to the structural members supportingthe roof or floor above. The strut shall be adequate to resist thevertical component induced by the bracing wires. Thesehorizontal restraint points shall be placed 12 ft 3600 mm oncenter
