Seismic Suspension System Solutions - CertainTeed

1 Seismic Suspension System SolutionsTechnical GuideCertainTeed Ceilings | Acoustic Ceilings & Suspension SystemsPURPOSE OF Seismic INSTALLATION REQUIREMENTS FOR SUSPENDED CEILINGS Provide a Suspension System strong enough to resist lateral forces imposed upon it without failing Prevent panels from falling during a Seismic event Limit structural damage to ceiling grid during a Seismic event Provide life safety to building occupants during Seismic eventsADOPTION OF THE INTERNATIONAL BUILDING CODEC urrently all 50 states as well as Washington, , Guam, Northern Marianas Territories, Puerto Rico, the Virgin Islands, and all Federal Agencies use the International Building Code (IBC).

2 CODE ENFORCEMENTThe building code presents minimum design/performance requirements and in some instances prescriptive guidance. The code also sets forth limitations and conditions of use. It is important to know that while the building code establishes the requirements, the code official has the power to enforce its provisions. The code official also has the latitude to allow materials and methods of construction that are not addressed in the code. As with all code issues, the local authority having jurisdiction (AHJ) is the final arbiter for application of the IBC at that Support | 1-800-233-8990 | Seismic DESIGN CATEGORIES ARE DETERMINEDThe Seismic design category A-F must be specified by a professional engineer or registered architect on the project drawings.

3 The project requirements, which include the Seismic design category, can be found in Section 1 of the specification and on the first page of the structural drawings. Jurisdictions using the 2009 IBC follow ASCE 7-05, Section and the appropriate CISCA recommendations/guidelines. International Building Code allows two paths to determine Seismic Design category IBC Section 1613 or ASCE 7 Section The IBC states that a Seismic Design Category must be established for each construction project based on: Anticipated ground motion Soil type in a specified geographic area Occupancy categoryThese factors are used to evaluate and establish a Seismic Design Category of A, B, C, D, E or F.

4 The installation of ceilings can be divided into three tiers of increasing requirements: Categories A & B are installed to meet requirements established in ASTM C636. There are no additional Seismic requirements. Category C projects must follow ASTM C636 and ASTM E580 (CISCA Recommendations for zones 0-2 can be used if 2009 IBC governs) Categories D, E & F must follow ASTM C636, ASCE 7 Section and ASTM E580 (CISCA Guidelines for zones 3-4 can be used if 2009 IBC governs)Jurisdictions using the 2012 and 2015 IBC follow ASCE 7-10, Section and ASTM E580 (which has replaced the CISCA documents).p3 Technical Support | 1-800-233-8990 | CONVENTIONAL Seismic INSTALLATION REQUIREMENTS SUMMARYT echnical Support | 1-800-233-8990 | DESIGN CATEGORYC ategory C per 2009 IBCC ategories D, E, F per 2009 IBCC ategory C per 2012 & 2015 IBCC ategories D,E,F per 2012 & 2015 IBCREFERENCESC orresponding American Society of Civil Engineers (ASCE)

5 Reference StandardASCE 7-05 ASCE 7-05 ASCE 7-10 ASCE 7-10 Corresponding CISCA or ASTM Reference StandardCISCA Zones 0-21 CISCA Zones 3-42 ASTM E 580 ASTM E 580 LIMITATIONSW eight psf4 psf4 psfEXEMPTIONSC eiling areas less than 144 ft2 ExemptExemptExemptExemptPlaster and lath ceilingsExemptExemptNot exempt, detailsmust be specifiedNot exempt, detailsmust be specifiedDrywall ceilings (screw-attached)ExemptExemptExemptExempt BASIC INSTALLATIONREQUIREMENTM inimum strength of vertical wire connection device to the structureNot required100 required90 hanger wire 12-gauge @ 4 in 6 max plumb of verticalhanger wiresRequiredRequiredRequiredRequiredRig id bracing for ceiling plane elevation changesNot requiredRequiredNot requiredRequiredPartition attachmentAllowed only if ceiling is allowed to move laterallyBracing independent of ceiling splay bracingAllowed only if ceiling is allowed to move laterallyBracing independent of ceiling splay bracingGRIDREQUIREMENTSMain runner classifications3 Intermediate or Heavy

6 DutyHeavy DutyIntermediate or Heavy DutyHeavy DutyMinimum main runner and cross tee connection strength60 vertical hanger wires not more than 8" from wallNot required unless angle is less than 7/8"RequiredNot required unless angle is less than 7/8"RequiredGrid end/wall detailsMinimum 3/8" clearance on all 4 wallsTwo adjacent walls must be tight and two adjacent walls must have a minimum 3/4" clearanceMinimum 3/8" clearance on all 4 wallsTwo adjacent walls must be tight and two adjacent walls must have a minimum 3/4" clearancePerimeter closure (angle trim) widthMinimum 7/8"(or use perimeter wires)Minimum 2"Minimum 7/8" (or use perimeter wires)Minimum 2"Perimeter tees ends prevented from spreading (Stabilizer Bars)RequiredRequiredRequiredRequiredLAT ERAL BRACINGREQUIREMENTSH orizontal restraint (splay wires or rigid bracing) within 2" of intersection and splayed 90 apart at 45 an-gles (areas over 1,000 ft2)Not requiredRequiredNot requiredRequiredCompression posts (struts) 12' in both directions, starting 6' from wallsNot requiredRequiredNot requiredRequiredSplay bracing connection strengthNot requiredRequired(200 lbs.)

7 Not requiredRequired(250 lbs.) Seismic separation jointNot requiredRequired for areas larger than 2,500 ft2 (or full height partition).Not requiredRequired for areas larger than 2,500 ft2 (or full height partition). The ratio of the length to width must be less than or equal to 4:1p5 IBC CONVENTIONAL Seismic INSTALLATION REQUIREMENTS SUMMARYT echnical Support | 1-800-233-8990 | DESIGN CATEGORYC ategory C per 2009 IBCC ategories D, E, F per 2009 IBCC ategory C per 2012 & 2015 IBCC ategories D, E, F per 2012 & 2015 IBCLIGHT FIXTURE ATTACHMENTL ight fixture (all types) mechanically attached to grid is required per NEC 410-16 (two per fixture unless independently supported)

8 RequiredRequiredRequiredRequiredSurface- mounted fixtures attached to gridNot requiredMust be attached to ceiling with positive clamping devices that are connected to the structure or vertical hanger wiresMust be attached to ceiling with positive clamping devices that are connected to the structure or vertical hanger wiresMust be attached to ceiling with positive clamping devices that are connected to the structure or vertical hanger wiresPendant-hung fixtures directly supported from structure with 9-gauge wire (or approved alternate)Not requiredRequiredRequiredRequiredRigid lay-in or can light fixtures< 10 lbs.

9 - one wire to structure (may be slack)RequiredRequiredRequiredRequired10 to 56 lbs. - two wires from fixture to structure (may be slack)RequiredRequiredRequiredRequired> 56 lbs. - supported directly to structure by approved hangersRequiredRequiredRequiredRequiredR igid conduit attached to light fixturesForbiddenPermittedForbiddenPermi ttedSERVICES WITHIN THE CEILINGAir Terminals< 20 lbs. - positively attached to gridNot requiredRequiredRequiredRequired20 to 56 lbs. - positively attached to grid and two 12-gauge wires to structure (may be slack)Not requiredRequiredRequiredRequired> 56 lbs. - directly supported to the structureNot requiredRequiredRequiredRequiredSprinkle r heads and otherpenetration clearanceMinimum 3/8" on all sidesMinimum 2" diameter opening or a swing jointMinimum 3/8" on all sidesMinimum 2" diameter opening or flexible sprinkler hose fittingCable trays and electrical conduit independently supported and bracedNot requiredNot requiredNot requiredRequiredNOTES:1.

10 Recommendations for Direct-Hung Acoustical Tile and Lay-In Panel Ceilings - CISCA 20042. Guidelines for Seismic Restraint for Direct Hung Suspended Ceilings - CISCA 20043. Per ASTM C635 Consult your local authority having jurisdiction for information specific to your that some installations do not fall under the jurisdiction of the IBC in many states, such as schools and Support | 1-800-233-8990 | CONVENTIONAL Seismic INSTALLATION REQUIREMENTS SUMMARYSEISMIC DESIGN CATEGORYS eismic DesignCategory C per ESR 3336 (Alternate Method) Seismic DesignCategories D, E, F per ESR 3336 (Alternate Method)REFERENCESC orresponding American Society of Civil Engineers (ASCE)