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10-1282 (CSCS) Instruction ManualInstalling Arms,trong Suspended Ceilings An Armstrong suspended The ceiling system is made up of Armstrong mineral fiber ceiling is panels (either 2' x 4' or. 2', x 2') .which are functional, attractive and supported by a suspension system (main provides easy access to the beams, cross tees plenum. This ceiling system installation brochure is intended as a general application overview, covering essential steps of a basic suspended ceiling installation. and hangers), and perimeter molding, The integrity of the entire suspended ceiling depends on the hangers — commonly wires — Armstrong Ceiling System which are used to support the suspension system main beams. Sections of main beams are spliced together and are connected by cross tees. The ends of the main beams and cross tees rest on the wall molding which runs around the perimeter of the space. Before You Start Although temperature and humidity recommendations vary by product, the space must be .cleared of debris and, in general, should be enclosed. • The ceiling panels should `be kept clean, dry, and protected from the elements. Panels should be removed from cartons 24 hours before installation to allow them to adjust to interior conditions. • The tools you will need will vary depending on the type of hangers used, but generally, you will need: ladders or scaffolding; a tape, measure; pencil; chalk line; hammer; powder actuated fastener; awl; pop -rivet gun; screw driver or drill; sheet metal punch; aviation snips; wire cutting pliers; utility knife; level (water level or laser); string; key hole saw; and compass or dividers. Most jobsites also require some safety equipment like a hard hat 2 or safety glasses. Determine Panel Direction • Ceiling panels can run' in tfie direction that yields the .most pleasing finished appearance. • In spaces with bar or wood joists, main beams must be oriented perpendicular to the joists. (You must locate and mark all joists if they have been covered with a drywall ceiling.) Determine Border Panel Sizes (2' X.2' panels)` • To determine the border panel sizes, divide one dimension of the space by 2:, 0.0 ur example shows a space that is 10' 8" by 14'2' and the'deck joists run in the 10' 8" direction. 10' 8" = 2' =five full . panels+ remaining 8". • You can't start with a full panel against one wall and leave one 8" border on the other semi side; it will look unbalanced (and two border panels of 4" would be too small). So, add, 24".to the 8" dimension, which equals 32" Divide that number by 2 to equal 16". • The room would-be divided intofour full panels, plus two 16" border panels. • In the other direction: 14' 2" _ 2' =seven panels + remaining 2" • Add 24" to the 2" dimension, which equals 26'. Divide that number by 2 to equal 13': • This side of the room would have six full panels and two 13" border panels. Main beams must be oriented perpendicular to bar or wood joists 32" F21 Four f II panels p,us two 16 border panels D Determine width of border panels (2' x 2' panels) Determine width of border panels (2' x 2' panels) 3 Determine Border Panel Sizes (2'_X 4' panels) • For 2' x"4' panels, divide one room dimension by,2' as stated above. • Divide the other room dimension by 4' and ' Determine width of border add 48" to remaining dimensions to avoid panels (2 x 4' panus) unsightly small border panels. Install Perimeter Trim • Allow at least three inches below the old ceiling, ducts, pipes or wiring as clearance to maneuver a lay -in panel into the opening of the grid. 1 • Mark the desired height for the new ceiling, k r� adding the height of the wall molding. Mark y a level line around all three walls and snap f a connecting chalk line on the fourth wall. • Attach the molding securely. Screws or 6d (1-1/2") nails work well for wood; use Mark desired height screws for metal; use powder -actuated for new ceiling . fasteners or expanding anchors for concrete and stone walls. Joints between inside and outside corners of mold.ing t must be tight. 4 t i Insta'Il' Hangers and Fasteners Hangers need to be installed above the main beams typically every fourfeet. • Snap chalk line for each of the main beams. Attach hangers and wires to the deck above the first row of main beams at four -foot intervals. Stretch a guide string from one end of the room ,to the other, below the molding where the first main beam will hang. • Stretch a leveling string from one `side to the other 7/8" above the bottom of the wall molding. • Bend the wires at the height of the string so that the main beam is held at the correct height. • Wrap hanger Wire securely around itself three times. Install the First Main Beam • Install the first section of main beam. '(Cut, the end so'that a cross tee routehole is located the border distance in from the end -wall.) • Insert a hanger wire into a hanger wire hole near the other end of the main beam. Bend the wire up and wrap it around itself M.' three times. Continue to insert all other hanger wires. Bend hanger wires at height of guide string Install first main beam 5 Install Border Cross Tees • Find the location of the first border cross tee. • Place the end of the white face of the cross tee against the edge of the wall molding at the side, and cut the cross tee where it Install border cross tees crosses the guide string. • Insert the uncut end of the cross tee into the main, beam, and rest the cut end of the cross tee on the molding. (The far edge of the main beam should be directly above the string.) • Repeat the process for the next cross tee. • Temporarily fasten the cross tees to the " wall molding so they do not move. Square the Grid • Join. additional sections of main beam as required to reach the other end wall. Attach hangers and check level as the installation proceeds. 6 Install' Remaining ;Main Beams and Cross Tees j Complete the installation of rows,of main beams. Note: If you have additional rows of main beams to install, stretch a second string from one side of,the room to the other, aligning it with the first. four foot cross tee as ,shown. • This`second string will be your guide for cutting the remaining rows of main beams. Just',measure from the end wall to the string to determine the distance for the first cross tee'slot you will use. `' `' • You must line up all cross fee slots for the grid to be square. Install Panels - • Slightly tilt panels, lift above framework, and gently rest on cross tee and main beam edges. e Measure and cut border panels. individually. Using a leftover cross tee or main beam section as a straight edge, cut panels face up with a very sharp utility knife. Border panels may require field cutting of Tegular edge details. All field cut edges "exposed to view" should be colored to match the factory finish. Armstrong Super'Coat' Ceiling Panel Touch -up -Paint is recommended. Lighting, and Other Fixtures Lighting and other fixtures must be supported by the grid, not by the ceiling panels.: Depending on the size and .weight of the fixtures, extra'hangers may be required. Y For more information and details about installing Armstrong Suspended Ceilings, call your local Armstrong representative or visit armstrong.gom/ceilings. Align second guide string with first four -foot cross tee Tilt panels above frame and drop into place Tegular-edge border panels may require field cutting. Cut border panels face up . Grid may require extra hangers to support weight of lighting fixtures 7 I r r 1 CEILING SYSTEMS r 1 877 ARMSTRONG (276-7876) • Name of your Inner Circle Contractor, Gold Circle Distributor or Sales Representative • Customer Service Representatives 7:30 a.m. to 5:00 p.m. EST, Monday through Friday t TechLinesm -Technical information - 8 a.m. to 5:30 p.m. EST, Monday through Friday FAX 1-800-572-8324 or email: techlineCarmstrong.com • Product literature and samples - Express service or regular delivery • Request a personal copy of the Armstrong Ceiling Systems catalog armstrong.com%ceilings • Latest product and program news • Real time selection and specification information • Glossary of technical terms • Contacts - reps, where to buy, who will install •r • Submittal pages • Specification writing tool , • Literature and samples information • Perimeter and Corridor Design Solutions, CAD rendering Printed in the United States of America CS -3592-609 ©2009 AWI Licensing Company �mstrongo C,- 1NC I S�Y1S1T1E M,�S [i3etwe_en u_s_, ideas become f.eaIityr WHAT YOU NEED TO KNOW Code Requirements / Seismic Rx® / Tested Solutions Wall -to -Wall Clouds & Canopies Drywall Grid & Framing �mstronga Current Seisrhic Code: Development and Adoption THE. CODE OFFICIAL'S ROLE The 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. A code official can perform their own analysis of evidence presented or can rely on independent, qualified sources such as ICC -ES to do the analysis and provide their findings. PURPOSE of INSTALLATION' REQUIREMENTS FOR SUSPENDED CEILINGS a Provide a suspension system strong enough to resist lateral forces imposed upon it without failing m Prevent border panels from falling from the ceiling plane FEDERAL IMERGENCY MANAGEMENT AGENCY (FEMA) Seismic performance during recent large California earthquakes prompted FEMA to address several concerns including suspended ceiling performance during a seismic event. Research and tests demonstrated that current industry seismic standards (UBC Standard 25-2) were not adequate. To support individual panels around the Perimeter, FEMA determined that the key to good seismic performance is a wider wall molding on all sides. This led to the International Building Code requirement for 2" wall molding on all sides. Source: FEMA 302 NEHRP Recommended Provisions for Seismic Regulations for New Buildings and Other Structures A-DOPTION.OF THE INTERNATIONAL BUILDING CODE Currently all 50 states as well as Washington, D.C. and the Virgin Islands use the International Building Code. r Alaska k, o Hawaiitr Have adopted the Inter nationaF Building Code at a local or state-wide level' Source: http:/Awm.iccsafe.org/govemmenVadopton,htmi (February 17, 2009) ICC makes every effort to provide current, accurate code adoption information, but in some . cases iudsdictions do not notify ICC of adoptions, amendments or changes to their codes. HOW, SEISMIC DESIGN CATEGORIES ARE DETERMINED The seismic design 'category must be specified by a professional engineer or registered architect on the project. drawings per CISCA 0-2, 3-4. The project requirements which include the seismic design category can be found in Section'l of the specification and on the first page of the structural drawings. International Building Code (IBC) allows two paths to determine Seismic Design category - IBC Section 1613 or ASCE 7 Section 11.6. The IBC states that a Seismic Design Category must be established for f each construction project based on'. ® Anticipated ground motion m Soil type in`a specified geographic area Occupancy. category These factors are used to evaluate and establish a Seismic Design Category of A, B, C, D, E or F. The installation of ceilings can be divided into three tiers of increasing requirements: m Categories A & B are installed to meet requirements established in ASTM C636 Ei Category C projects must meet those plus additional provisions listed in the CISCA . recommendations for areas subject to moderate risk o Categories D, E & F must follow ASTM C636, CISCXguidelines for areas subject to severe earthquake risk and eight additional provisions contained in ASCE 7 Section 13.5.6.2.2 Note: Seismic categories are determined for the entire building. This is why the Seismic Design Category information is on the structural drawings. I13C Seismic Installation Requirements IBC CATEGORY IBC.INSTALLATION REQUIREMENTS ...I.................................................................................................... A, B Ceiling installation should conform to basic minimums established in ASTM C636. .......................................................................................................................................................................... C Installed to CISCA recommendations for areas subject to light to moderate seismic activity. m Minimum 7/8" wall molding m Grid must not be attached to the wall molding ® Minimum 3/8" clearance on all sides ® Minimum 3/8",overlap of grid on the wall molding ® Ends of main beams and cross tees must be tied together to prevent their spreading ® Safety wires required on light fixtures D E F Installation must conform to CISCA recommendations for areas'subject to severe seismic activity. IBC categories D, E and F must also meet these additional requirements: ® Minimum 2" wall molding ® Grid must be attached to two adjacent walls — opposite walls must have a 3/4" clearance ® Ends of main beams and cross tees must be tied together to prevent their spreading m Heavy-duty grid system ® Ceiling areas over 1;000 SF must have. horizontal restraint wire or rigid bracing ® Ceiling areas over 2,500 SF must have seismic separation joints or full height partitions Ceilings without rigid bracing must have 2" oversized trim rings for sprinklers and other penetrations ® Changes in ceiling plane must have positive bracing ® Cable trays and electrical conduits must be independently supported and braced 0 Suspended ceilings will be subject to special inspection ® Perimeter support wires Note:.Consult your local code professional for information, specific to your region. ADDITIONAL RESOURCES ON SEISMIC CODES AND REQUIREMENTS Contact TechLine " at Armstrong (Monday through Visit these code related websites: Friday — 7:30 a.m. to 5:3- p.m. EST): n ASTM International: www.astm.org a Phone: 1 877 ARMSTRONG (1 877 276-7876) o National Institute of Building Sciences: a Fax: 1-800-572-8324 www.nibs.org ® Email: techline@armstrong.com o FEMA: www.fema.gov o International Code Council: www.icc-es.org o U.S. Geological Survey: www.usgs.gov Armstrong Seismic Tested Systems ALTERNATIVE MATERIALS AND CONSTRUCTION METHODS Armstrong has tested many items that have not been submitted to the ESR process. We can provide white papers and test reports to document seismic performance; however, many of these products do not have clear code requirements: 613.2.5 Testing Alternative for Seismic Capacity Determination. As an alternative to the analytical requirements of Sections 13.2 through 13.6, testing shall be deemed as an acceptable method to determine the seismic capacity of components and their supports and attachments. Seismic qualification by testing based upon a nationally recognized testing standard procedure, such as ICC -ES AC 156, acceptable to the authority having jurisdiction shall be deemed to satisfy the design and evaluation requirements provided that the substantiated seismic capacities equal or exceed the seismic demands determined in accordance with Sections 13.3.1 and 13.3.2. 13.2.6 Experience Data Alternative for Seismic Capacity Determination. As an alternative to the analytical requirements of Section 13.2 through 13.6 use of experience data shall be deemed as an acceptable method to determine the seismic capacity of components and their supports and attachments. Seismic qualification by experience data based upon nationally recognized procedures acceptable to the authority having jurisdiction shall be deemed to satisfy the design and evaluation requirements provided that the substantiated seismic capacities equal or exceed the seismic demands determined in accordance with Section 13.3.1 and 13.3:2:' Source: ASCE 7, Chapter 13 In some cases there are no clear industry code requirements or acceptance criteria such as: ® Ceilings that do not run wall-to-wall o Indirect hung ceilings As a result seismic performance and engineering information canna be included in an ESR report. In light of this, Armstrong has conducted rigorous testing at the State University of New York, University at Buffalo to demonstrate seismic performance. Test result summaries can be provided to code officials in the form of white papers. For example: In 2004 Armstrong lead the industry with seismic testing documentation summaries and test protocols for our Seismic Rx° Solution. This information set the industry standard and drove the issuance of ESR -1308 in 2006. PRODUCTS NOT COVERED BY AN ESR REPORT Providing a valid ESR report to a code official does represent the "gold standard" for installations. The ESR represents the safest, least risky method for selecting a seismic ceiling solution. Armstrong has tested a number of products that do not appear in an ESR report because these products do not ;ul have, clear code requirements. We will provide performance criteria via white paper or test report based on seismic shake table test results from an ICC -ES and IAS accredited test facility (State University of New York, University at Buffalo). A white paper or test report can be obtained by,calling TechLin& at.1 877 ARMSTRONG (1 877 276-7876). When requesting a white paper or test report you'll be asked to provide the following - project information: 0 Project Name Ei Location ® Product im Customer Contact ® Design Professional Contact SEISMIC TESTED SYSTEMS Product Installation Detail Product, Installation Detail Building Perimeters , Perimeter Pocket with Horizontal Diffuser Seismic Category C Installation per Cie Perimeter Pocket with Vertical Diffusor. Category D, E & F hnstellatiorn per Code Seismic Comdor with 12" Gusset Canopies Capz Seismic Corridor with 8" Gusset Infusions Has Seismic Joint Clip Main Beam (SJMRI5 fully Loaded Infusion Valleys Seismic Joint Clip Man Beam (SIM) Fully Loaded Infusions (Groin Seismic Joint Main Beam Splice MetaMlorks Seismic Separation Joint on Prelude XI- Sa;ndScapas Canopies Seismic Separation Joint on Wine XL MetalWarksWngs woodworks Seismic Rx BERC2 45 -degrees to the VvVl on Prelude XL BERC2 Fully Loaded on Prelude XL Clouds 6'x 6',12' x 12' and 14'x t 4' Format ors BERC2 on 7897 Shadow Molding with Ultima Vector Panels 12" Mom Floating 2 -sides with Prelude XL ID BERC2 on Interlude ' 12" Adorn Roating Cloud with Prelude XL ID . , BERC2 on Interlude v& Lights &'Sprinklers 6" Main floating 2 -sides with Prelude XL 10 BERC2 on Silhouette XL with Diffusers & Sprinklers 6" Mom Floating Cloud with Prelude XL ID BERC2 with Prelude XL hhtormediate Duty Formations Curves BBV vath Supra XL Serpartina Classic Prelude XL - Alternate Category C. Sepem na waves SoundScapes Shapes ' Standard T -Bar Grid System ' DC FlexZnne Fully Loaded Comdors Acoustirai Locking Angle Mold with 8" Gusset Metaphors Acoustical Lording Angle Mold with 12" Gusset Optima Radial Ceiling Acoustical Locking Angle Mold with Fiberglass Paras Optima Vector Acoustical Locking Angle Mold v& Mineral Fiber Panels Optima Vector 2' x 8' Planks Corridor Shortspan Corridor System with Gusset Qotima Vector 4'x 4' Dry wallSystems 6' DGS Tees i Prelude XL Fire Rated DryWdll Grid System Prelude XL Intermediate Duty QuikStiik Locking Pocket Man Prelude XL to Black Iron NYC Sh plop Fug Room ShortSpan 14' Silhouette XL with Shadow Molding Shoriapan 6'. Skhped Ceiliny Metalwodks Conor -tons Suprafine XL Installation per Code Faceted Tri Ceiling TechZone Fasback 8", 6" and 12" UPdma Bever Tegular Flush Tegular on Prelude XL Ultima Vector Linear Curved and RatAccess Open 4„and a, Linear Curved Planks Linear flat RH 200 Linear Woad RH 200 Cantilevered Curved' Tegular on Prelude XL RH 215 Curved Vector on Prelude XL RH215 Harrow Reveal 2' x 6% 2' x 8' and 4' x 4' Square Tegular on Prelude XL Standard Planks Tartan 3" Tartan 6" with Mega Panels Taxan 6" with Planks Vector on Prelude grid Other CaPz STATE UNIVERSITY OF NEW YORK, UNIVERSITY AT BUFFALO Armstrong has' partnered with The Universifyat Buffalo to test our products for seismic performance. These tests are performed at the Structural Engineering and Earthquake Simulation Laboratory (SEESL) located in K: ter Hall. SEEK is a key equipment site in a nationwide earthquake engineering collaborator - the National Science Foundation's George E. Brown, Jr. Network for Earthquake Engineering Simulation (NEES). This network allows earthquake engineers and students from different institutions to share resources, collaborate on testing and exploit new computational technologies. Seismic Rx allows you 2" wall angles are prone to the following problems i- : to eliminate unsightly ®Difficult to keep "tight" to wall .......................................................................................................................................................................... In IBC Category D, E and F —Armstrong Seismic Rx benefits include: ,- 2" wall angle in ®Difficuh to install comers 1, Category D, E; F � Prone to twisting and warping seismic -compliant installations. ® Reduces material costs by using 7/8" molding ® Eliminates stabilizer bars 13 Eliminates installation hassles from 2" wall molding . IBC Armstrong Seismic Rx Suspension System Category ICC Report ESR -1308. " IBC Installation Requirements D, E, F ® Minimum 7/8" wall molding M Minimum 2" wall molding ® Grid must be attached on Iwo adjacent walls — 0 Grid must be attached to two adjacent walls — opposite walls require BERC2 with 3/4" clearance opposite walls must have a 3/4 clearance ® BERC2 maintains main beam and cross_ tee spacing; 0 Ends of main beams and cross tees. must be tied no other components required together to prevent spreading ® Heavy-duty systems as identified in ICC -ESR -1308 ® Heavy-duty grid system (refer to Suspension Systems listed on page 7) .............................................................................................................................................................. In IBC Category C —Armstrong Seismic Rx benefits include: IM Easier to square the system by cutting tight to adjoining walls A ® Tighter, more secure installation m Eliminates stabilizer bars IBC Armstrong Seismic Rx Suspension System Category. ICC Report ESR -1308 IBC Installation Requirements C ® Minimum 7/8" wall molding ® Minimum 7/8" wall molding ® Grid may be cut tighYon two adjoining walls ® Grid must not be attached to the wall molding M Minimum 3/8" clearance on two unattached walls ® Minimum 3/8" clearance on all sides ® BERC or BERC2 on all main beams ® Minimum 3/8" overlap of grid on thewall molding ® Ends of main beams and cross tees must be tied together to prevent spreading FULL-SCALE SEISMIC TESTED Armstrong has partnered with the State University of New York, University at Buffalo to test both standard and non-standard ceiling systems for seismic performance. Armstrong submitted the following evidence to ICC -ES: m Dynamic Testing — Seismic Oualificabon by Shake Table Testing ® Static Testing -Vertical, Compression and Tension Loads IBC code allows altemative designs if tests are conducted and evidence of compliance is submitted. Thus, code officials may approve other installation designs based upon the following: Section 104.11 Aftemative materials, design and methods of construction and equipment The.provisions of this code are not'irdended to preveMjthe installation of'any material or to; prohibit any design.or method of construction not specifically prescribed by this code, provided that any such'alternative has been approved: Section 104.11.1 Research reports, Supporting data, where necessary to assist in the ' approval of materials or assemblies not specifically provided for in this -code, shall consist of:valid research repo' rt5from approved sources. Section 104.11.2 Tests. Whenever there is insufficient evidence of compliance with the provisions 'of this code, or evidence that a mated al`or method does not conform to the requirements of this j code, or in order to substantiate claims for altemative materials or methods, the building official shall. have the authority to require tests as evidence.,of compliance to be made at no expense to the jurisdiction. source: IntemationN Budding Code 2006 r _ I ESR -1308 LIST SPECIFIC ARMSTRONG COMPONENTS AND METHODS OF INSTALLATION The performance of the Armstrong Seismic Rx'' Suspension System is based on specific combination of components and method of installation. Other manufacturer's components and installation methods were not tested and are not covered in ESR -1308. Substitution of other components puts the system at risk and is not allowed by the ESR report The following ceiling and grid systems are included in ESR -1308. These systems were tested to withstand seismic forces in all IBC categories. All ceilings have test details and summaries to support the demonstrated performance and integrity of the system. FAMILY NAME DESCRIPTION PRELUDE" XLr, 15/16" Exposed Tee System/Fire Guard -15/16" Exposed Tee System/15/16" Environmental Tee System SILHOUETTED XL 1/4" Reveal 9/16" Bott-Slot System/1/8" Reveal 9/16" Bolt -Slot System SUPRARNEQD XL 9/16" Exposed Tee System Fre Guard 9/16" Exposed Tee System INTERLUDE' XL 9/16" Dimensional Tee System SS PRELUDE PLUS XL 15/16" Environmental Tee System" 'Not available in Heavy -Duty. ICC -ES EVALUATION SERVICE ICC -ES does technical evaluations of building products, components, methods, and materials. The evaluation process culminates with the issuance of technical reports that directly address the issue of code compliance. These reports are extremely useful because regulatory agencies use evaluation reports to help determine code compliance and enforce building regulations; and manufacturers use reports as evidence that their products (and this is especially important if the products are new and innovative) meet code requirements and warrant regulatory approval. ICC -ES employs a large staff of professionally licensed architects and civil, structural, mechanical and fire protection engineers. The members of the ICC -ES technical staff are experts in the application of model codes, and also have access to historical information relating to product evaluation. When developing acceptance criteria ICC -ES routinely seeks input from building industry experts through a process of open public hearings. These hearings are conducted by an independent committee composed of code officials who actually enforce building regulations. FIA r Seismic Rx''Approaches to Category D, E and F Installation's ;. , - •.,... Attached Wall. , - ,. .. • ' -. .: ': , , . _ BEIIC2 CilPe: _ r :. BEIIC2 CIIPS i' :Ofl PoP i - in - :_ yUP i i I l r I. BE G: .. AMtlrOtl Well fly' sup B B B r P B P •.......... ........ L �, .................. 1 o o ' �^p .. - i.= - Unattached Wall r . - . .. - .. .. B B urattearedWWI X Hanger Wire B BMC or BERC2 ale, . - P Pop fllvets SEISMIC _RX CODE COMPLIANT-SOLUTIONS AND BENEFITS (ESR-1308) m Narrow, sleek aestheticwith standard 7/8" molding in Attached grid on two adjacent walls with the BERC2 ® Eliminates, installation'and aesthetic problems or pop rivets : associated:with 2" wall molding': m BERC2 clip with 3/4" clearance on unattached walls' ® Lower cost solution ® Better access to the plenum - ° ® Eliminates stabilizer bars ® Eliminates visible pop rivet§'through the wall angle ' ® More profiles from which to choose . ;o IBC Approach .to Category D, E and .. . F Installations P A.hod Woe P " P o, _ IBC REQUIREMENTS :.. 2" molding ® Attached grid on two adjacent walls o with pop rivets, screws or other means ® 3/4" clearance at perimeter on unattached A1ocheO Way walls and stabilizer bars to prevent the m spread of mains beams and cross tees ' ® vy- iy'grid Hea du Xwi.. P PoP mm. ' • .I IAR. z4 F1 2'o.0� ' d" ;rUnaMaGred:Wall - Uratlahed Wall - f Seismic Rx® Approaches to Category C Installations- now, Wa BERC BERC2 '- � B �B e SEISMIC RX CODE COMPLAINT B : SOLUTIONS AND BENEFITS F N+ M�� B I "'d� (ESR-i 308) . I B . Meets code requirements Easy to square the system B ..........t wall nBmwaB Eliminates stabilizer bars e 13 Better acess to the plenum 3 c ® Narrow, sleek aesthetic with standard I B 7/8" molding BERC BERC2 I( C_ T_ ® Grid can be tight on two adjoining a I walls — can use the BERC or BERC2 113Intermediate duty grid _ -._• !� B -il .:_ are' 2•n.c I Clearance WaO ,CleerarKe WaO -; e III— . Ye' CJearm¢e WWI X'Hwgvffiire. . _.. - B BERC of 8BlC2 Clip - - IRC Approach to Category C Installations Unattached Wall ' - IBC REQUIREMENTS ® 7/8" molding m 3/8" clearance on all sides; 3/8" overlap of the grid on the wall molding 0 Prevents the spread of mains/cross tees with stabilizer bars Im Intermediate-duty grid Preventing border Panels " from Falling = Installation Tip THE CASE FOR PERIMETER WIRES In full-scale seismic test,evaluations for areas subject to severe seismic motion, the common cause of system failure came from damage to cross tee end connectors (Armstrong and competitive systems). Damage occurred in one of two ways: im Connector clip bends m Base.metal bends When this damage occurs, it allows unbraced sections of ceiling to move up to 3/8" at each connection. The cumulative effect of damage at the cross tee connections may move the ceiling more than 2 Without perimeter support wires, test results demonstrate that the load of the ceiling may cause the main beams and cross tees to -move beyond the 2" wall molding and drop out. System failure at the perimeter does not conform to the requirements of the code. I d; a Damage at cross tee connections Unsupported cross tees allow panels allows ceiling movement. to drop out. .. Braced A B C D E Seisrnic Separation Joints . . PURPOSE OF SEPARATION JOINTS ASCE 7 Section 13.5.6.2.2,mandates that ceiling'areas greater than 2,500 SF must have seismic separation joints, closure angles and horizontal restraints. This means 2" molding, perimeter spacer bars— and if the area is greater than 1,000 SF lateral force bracing.It is thought that these measures willprevent the accumulated forces from overpowering an individual suspension system connection. This method of failure was observed after some strong California quakes in the 1980s. The code does not describe how to construct the separation joint. Initially, we responded to inquiries by,providing an expansion joint detail fabricated from. steel moldings. This type of joint is widely accepted because it is familiar to inspectors and because the width of the separation can be set to match whatever the project designer requires. However, many designers find this method objectionable: m Traditional field -fabricated expansion joint details are very noticeable on the ceiling plane m The system is not very rigid and the grid system can move "off module" ARMSTRONG DELIVERS TESTED SOLUTION Armstrong has done full-scale testing which confirms that a ceiling fitted with our Seismic Joint Clip - for Main Beams (SM) and Seismic Joint Clip for Cross Tees (SJCG & SCJSI) performs as well as a field fabricated separation joint. Additional benefits to these seismic -tested separation joints are: SEISMIC JOLT CLIP _ MAIN BEAM (SJMR) , ® Gives architects and designers a.clean look (not visible from the floor) ® Saves contractors time with a reliable installation method ® Easily installs in minutes at main beam splice ® Maintains integrity of ceiling module, unlike field assembled alternatives m Allows for full acoustical panel at the joint ® Easier to keep the ceiling system square, c , e ° ° ° i SEISMIC JOINT CLIP CROSS TEE (SJCG & SJCSI) ®.Gives architects, and designers 9 clean look (not visible from the floor) a Saves contractors time with a reliable installation method a Installs in minutes, no need to cut the face of the grid to install clip 13 Eliminates the need for additional hanger wires 0 Maintains integrity of the ceiling module, unlike field assembled alternatives m Allows the use of full size panels m Works with our PeakForm" grid (SuprafineO, Prelude*) and square bulb grid (Silhouette® and IntedudeO) 01 Separation Joint'Layout Details .................................... .............. ...... ............... .................. 4' Maln• Mein BeamBeam2 ­4'�SJMR _4'C T_ -d,r.--T— U SJMR in 2' X.4' Layout, SJMR and SJC in 2'x 4' Layout Bracing and Restraint for Seismic Installations ................................................. ..................... .......................... ....... . ........................................................ DIFFERENCE BETWEEN BRACING AND RESTRAINT Attachment to the wall is considered restraint. Bracing is a form of restraint (compression post and wires). SJMR and SJG in 2'x 2' Layout Typical seismic bracing for a wall-to-wall ceiling consists of clusters of four 12 -gage wires arrayed 900 from one anotherand attached to the main beam within 2" of a cross tee intersection. These wires are to be angled no more than 450 from the plane, of the ceiling. The compression post is attached to the grid at the cluster of wires and extends to the overhead structure (see Figure 1). The compression post needs to be engineered for the application and the longer its length the more substantial it must be. Typical post materials are EMT conduit or steel stud (see Figure 2). The code also allows for the use of rigid bracing. The advantage here is that when a rigid member is used in place of wires it can' handle loads in two directions (push and/or pull) so only two diagonals and one vertical are needed at each location. STEEL STUD COMPRESSION POSTCOMPRESSION POST 12 GA HANGER WIRE - TYP.4'-0' O.C. (3 1712 HANGER . TIGHT WRAPS) - - 45° OR LESS WIRE 45° OR LESS MAIN BEAM " 45° 12 SS G0. OR LE BRACE WIRES ARMSTRONG 45° OR LESS CROSSTEE� ARMSTRONG MAIN BEAM 'CROSS ES Figure 1 Figure 2 z -0.0.a Typical wall-to-wall ceiling restraint is achieved by proximity or attachment to the perimeter angles which are fixed to the walls.,Seismic Design Category C allows some movement but limits are established by setting the required clearance at 3/8". Seismic Design Categories D, E and F require the ceiling grid to be fixed to the wall molding on two adjacent walls. This attachment to the molding is the first element of restraint. As the ceiling area gets larger and the mass (or weight) of the ceiling increases additional restraint must be applied in the form of "lateral force bracing." Clouds and Canopies ................................................................................................................................. INSTALLING CLOUDS Armstrong defines a cloud as a ceiling that is not connected to a wall on any side. ASCE-7 Design Manual, Section 13 states that the design of architectural components and their supports is required to meet minimum values as calculated in Section 13.3.1 for seismic force and Section 13.3.2 for lateral displacement. Ceilings are a line item on the chart associated with these calculations. Unless specifically exempted by the local authority, it should be assumed that.a cloud —(architectural component) comprised of grid and panels must be restrained. Part of the formula used in these calculations takes'seismic design category into consideration, so the minimum force values will go down or up as. the seismic risk changes. During our testing of cloud ceilings we switched from splayed wires to rigid bracing. The primary . reason is so we don't have wires extending beyond the edges of the cloud. We installed a vertical post and two diagonals at the grid intersection closest to each corner of the cloud and then not more than 12 feet imeach direction. During testing the plenum is typically 30 inches deep. We have successfully used 1/2" diameter EMT for post and diagonals on all such tests. The EMT ends are flattened and bent to facilitate attachment to structure and grid. Install the post first, then connect the diagonals to the lower end of the strut just above the grid bulb. Restraint for a cloud is diagonal bracing to the structure and since clouds are not attached to two walls they must have restraints. In addition to building code requirements, there is a particular installation benefit for a contractor to restrain a ceiling that does not run wall-to-wall. A restrained ceiling is easier to keep straight and square. Some contractors will initially. opt to skip this step in an attempt to save money. However, it is not advisable to do so because rework to fix alignment issues can add more labor costs than if the bracing would have been done at the onset. Typical restraint for a floating ceiling takes'the form of rigid diagonal braces that extend from the_ suspension system members to the overhead structure. Sufficient restraint points must be used to meet the -force values required by the code and to prevent movement in all directions. Additionally, the strength of the bracing members must also be matched to the anticipated applied forces. 'in areas subject to light seismic activity this restraint can often be achieved with sections of wall molding or main beam. However, as the seismic forces increase so must the rigidity or stiffness of the bracing. When the, lateral forces match or exceed the weight of the ceiling assembly or when splay wires are used, a vertical post or strut must be added to prevent the suspension system from lifting. IBC calls for this start to be added when the project is designated as Seismic Design Category D. DISTANCE BETWEEN A CLOUD AND WALL OR ADJACENT CLOUD There is no minimum required as long as clouds are restrained to meet the Seismic Design Category. Our testing has found that rigid bracing at all four comers meets the requirements of Seismic Design Categories D, E and F for clouds up to 200 SF if: m Bracing varies based on the cloud area, weight and plenum depth ® The bracing is designed by the project engineer Keep in mind that hanger placement is determined by the length of the cantilevered component. It is not a line of sight,issue. Also, a cloud will require the same bracing and restraint with or without sprinklers. INSTALLING CANOPIES Armstrong. defines a canopy as a single, unique architectural element which is independently suspended from the building structure. We have found through testing that it is not practical to restrain an individual canopy. If canopies arranged in a group can be connected together it is possible to restrain the entire assembly. Wood or metal canopies can be joined by attaching an appropriately sized metal stringer across the back of the grouping and then adding vertical and diagonal bracing to the assembly. SoundScapesp Shapes panels installed on the grouping frame can be restrained by adding vertical and diagonal bracing to the grouping frame assembly. Note: A 114" diameter threaded rod would be compatible with the grouping frames used to cluster SoundScapes Shapes panels and it can be'tumed into the threaded holes located at the comers of the frame imbedded into the back of individual SoundScapes Shapes panels. A threaded rod is not mechanically compatible with any of our other canopies. Note: When multiple SoundScapes Shapes panels are installed on grouping frames they perform like a cloud and should be installed to meet those restraint guidelines. The preceding guidelines,are based on the 2006 edition of IBC. The 2003 requirements state that the architectural component may not "be damaged or cause damage." When 2003 requirements are in place the dimensions listed above are required between the canopies and walls or any other element that might,cause them damage. Additionally, when two canopies are suspended adjacent to one another the clearance between them would need to be doubled. Note: When concealing hangers on canopies your options are limited. Make sure the hangers are as plumb as possible and paint to blend in with the plenum. i DISTANCE BETWEEN CANOPIES The IBC 2006, through reference to ASCE 7, provides an exception to the restraint requirement for architectural components stated in section 13.5.1. This exception is for "components supported by chains or otherwise suspended from the structure" so long as all of the following criteria are met: s Design load must be equal to 1.4 times the operating weight acting in both vertical and horizontal directions ■ The component may not cause damage to an essential building element ■ The connections to the structure must allow a 3600 range of motion The first and third points can be established through design. However, the second could lead a code compliance official to require clear space between the component and an essential element equal to or greater than the length of the supporting chains or cables. Length and the placement of the hanger attachment points have a significant impact on how far the canopy will move. In general terms, the following reactions have been demonstrated through shake table testing: m The closer the hanger attachments are to the edges of the canopy, the lower the motion ■ The longer the hangers, the lower the motion ■ The heavier the canopy, the lower the motion Each of our canopy products is designed with the hardware set in predetermined locations. Each has been tested to determine the maximum amount of movement that can occur, and therefore the clearance required from essential building elements. TESTING RESULTS FOR CANOPY SPACING Infusions® Accent Canopies: SoundScapee Acoustical Canopies: SoundScapes Shapes Acoustical Clouds (single panel suspended from cables): WoodWorks° Canopies: Equal to cable length for short cables, 8" max for cable lengths 20" or greater Maximum of 18" Maximum of 18" Maximum of 18" These results can be found in the "Seismic Restraint" section of the installation instructions for each product category. Armstrong Drywall Grid Systems (ESR -1289) BENEFITS OF ESR=1289 ESR reports are the most recognized reports within the construction industry by code officials for the code compliance and performance of construction materials. ESR -1289 represents an ICC code - compliant system for suspended ceiling mounted drywall installations. The drywall grid components listed in ESR -1289 meet ASTM C645 and are UL Fre Rated, Armstrong Drywall Grid offers a labor and cost saving method of meeting seismic code without risk of delaying your construction schedule. Additional benefits of ESR -1289 are: 0 Elimination. of the lateral load design requirements (see ESR -1289, Section 4.4.1) ® Recognition and approval of DGS 6' tees (XL8965) and 6' spacing of mains reduces material, hanger wire and installation time ® UL approval of XL8965 in fire -rated applications ® Recognition of fire -rated Type "17" tees - XL8947, XL8947P, XL8925 and XL8918 SEISMIC INSTALLATION REOUIREMENTS FOR DRYWALL CEILINGS The seismic performance of Armstrong Drywall Grid is based on specific combination of components and method of installation. ESR -1289 provides the evidence that these systems were tested to withstand seismic forces in all IBC categories. However, ESR -1289 is intended for use as a guide and is not a substitute for the actual building code. Armstrong recommends checking with the Authority Having Jurisdiction for the exact requirements of your municipal building code. Califomia's Office of Statewide Health Planning and Development (OSHPD) and Division of the State Architect.'- Structural Safety (DSA -SS) are the two groups most likely to express this view. These groups are responsible for schools, medical facilities and state owned/leased essential service properties, Before IBC was adopted these groups used UBC 25-2 supplemented with their own amendments which were contained in a set of Interpretations of Regulations (IR) documents, The IRs pertaining to drywall ceilings have not been updated with the adoption of IBC and are no longer referenced on the OSHPD/DSA-SS website. However, OSHPD/DSA does have a set of amendments imbedded into the new California Building Code (CBC). Some inspectors are using the old guidelines and others are following the letter of the new code. As a result some project contractors are being asked to provide 2" molding, perimeter wires and lateral force bracing. IBC "and CBC list requirements fo"r gypsum assemblies in Chapter 25. This document references ASTM C754 as the standard practice for framing installation for these assemblies. While most of C754 speaks to stud and carrying channel/hat track materials there is a section dedicated to grid systems. 6.7 Grid Suspension System — Main beams shall be suspended in parallel rows spliced together at their ends. 6.7.1 Hangers for supporting the main beams shall comply with the minimum size and ceiling area specified in Table V 6.7,2 Cross furring members of grid suspension systems shall interlock to the main beams in rows running perpendicular and spaced not to exceed maximums specified in Table 1. Cross furring members along the ceiling perimeter shall be supported by angle or channels attached to the wall. '0754-08, Section 6.1.1 has been revised to allow for 16 Sq. rt spacing of 812 hanger wire for drywall suspended ceiling systems. No additional requirements are made for seismic installations, grid systems or stud and track. The assumption is that the attachment of the drywall panels to the grid is capable of transferring the lateral force to the surrounding walls. The remedy for some projects questioned by OSHPD/DSA has been to recommend that the drywall ceiling be designed as a "diaphragm." ASCE 7, Section 12.10 provides reference to this process. This recommendation can be used wherever drywall ceilings are challenged, not just in California. Designing the ceiling as a diaphragm is purely an engineering exercise. The engineer must verity that there is sufficient strength in his drywall and grid to make sure that the seismic forces can be transferred to the structure. By doing this the engineer will avoid the need for 2" wall angle, lateral force bracing and all of the other "ceiling" requirements. It is our understanding that drywall ceilings are exempt from the requirement of 2" closure angle, lateral force bracing and perimeter wires. This .conclusion is based on review of all of the referenced documents, which are as follows: ■ Chapter 25 of IBC ■ OSHPD/DSA amendments to IBC ■ ASTM 754 ■ ESR -1289 ■ CISCA seismic recommendations ■ ASTM E580 ■ OSA IR Manual 1 For More Information SEISMIC -READY GSI SPECIFICATIONS When you turn to Armstrong for technical support, specifying your ceiling design for a specific seismic category is easy. Whether you build your spec on our website or call one of our TechLine experts, you'll get a, detailed seismic -ready specification: MEED. ANSWERS FAST? GET HELP FROM THE EXPERTS Contact our seismic experts to help you with your seismic code questions and ceilings designs. You'll get selection information, performance and product data with test details, specification details, design details and construction methods. 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