April 18, 2018 PARTIES INTERESTED IN ADHERED PORCELAIN TILE WALL CLADDING SYSTEM

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1 April 18, 2018 TO: SUBJECT: PARTIES INTERESTED IN ADHERED PORCELAIN TILE WALL CLADDING SYSTEM Proposed Acceptance Criteria for Adhered Porcelain Tile Wall Cladding System, Subject (YM/DO) Hearing Information: Tuesday, June 5, :00 am Hilton Los Angeles Airport 5711 West Century Boulevard Los Angeles, CA (310) Dear Colleague: You are invited to comment on a proposed new acceptance criteria, AC503, which will be discussed at the Evaluation Committee hearing noted above. The criteria provides requirements for the evaluation of adhered porcelain tile wall cladding systems used in exterior applications under the 2018 and 2015 International Building Code (IBC) and 2018 and 2015 International Residential Code (IRC). The proponent of AC503 is Elemex, Inc. and their cladding system is branded Ceramitex. For information on the proponent and their product, you can visit their website at You are invited to submit written comments on this or any other agenda item, or to attend the Evaluation Committee hearing and present your views in person. If you wish to contribute to the discussion, please note the following: 1. Regarding written comments and presentations: a. You should submit these via to es@icc-es.org or by U.S. mail to the Western Regional (Brea) office to be received by the applicable due date. b. Comments are to be received by May 9, These written comments will be forwarded to the committee before the meeting, and will also be posted on the ICC-ES web site shortly after the deadline for submission. Written comments that are not submitted by this deadline will not be considered at the meeting. c. Rebuttal comments, from the proponent noted in this letter, are to be received by May 18, They will be forwarded to the committee before the meeting, and will also be posted on the ICC-ES web site shortly after the deadline for submission. Written rebuttal comments that are not submitted by the deadline will not be considered at the meeting.

2 2 d. Visual presentations, in PowerPoint format only, are to be received by May 30, These will be forwarded to the committee before the meeting, and will also be posted on the ICC-ES web site shortly after the deadline for submission. Presentations that are not submitted by the deadline cannot be viewed at the meeting. Note: Videos will not be posted on the web site. Presentations will be retained with other records of the meeting. It is the presenter s responsibility, prior to the presentation, to verify with ICC-ES staff that the presentation files have been transferred satisfactorily to the presentation computer. e. ICC-ES will post to the web site, on June 1, 2018, memos by the ICC-ES staff, responding to the previously received public comments. f. If you miss the deadlines for submission of written comments and visual presentations, your verbal comments can be presented at the meeting. g. Proposed criteria, written public comments, visual presentations, and responses by ICC-ES staff will be available at the meeting on a limited number of CDs for uploading to computers. ICC-ES will not provide any printed copies. 2. Regarding verbal comments and presentations: Please plan to speak for not more than ten minutes. As noted above, visuals must be in PowerPoint format. We have a computer, projector, and screen available to those making visual presentations. It is the presenter s responsibility, prior to their presentation, to verify with ICC-ES staff that presentation files have been satisfactorily transferred to the presentation computer. 3. Keep in mind that all materials submitted for committee consideration are part of the public record and will not be treated as confidential. It is the presenter s responsibility to certify to ICC-ES staff that no materials infringe copyright. 4. Please do not communicate with committee members before the meeting about any items on the agenda. We appreciate your interest in the work of the Evaluation Committee. If you have any questions, please contact me at (800) , extension 3691, or Darby Owenby, P.E., Staff Engineer, at extension You may also reach us by at es@icc-es.org. Yours very truly, YM/raf Encl. cc: Evaluation Committee Yamil Moya, P.E. Senior Staff Engineer

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6 (800) (562) A Subsidiary of the International Code Council PROPOSED ACCEPTANCE CRITERIA FOR ADHERED PORCELAIN AC503 Proposed PREFACE Evaluation reports issued by ICC Evaluation Service, LLC (ICC-ES), are based upon performance features of the International family of codes. (Some reports may also reference older code families such as the BOCA National Codes, the Standard Codes, and the Uniform Codes.) Section of the International Building Code reads as follows: The provisions of this code are not intended to prevent the installation of any materials or to prohibit any design or method of construction not specifically prescribed by this code, provided that any such alternative has been approved. An alternative material, design or method of construction shall be approved where the building official finds that the proposed design is satisfactory and complies with the intent of the provisions of this code, and that the material, method or work offered is, for the purpose intended, at least the equivalent of that prescribed in this code in quality, strength, effectiveness, fire resistance, durability and safety. ICC-ES may consider alternate criteria for report approval, provided the report applicant submits data demonstrating that the alternate criteria are at least equivalent to the criteria set forth in this document, and otherwise demonstrate compliance with the performance features of the codes. ICC-ES retains the right to refuse to issue or renew any evaluation report, if the applicable product, material, or method of construction is such that either unusual care with its installation or use must be exercised for satisfactory performance, or if malfunctioning is apt to cause injury or unreasonable damage. Acceptance criteria are developed for use solely by ICC-ES for purposes of issuing ICC-ES evaluation reports Copyright 2018 ICC Evaluation Service, LLC. All rights reserved.

7 Page 2 PROPOSED ACCEPTANCE CRITERIA FOR ADHERED PORCELAIN TILE WALL CLADDING SYSTEM INTRODUCTION 1.1 Purpose: The purpose of this acceptance criteria is to establish requirements for exterior wall cladding systems comprised of porcelain tile panels or slabs adhered to aluminum extrusions to be recognized in an ICC Evaluation Service, LLC (ICC-ES), evaluation report under the 2018 and 2015 International Building Code (IBC) and the 2018 and 2015 International Residential Code (IRC). Basis of recognition is IBC Section and IRC Section R The reason for this criteria is to establish evaluation guidelines for recognition of an adhered porcelain tile exterior wall cladding system under the IBC and IRC. 1.2 Scope: This criteria covers porcelain tile panels or slabs factory-adhered to aluminum frame used as exterior wall cladding. The porcelain tile panels must be manufactured to comply with the requirements of ANSI A137.3 for back-layered porcelain tile panels. The porcelain tile panels are factory-adhered to an aluminum subframe along the perimeter and may also include intermediate framing members also adhered to the back of the porcelain tile with structural silicone sealant (adhesive) complying with ASTM C1184. The porcelain tile and aluminum subframe assembly is then installed in the field using aluminum clips and fasteners which connect to the wall framing. Other features of the wall cladding system include aluminum composite material (ACM) joint infill strips used to conceal clips and fasteners used to attach exterior wall panels to the wall framing. Recognition under this criteria will address the following: Types I, II, III, IV or V (combustible and noncombustible) construction Fire-resistance-rated and non-fire-resistance rated construction

8 Page Weather protection of exterior walls Performance of adhesive to bond porcelain tiles to aluminum subframing to resist gravity(self-weight), wind and seismic loads. Jobsite adhesive application is outside scope of this criteria. 1.3 Codes and Referenced Standards: Where standards are referenced in this criteria (AC503), the standards shall be applied consistently with the code edition upon which compliance is based. Editions of the standards applicable to each code edition are summarized in Table 1 unless noted otherwise and 2015 International Building Code, International Code Council and 2015 International Residential Code, International Code Council ANSI A , American National Standard Specifications for Gauged Porcelain Tile and Gauged Porcelain Tile Panels/Slabs, American National Standards Institute ASTM B221, Standard Specification for Aluminum and Aluminum-Alloy Extruded Bars, Rods, Wire, Profiles and Tubes, ASTM International ASTM C1184, Standard Specification for Structural Silicone Sealants, ASTM International ASTM D635, Standard Test Method for Rate of Burning and/or Extent and Time of Burning of Plastics in a Horizontal Position, ASTM International ASTM D1929, Test Method for Determining Ignition Properties of Plastics, ASTM International.

9 Page ASTM E84, Standard Test Method for Surface Burning Characteristics of Building Materials, ASTM International ASTM E119, Standard Test Method for Fire Tests of Building Construction and Materials, ASTM International ASTM E330, Standard Test Method for Structural Performance of Exterior Windows, Curtain Walls and Doors by Uniform Static Air Pressure Difference, ASTM International ETAG-002, 3 rd Amendment dated May 2012, Guideline for European Technical Approval For Structural Sealant Glazing Kits (SSGK), Part 1: Supported and Unsupported Systems, European Organization for Technical Approvals. This document can be downloaded at, NFPA 285, Standard Method of Test for the Evaluation of Flammability Characteristics of Exterior, Nonload-bearing Wall Assemblies Containing Combustible Components Using the Intermediate-scale, Multistory Test Apparatus, National Fire Protection Association UL 263, Standard for Fire Tests of Building Construction and Materials, UL LLC UL 723, Test for Surface Burning Characteristics of Building Materials - with Revisions through May 2005, Underwriters Laboratories, Inc. 1.4 Definitions: Porcelain Panel: A porcelain panel is comprised of a back-layered porcelain tile slab adhered to an aluminum subframe. The back-layered material is a reinforcing mesh that has been attached to the back of the tile after firing.

10 Page Wall Cladding System: The wall cladding system is comprised of the porcelain panel connected to wall framing with clips and incorporating MCM joint infill strips. 2.0 BASIC INFORMATION 2.1 General: The following information shall be submitted: Product Description: Information on the wall cladding system and its components (porcelain tiles, structural silicone sealants, aluminum framing and MCM) shall be submitted Installation Instructions: Installation instructions shall be submitted, and include details on the method of connecting porcelain panels to wall framing. Installation instructions shall describe allowable field modification of porcelain tiles Packaging and Identification: A description of the method of packaging and field identification of the porcelain tiles with aluminum subframing. Identification provisions shall include the evaluation report number. 2.2 Testing Laboratories: Testing laboratories shall comply with Section 2.0 of the ICC-ES Acceptance Criteria for Test Reports (AC85) and Section 4.2 of the ICC-ES Rules of Procedure for Evaluation Reports. 2.3 Test Reports: Test reports shall comply with AC Product Sampling: Sampling of the wall cladding system components used for tests under this criteria shall comply with Section 3.1 and 3.3 of AC Qualification Test Plan: A qualification test plan shall be submitted to and approved by ICC-ES staff prior to any testing being conducted. 3.0 TEST AND PERFORMANCE REQUIREMENTS

11 Page Porcelain Panel Components: The following requirements apply to the products used in the manufacturing of the porcelain panel: Porcelain Tile: The porcelain tile used to fabricate the porcelain panel shall be tested under the requirements of Table 2 and 4 (for walls of nominal thickness, with or without back layering 5 to 6.5 mm) of ANSI A The tested tile must comply with the specifications in Table 4 of ANSI A137.3, unless noted otherwise. Ten replicate specimens shall be tested for each test as follows: Thickness and average difference from nominal thickness (test each tile thickness) Water absorption (test thinnest and thickest tile) Back-layer Saturation (test each tile thickness) Chemical Resistance (test each tile thickness) Stain Resistance (test each tile thickness) Thermal Shock Resistance (test each tile thickness) Thermal Expansion (test each tile thickness) Breaking Strength (test each tile thickness). In addition to complying with Table 4 of ANSI A137.3, test results shall be used to establish minimum breaking strength properties for quality control documentation. Modulus of Rupture (test each tile thickness). Resistance to Freeze-thaw cycling (test each tile thickness). After exposure the tiles shall show no evidence of cracking, disintegration, spalling or total weight greater than 0.5 percent.

12 Page Structural Silicone Sealant (Adhesive): The adhesive used to adhere the back of the porcelain tile to the aluminum subframing shall be tested and comply with the requirements in Table 1 of ASTM C1184 and additional requirements as noted in Sections of this criteria Aluminum SubFraming: The aluminum subframing extrusions used to support the porcelain tiles shall be made of ASTM B221 complying aluminum. extrusions are coated with either alodine treatment or anodized. The Adhesive-bond Qualification: The following tests are necessary to evaluate the performance of the adhesive bonding the porcelain tile to aluminum subframing. Adhesive-bond recognition will be limited to porcelain tile and aluminum subframe used in the qualifying tests. Additional testing may be required for painted surfaces and other finishes. The test specimens must be conducted using the adhesive joint thickness(s) for which recognition is sought Initial Mechanical Strength: The initial mechanical strength of the adhesion of the porcelain tile to the aluminum subframe must be determined in accordance with Section of ETAG-002 and Clauses and of Table 8.3 of ETAG-002. In order to determine allowable tension and shear stress, a safety factor of six shall be applied to the characteristic breaking stress defined in Section 6.1 of ETAG Residual Mechanical Strength: The residual mechanical strength of the adhesion of the porcelain tile to the aluminum subframe must be determined in accordance with Section of ETAG-002 and comply with the

13 Page conditions of acceptance of Clauses , , , and of Table 8.3 of ETAG Structural Silicone Sealant (adhesive): The structural silicone sealant (adhesive) must comply with the requirements in Section of ETAG-002 and Clauses , , , , , , and of Table 8.3 of ETAG Cyclic-load Test: Ten specimens conforming to Figure No. 1 for each adhesive joint thickness shall be cured for 21 days at 73F and 50% relative humidity. One-half of the specimens of each set shall be tension tested as controls to their ultimate tensile strength. The remaining specimens shall be cycled 50 times between 0.5 and 1.0 times the allowable tensile stress for which recognition is sought at a frequency between 0.1 and 2 Hz. Observations of the cycled specimens must be recorded prior to testing to their ultimate strength. The test specimens will be composed of porcelain tile bonded to aluminum subframe with joint thickness representative for which recognition is sought Conditions of Acceptance: The adhesive shall exhibit at least 95 percent of modulus or strength of control specimens. 3.2 MCM Joint Infill Strip: The metal composite material joint infill strip shall comply with the following requirements: Self-ignition temperature of 650 F or greater when tested in accordance with ASTM D Combustibility classification of CC1 when tested in accordance with ASTM D635.

14 Page Flame spread index of 25 or less and smoke-developed index of 450 or less when tested in accordance with ASTM E84 or UL Wall Cladding Assembly Requirements: Transverse Wind Load: Testing shall be conducted on assemblies for which recognition is sought. The positive and negative wind capacity of the wall cladding shall be determined in accordance with Section Temperature Cycling Followed by Gravity Load Test: The porcelain panel shall be able to withstand six times its own weight when tested in accordance with Section Weather-resistive Considerations: Wall cladding assemblies must have a code complying water-resistive barrier in accordance with 2018 IBC and 2015 IBC Section or recognized in an ICC-ES evaluation report, unless assemblies comply with Exception 2 of 2018 IBC Section and 2015 IBC Section Fire-resistance-rated Construction (Optional): Testing shall be performed on the assemblies for which recognition is sought in accordance with ASTM E119 or UL Types I, II, III or IV Construction (Optional): The wall cladding assembly for which recognition is sought must be tested in accordance with NFPA 285. For installations on buildings greater than 40 feet in height, recognition will be limited to the specific water-resistive barrier used in the NFPA 285 testing. For installations on buildings 40 feet in height or less, any recognized water-resistive barrier having a Class A performance as defined in IBC Section is adequate. 4.0 TEST PROCEDURES

15 Page Transverse Wind Load: Procedure: Testing shall be performed in accordance with ASTM E330, Procedure B. A minimum of 3 positive (inward) and 3 negative (outward), load test assemblies shall be tested. The ultimate strength shall be determined as the strength before the first crack of the panels. The load must be applied to the panels. Application of load to ultimate shall consist of at least six increments, with a 10-second load duration for each increment. For cantilever conditions, the movement of the cantilever end shall not be restricted during testing. Maximum deflection readings at the mid-span and end-of cantilever (if applicable) shall be reported. Specimens shall be mounted in a vertical orientation representative of normal installation and support framing shall be attached to the porcelain panels with the applicable fastening system in accordance with the system manufacturer s published installation instructions. The test assemblies shall have a width that is a minimum of twice the maximum spacing of the vertical framing members of the wall cladding system or twice the panel width, whichever is greater, but not less than 4 feet (to ensure a minimum of three vertical framing members in the test assembly). The height of the assembly shall be a minimum of two times the width but not less than eight feet Conditions of Acceptance: Allowable inward and outward wind pressures shall be equal to the average maximum inward and outward load increment achieved, divided by a safety factor of three. No single test result shall vary by more than 15 percent from the average. Otherwise, the lowest result may be used; or additional three tests must be performed and the average of the six test results used. The maximum mid-

16 Page span and end-of-cantilever deflections, at the allowable transverse wind pressure, shall be provided by the testing lab and included in the evaluation report. 4.2 Temperature Cycling Followed by Gravity Load Test: Procedure: The temperature cycling followed by gravity load test shall be conducted on a minimum of three replicate porcelain panel specimens. Test shall be conducted at the minimum and maximum size panel to be recognized in the evaluation report. Prior to load application, the specimens must be subjected to temperature cycling. Temperature cycling shall be conducted with 25 consecutive temperature cycles. Each temperature cycle consist of the following: One hour of water exposure at room temperature, followed by six hours at -40F, followed by two hours at 70F, followed by 14 hours at 180F, and followed by one hour at 70F. A tolerance of +/-5F is allowed on the specified temperatures. Spray nozzles for the water exposure shall be located approximately 7 feet away from the test specimens and shall deliver 6 inches of water per hour at a water temperature of 40 to 60F. The test panel shall be installed vertically. The specified duration for each step within the cycle shall include a transition time between the previous step and the following step; however, total transition time between two adjacent steps shall not exceed 50 percent of the time specified for the current step. After temperature cycling, test loads shall be applied in the gravity load direction, parallel to the surface of the porcelain panel and parallel to the direction gravity. The panel shall be supported in such a manner to allow vertical movement of the porcelain tile and have the aluminum subframe fully supported. The load shall be applied in a manner such that the full load is transferred to the test specimen in not less than 2 seconds and not more than 15 seconds. The applied load shall remain in place for a minimum of 24 hours.

17 Page Conditions of Acceptance: The porcelain tile shall remain attached at the end of the 24 hours. 5.0 QUALITY CONTROL 5.1 The wall cladding system components (porcelain tile, adhesive, framing, and MCM strip) shall be manufactured under an approved quality control program with inspections by ICC-ES or by a properly accredited inspection agency that has a contractual relationship with ICC-ES. 5.2 Quality documentation complying with the ICC-ES Acceptance Criteria for Quality Documentation (AC10) shall be submitted. A qualifying inspection shall be conducted at each manufacturing facility when required by the ICC-ES Acceptance Criteria for Inspections and Inspection Agencies (AC304). 5.3 Ongoing follow-up inspections, by ICC-ES or by a properly accredited inspection agency that has a contractual relationship with ICC-ES, are required under this acceptance criteria. 6.0 EVALUATION REPORT RECOGNITION 6.1 The evaluation report shall include a description of the components of the wall cladding, installation instructions and packaging and labeling information based on requirements in Section 2.1 of this criteria Installation instructions of the wall cladding system as indicated in Section of this criteria Allowable wind load capacities of the wall cladding. A statement indicating the allowable deflection of the framing supporting the porcelain panel.

18 Page Recognition of maximum and minimum wall cladding sizes based on testing in accordance with Section of this criteria When qualified for used in fire-resistance-rated construction and in Types I, II, III or IV construction, a description of the tested assembly (s) and a statement indicating that recognition of use in these types of construction is permitted A statement indicating that a water-resistive barrier must be installed behind the exterior wall cladding A statement indicating that installation of wall assembly must be done by installers approved by the evaluation report holder A statement indicating that the connection of the wall cladding system to the wall framing must be designed by a registered design professional and must not exceed the allowable wind pressures reported in the evaluation report TABLE 1 CODE REFERENCED STANDARD EDITIONS 1 STANDARD 2018 IBC 2018 IRC 2015 IBC 2015 IRC ASTM B ASTM C ASTM D ASTM D ASTM E a ASTM E a ASTM E NFPA n/a 2012 n/a UL 263 UL with revisions through June with revisions through August The standard editions listed above for the 2018 IBC, 2018 IRC, 2015, IBC and 2015 IRC considered technically equivalent for the purposes of this criteria. New report applicants are expected to use the latest edition referenced. 2 The 2018 IBC references the 2017 edition of NFPA 285. The edition date of 2012 under the 2018 IBC is being used as a result of NFPA 285 retracting the 2017 edition

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