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Page 3 of 8 ESR-1190 5.8 The use of the Trex® as a component of a fire- 5.15 Use of deck boards as a walking surface of the means resistance-rated assembly is outside the scope of this of egress is outside the scope of this report. report. ® 5.16 Trex®is produced in Winchester,Virginia,and Fernley, 5.9 Trex® decking shall be gapped to permit adequate Nevada, under a quality control program with drainage in accordance with the manufacturer's inspections by PFS(AA-652). published installation instructions. Trex® shall not be 6.0 EVIDENCE SUBMITTED attached to any solid surface or watertight flooring systems, such as sheathing, waterproof membranes, 6.1 Data in accordance with the ICC-ES Acceptance concrete, roof decks or patios. Criteria for Thermoplastic Composite Lumber Products 5.10 Trex® shall be fastened directly to the supporting (AC109),dated June 2004. construction. At the request of the code official, 6.2 Data in accordance with the ICC-ES Acceptance calculations shall be submitted to confirm that the Criteria for Deck Board Span Ratings and Guardrail construction supporting Trex® has been designed to Systems (Guards and Handrails) (AC174), dated April resist all of the applicable loads. 2002 (editorially revised July 1, 2004; corrected 5.11 The compatibility of the fasteners, metal post mount December 2004). components and other metal hardware with the 7.0 IDENTIFICATION supporting construction, including chemically treated wood, is outside the scope of this report. The Trex® described in this evaluation report shall be identified on each piece with the manufacturer's name and 5.12 Deck boards shall be installed in a minimum of a two- address,the product name, the manufacturing location, the span condition. Deck boards used as stair treads shall name or logo of the inspection agency (PFS) and the be installed in a minimum of a two- or three-span evaluation report number(ESR-1190). condition as indicated in Table 2. Additionally, Trex® shall have the date of manufacture 5.13 The allowable design values for Trex® greater than 3 stamped,labeled or branded into each piece as part of the lot inches thick have not been evaluated and are outside number. the scope of this report. 5.14 The use of Trex®as a handrail has not been evaluated and is outside the scope of this report. TABLE 1—ALLOWABLE DESIGN STRESS VALUES FOR TREX® ASTM PROPERTY ALLOWABLE DESIGN VALUES(psi)''Z'3'4 STANDARD Trex® Trex Trex (Maximum 3-inch 2x2 Baluster TM HS24 Thickness) ASTM D 4761 Flexural stress 250 600 375 ASTM D 198 Tension 250 350 250 ASTM D 476-1 Modulus of elasticity 1.0 x 105 2.0 x 105 1.7 x 105 ASTM D 198 Compression parallel to grain 550 1,000 550 ASTM D 198 Compression perpendicular to grain 625 1,000 625 ASTM D 143 Shear 200 250 200 1, For SI: 1 psi=6.89 kPa, 1 pcf= 16.02 kg/m3,t°C=(t°F-32)5/9. 'Trex®used as decking shall be designed and installed to limit computed deflection under total design load to less than L/360. 2Design values indicated are applicable for uses where temperatures do not exceed 125°F(52°C). 3Trex®has a density of approximately 60 pcf,and Trex 2x2 BalusterTM has a density of approximately 64 pcf. 4The allowable design values for Trex®more than 3 inches(76 mm)thick have not been evaluated and are outside the scope of this report.