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Page 2 of 8 ESR-1190 3.3.3 Surface-burning Characteristics: When tested in accordance with this report, the system complies with the accordance with ASTM E 84,Trex®has a flame-spread index structural load requirements specified in the applicable of no greater than 200. building code for lateral load conditions applied to balcony 4.0 DESIGN AND INSTALLATION railings and guardrails. 4.3.2.1 Trex® Railing Assembly: The system covered in 4.1 General: Table 4 is capable of resisting a uniform load of 50 lbs/ft.(730 Installation of Trex® shall comply with this report and the N/m)or a concentrated load of 200 pounds(890 N)applied manufacturer's published installation instructions. The horizontally to the top of the rail.Additionally, the system is manufacturer's published installation instructions shall be capable of withstanding a load of 200 pounds(890 N)applied available at the jobsite at all times during installation.When horizontally over a 1-square-foot(0.093 m2)tributary area of the manufacturer's published installation instructions differ the balusters,and a 200-pound(890 N)concentrated load at from this report,this report shall govern. the top of the post. 4.2 Deck Boards: 4.3.2.2 Trex® Designer Rail Assembly: The system covered in Table 5 is capable of resisting a uniform load of 50 4.2.1 General: Allowable withdrawal and lateral design lbs/ft. (730 N/m)or a concentrated load of 200 pounds(890 values for nails and bolts used as fasteners in Trex®material N)applied horizontally to the top of the rail.Additionally,the shall be determined using the nail and bolt design formula in system is capable of withstanding a load of 50 pounds(222 accordance with the applicable code requirements for solid- N) applied horizontally over a 1-square-foot (0.093 m2) sawn lumber.For purposes of fastener calculation only,Trex® tributary area of the balusters, and a 200-pound (890 N) shall be assumed to have an effective specific gravity of 0.50. concentrated load at the top of the post. There shall be no increases made to the load values indicated in the AF&PA NDS when designing fasteners for 5.0 CONDITIONS OF USE Trex®.Refer to Table 5 of this report for minimum nail spacing distances. Trex®shall be fastened using fasteners with the The Trex® Composite Lumber described in this report following diameters: complies with,or is a suitable alternative to what is specified in,those codes listed in Section 1.0 of this report,subject to a. Nails having diameters less than or equal to 16d common the following conditions: wire[0.162 inch(4 mm)] 5.1 Trex®shall not be used as a component of trusses or b. Screws having diameters less than or equal to No. 12 structural diaphragms,and shall not be used in framing [0.216 inch(5.5 mm)] applications for joists, rafters, studs, beams, columns, c. Bolts having diameters less than or equal to 1/2 inch(12.7 or posts. mm) 5.2 The design and installation of Trex® shall be in 4.2.2 Structural: accordance with this report and the manufacturer's published installation instructions. 4.2.2.1 Deck Boards: Table 1 lists the allowable stress values for Trex® lumber, Trex® 2x2 BalusterTM and Trex® 5.3 When Trex®is used in guardrail assemblies,information HS24 lumber. These values shall not be adjusted by any of shall be submitted to the code official to verify the adjustment factors permitted for wood framing by the compliance with Tables 4 and 5 of this report. When AF&PA NDS or applicable code, with the exception that required by the applicable code or the code official, increases for load duration shall be permitted.The allowable such documents shall be prepared,signed and sealed, stress values are applicable in uses up to a temperature of and submitted by a registered design professional in 125°F(52°C). accordance with the registration laws of the state in which the project is located. Table 3 lists allowable spans for Trex® used as planking (flatwise bending). This table shall be used for determining 5.4 The maximum design stresses for Trex®, Trex® HS24 the maximum allowable span ofTrex®used as decking unless and Trex 2x2 BalusterTM shall comply with those listed the user/designer submits structural calculations to the code in Table 1.The maximum spans of decking shall comply official for approval of additional span lengths using the with Table 3 unless structural calculations, in design values indicated in Table 1. accordance with Table 1, are provided. Guardrail assemblies shall comply with Tables 4 and 5. 4.2.2.2 Deck Boards Used as Stair Treads:Trex®2-inch- by-6-inch (51 mm by 152 mm)and 2-inch-by-8-inch (51 mm The design values listed in Tables 1, 2 and 3 of this by 203 mm)composite lumber,when used as a stair tread,is report are for loads of normal duration and are satisfactory to resist the code-prescribed concentrated load applicable to either dry or wet conditions of use.There of 300 Ibf(1.33 kN)when installed at a maximum center-to- shall not be any allowable design stress increases center spacing of 12 inches (305 mm), and shall have a permitted by the applicable code or the AF&PA NDS, minimum of three continuous spans over four supports.Trex® with the exception that increases for load duration,such 5/4-inch-by-6-inch (32 mm by 152 mm) composite lumber, as due to impact,shall be permitted.The design values when used as a stair tread, is satisfactory to resist the code- are applicable in uses up to a temperature not prescribed concentrated load of 300 lbf (1.33 kN) when exceeding 125°F(52°C). installed at a maximum center-to-center spacing of 10.5 5.5 Allowable capacity of fasteners installed in Trex®shall inches (267 mm), and shall have a minimum of two comply with Section 4.2.1 of this report. continuous spans over three supports. 4.3 Guardrail System: 5.6 Trex®used as decking shall be designed and installed to limit bending deflection under total design load to less 4.3.1 General:Fasteners used to construct guardrails shall than or equal to L/360. comply with the footnotes of Tables 4 and 5. 5.7 Trex®shall be limited to use with building types where 4.3.2 Structural: Tables 4 and 5 indicate material and the use of combustible material is permitted.Trex®shall installation requirements for the Trex®Railing Assembly and not be used as a component of heavy timber the Trex® Designer Rail Assembly. When installed in construction.