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© 2021 IronRidge, Inc.CA Flush Mount System Certification Letter - 2 Hayward, CA 94545 1-800-227-9523 IronRidge.com The parameters and adjustments allowed in the span tables are defined as the following: 1.The Flush Mount System is designed as a Risk Category II structure as defined by ASCE 7-10 Chart 1.5-1. 2. The wind speed selection shall conform to ASCE 7-10 Fig. 26.5-1A (Risk Category II wind) and any state & local county/city amendments to the IBC. No special wind topographic features are included in the span tables and the topographic coefficient (Kzt) is taken as 1.0. 3.The snow load used in the span tables is the ground snow and shall conform to ASCE 7-10 Fig. 7-1 and applicable state & local county/city amendments to the IBC. If the local jurisdiction specified snow load is in the format of a flat roof snow load, it shall first be converted to a ground snow following the local building code/amendment before the application of the attached span tables. No special snow conditions are considered including unbalanced, drifting, sliding, retention, or ponding snow. The span tables do not include buildings which are intentionally kept below freezing, kept just above freezing, or unheated. 4.The span tables reflect the ASCE 7 prescribed earthquake loads with the maximum magnitudes being: 1)For ground snow no greater than 42psf: S s ≤ 2.0g for Site Class A, B, C, or D. 2)For ground snow greater than 65psf: S s ≤ 1.0g for Site Class A, B, C, or D. 3)For ground snow between 42 and 65psf: S s ≤ 1.5g for Site Class A, B, C, or D. 5.Roof zone size and definition conforms to ASCE 7-10 Fig. 30.4-2A to 30.4-2C. 6.Allowable span length in the charts may be multiplied by a factor of 1.08 if the rails are continuous over a minimum of three spans. 7.The maximum rail cantilever length, measured from the rail end to the nearest attachment point, shall be the lesser of the following two conditions: 40% of the allowable span provided for the respective load & configuration condition from the span tables, or 36”. 8.An array to roof clearance of 2” minimum must be provided. 9.No splices are allowed in the rail cantilever. For each XR splice type install per the following requirements: a)XR Bonded Splice cannot be installed in the center 1/3 of interior spans, or the outer 2/3 of end spans. b)BOSS Splice can be installed at any location within a span. 10.Shaded cells of the span tables indicate conditions in which UFO Mid Clamp connection capacity is exceeded. If such conditions are encountered contact support@ironridge.com. 11.When a roof attachment listed in IronRidge’s Flush Mount installation manual is considered, the span values provided in this letter can be adjusted using IronRidge’s online Design Assistant by checking the capacity of the selected roof attachment against the reaction forces provided in Design Assistant. 2314 W San Lorenzo Ave11/17/2023