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© 2021 IronRidge, Inc. QuickMount L-Mount with Open-End Slot Certification Letter - 2 28357 Industrial Blvd Hayward, CA 94545 1-800-227-9523 www.IronRidge.com Table 1 Footnotes: (1) Table values apply to QuickMount L-Mount with open-end slot. (2) Capacities apply to rafter size of 2x4, a deck thickness of 7/16" or greater, and lag screws or structural screws secured within the center 1/3 of rafter width with a minimum 2.5” end distance. Rafters should be in sound structural condition with no sign of rot or decay. (3) The uplift direction is the upward direction perpendicular to the roof surface. (4) The allowable lateral capacity is applicable to the lateral loads parallel or perpendicular to the rafter and to the L-foot orientations when the vertical face of the L-foot is normal to the rafter or perpendicular to the rafter. The minimum required rafter specific gravity for the lateral capacity is 0.40. (5) Deviation reflects the variance of the highest or the lowest test value from the group mean for the respective load direction. (6) Safety Factor is associated with the respective failure modes recorded and determined per NDS-2018 or ASTM-7147. (7) Allowable capacity is equal to Average Peak/Yield Load at Failure divided by its associated Safety Factor. (8) The uplift allowable capacity in Table 1 applies to rafters with a specific gravity (G) of 0.50 or higher. For a wood species with specific gravity lower than 0.50 the allowable uplift capacity shall be adjusted by a factor of �𝐺𝐺 0.50� 3 2 per National Design Specification (NDS-2018) Eq. (12.2-1). Results of common wood species are adjusted and provided in Table 2 below. Sincerely, Gang Xuan, SE Senior Structural Engineer Load Direction Test Quantity Average Peak Load at Failure (lbs) Deviation of Test Results (5)Critical Failure Mode Safety Factor (6) Allowable Capacity (lbs) (7) Uplift (lag screw) (3)(8)5 2693 6.9% Lag screw pull-out 3.0 898 Uplift (structural screw)(3)(8) 5 2344 2.8%Structural screw pull out 3.0 781 Lateral (4) 5 425 5.9%L-foot vertical leg yielding 1.65 258 Table 1: QuickMount L-Mount Allowable Capacities (1)(2) Wood Species Specific Gravity of Chosen Rafter (G) Allowable Uplift Capacity with Lag Screw (lbs) Allowable Uplift Capacity with Structural Screw (lbs) Douglas Fir-South 0.46 792 689 Hem-Fir (North)0.46 792 689 Hem-Fir 0.43 716 623 Spruce-Pine-Fir 0.42 691 602 Table 2: QuickMount L-Mount Allowable Uplift Capacities for Rafters with G Less Than 0.50 2021.03.08 14:47:19 -08'00' 11.0.23 417 S Clara St #2 04/17/23