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L U M'1'0 Im Engineering Alliance, Inc ® Engineering Alliance, Inc h ttps://www.eng-all iance.com https://www.eng-alliance.com 08-August-2023 Components and Cladding Roof Zones: The Components and Cladding Roof Zones shall be determined based on ASCE 7-10&7-16 Component and Cladding design. Unirac 1411 Broadway Blvd. NE Notes: 1. U-Builder 2.0 Online tool analysis is only for Unirac NXT UMOUNT systems and do not include Albuquerque,NM 87101 roof capacity check. Tel:505 242 6411 2. Risk Category I I per ASCE 7-16. 3. Topographic factor,kzt is 1.0. VERSION Attn.: Engineering Department 4. Array Edge Factor YE=1.5 DESCRIPTION DATE REV 5. Average parapet height is 0.0 ft. INITIAL RELEASE 0914/2023 UR Subject: Engineering Certification for the Unirac NXT UMOUNT System to Support Photovoltaic Panels. 6. Wind speeds are LRFD values. 7. Attachment spacing(s)apply to a seismic design category E or less. The Unirac NXT UMOUNT Flush-to-Roof is an extruded aluminum rail system that is engineered to hold most framed solar modules to a roof structure and installed parallel to the roof surface. Design Responsibility: We have reviewed the NXT UMOUNT system, a proprietary mounting system for rooftop solar photovoltaic (PV) panels The U-Builder 2.0 design software is intended to be used underthe responsible charge of a registered design professional where installation,and the U-Builder 2.0 Online tool.This U-Builder 2.0 software includes analysis for the NXT UMOUNT rail and NXT required by the authority having jurisdiction. In all cases,this U-Builder 2.0 software should be used under the direction of a UMOUNT hardware.All information,data,and analysis are in compliance with the following codes,city ordinances,and typical design professional with sufficient structural engineering knowledge and experience to be able to: specifications: •Evaluate whether the U-Builder 2.0 Software is applicable to the project,and Codes: 1. 2015-2018 Washington State Building Code. • Understand and determine the appropriate values for all input parameters of the U-Builder 2.0 software. 2. ASCE/SEI 7-10,7-16 Minimum Design Loads for Buildings and Other Structures. 3. International Building Code,2015-2018 Edition w/Provisions from SEAOC PV-2 2017. This letter certifies that the Unirac NXT UMOUNT system,when installed according to the U-Builder 2.0 engineering report 4. International Residential Code,2015-2018 Edition w/Provisions from SEAOC PV-2 2017. and the manufacture specifications,is in compliance with the above codes and loading criteria. 5. AC428, Acceptance Criteria for Modular Framing Systems Used to Support Photovoltaic (PV) Panels, PROJECT NAME November 1,2012 by ICC-ES. This certification excludes evaluation of the following components: O 6. Aluminum Design Manual 2015&2020 Edition. 1)The structure to support the loads imposed on the building by the array;including,but not limited to:strength and N deflection of structural framing members,fastening and/or strength of roofing materials,a nd/or the effects of snow Q O The following are typical specifications to meet the above code requirements: accumulation on the structure. CO O I-- Cfl 2)The attachment of the NXT UMOUNT Rails to the existing structure. w O ~ 00O Design Criteria: Ground Snow Load=0 100(psf) 3)The capacity of the solar module frame to resist the loads. > 0 RO Basic Wind Speed=95-190(mph) cna o o � w 0- Roof Mean Height=0-60(ft) This requires additional knowledge of the building and is outside the scope of the certification of this racking system. CV Roof Pitch=0'-45* Q a 0) � O LJ J Exposure Category=B,C&D Please feel free to call for any questions or clarifications. Q z 00 z LL) Attachment Spacing: Per U-Builder 2.0 Engineering report. w > c O 2i Prepared By - O Cantilever: The maximum rail cantilever length is 1/3 of the adjacent span. Q Ln O J _ z Engineering Alliance,Inc 3 O W U Clearance: 2"to 10"clear from the top of the roof to the top of the PV panel. Sugar Land,TX OpM.. CO 0� z ~ U WA%y N j Q Q LU Tolerance(s): 1.0"tolerance for any specified dimension in this report is allowed for installation. �v op%. 2�•: c a: LU 0 Installation Orientation: See NXT UMOUNT Installation Guide. v �? Landscape-PV Panel long dimension is parallel to ridge/eave line of the roof and the PV panel is �0.C'�•;P 51947,0:' mounted on the long side. S�ONAI-EN Portrait- PV Panel short dimension is parallel to ridge/eave line of the roof and the PV panel is � / SHEET NAME mounted on the short side. i �L 08-AU 2023 SPEC SHEETS EXP.:15-DEC-2023 4603 April Meadow Way,Sugar Land,TX 77479. Ph:832 865 4757 4603 April Meadow Way,Sugar Land,TX 77479. Ph:832 865 4757 SHEET SIZE ANSI B 11" X 17" SHEET NUMBER PV-17