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<br />ENGINEERS
<br />January 12, 2022
<br />Unirac
<br />1411 Broadway Blvd. NE
<br />Albuquerque, NM 87102
<br />Attn.: Unirac- Engineering Department
<br />Re: Engineering Certification for the Unirac U-Builder 2.0 SOLARMOUNT Flush Rail
<br />PZSE, Inc. - Structural Engineers has reviewed the Unirac SOLARMOUNT rails, proprietary mounting system constructed
<br />from modular parts which is intended for rooftop installation of solar photovoltaic (PV) panels; and has reviewed the U-
<br />builder Online tool. This U-Builder software includes analysis for the SOLARMOUNT LIGHT rail, SOLARMOUNT
<br />STANDARD rail, and SOLARMOUNT HEAVY DUTY rail with Standard and Pro Series hardware. All information, data and
<br />analysis contained within are based on, and comply with the following codes and typical specifications:
<br />1. Minimum Design Loads for Buildings and other Structures, ASCE/SEI 7-05, ASCE/SEI 7-10, ASCE/SEI 7-16
<br />2. 2006-2018 International Building Code, by International Code Council, Inc. w/ Provisions from SEAOC PV-2 2017
<br />3. 2006-2018 International Residential Code, by International Code Council, Inc. w/ Provisions from SEAOC PV-2
<br />2017.
<br />4. AC428, Acceptance Criteria for Modular Framing Systems Used to Support Photovoltaic (PV) Panels, November
<br />1, 2012 by ICC-ES.
<br />5. 2015 Aluminum Design Manual, by The Aluminum Association, 2015
<br />Following are typical specifications to meet the above code requirements:
<br />Design Criteria: Ground Snow Load = 0 - 100 (psf)
<br />Basic Wind Speed = 85 - 190 (mph)
<br />Roof Mean Height = 0 - 60 (ft)
<br />Roof Pitch = 0 - 45 (degrees)
<br />Exposure Category = B, C & D
<br />Attachment Spacing: Per U-builder Engineering report.
<br />Cantilever:
<br />Maximum cantilever length is L/3, where "L" is the span noted in the U-Builder online
<br />tool.
<br />Clearance:
<br />2" to 10" clear from top of roof to top of PV panel.
<br />Tolerance(s):
<br />1.0" tolerance for any specified dimension in this report is allowed for installation.
<br />Installation Orientation:
<br />See SOLARMOUNT Rail Flush Installation Guide.
<br />Landscape - PV Panel long dimension is parallel to ridge/eave line of roof and the PV
<br />panel is mounted on the long side.
<br />Portrait - PV Panel short dimension is parallel to ridge/eave line of roof and the PV panel
<br />is mounted on the short side.
<br />1478 Stone Point Drive, Suite 190, Roseville, CA 95661
<br />916.961.3960 916.961,3965 wvvw.pzse.cori I 1 of 2
<br />P/
<br />strUCtural
<br />ENGINEERS
<br />Components and Cladding Roof Zones:
<br />The Components and Cladding Roof Zones shall be determined based on ASCE 7-05, ASCE 7-10 & 7-16 Component and
<br />Cladding design.
<br />Notes: 1) U-builder Online tool analysis is only for Unirac SM SOLARMOUNT Rail Flush systems only and do not
<br />include roof capacity check.
<br />2) Risk Category II per ASCE 7-16.
<br />3) Topographic factor, kzt is 1,0.
<br />4) Array Edge Factor YE = 1.5
<br />5) Average parapet height is 0.0 ft.
<br />6) Wind speeds are LRFD values.
<br />7) Attachment spacing(s) apply to a seismic design category E or less.
<br />Design Responsibility:
<br />The U-Builder design software is intended to be used under the responsible charge of a registered design professional
<br />where required by the authority having jurisdiction. In all cases, this U-builder software should be used under the
<br />direction of a design professional with sufficient structural engineering knowledge and experience to be able to:
<br />Evaluate whether the U-Builder Software is applicable to the project, and
<br />Understand and determine the appropriate values for all input parameters of the U-Builder software.
<br />This letter certifies that the Unirac SM SOLARMOUNT Rails Flush, when installed according to the U-Builder engineering
<br />report and the manufacture specifications, is in compliance with the above codes and loading criteria.
<br />This certification excludes evaluation of the following components:
<br />1) The structure to support the loads imposed on the building by the array; including, but not limited to: strength
<br />and deflection of structural framing members, fastening and/or strength of roofing materials, and/orthe effects
<br />of snow accumulation on the structure.
<br />2) The attachment of the SM SOLARMOUNT Rails to the existing structure.
<br />3) The capacity of the solar module frame to resist the loads.
<br />This requires additional knowledge of the building and is outside the scope of the certification of this racking system.
<br />If you have any questions on the above, do not hesitate to call,
<br />Prepared by:
<br />PZSE, Inc. —Structural Engineers
<br />Roseville, CA
<br />DIGITALLY SIGNED
<br />EXPIRES 08/02/2023
<br />1478 Slone Point Drive, Suite 190, Roseville, CA 95661
<br />916.961,3960 916.961.3965 www.pzse.cori I 2 of 2
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<br />SMART ENERGY TODAY
<br />(SET)
<br />1550 DIGITAL DR, LEHI, UT
<br />84043, USA
<br />SYSTEM INFO
<br />(16) Q CELLS
<br />Q.PEAK DUO BLK ML-G10+
<br />(400W )
<br />(16) ENPHASE
<br />IQ8PLUS-72-2-US (240V)
<br />DC SYSTEM SIZE: 6.400 kWDC
<br />AC SYSTEM SIZE: 4.800 kWAC
<br />REVISIONS
<br />DESCRIPTION I DATE IREV
<br />PROJECT NAME & ADDRESS
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<br />DATE: 12/6/2022
<br />SHEET NAME
<br />EQUIPMENT
<br />SPECIFICATIONS
<br />SHEET SIZE
<br />ANSI B
<br />11" X 17"
<br />SHEET NUMBER
<br />PV-21
<br />
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