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NXT UMOUNT U-BUILDER PRODUCT ASSUMPTIONS <br />Limitations of Responsibility: It is the user’s responsibility to ensure that inputs are correct for your specific project. <br />Unirac is not the solar, electrical, or building engineer of record and is not responsible for the solar, electrical, or building design for this <br />project. <br />Building Assumptions <br />1. Building Risk Category II for ASCE 7-10, and I, II, III or IV for ASCE 7-16. <br />2. Mean Roof Height = 0 – 60 ft unless otherwise specified. <br />3. Roof Pitch: 5° - 45° for ASCE 7-10 and 9° - 45° for ASCE 7-16 <br />Wind Design Assumptions <br />1. Exposure Category B, C, or D <br />2. Basic Wind Speed 95 – 190 mph for ASCE 7-10, and 85-190 mph for ASCE 7-16. <br />3. Wind speeds are LRFD values <br />4. γE = 1.0 for ‘Interior’ spans, γE = 1.5 for ‘Exposed’ spans (ASCE 7-16 Sec. 29.4.3, Fig. 29.4-7) <br />Snow and Seismic Design Assumptions <br />1. Ground Snow Load = 0-100 psf <br />2. Thermal Factor = 1.0 <br />3. Results based on uniform snow load <br />4. 0.2-s Spectral Response Acceleration, SS ≤ 3 <br />Array Assumptions <br />1. Dead Load ≤ 5 psf (including PV Modules and Racking) <br />2. Module orientation and Rail direction per user selection <br />3. Module height above roof surface 5” to 10” depending on attachment type <br />4. Gaps between module rows and columns is 0.25”-1.0” <br />5. Modules are parallel to the roof surface and within 10 in. of it. <br />6. ‘Exposed’ spans shall be used when any part of an exposed module or panel as is attributed to that span. <br />7. The most restrictive of all roof zone spans shall be used when any part of the module is attributed to that span. <br />Intermediary Span Distances: Roof attachment point loads be reduced linearly if the installed distance between the attachments is less <br />than the selected span. For example, if the spacing is half the amount shown in the results, then the point loads may also be reduced by <br />half. <br />Spans greater than 72 in.: While our products are valid for greater spans in many instances, we do not recommend this mounting <br />configuration. Typical residential roofs are not designed for the larger point loads that might result from such excessive spans and we <br />recommend final design by a licensed professional engineer of responsible charge. <br />1113 S Shelley St <br />01/25/23