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Home My WebLink AboutSTRUCTURAL CALCULATIONS - 19-00080 - 1175 Widdison Ln - Solar PanelsRSTRUCTURAL CALCULATIONS FOR NEW ROOF-TOP SOLAR PANELS AT 1175 Widdison Lane Rexburg City, ID 83440 AHJ = Rexburg City ELECTRONIC CERTIFICATION This seal covers the analysis of the existing structure and attachment of the new solar panels to it. PE Certifies that it will adequately support its own weight and the weight added to it by the new solar panels. If structural retrofits are required, then they are specified on the certified plans – see PV3 & PV4. This document has been certified electronically using a digital identification certificate unique to the signer, issued by a Certificate Authority approved by Adobe (AATL) & compatible with Bluebeam & other common PDF editors (but not preview windows). It satisfies the requirements of NIST DSS (FIPS 186-4) PREPARED FOR Jolynn, Tai 58822395 Digitally signed by Ryan Hillstrom, PE Date: 2019.02.13 22:10:05 -07'00' Engineering Department | 1220 South 630 East #430 | American Fork, UT 84003 | (385) 498-6700 | Page 1 of 1 TABLE OF CONTENTS EXECUTIVE SUMMARY Project Information, Structure Type & Condition .............................................. Page 1 Building Code & Referenced Standards ........................................................... Page 1 Structural Design Criteria (snow, wind & seismic hazards)...............................Page 1 Conclusion / Results of Structural Analysis ....................................................... Page 1 STATEMENT OF SITE SURVEY ............................................................................ Page 1 STATEMENT OF PROFESSIONAL CERTIFICATION ........................................... Page 1 STRUCTURAL INFORMATION Structural Schematic ......................................................................................... Page 2 Mounting Planes (MP) & Solar Panel (PV) Configuration ................................. Page 2 STRUCTURAL DESIGN LOADS Dead Loads ...................................................................................................... Page 3 Live Loads ........................................................................................................ Page 3 Snow Loads ...................................................................................................... Page 4 Wind Loads ....................................................................................................... Page 5 STRUCTURAL ANALYSIS Scope of Work .................................................................................................. Page 6 Qualification Method / Procedure ...................................................................... Page 6 Qualification Checks – Gravity Loads ............................................................... Page 6 Recommended Upgrades ................................................................................. Page 6 Qualification Checks – Lateral Loads ................................................................ Page 7 Attachment of New PV Standoffs to Existing Structure ..................................... 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%DVH9DOXHV =SDC “D”[[]] 6HLVPLF'HVLJQ&DWHJRU\ &KHFN'HVLJQ/RDG&DVH( $OO03 V5RRI=A r 2520 ft 2 ≔Drt =⋅max ⎛⎝Dr⎞⎠Ar 35.3 kip )ORRUV≔A f ⋅⎛⎝-X s ⋅2.0 le⎞⎠⎛⎝-Ys ⋅2.0 le⎞⎠ ≔Dft =⋅⋅⎛⎝-ns 1⎞⎠Df Af 0.0 kip :DOOV≔A w ⋅⋅⎛⎝+⋅2.0 ⎛⎝-Xs ⋅2.0 le⎞⎠⋅2.0 ⎛⎝-Ys ⋅2.0 le⎞⎠⎞⎠ns Zs ≔Dwt =⋅Dw Aw 18.0 kip 39≔Dpvt =⋅⎛ ⎜⎝ +++++npv1 npv2 npv3 npv4 n pv5 npv6 ⎞ ⎟⎠ W pvi 0.5 kip &KHFN'HVLJQ/RDG&DVH=――――― Dpvt ++Drt Dft D wt %1 3DVV∴ ŶŐŝŶĞĞƌŝŶŐĞƉĂƌƚŵĞŶƚ ͮϭϮϮϬ^ŽƵƚŚϲϯϬĂƐƚηϰϯϬͮŵĞƌŝĐĂŶ&ŽƌŬ͕hdϴϰϬϬϯͮ;ϯϴϱͿϰϵϴͲϲϳϬϬͮWĂŐĞϳ &KHFN39$WWDFKPHQWWR([LVWLQJ6WUXFWXUHV &KHFN'HVLJQ/RDG&RPELQDWLRQ': 3Qϕ 1HW8SOLIW#HDFK6WDQGRII 1RPLQDO/DJVFUHZ&DSDFLW\ ≔ϕls 1.0 ≔Pls ⋅250.0 ――lbf in =Wnet 511.5 511.5 511.5 511.5 511.5 511.5 ⎡ ⎢ ⎢ ⎢ ⎢ ⎢ ⎢⎣ ⎤ ⎥ ⎥ ⎥ ⎥ ⎥ ⎥⎦ lbf ≔dls ⋅―5 16 in ≔lls ⋅2.5 in ≔ϕPls =⋅Pls lls 625.0 lbf 3DVV∴ ∴8VH/DJVFUHZZPLQLPXPHPEHGPHQW ŶŐŝŶĞĞƌŝŶŐĞƉĂƌƚŵĞŶƚ ͮϭϮϮϬ^ŽƵƚŚϲϯϬĂƐƚηϰϯϬͮŵĞƌŝĐĂŶ&ŽƌŬ͕hdϴϰϬϬϯͮ;ϯϴϱͿϰϵϴͲϲϳϬϬͮWĂŐĞϴ ASCE 7 Hazards Report Address: Rexburg Idaho, Standard:ASCE/SEI 7-10 Risk Category:II Soil Class:D - Stiff Soil Elevation:4869.12 ft (NAVD 88) Latitude: Longitude: 43.82607 -111.78309 Wind Results: Data Source: Date Accessed: Wind Speed: 115 Vmph 10-year MRI 76 Vmph 25-year MRI 84 Vmph 50-year MRI 90 Vmph 100-year MRI 96 Vmph ASCE/SEI 7-10, Fig. 26.5-1A and Figs. CC-1–CC-4, incorporating errata of March 12, 2014 Thu Feb 07 2019 Value provided is 3-second gust wind speeds at 33 ft above ground for Exposure C Category, based on linear interpolation between contours. Wind speeds are interpolated in accordance with the 7-10 Standard. Wind speeds correspond to approximately a 7% probability of exceedance in 50 years (annual exceedance probability = 0.00143, MRI = 700 years). Site is not in a hurricane-prone region as defined in ASCE/SEI 7-10 Section 26.2. Mountainous terrain, gorges, ocean promontories, and special wind regions should be examined for unusual wind conditions. Page 1 of 3https://www.asce7hazardtool.online/Thu Feb 07 2019 SS : 0.445 S1 : 0.157 F a : 1.444 F v : 2.172 SMS : 0.643 SM1 : 0.341 S DS :0.428 S D1 :0.227 T L :6 PGA : 0.157 PGA M :0.233 F PGA :1.486 Ie :1 Design Response SpectrumDesign Response Spectrum S (g) vs T(s)a MCE Response SpectrumRMCE Response Spectrum S (g) vs T(s)a Seismic Site Soil Class: Results: Seismic Design Category D - Stiff Soil D Data Accessed: Date Source: Thu Feb 07 2019 USGS Seismic Design Maps based on ASCE/SEI 7-10, incorporating Supplement 1 and errata of March 31, 2013, and ASCE/SEI 7-10 Table 1.5-2. Additional data for site-specific ground motion procedures in accordance with ASCE/SEI 7-10 Ch. 21 are available from USGS. Page 2 of 3https://www.asce7hazardtool.online/Thu Feb 07 2019 Snow Results: Elevation: 4869.1 ft Data Source: ASCE/SEI 7-10, Fig. 7-1. Date Accessed: Thu Feb 07 2019 In "Case Study" areas, site-specific case studies are required to establish ground snow loads. Extreme local variations in ground snow loads in these areas preclude mapping at this scale. Ground snow load determination for such sites shall be based on an extreme value statistical analysis of data available in the vicinity of the site using a value with a 2 percent annual probability of being exceeded (50-year mean recurrence interval). Values provided are ground snow loads. In areas designated "case study required," extreme local variations in ground snow loads preclude mapping at this scale. Site-specific case studies are required to establish ground snow loads at elevations not covered. The ASCE 7 Hazard Tool is provided for your convenience, for informational purposes only, and is provided “as is” and without warranties of any kind. The location data included herein has been obtained from information developed, produced, and maintained by third party providers; or has been extrapolated from maps incorporated in the ASCE 7 standard. While ASCE has made every effort to use data obtained from reliable sources or methodologies, ASCE does not make any representations or warranties as to the accuracy, completeness, reliability, currency, or quality of any data provided herein. Any third-party links provided by this Tool should not be construed as an endorsement, affiliation, relationship, or sponsorship of such third-party content by or from ASCE. ASCE does not intend, nor should anyone interpret, the results provided by this Tool to replace the sound judgment of a competent professional, having knowledge and experience in the appropriate field(s) of practice, nor to substitute for the standard of care required of such professionals in interpreting and applying the contents of this Tool or the ASCE 7 standard. In using this Tool, you expressly assume all risks associated with your use. Under no circumstances shall ASCE or its officers, directors, employees, members, affiliates, or agents be liable to you or any other person for any direct, indirect, special, incidental, or consequential damages arising from or related to your use of, or reliance on, the Tool or any information obtained therein. To the fullest extent permitted by law, you agree to release and hold harmless ASCE from any and all liability of any nature arising out of or resulting from any use of data provided by the ASCE 7 Hazard Tool. Page 3 of 3https://www.asce7hazardtool.online/Thu Feb 07 2019