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HomeMy WebLinkAboutLA197967 Approved PlansSPEC NOTES [1] 380 WATT PV MODULES AND MICROINVERTERS [2] PV UTILITY AC DISCONNECT NEMA 3R [4] MAIN LOAD CENTER 200 AMP MAIN BREAKER [5] UTILITY METER 90 120 150 180 210 240 270 300 330 0 30 60 W E S N 80 70 50 4O 2010350 320 310 290 280 260 250 230 220 200 190 170 160 140 130 110 100 340 24/7 unescorted keyless access for main meter, pv utility disconnect and pv meter. 3 5 UNDERGROUND SERVICE - NO CLEARANCE ISSUES 2 [3] PV COMBINING SUB PANEL 4 PROJECT NAME: B. MAKI BLAINE, MN 55449 9133 DAVENPORT ST NEBMAKI@LIVEWIREGUYS.COM 612-749-3923ELECTRIC SERVICES, LLC. LIVE WIRE DATE: 11-11-21 REV: 01 Farmington, MN, 5502413.68 KW AC SOLAR PV - SITE DIAGRAM GALERY DR. ~125' WLaurie Johnson - (612) 987-3018 - lauriej@pcdevelopmint.com PV UTILITY AC DISCONNECT READILY ACCESSIBLE AND LOCKABLE 6 [6] SOLAR PRODUCTION METER FORTUNE TRAIL GAGE AVE ~450' W17714 Fortune Trail 1 1 1 1 1 1 1 1 1 111111111111111FORMOSA DR. ~280' S3'-7"2'-8"2X4 ENGINEERED TRUSSES 24" O.C. 1 1 1 1111 1 1 111 3'-4" 3'-1" 3'4'-3"Concept Approval ONLY Subject to Field Inspection Inspector Date 2020 MN Bldg Code 11/30/2021dmathews 2 INVERTER OUTPUT CIRCUIT STRINGS SOURCE CIRCUIT CONDUCTOR AND CONDUIT SCHEDULE (DC) DESCRIPTION NOTESCOND FILLCONDUITGND SIZEWIRE TYPEWIRE SIZEFUSE (A)NOM WATTImp (A)Imax (A)Vmp (V)Vmax (V)# IN SERIESID IRONRIDGE XR100 RAILS WIRE TYPECONT. AC POWER (W) AC CONDUCTOR AND CONDUIT SCHEDULE DESCRIPTION ID NOM VAC MAX AMP O.C. SIZE WIRE SIZE CONDUITGND SIZE COND FILL NOTES SPEC NOTES [2] IRONRIDGE XR1000 UL LISTED RACKING ASSEMBLY USE GROUNDING METHODS PER MANUFACTURER'S INSTALLATION REQUIREMENTS. COPPER WIRE WILL GROUND ALL OTHER EQUIPMENT AND SHALL TERMINATE IN INVERTER CABINET. [3] NEMA3R JUNCTION BOX CONDUIT RUNS TO CONTAIN APPRORIATE EXPANSION JOINTS. COMBINING LOAD CENTER MICRO INVERTERS TO COMBINER DISCONNECT [6] #12 AWG DERATED FOR TEMP AND CONDUCTOR FILL = AMPACITY OF 20 AAC WITH 6 CCC, Vdrop = 0.69% FOR 100 FEET 240 20A #12 AWG THHN #12 AWG TBDB PARTIALLY FREE AIR ON ROOF - PV WIRE ONLY - BLACK AND RED WIRING DIAGRAM IS DIAGRAMMATIC ONLY AND DOES NOT REFLECT FIELD CONDITIONS. [1] [2] [3] [7] ENPHASE ENVOY MONITORING - WIRELESS CONNECTION TO ROUTER [5] ENPHASE MICRO INVERTER MAX OUTPUT CURRENT = 1.45A/MICRO, MAX SHORT CIRCUIT INPUT CURRENT = 15A, Vmax = 58VDC NEC (NATIONAL ELECTRIC CODE) 2020 REFERENCED [7] NA NA A NO LOADS TO BE SERVED BOND (N) EGC/GEC TO GROUNDGND LOADS200A MAIN BREAKER 240/120V 200A SERVICE 200A BUS BARNN200A MAIN (IV) (V) PV SYSTEM CONNECTED BI-DIRECTIONAL NET METER120/240VSINGLE PHASE 3 WIRE 200 AMP SELF CONTAINED WITH BYPASS LOAD LINE DAKOTA ELECTRIC AREA EPS - ALL LABELS WEATHERPROOF, DURABLE AND PERMANENTLY MOUNTED. NEC 2020 COMPLIANTSEE ATTACHED LABELING DETAILS NEC (NATIONAL ELECTRIC CODE) 2020 REFERENCED C (III)(II) AND READILY ACCESSIBLE VISIBLE BLADES, LOCKABLE CHD DG222NRB 2 POLE FUSIBLE DISCONNECT FUSED AT 70 AMPS 120/240 VAC PV SYSTEM UTILITY AC DISCONNECT POINT OF INTERCONNECTION (LINE SIDE CONNECTION WITH DUAL LUGS)THIS IS A SECONDARY INTERCONNECTION [5] ENVOY D E MICRO INVERTERS TO COMBINER DISCONNECT C 20A #12 AWG THHN #12 AWG TBD TBD [4] ROUTER 20 A 2 POLE BREAKERS BLAINE, MN 554499133 DAVENPORT ST NEBMAKI@LIVEWIREGUYS.COM612-749-3923ELECTRIC SERVICES, LLC.LIVE WIRE PROJECT NAME:B. MAKIDATE: 10-19-21REV: 01Laurie Johnson - (612) 987-3018 - lauriej@pcdevelopmint.comFarmington, MN, 5502417714 Fortune Trail240 NLOAD LINE PV PRODUCTIONMETER (VI)MILB U4801-XL-5T9120/240V SINGLE PHASE 3 WIRE 200 AMP SELF CONTAINEDWITH BYPASS ~1' TO UTILITY METERUTILITY OWNERSHIP [4] ENPHASE IQ7A-72-2-US MICRO INVERTERS (240V) GRID TIED - UL LISTED SINGLE PHASE MICRO INVERTERS, COMPLIES WITH UL1741 240 VAC SINGLE PHASE ENPHASE MICROINVERTERS - INVERTER'S COMPLY WITH UL 1741 [1] SILFAB 380 WATT MONOCRYSTALLINE MODULES, Vmpp = 38.88VDC, Impp = 9.79, Voc = 45.13, Isc = 10.50, Voc(temp) = 51.8 VDC@-28 deg C WITH MC4 COMPATIBLE CONNECTORS. DO NOT DISCONNECT CONNECTORS UNDER LOAD. #12 AWG PV #6 AWG SILFAB 380 WATT MODULES A 1 51.8 38.88 10.50 9.79 380TO IQ7A MICROINVERTER 15 14.309 KW AC SOLAR PV - ELECTRICAL SCHEMATIC DISTANCES BETWEEN EQUIPMENT (FT) (2) (2)(3)(4)(5) (3) (4) (5) 2 4 3 2 1 3 4 1 1 2 3 1 (6) (6) 1 1 2 1 1 1 2 1 1,745 7.3 3,141 13.1 REFERENCE POINT OF APPLICABILITY (RPA) DESIGN MEETS CURRENT NEC REQUIREMENTS THIS IS A SECONDARY INTERCONNECTION (9) ENPHASE MICROINVERTERS STRING 3 (11) ENPHASE MICROINVERTERS STRING 1 & 2 E D 240 THHN TBD +-+-+-+-+-+-+-+-+-+- SURGE ARRESTORMAIN LUG 240/120V 80A 80A BUS BAR +- -+-+-++--+ B + +- -+-+-++--++--+-++---+ + +- -+-+-++--++--+-++---+ (5) ENPHASE MICROINVERTERS STRING 4 ENPHASE COMBINER 3 E 240 THHN #6 AWG 1 GNDTBD3 COND AC NEUTRAL PASSES THROUGH FROM COMBINER TO SERVICE NEUTRAL 12,564 52.3 70A #4 AWG CUCOMBINER TO PV UTILITY AC DISCO AND UTILITY METERS MICRO INVERTERS TO COMBINER DISCONNECT 3,839 16.0 20A #12 AWG #12 AWG DUAL LUGS K4977EXT FOR INTERCONNECTION IN METER SOCKET The high-powered smart grid-ready Enphase IQ 7A Micro™ dramatically simplifies the installation process while achieving the highest system efficiency for systems with 60-cell and 72-cell modules. Part of the Enphase IQ System, the IQ 7A Micro integrates with the Enphase IQ Envoy™, Enphase IQ Battery™, and the Enphase Enlighten™ monitoring and analysis software. The IQ Series Microinverters extend the reliability standards set forth by previous generations and undergo over a million hours of power-on testing, enabling Enphase to provide an industry-leading warranty of up to 25 years. Enphase IQ 7A Microinverter To learn more about Enphase offerings, visit enphase.com Data SheetEnphase MicroinvertersRegion: AMERICAS High Power • Peak output power 366 VA @ 240 VAC and 295 VA @ 208 VAC Easy to Install • Lightweight and simple • Faster installation with improved, lighter two-wire cabling • Built-in rapid shutdown compliant (NEC 2014 & 2017) Efficient and Reliable • Optimized for high powered 60-cell and 72-cell modules • Highest CEC efficiency of 97% • More than a million hours of testing • Class II double-insulated enclosure • UL listed Smart Grid Ready • Complies with advanced grid support, voltage and frequency ride-through requirements • Envoy and Internet connection required • Configurable for varying grid profiles • Meets CA Rule 21 (UL 1741-SA) 1. No enforced DC/AC ratio. See the compatibility calculator at https://enphase.com/en-us/support/module-compatibility.2. CEC peak power tracking voltage range is 38 V to 43 V.3. Maximum continuous input DC current is 10.2A. 4. Voltage range can be extended beyond nominal if required by the utility.5. Limits may vary. Refer to local requirements to define the number of microinverters per branch in your area. To learn more about Enphase offerings, visit enphase.com © 2020 Enphase Energy. All rights reserved. Enphase, the Enphase logo, Enphase IQ 7A, Enphase IQ Battery, Enphase Enlighten, Enphase IQ Envoy, and other trademarks or service names are the trademarks of Enphase Energy, Inc. Data subject to change. 2020-06-16 INPUT (DC)IQ7A-72-2-US Commonly used module pairings¹295 W–460 W + Module compatibility 60-cell, 66-cell, and 72-cell PV modules Maximum input DC voltage 58 V Power point tracking voltage range²18 V–58 V Min/Max start voltage 33 V / 58 V Max DC short circuit current (module Isc)³15 A Overvoltage class DC port II DC port backfeed current 0 A PV array configuration 1 x 1 ungrounded array; No additional DC side protection required; AC side protection requires max 20A per branch circuit OUTPUT (AC)@ 240 VAC @ 208 VAC Peak output power 366 VA 295 VA Maximum continuous output power 349 VA 290 VA Nominal (L-L) voltage/range4 240 V / 211–264 V 208 V / 183–229 V Maximum continuous output current 1.45 A (240 VAC)1.39 A (208 VAC) Nominal frequency 60 Hz Extended frequency range 47–68 Hz AC short circuit fault current over 3 cycles 5.8 Arms Maximum units per 20 A (L-L) branch circuit5 11 (240 VAC)11 (208 VAC) Overvoltage class AC port III AC port backfeed current 18 mA Power factor setting 1.0 Power factor (adjustable)0.85 leading ... 0.85 lagging EFFICIENCY @240 VAC @208 VAC CEC weighted efficiency 97.0 %96.5% MECHANICAL Ambient temperature range -40ºC to +60ºC Relative humidity range 4% to 100% (condensing) Connector type: DC (IQ7A-72-2-US)MC4 Dimensions (HxWxD)212 mm x 175 mm x 30.2 mm (without bracket) Weight 1.08 kg (2.38 lbs) Cooling Natural convection — No fans Approved for wet locations Yes Pollution degree PD3 Enclosure Class II double-insulated, corrosion resistant polymeric enclosure Environmental category / UV exposure rating NEMA Type 6 / outdoor FEATURES Communication Power Line Communication (PLC) Monitoring Enlighten Manager and MyEnlighten monitoring optionsCompatible with Enphase IQ Envoy Disconnecting means The AC and DC connectors have been evaluated and approved by UL for use as the load-break disconnect required by NEC 690. Compliance CA Rule 21 (UL 1741-SA)UL 62109-1, UL1741/IEEE1547, FCC Part 15 Class B, ICES-0003 Class B, CAN/CSA-C22.2 NO. 107.1-01 This product is UL Listed as PV Rapid Shut Down Equipment and conforms with NEC-2014 and NEC-2017 section 690.12 and C22.1-2015 Rule 64-218 Rapid Shutdown of PV Systems, for AC and DC conductors, when installed according manufacturer’s instructions. Enphase IQ 7A Microinverter SIL - 370/375/380 BK * Chubb provides error and omission insurance to Silfab Solar Inc. NOT JUST ANOTHER SOLAR PANEL. Introducing Silfab Elite. The highest efficiency solar panel (up to 21.4%) manufactured exclusively in the United States. SILFABELITE.COM SILFAB SOLAR INC. 800 Cornwall Ave Bellingham WA 98225 USA T +1 360.569.4733 info@silfabsolar.com SILFABSOLAR.COM 1770 Port Drive Burlington WA 98233 USA T +1 360.569.4733 240 Courtneypark Drive East Mississauga ON L5T 2Y3 Canada T +1 905.255.2501 F +1 905.696.0267 Silfab - SIL-370/375/380-BK-20210803No reproduction of any kind is allowed without permission. Data and information is subject to modifications without notice. © Silfab Solar Inc., 2021. Silfab SolarTM is a trademark of Silfab Solar Inc.FRAME PROFILETEMPERATURE RATINGS Temperature Coefficient Isc +0.046 %/°C Temperature Coefficient Voc -0.279 %/°C Temperature Coefficient Pmax -0.377 %/°C NOCT (± 2°C)43.5 °C Operating temperature -40/+85 °C WARRANTIES Module product workmanship warranty 25 years** Linear power performance guarantee 30 years ≥ 97.1% end 1st yr ≥ 91.6% end 12th yr ≥ 85.1% end 25th yr ≥ 82.6% end 30th yr MECHANICAL PROPERTIES / COMPONENTS METRIC IMPERIAL Module weight 19.0±0.2 kg 41.9±0.4 lbs Dimensions (H x L x D)1795 mm x 990 mm x 38 mm 70.67 in x 38.98 in x 1.5 in Maximum surface load (wind/snow)*4000 Pa rear load / 5400 Pa front load 83.5/112.8 lb/ft^2 Hail impact resistance ø 25 mm at 83 km/h ø 1 in at 51.6 mph Cells 66 high efficiency back contact mono-PERC c-Si cells 66 high efficiency back contact mono-PERC c-Si cells Glass 3.2 mm high transmittance, tempered, DSM anti-reflective coating 0.126 in high transmittance, tempered, DSM anti-reflective coating Cables and connectors (refer to installation manual)1200 mm ø 5.7 mm, MC4 from Staubli 47.24 in, ø 0.22 in, MC4 from Staubli Backsheet Multilayer, integrated insulation film and electrically conductive backsheet, superior hydrolysis and UV resistance, fluorine- free PV backsheet Frame Anodized Aluminum (Black) Bypass diodes 3 diodes-30SQ045T (45V max DC blocking voltage, 30A max forward rectified current) Junction Box UL 3730 Certified, IP67 rated SHIPPING SPECS Modules Per Pallet:26 or 26 (California) Pallets Per Truck 34 or 32 (California) Modules Per Truck 884 or 832 (California) CERTIFICATIONS Product ULC ORD C1703, UL1703, CEC listed, UL 61215-1/-1-1/-2, UL 61730-1/-2, IEC 61215-1/-1-1/-2. IEC 61730-1/-2, CSA C22.2#61730-1/-2, IEC 62716 Ammonia Corrosion; IEC61701:2011 Salt Mist Corrosion Certifed, UL Fire Rating: Type 1 Factory ISO9001:2015 ELECTRICAL SPECIFICATIONS 370 375 380 Test Conditions STC NOCT STC NOCT STC NOCT Module Power (Pmax)Wp 370 277.78 375 282.05 380 284.6 Maximum power voltage (Vpmax)V 38.34 35.90 38.61 36.15 38.88 36.41 Maximum power current (Ipmax)A 9.69 7.74 9.77 7.80 9.79 7.82 Open circuit voltage (Voc)V 44.76 42.01 44.94 42.18 45.13 42.36 Short circuit current (Isc)A 10.33 8.32 10.41 8.39 10.50 8.46 Module efficiency %20.8 19.5 21.1 19.8 21.4 20.0 Maximum system voltage (VDC)V 1000 Series fuse rating A 20 Power Tolerance Wp 0 to +10 Measurement conditions: STC 1000 W/m2 • AM 1.5 • Temperature 25 °C • NOCT 800 W/m² • AM 1.5 • Measurement uncertainty ≤ 3% Sun simulator calibration reference modules from Fraunhofer Institute. Electrical characteristics may vary by ±5% and power by 0 to +10W. * Warning. Read the Safety and Installation Manual for mounting specifications and before handling, installing and operating modules. ** 12 year extendable to 25 years subject to registration and conditions outlined under “Warranty” at silfabsolar.com PAN files generated from 3rd party performance data are available for download at: silfabsolar.com/downloads System Weight Total system weight 2,286.5 lbs Weight/attachment 19.1 lbs Racking weight 569.0 lbs Distributed weight 2.9 psf Load Assumptions Wind exposure B Wind speed 115 mph Ground snow load 50 psf Attachment spacing portrait 4.0' Attachment spacing landscape 4.0' Span Details XR100 - Portrait Zone Max span Max cantilever 1 6' 6"2' 7" 2 6' 6"2' 7" 3 6' 6"2' 7" Reaction Forces XR100 - Portrait Zone Down (lbs) Uplift (lbs) Lateral (lbs) 1 271 121 128 2 271 150 128 3 271 150 128 Span Details XR100 - Landscape Zone Max span Max cantilever 1 7' 11"3' 2" 2 7' 11"3' 2" 3 7' 11"3' 2" Reaction Forces XR100 - Landscape Zone Down (lbs) Uplift (lbs) Lateral (lbs) 1 149 67 71 2 149 83 71 3 149 83 71 Project Details Name 17714 Fortune Trail Date 10/26/2021 Location 17714 Fortune Trail, Farmington, MN 55024 Total modules 41 Module Silfab: SIL-380-BK (38mm)Total watts 15,580 Dimensions 70.67" x 38.98" x 1.5" (1795.0mm x 990.0mm x 38.0mm)Attachments 120 ASCE 7-10 Rails per row 2 Roof Information Roof Material Family Comp Shingle Roof material Comp Shingle Building height 30 ft Roof attachment Flashfoot2 Roof slope 30 °Attachment hardware Square Risk category II Last updated by Ben Maki on 10/26/21 02:05 PM Page 1 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 Roof Section 1 Definition Roof Section Weights Roof Section (all segments) 32 modules Total weight: 1,802.2 lbs Provided rail: 460' [28 x 14', 4 x 17'] East-West rail orientation Weight/attachment: 18.0 lbs Attachments: 100 Landscape module orientation Total Area: 622.7 sq ft Splices: 16 Graphical entry Distributed weight: 2.9 psf Clamps: 48 Diagram 29' 5"29' 3"Segments Columns Length Cantilever Cantilever Violations Rail Attachments Splices Clamps 3 17' 11"11"None 56' [4 x 14']10 2 4 Row segment totals (x 2) →112' [8 x 14']20 4 8 4 23' 10"1' 11"None 56' [4 x 14']12 2 6 Row segment totals (x 4) →224' [16 x 14']48 8 24 5 29' 9"10"None 62' [2 x 14', 2 x 17']16 2 8 Row segment totals (x 2) →124' [4 x 14', 4 x 17']32 4 16 Roof Section 2 Definition Roof Section Weights Roof Section (all segments) 9 modules Total weight: 484.3 lbs Provided rail: 112' [8 x 14'] East-West rail orientation Weight/attachment: 24.2 lbs Attachments: 20 Portrait module orientation Total Area: 177.3 sq ft Splices: 0 Graphical entry Distributed weight: 2.7 psf Clamps: 10 Diagram 22' 11"11' 10"Segments Columns Length Cantilever Cantilever Violations Rail Attachments Splices Clamps 3 10'1'None 28' [2 x 14']6 0 4 Row segment totals (x 2) →56' [4 x 14']12 0 8 1 3' 5"0"None 28' [2 x 14']4 0 0 2 6' 8"1' 4"None 28' [2 x 14']4 0 2 Last updated by Ben Maki on 10/26/21 02:05 PM Page 2 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 Side View (portrait) 30° BUILDING STRUCTURE ROOF MEMBRANE FLASHFOOT2 RAIL PV MODULE Front View (portrait) ATTACHMENT SPAN 4.0’ BUILDING STRUCTURE ROOF MEMBRANE FLASHFOOT2 RAIL PV MODULE Last updated by Ben Maki on 10/26/21 02:05 PM Page 3 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 Side View (landscape) 30° BUILDING STRUCTURE ROOF MEMBRANE FLASHFOOT2 RAIL PV MODULE Front View (landscape) ATTACHMENT SPAN 4.0’ BUILDING STRUCTURE ROOF MEMBRANE FLASHFOOT2 RAIL PV MODULE Last updated by Ben Maki on 10/26/21 02:05 PM Page 4 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 Splice Details INTERNAL SPLICE SIDE-FACING SLOT TOP-FACING SLOT XR100 XR100 RAIL BONDING SPRING XR100 INTERNAL SPLICE Splice Connection Clamp Detail Mid Clamp, Plan UNIVERSAL FASTENING OBJECT PV MODULE FRAME Mid Clamp, Front RAIL PV MODULEFRAME UNIVERSALFASTENINGOBJECT PV MODULEFRAME RAIL CAMO CAMO End Clamp, Plan CAMO RAIL CAMO End Clamp, Front PV MODULEFRAME FlashFoot2 Detail Plan View 9” 12” 2 “316 Side View 1 “1116 Perspective View Front View 1 “58 3 “516 “516 Last updated by Ben Maki on 10/26/21 02:05 PM Page 5 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 Grounding Diagram * Grounding Lugs and Wire are not required in systems using Enphase microinverters. UFO Clamp Fault Current Ground Path Min 10 AWG Copper Wire * Grounding Lug * Bonded Splice (Rail Connection) Last updated by Ben Maki on 10/26/21 02:05 PM Page 6 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 Bill of Materials Part Spares Total Qty Rails & Splices XR-100-204B XR100, Rail 204" (17 Feet) Black 0 4 XR-100-168B XR100, Rail 168" (14 Feet) Black 0 36 XR100-BOSS-01-M1 Bonded Splice, XR100 0 16 Clamps & Grounding UFO-CL-01-B1 Universal Module Clamp, Black 0 58 CAMO-01-M1 Hidden End Cam (universal clamp)0 48 XR-LUG-03-A1 Grounding Lug, Low Profile 0 12 Attachments FF2-01-B2 FlashFoot2, Black 0 120 BHW-SQ-02-A1 Square-Bolt Bonding Hardware 0 120 Accessories BHW-MI-01-A1 Microinverter/MLPE Bonding Hardware, T-Bolt 0 41 Last updated by Ben Maki on 10/26/21 02:05 PM Page 7 of 7 17714 Fortune Trail (#841003) pitched roof 28357 INDUSTRIAL BLVD., HAYWARD, CA 94545 VSE Project Number: U3708.0016.211 November 5, 2021 Live Wire Electric 9133 Davenport St NE Blaine, MN 55449 REFERENCE: Laurie Johnson Residence: 17714 Fortune Trail, Farmington, MN 55024 Solar Array Installation To Whom It May Concern: Per your request,we have reviewed the existing structure at the above referenced site.The purpose of our review was to determine the adequacy of the existing structure to support the proposed installation of solar panels on the roof as shown on the panel layout plan. Based upon our review, we conclude that the existing structure is adequate to support the proposed solar panel installation. Design Parameters Code: 2020 Minnesota Building Code (2018 IBC) Risk Category: II Design wind speed, Vult: 109 mph (3-sec gust) Wind exposure category: C Ground snow load, Pg: 50 psf Existing Roof Structure Roof structure: 2x4 manufactured trusses @ 24" o.c. Roofing material: composite shingles Connection to Roof Mounting connection: (1) 5/16" lag screw w/ min. 2.5" threaded embedment into framing at max. 48" o.c. (portrait and landscape) along rails (2) rails per row of panels, evenly spaced; panel length perpendicular to the rails not to exceed 71 in. Rail cantilever shall not exceed 50% of connection spacing. Conclusions Based upon our review,we conclude that the existing structure is adequate to support the proposed solar panel installation. The glass surface of the solar panels allows for a lower slope factor per ASCE 7,resulting in reduced design snow load on the panels.The gravity loads,and thus the stresses of the structural elements,in the area of the solar array are either decreased or increased by no more than 5%.Therefore,the requirements of Section 806.2 of the 2020 Minnesota Conservation Code for Existing Buildings are met and the structure is permitted to remain unaltered. 651 W. Galena Park Blvd., Ste. 101 / Draper, UT 84020 / T (801) 990-1775 / F (801) 990-1776 / www.vectorse.com VSE Project Number: U3708.0016.211 Laurie Johnson Residence 11/5/2021 The solar array will be flush-mounted (no more than 10"above the roof surface)and parallel to the roof surface.Thus,we conclude that any additional wind loading on the structure related to the addition of the proposed solar array is negligible. The attached calculations verify the capacity of the connections of the solar array to the existing roof against wind (uplift), the governing load case.Because the increase in lateral forces is less than 10%,this addition meets the requirements of the exception in Section 806.3 of the 2020 Minnesota Conservation Code for Existing Buildings.Thus the existing lateral force resisting system is permitted to remain unaltered. Limitations Installation of the solar panels must be performed in accordance with manufacturer recommendations.All work performed must be in accordance with accepted industry-wide methods and applicable safety standards.The contractor must notify Vector Structural Engineering,LLC should any damage,deterioration or discrepancies between the as-built condition of the structure and the condition described in this letter be found.Connections to existing roof framing must be staggered,except at array ends,so as not to overload any existing structural member.The use of solar panel support span tables provided by others is allowed only where the building type,site conditions,site-specific design parameters,and solar panel configuration match the description of the span tables.The design of the solar panel racking (mounts,rails,etc.)and electrical engineering is the responsibility of others.Waterproofing around the roof penetrations is the responsibility of others.Vector Structural Engineering assumes no responsibility for improper installation of the solar array. VECTOR STRUCTURAL ENGINEERING, LLC 11/05/2021 _______________________________________________________ Brett Veazie, P.E. Project Engineer Enclosures BDV/zrm I hereby certify that this plan, specification or report was prepared by me or under my direct supervision and that I am a duly Licensed Professional Engineer under the laws of the State of Minnesota. Brett Veazie, License No. 56392, Expiration Date: 30-June-2022 11/05/2021 651 W. Galena Park Blvd., Ste. 101 / Draper, UT 84020 / T (801) 990-1775 / F (801) 990-1776 / www.vectorse.com JOB NO.:U3708.0016.211 SUBJECT:WIND PRESSURE PROJECT:Laurie Johnson Residence Label:Note: Calculations per ASCE 7-16 SITE-SPECIFIC WIND PARAMETERS: Basic Wind Speed [mph]:109 Notes:Exposure Category:C Risk Category:II Importance Factor, I: ADDITIONAL INPUT & CALCULATIONS: Height of Roof, h [ft]:25 (Approximate) Comp/Cladding Location:Gable Roofs 27° < θ ≤ 45° Enclosure Classification: Zone 1, 2e, 2r GCp:1.73 Zone 1, 2e, 2r γa:0.77 Zone 2n, 3r GCp:1.94 Zone 2n, 3r γa:0.77 Zone 3e GCp:2.42 Zone 3e γa:0.77 γa:0.40 α:9.5 Table 26.11-1 zg [ft]:900 Table 26.11-1 Kh:0.95 Table 26.10-1 Ke:0.97 Table 26.9-1 Kzt:1 Equation 26.8-1 Kd:0.85 Table 26.6-1 Velocity Pressure, qh [psf]:23.6 Equation 26.10-1 γE:1.50 Section 29.4.4 γC:0.96 Section 29.4.4 γP:1.20 Section 29.4.4 p = q h (GC p )(γ E )(γ a ) p = q h (GC rn ), (GC rn ) = (γ p )(γ c )(γ E )(GC rn )nom Zone 1, 2e, 2r, p [psf]:47.0 psf (1.0 W) Zone 2n, 3r, p [psf]:53.0 psf (1.0 W) Zone 3e, p [psf]:65.9 psf (1.0 W) (a =3 ft) Fig. 29.4-8 WIND PRESSURES:Equation 29.4-7 Solar Panel Array Enclosed Buildings Figure 30.3-2D (negative coeff.) Components and Cladding Wind Calculations JOB NO.:U3708.0016.211 SUBJECT:CONNECTION PROJECT:Laurie Johnson Residence Calculate Uplift Forces on Connection Pressure (0.6 Dead -0.6 Wind) (psf) Max Trib. Width1 (ft) Max Trib. Area2 (ft2) Max Uplift Force (lbs) Zone 1, 2e, 2r 26.4 4.0 11.8 313 Zone 2n, 3r 30.0 4.0 11.8 355 Zone 3e 37.7 4.0 11.8 447 Calculate Connection Capacity Lag Screw Size [in]:5/16 Cd:1.6 NDS Table 2.3.2 Embedment3 [in]:2.5 Grade: Nominal Capacity [lbs/in]:205 NDS Table 12.2A Number of Screws:1 Prying Coefficient:1.4 Total Capacity [lbs]:586 Determine Result Maximum Demand [lbs]:447 Lag Screw Capacity [lbs]:586 Result:Capacity > Demand, Connection is adequate. Notes 1. 'Max Trib. Width' is the width along the rails tributary to the connection. 2. 'Max Trib Area' is the product of the 'Max. Trib Width' and 1/2 the panel width/height perpendicular to the rails. (2) rails per row of panels. Length of panels perpendicular to the rails shall not exceed 71". SPF (G = 0.42) 3. Embedment is measured from the top of the framing member to the beginning of the tapered tip of the lag screw. Embedment in sheathing or other material is not effective. The length of the tapered tip is not part of the embedment length. VECTOR STRUCTURAL ENGINEERS JOB NO.:U3708.0016.211 SUBJECT:GRAVITY LOADS PROJECT:Laurie Johnson Residence GRAVITY LOADS Roof Pitch: 6.9 :12 ROOF DEAD LOAD (D) Increase due to pitch Material weight [psf] Composite Shingles 1.15 2.0 1/2" Plywood 1.15 1.0 Framing 1.00 3.0 Insulation 1.00 0.5 1/2" Gypsum Clg.1.15 2.0 M, E & Misc 1.00 1.5 Total Existing Roof DL PV Array DL 1.15 3 DL:1.15 ROOF LIVE LOAD (Lr) Existing Design Roof Live Load [psf]20 ASCE 7-16 Table 4.3-1 Roof Live Load With PV Array [psf]0 SNOW LOAD (S):w/ Solar Array Roof Slope [x:12]:6.9 Roof Slope [°]:30 Ground Snow Load, pg [psf]:50 ASCE 7-16, Section 7.2 Terrain Category:C ASCE 7-16, Table 7.3-1 Exposure of Roof:Fully Exposed ASCE 7-16, Table 7.3-1 Exposure Factor, Ce:0.9 ASCE 7-16, Table 7.3-1 Thermal Factor, Ct:1.1 ASCE 7-16, Table 7.3-2 Risk Category:II ASCE 7-16, Table 1.5-1 Importance Factor, Is:1.0 ASCE 7-16, Table 1.5-2 Flat Roof Snow Load, pf [psf]:35 ASCE 7-16, Equation 7.3-1 Minimum Roof Snow Load, pm [psf]:0 ASCE 7-16, Section 7.3.4 Unobstructed Slippery Surface?Yes ASCE 7-16, Section 7.4 Slope Factor Figure:Figure 7-2b ASCE 7-16, Section 7.4 Roof Slope Factor, Cs:0.67 ASCE 7-16, Figure 7.4-1 Sloped Roof Snow Load, ps [psf]:23 ASCE 7-16, Equation 7.4-1 Design Snow Load, S [psf]:23 1.00 35 Design material weight [psf] 2.3 1.2 3.0 0.5 2.3 1.5 10.8 3.5 #VALUE! 2020 MBC, Section 1607.13.5 Existing 35 6.9 30 50 C Fully Exposed 0.9 1.1 II 1.0 35 0 No Figure 7-2b JOB NO.:U3708.0016.211 SUBJECT:LOAD COMPARISON PROJECT:Laurie Johnson Residence Summary of Loads Existing With PV Array D [psf]11 14 Lr [psf]20 0 S [psf]35 23 Maximum Gravity Loads: Existing With PV Array (D + Lr) / Cd [psf]25 16 ASCE 7-16, Section 2.4.1 (D + S) / Cd [psf]39 32 ASCE 7-16, Section 2.4.1 Maximum Gravity Load [psf]:39 32 Ratio Proposed Loading to Current Loading:82%OK The gravity loads, and thus the stresses of the structural elements, in the area of the solar array are either decreased or increased by no more than 5%. Therefore, the requirements of Section 806.2 of the 2020 Minnesota Conservation Code for Existing Buildings are met and the structure is permitted to remain unaltered. (Cd = Load Duration Factor = 0.9 for D, 1.15 for S, and 1.25 for Lr)