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HomeMy WebLinkAboutLA225273-APPROVED-Richard Black Engineering 07-02-24· · · · · Signed 7/02/2024 Concept Approval ONLY Subject to Field Inspection Inspector Date 2015 MN Bldg Code 07/08/2024jnuetzman TRUE NORTH · · · · · MSP AC DC AC UM +A7C+(DAR(A:Δ//PR29ΔD(A  )ΔR(C2D(PA7+:A< 72C2MP/<:Δ7+Δ)C1121 +2US721127( 12(1CR2AC+M(17Δ172(AS(M(17%< 1(:SC2P(2):2R. S2/ARPA1(/S MSPACDCACUMP9-2 AP9-2 % RS-1 RS-2 DESIGN ADDENDUMS TO STANDARD TEMPLATE BASED ON CITY, STATE, UTILITY, AHJ, OR PREVIOUS PLAN REVIEWER COMMENTS IF THERE ARE CONFLICTING NOTES, ADDENDUMS TAKE PRECEDENCE OVER STANDARD TEMPLATE NOTES ADDENDUM #4 - XCEL: YELLOW WITH BLACK LETTERING “UTILITY PV AC DISCONNECT” PLACARD REQUIRED AT THE UTILITY AC DISCONNECT. UTILITY AC DISCONNECT IS TO BE LOCKABLE WITH A VISIBLE OPEN ADDENDUM #5 - XCEL: YELLOW WITH BLACK LETTERING “PHOTOVOLTAIC SYSTEM CONNECETED” PLACARD REQUIRED AT THE MAIN BILLING METER ADDENDUM #43 - XCEL: DC SYSTEM SIZE= 9.2kW & AC SYSTEM SIZE = 7600kW ADDENDUM #44 - XCEL: THERE IS NO CLEARANCE ISSUES AND 24/7 UNESCORTED KEYLESS ACCESS SHALL BE PROVIDED TO ALL XCEL ENERGY EQUIPMENT ADDENDUM #45 - XCEL: SINGLE PHASE STRING INVERTER= 7600W INVERTER VOLTAGE: 240V ADDENDUM #53 - XCEL: 1-PHASE, 3-WIRE PV PRODUCTION METER ONLY WHEN SYSTEM IS OVER 10KW. THE PV PRODUCTION METER SOCKET SHALL BE MARKED WITH A STAMPED BRASS, ALUMINUM, OR STAINLESS STEEL TAG, INDICATING THE ADDRESS (INCLUDING UNIT NUMBER), TYPICALLY "PV PROD" IN ACCORDANCE WITH THE REQUIREMENTS FOR "METER IDENTIFICATION" IN SECTION 4.14.4 OF THE BLUE BOOK" Signed 7/02/2024 3' Min. Roof Access 3' Min. Roof Access 18" Min. Rim Access both sides D C 2)R2:SMA<DΔ))(RS+2:1 DRA:1)2R(;AMP/(DΔA*RAM 2)R2:SMA<DΔ))(RS+2:1 DRA:1)2R(;AMP/(DΔA*RAM 2)R2:SMA<DΔ))(RS+2:1 DRA:1)2R(;AMP/(DΔA*RAM A % 12772SCA/( A77ΔCΔ1)2C P9M2DU/( M2U17Δ1*C/ΔP  RA)7(R7RUSS 9PSCA/( 9Δ(:1AM(A  RAΔ/ 1 1[/A*SCR(: Signed 7/02/2024 DESIGN ADDENDUMS TO STANDARD TEMPLATE BASED ON CITY, STATE, UTILITY, AHJ, OR PREVIOUS PLAN REVIEWER COMMENTS IF THERE ARE CONFLICTING NOTES, ADDENDUMS TAKE PRECEDENCE OVER STANDARD TEMPLATE NOTES ADDENDUM #4 - XCEL: YELLOW WITH BLACK LETTERING “UTILITY PV AC DISCONNECT” PLACARD REQUIRED AT THE UTILITY AC DISCONNECT. UTILITY AC DISCONNECT IS TO BE LOCKABLE WITH A VISIBLE OPEN ADDENDUM #5 - XCEL: YELLOW WITH BLACK LETTERING “PHOTOVOLTAIC SYSTEM CONNECETED” PLACARD REQUIRED AT THE MAIN BILLING METER ADDENDUM #43 - XCEL: DC SYSTEM SIZE= 9.2kW & AC SYSTEM SIZE = 7600kW ADDENDUM #44 - XCEL: THERE IS NO CLEARANCE ISSUES AND 24/7 UNESCORTED KEYLESS ACCESS SHALL BE PROVIDED TO ALL XCEL ENERGY EQUIPMENT ADDENDUM #45 - XCEL: SINGLE PHASE STRING INVERTER= 7600W INVERTER VOLTAGE: 240V ADDENDUM #53 - XCEL: 1-PHASE, 3-WIRE PV PRODUCTION METER ONLY WHEN SYSTEM IS OVER 10KW. THE PV PRODUCTION METER SOCKET SHALL BE MARKED WITH A STAMPED BRASS, ALUMINUM, OR STAINLESS STEEL TAG, INDICATING THE ADDRESS (INCLUDING UNIT NUMBER), TYPICALLY "PV PROD" IN ACCORDANCE WITH THE REQUIREMENTS FOR "METER IDENTIFICATION" IN SECTION 4.14.4 OF THE BLUE BOOK" BATTERY INFO MANUFACTURER PART NUMBER NO BATTERY TOTAL ENERGY (kWh) USABLE ENERGY (kWh) CAPACITY (Ah) NOMINAL VOLTAGE (V) VOLTAGE RANGE (V) MAX POWER (kW) WEIGHT Project information Installer Ambia Project Name 20835 Goodhue Way Design 1 Project Number - Project Address 20835 Goodhue Way, Lakeville, MN 55044 USA AHJ/ASCE City of Lakeville / 7-16 Wind / Exp. Cat. / Snow 115.0mph / C / 50 psf Equipment Type Summary Module URE Co. FBM400MFG-BB Total modules 23 Inverter -Total watts 9200 W Battery --Total Attachments 82 Location preview Arrays Array 1 Roof Type: Gable Roof Material: Comp SkipRail: No Roof Slope: 25°Array 2 Roof Type: Gable Roof Material: Comp SkipRail: No Roof Slope: 25° ENGINEERING PACKET 20835 Goodhue Way Design 1 Ambia Produced by Seth Chamberlain from Ambia on 07/01/24 https://pegasussolar.com | sales@pegasussolar.com © 2024 Pegasus Solar Inc. All Rights Reserved Bill of Materials Part Info Array 1 Array 2 Spares Total QTY PSR-M84 | Pegasus Rail - Mill 84"12 13 -25 PSR-SPLS | Pegasus - Bonded Structural Splice 8 12 -20 PSR-MCZ | Pegasus - Multi-Clamp - Mid/End 30-40mm - Black Ano 28 28 -56 PSR-MLP | Pegasus - MLPE Mount 11 12 -23 PSR-LUG | Pegasus - Ground Lug 1 1 -2 PSR-NSJ | Pegasus - North-South Bonding Jumper 2 1 -3 PSR-WMC | Pegasus - Wire Management Clip 17 18 -35 PSR-CBG | Pegasus - Cable Grip 2 2 -4 PSR-CAP | Pegasus - End Cap 12 8 -20 PIF-RMDT | Pegasus InstaFlash - Mill - Dovetail T-bolt 38 44 -82 ENGINEERING PACKET 20835 Goodhue Way Design 1 Ambia Produced by Seth Chamberlain from Ambia on 07/01/24 https://pegasussolar.com | sales@pegasussolar.com © 2024 Pegasus Solar Inc. All Rights Reserved 76 North Meadowbrook Drive Scott E. Wyssling, PE Alpine, UT 84004 Coleman D. Larsen, SE, PE office (201) 874-3483 Gregory T. Elvestad, PE swyssling@wysslingconsulting.com July 2, 2024 Ambia Solar 5132 North 300 West Provo, UT 84604 Re: Engineering Services Black Residence 20835 Goodhue Way, Lakeville MN 9.200 kW System To Whom It May Concern: We have received information regarding solar panel installation on the roof of the above referenced structure. Our evaluation of the structure is to verify the existing capacity of the roof system and its ability to support the additional loads imposed by the proposed solar system. A. Site Assessment Information 1. Site visit documentation identifying attic information including size and spacing of framing for the existing roof structure. 2. Design drawings of the proposed system including a site plan, roof plan and connection details for the solar panels. This information will be utilized for approval and construction of the proposed system. B. Description of Structure: Roof Framing: Prefabricated wood trusses at 24” on center. All truss members are constructed of 2x4 dimensional lumber. Roof Material: Composite Asphalt Shingles Roof Slopes: 25 degrees Attic Access: Accessible Foundation: Permanent C. Loading Criteria Used • Dead Load o Existing Roofing and framing = 7 psf o New Solar Panels and Racking = 3 psf o TOTAL = 10 PSF • Dead Load o Existing Roofing and framing = 7 psf o New Solar Panels and Racking = 3 psf o TOTAL = 10 psf • Live Load = 20 psf (reducible) – 0 psf at locations of solar panels • Ground Snow Load = 50 psf • Wind Load based on ASCE 7-16 o Ultimate Wind Speed = 115 mph (based on Risk Category II) o Exposure Category C Analysis performed of the existing roof structure utilizing the above loading criteria is in accordance with the 2020 MRC, including provisions allowing existing structures to not require strengthening if the new loads do not exceed existing design loads by 105% for gravity elements and 110% for seismic elements. This analysis indicates that the existing framing will support the additional panel loading without damage, if installed correctly. Page 2 of 2 D. Solar Panel Anchorage 1. The solar panels shall be mounted in accordance with the most recent Pegasus installation manual. If during solar panel installation, the roof framing members appear unstable or deflect non- uniformly, our office should be notified before proceeding with the installation. 2. The maximum allowable withdrawal force for a 5/16” lag screw is 229 lbs per inch of penetration as identified in the National Design Standards (NDS) of timber construction specifications. Based on a minimum penetration depth of 2½”, the allowable capacity per connection is greater than the design withdrawal force (demand). Considering the variable factors for the existing roof framing and installation tolerances, the connection using one 5/16” diameter lag screw with a minimum of 2½” embedment will be adequate and will include a sufficient factor of safety. 3. Considering the wind speed, roof slopes, size and spacing of framing members, and condition of the roof, the panel supports shall be placed no greater than 48” on center. Based on the above evaluation, this office certifies that with the racking and mounting specified, the existing roof system will adequately support the additional loading imposed by the solar system. This evaluation is in conformance with the 2020 MRC, current industry standards and practice, and is based on information supplied to us at the time of this report. Should you have any questions regarding the above or if you require further information do not hesitate to contact me. Very truly yours, Scott E. Wyssling, PE Minnesota License No. 57927 Minnesota COA # 972 Date Signed 7/2/2024