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30 BOARDMAN ST - BPA-2010-122 SOLAR .............. ,fl: f pill URN .... ............. ................. Y' 1 = Massachusetts State Building Code, 7&)CMR T^edthon , '::USE ' Nit Building Perin 4" s If ........ ...... Date SE L CTION".I iSITEINFORM .......... -AM... _P,jta* b"' NZAfi ...............j .......... rs .......... thw.unAq5;cp0 aR.. vll.I ............ ------ ..lAiiti Yard 16 Water—Supply- ...... 54i F e orma I;& 4.7j', Tj Sewage Disposal System, t. CLhjjkjf [3 ...... . ... SECTION '2."Pt6ft AtiW.',OW,.NEP................. i� Nome(Print) / / Address for Service p............ ............ '$ liph ....... SECTIONS a,PROPOSEOMORK- App New M"eyfio Vq- .......... it' to 5 W,W—or ............................ op ....... . . Item (L¢bor.'uhd'Materials) Ot11cJa1 Use Only -h- k determined Cate 7 161 Fire Su `esston) Total All Fees: ........... 6 Total Pro eculubsu:i '65 651, t U .......... . .......... -Fp SECTION .........SUP,............ �4 N'toWM -till Tit"- T;E g,� 8npuation Date .. ......... ' SECTION 6 WORKERS'COMPENSATION INSURANCE F'' , "'� :,Workers Compensarvan Insiiraoce'affidav must'be eompletedond submitted with this appltcuuon Failure to pntvtde .......... LP .I........ ect property ;su .....I.... ig 'SenV genthe that the statements UHU 1"guflu"W's on the foregoing appltcattoti ore tine and accurate to the besi of my knowledge aad ' y .Behalf ........... 1 RoO,tierf who obtains a bmWing permit to do his/her own work,or an owae�r who hues ........... it unregistered wntrouor 2 When stibsrsntial work is planned provide the information beb7 Taal flolms area "If MW b CS.,ae—C,kis';IIW"punb f WdIngigu inis asomoin ,^ Type uF'heaing system '' 'S ` s Number of desks/poahes r ' ` 3`� "Coral ProlectSquare Footage--:may be suhstituted farms l'ota!'Prodect Cost 4 � `' � • �(Jjj age ............ y � r F s 4 F P c f � ti LAWRENCE IEL OGDEN,PE. 198 EAST MAIN STREET GEORGETOWN,MA 01833 978-352-8318 fax 978—352-2858 cell 978-502-5921 August 5, 2009 Mr.. Slip Provost Nexamp 21 High Street.Suite 209 North Andover,Ma. 01845 RE: Stafford Residence 30 Boardman St. Salem Ma. Dear Mr. Provost As you requested I visited the above project with Mr. Richard Stafford, property owner and Mr. Palmer Moore of Nexamp to review the existing roof structure as to it's adequacy to support the additional load of 3 Psf. resulting from the addition of solar panels on the roof. This residence was probably constructed in the early 1900s and the roof rafters consist of full size 2*6s @ 26"oc. with a span of approximately 131 ft. onto a short knee wall. Assuming a wood strength of fb= 1000 psi. (common at that time). These rafters meet the required snow load of the Oh Edition of the Massachusetts State Building code when considering the snow load reduction for a 12 pitch roof with the additional added dead load of 3Psf. The P floor level of the residence is finished and enclosed within the roof structure with a ceiling tie approximately 6 ft. down from the ridge. Therefore I could not examine the bearing ends of the rafters or certify their condition. However a visual inspection of the finished ceilings and knee walls did not indicate any significant distress. Further from the ground there is no evidence of sagging of the roof or displacement of the exterior walls, During the course of construction should any latent conditions be uncovered that indicate deterioration or distress of the structure or rafters please notify me. My opinion based on what I could see and verify is that the roof rafters are acceptable and capable of supporting the additional load. Should you require any additional information please do not hesitate to call. Yo s truly, or� �H OF,y� � wrence H. Ogden,P.E. 43765 c `° F Cc: Mr. Richard Stafford FSS�oNAI Ok SolarMount' PV's most versatile mounting system H v WWI _FF .Ground`Mounted-,--Roof Mounted, d" Open Structure Googie Campus`;caatifornia Solution' Solution qi{ , Solution , _ „±„ zoo7,courtesy ofE solution n . III', I 1 ►. : SolarMount is the most versatile PV mounting rail system on the market today. We've engineered installer-friendly components for maximum flexibility, allowing you to solve virtually any PV mounting challenge. The universal SolarMount rail system has three options which can be assembled into a wide variety of PV mounting structures to accommodate any job site. Unirac provides a technical support system complete with installation and code compliance documentation, an on-line estimator and design assistance to help you solve the toughest challenges. = UNIRAC Bright l hinkngri Iolar Visit us Online at www.unirac.com SOLARMOUNT®R RAIL OPTIONS PV's most versatile mounting system SolarMount' HD HD(heavy duty) rail adds the SDIarMount advantage to PV PDIeTops", U-I.As(see separate data sheets), and custom applications that require long spans. 1 Standard SolarMount" Standard rail gives you ultimate Flexibility, including MODULE MOUNTING bottom mounting and tilt_up optiOns. Assembly Sequence Is Your Choice Top Mounting Clamps Bottom Mounting Clips Ideal for Flush mount applications, Use bottom mounting clips such as residential rooftops,where (standard and I11) rail only) it is most convenient to secure whenever you prefer to footings and rails before Installing preassemble the array using modules,top mounting damps module mounting holes. securely grip arry point of tire Simply fit the clip into its rail module frame,freeingyau tram slot over the mounting bolt for the constraints of module - a secure connection.Adjust the mounting holes- dip position anywhere along the rail slot. f '6 James A. Marx, Jr. 10 High Mountain Road Ringwood,NJ 07456 Tel.No. 973-557-6080 Fax No. 973-835-5924 E-mail:jamlight@bellatlantic.net August 1,2008 Unirac, Inc. 1411 Broadway Blvd.NE Albuquerque,NM 87102 To: Building Department or Others: RE: Engineer's Notice of Evaluation for UniRac SolarMount` Universal PV Module Mounting System for application to One and Two Family Dwellings in Massachusetts Dear Sir: I have evaluated the Unirac SolarMountTm "Code-Compliant Installation Manual 227", copyright February 2008 and certify that the information and results are accurate. To determine the design level forces,the appropriate wind speed and ground snow conditions must be determined as prescribed by local jurisdiction requirements for Massachusetts and applied in accordance to the Seventh Ed. of the 780 CMR Massachusetts State Building Code(One and Two Family Dwelling)requirements. The Massachusetts State Building Code(One and Two Family Dwelling)requires that wind loading be determined based upon Table 5301.2(4) Basic Wind Speeds and Table Roof Height of 30 5301.2(2) Component and Cladding Loads for a Building with a Mean oo gh ( ) P g g feet in Exposure B and Table 5301.2(3) Height and Exposure Adjustment Coefficients for Table 5301.2(2)of which replaces Unirac's Manual 227 Table 2 and Table 3 that follows ASCE 7-02/05 requirements. The Massachusetts State Building Code is dependent upon conditions of spatial form,height,exposure category and other structure parameters that are specified in the code provisions and illustrated in Figure 5301.2(8). The Sixth Ed. of the 780 CMR Massachusetts State Building Code should be used to determine the snow loading on the solar panels that is imposed on railing and roof mounting supports and conditions of balanced snow, unbalanced snow and drift loads that will need to be determined. James A. Marx,Jr. Page 2 of 3 For other building conditions not included by the Massachusetts State Building Code (One and Two Family Dwelling), the determination of wind pressures (wind speeds must be converted to fastest mile wind velocities)and snow loads should be determined by the Sixth Ed. of the 780 CMR Massachusetts State Building Code that is referenced in Section 1610.0 and 1611.0. For determining the Total Design Load,the Unirac Part II procedure shall be replaced with Sixth Ed. of the 780 CMR Massachusetts State Building Code, Section 1616.2 that has Load Combinations Using the Allowable Stress Design(ASD) for which the determination of distributed load on the railing,w(plf) and the uplift point load shall be obtained. The SolarMountTM railing distributed loading capacity and anchorage requirements for the installation are properly represented in the Installation Manual 227 for which Table 8 furnishes L-Foot SolarMount Series Rail Span and Table 12 furnishes Lag pull-out (withdrawal capacities in typical roof lumber(ASD). The Unirac design verification is based on: I. ASCE7-05—ASCE Standard II. "Steel Construction Manual," 13th Ed., American Institute of Steel Construction, Chicago, IL,2005. III. "Aluminum Design Manual",The Aluminum Association, Washington D.C., 2005. IV. Mechanical Properties and Static Load Testing of Unirac extruded rails and related components obtained from Dr. Walter Gerstle, PE, Department of Civil Engineering, University of New Mexico, Albuquerque,NM Use: Unirac SolarMounfrm is evaluated for use in locations where wind pressure requirements do not exceed 50 psf or snow load conditions do not exceed 45 psf ground snow loads. For loading in excess of either of the above stated conditions, Unirac, Inc. should be contacted for suitability of installation. James A. Marx,Jr. Page 3 of 3 By this letter, I certify that the Unirac SolarMountTM assembly, when installed in accordance with the Installation Manual 227 and with the aforementioned application of the loading determination that will meet the requirements of the building codes adopted by Massachusetts. Others should evaluate the structure to which the Unirac SolarMountTm system is to be connected on a case-by-case basis,per Part I—Installer's Responsibilities of the Installation Manual,to ensure its adequacy to accept attachments and to support all applied loadings per the building code. Please call me if you have any questions or concerns. Sincerely, yel" James A. Marx,Jr. IE` Professional Engineer MA License Number 36365 cc:James Madrid, Unirac iI PV ARRAY INFORMATION#1&2 PV11800 INVERTER RATINGS PV11800: 690.53 PHOTOVOLTAIC POWER SOURCE SIGN ON DC DISCONNECT - #OF MODULES IN SERIES=9 MAX DC VOLT RATING=600 VDC RATED CURRECT=7.90 ADC #OF PARALLEL CIRCUITS=1 MAX POWER @40'C=1.8 KW - RATED VOLTAGE=239.4 VDC LOWEST EXPECTED TEMP -20°C NOMINAL AC VOLTAGE=240 VAC MAX SYS VOLTAGE-347.4 VOC HIGHEST EXPECTED TEMP 37`C MAX AC CURRENT=7.5 AAC MAX CIRC CURRENT=10.7 ADC UTILITY SERVICE M AC LOCKABLE DISCONNECT SWITCH LOCATED ON EXTERIOR NEAR METER IF Pv AnPwrzl REQUIRED BY UTILITY 9 MODULES IN SERIES NE PV11800 PVI1800 1 OF1 ° JUNCTION am AC OISLONNECI AL OISCONNEU w AaaAr az } GL MA 9 MODULES IN SERIES 1 OF1 A ROOF GFOWIOING LSE J OP tEl E%I6TNGPMIEL EXISTING PANEL RATINGS DC DISCONNECT RATINGS AC DISCONNECT RATINGS BUS AMP RATING=125 AAC DISCONNECT FUSE RATING=NIA DISCONNECT FUSE RATING=NIA SERVICE VOLTAGE=240 VAC DISCONNECT VOLT RATING=600V DISCONNECT VOLT RATING 240V MAIN AMP RATING=100 AAC WIRE SIZES: ® (2)910 USE-2&(1)#10 EGC In Metal Raceway PV MODULE RATINGS(a1STC SOURCE CIRCUIT WIRE TYPE(OUTSIDE CONDUIT) USE-2 ® (4)#10 THWN-2 Cu&(2)#10 Cu EGC In Metal Raceway MODULE MANUFACTURER:KYOCERA SOURCE CIRCUIT WIRE TYPE(INSIDE CONDUIT)=THHNITHWN-2 © (2)#10THWN-2Cu&(1)#10Cu EGCIn Metal Raceway MODULE MODEL M. KD210GX-LP SOURCE CIRCUIT WIRE SIZE(SEE NOTE BELOW)= 10 AWG Ex;(Isc x(1.25)(1.25)(#STRINGS IN PARALLEL)=WIRE AMPACITY NOTES: OR USING TABLE 690.31(C)TEMP CORRECTION FACTORS:(WHICHEVER IS HIGHER) OPEN-CIRCUIT VOLTAGE= 33.2 VDC 1)ASHRAE FUNDAMENTALS OUTDOOR DESIGN TEMPERATURES DO NOT OPERATING VOLTAGE= 26A VDC EXCEED 47°C IN THE UNITED STATES(PHOENIX,AZ:PALM SPRINGS,CA) 2)FOR LESS THAN 9 CURRENT-CARRYING CONDUCTORS IN MAX SYSTEM VOLTAGE= 600 VDC ROOF-MOUNTED SUNLIT CONDUIT AND USING THE OUTDOOR DESIGN nexamp PV ONE-LINE WIRING DIAGRAM OPERATING CURRENT= 7.90 ADC TEMPERATURE OF 47°C, SHORT-CIRCUIT CURRENT= 8.58 ADC a)12 AWG CONDUCTORS ARE GENERALLY ACCEPTABLE FOR STAFFORD RESIDENCE MODULES WITH Isc OF 6A AMPS OR LESS WHEN PROTECTED BY A 1(-AMP FUSE. 30 BOARDMAN STREET MAXIMUM POWER=21O W SALEM,MA 01970 VOCTEMPCOEFF- .12%/°C b)10 AWG CONDUCTORS ARE GENERALLY ACCEPTABLE FOR Na. . MODULES WITH Isc OF 9.6 AMPS OR LESS WHEN PROTECTED BY MODULEF E=1 ADC 15-AMPFUSE. Daum BY:BWNTABLBNM1I aAM WV9 SCALE: NITS I SHEET: IOF1