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17D-033
BP-2022-0156 26 STRAW AVE COMMONWEALTH OF MASSACHUSETTS Map:Block:Lot: 17D-033-001 CITY OF NORTHAMPTON Permit: Solar Build PERSONS CONTRACTING W I"I"I I UNREGISTERED CONTRACTORS DO NOT HAVE ACCESS TO THE GUARANTY FUND (MGL c.142A) BUILDING PERMIT Permit# BP-2022-0156 PERMISSIONISHEREBYGRANTED TO: Project# 2022 SOLAR Contractor: License: Est. Cost: 15975 BRIGHT PLANET SOLAR INC 111552 Const.Class: Exp.Date:02/20/2023 Use Group: Owner: NICOLELLA IRENE F&MARC A PATILLO Lot Size (sq.ft.) Zoning: URB Applicant: BRIGHT PLANET SOLAR INC Applicant Address Phone: Insurance: 5A ST (888)997-4469 R2WC209592 AUBURN, MA 01501 ISSUED ON:02/22/2022 TO PERFORM THE FOLLOWING WORK: INSTALL 15 PANEL 5.325 KW ROOF MOUNTED SOLAR SYSTEM POST THIS CARD SO IT IS VISIBLE FROM THE STREET Inspector of Plumbing Inspector of Wiring D.P.W. Building Inspector Underground: Service: Meter: Footings: Rough: Rough: House# Foundation: Gas: Final: Final: Rough Frame: Rough: Fire Department Driveway Final: Fireplace/Chimney: Final: Oil: Insulation: Smoke: Final: THIS PERMIT MAY BE REVOKED BY THE CITY OF NORTHAMPTON UPON VIOLATION OF ANY OF ITS RULES AND REGULATIONS. Signature: 52 al f Fees Paid: $75.00 212 Main Street,Phone(413)587-1240,Fax:(413)587-1272 Office of the Building Commissioner / -S Department use only City of Northampton / F Status of Permit: Building Department ,' ea 7 Curb Cut/Driveway Permit 212 Main Street 6 Sevier/Septic Availability • Room 100 �� Water/Well Availability Northampton, MA 01060 Two Sets of Structural Plans phone 413-587-1240 Fax 413-587-127 'J '' Pfot/S4te Plans -Other"Specify APPLICATION TO CONSTRUCT,ALTER, REPAIR, RENOVATE OR DEMOLISH A ONE OR TWO FAMILY DWELLING SECTION 1 -SITE INFORMATION 1.1 Property Address: This section to be completed by office 26 Straw Ave. Map /70 Lot J3 Unit Florence, Ma 01062 Zone Overlay District Elm St.District CB District SECTION 2-PROPERTY OWNERSHIP/AUTHORIZED AGENT 2.1 Owner of Record: Irene Nicolella 26 Straw Ave. Florence, Ma 01062 Name(Print) Current Mailing Address: 413-326-4411 Telephone Signature 2.2 Authorized Agent: Name(Print) Current Mailing Address: Signature Telephone SECTION 3-ESTIMATED CONSTRUCTION COSTS Item Estimated Cost(Dollars)to be Official Use Only completed by permit applicant 1. Building 5,325 (a) Building Permit Fee 2. Electrical 10,650 (b) Estimated Total Cost of Construction from (6) 3. Plumbing Building Permit Fee 076 4. Mechanical(HVAC) 5. Fire Protection 6. Total=(1 +2 +3+4+5) 15,975 Check Number This Section For Official Use Only Building Permit Number: ib - a -'y( Date Issued: Signature: i 'Or 1 Building Commissioner/Inspector of Buildings Date SECTION 5-DESCRIPTION OF PROPOSED WORK(check all applicable) New House ❑ Addition ❑ Replacement Windows Alteration(s) Roofing n Or Doors CI Accessory Bldg. ❑ Demolition ❑ New Signs [O] Decks [Q Siding [O] Other[El] Brief Description of Proposed Work: Install roof mounted solar array of 15 panels A 5.325 kW DC Alteration of existing bedroom Yes X No Adding new bedroom_ Yes X No Attached Narrative Renovating unfinished basement Yes X No Plans Attached Roll -Sheet 6a. If New house and or addition to existing housing, complete the following: a. Use of building : One Family X Two Family Other b. Number of rooms in each family unit: Number of Bathrooms c. Is there a garage attached? d. Proposed Square footage of new construction. Dimensions e. Number of stories? f. Method of heating? Fireplaces or Woodstoves Number of each g. Energy Conservation Compliance. Masscheck Energy Compliance form attached? h. Type of construction i. Is construction within 100 ft. of wetlands? Yes No. Is construction within 100 yr. floodplain Yes No j. Depth of basement or cellar floor below finished grade k. Will building conform to the Building and Zoning regulations? Yes No . I. Septic Tank City Sewer Private well City water Supply SECTION 7a-OWNER AUTHORIZATION-TO BE COMPLETED WHEN OWNERS AGENT OR CONTRACTOR APPLIES FOR BUILDING PERMIT Irene Nicolella , as Owner of the subject property hereby authorize Nicholas Casavant to act on my behalf, in all matters relative to work authorized by this building permit application. 2/16/22 Signature of Owner Date I, Nicholas Casavant , as Owner/Authorized Agent hereby declare that the statements and information on the foregoing application are true and accurate,to the best of my knowledge and belief. Signed under the pains and penalties of perjury. Nicholas Casavant Print Name 7)2`4� � 2/16/22 Signature of Owner/Agent Date SECTION 8-CONSTRUCTION SERVICES 8.1 Licensed Construction Supervisor: Not Applicable ❑ Name of License Holder: Nicholas Casavant CS-111552 License Number 5 A St Auburn, Ma 01501 2/20/23 Address Expiration Date 617-653-9307 Signature Telephone 9. Registered Home Improvement Contractor: Not Applicable ❑ Rri ht Plan't Snlar 182102 CompanvName Registration Number 5 A St Auburn, Ma 01501 5/25/23 Address Expiration Date /24 Telephone 617-653-9307 SECTION 10-WORKERS' COMPENSATION INSURANCE AFFIDAVIT(M.G.L.c.152,§25C(6)) Workers Compensation Insurance affidavit must be completed and submitted with this application. Failure to provide this affidavit will result in the denial of the issuance of the building permit. Signed Affidavit Attached Yes P4 No 0 11. — Home Owner Exemption The current exemption for"homeowners"was extended to include Owner-occupied Dwellings of one(1) or two(2)families and to allow such homeowner to engage an individual for hire who does not possess a license,provided that the owner acts as supervisor.CMR 780, Sixth Edition Section 108.3.5.1. Definition of Homeowner:Person(s)who own a parcel of land on which he/she resides or intends to reside,on which there is,or is intended to be,a one or two family dwelling,attached or detached structures accessory to such use and/or farm structures.A person who constructs more than one home in a two-year period shall not be considered a homeowner. Such"homeowner"shall submit to the Building Official,on a form acceptable to the Building Official,that he/she shall be responsible for all such work performed under the building permit. As acting Construction Supervisor your presence on the job site will be required from time to time,during and upon completion of the work for which this permit is issued. Also be advised that with reference to Chapter 152(Workers'Compensation) and Chapter 153(Liability of Employers to Employees for injuries not resulting in Death)of the Massachusetts General Laws Annotated,you may be liable for person(s) you hire to perform work for you under this permit. The undersigned"homeowner"certifies and assumes responsibility for compliance with the State Building Code,City of Northampton Ordinances,State and Local Zoning Laws and State of Massachusetts General Laws Annotated. Homeowner Signature City of Northampton 212 Main Street, Northampton, MA 01060 Solid Waste Disposal Affidavit In accordance of the provisions of MGL c 40, S54, I acknowledge that as a condition of the building permit all debris resulting from the construction activity governed by this Building Permit shall be disposed of in a properly licensed solid waste disposal facility, as defined by MGL c 111 , S 150A. Address of the work: 26 Straw Ave. The debris will be transported by: boxtruck The debris will be received by: Waste Management Building permit number: Name of Permit Applicant Nicholas Casavant 2/16/22 Date Signature of Permit Applicant 3/4/2021 imagejpeg_0018.jpg t • IIA 46-1 Orin. m-z a -i O rOr N I!, A i D non 1f .. • *8n C N G 3 -• m �T,D N nC C a'�y ` r31OY 1• E.4:34/ O 9 iIf.N ., r n i,, ,.7'. a t.,.. i ff,Al. ..1 't' :.4 I: i n _ 6 c 1 . s d o G ' 04 na k el ' "ft..41k.A. . i ,„. Oftio) t, , .. T -4 I . .lir. lit 4 Y r fir. https://mail.google.com/mail/u/0/?tab=rm&ogbl#inbox/QgrCJHsHpCfzLVtfJhTbwZDbjGpXxfXbIwg?projector=1&messagePartld=0.1 1/1 6fi/740/M0.1(0/ 14-ad(e'(-14e/e4 Office of Consumer Affairs and Business Regulation 1000 Washington Street- Suite 710 Boston, Massachusetts 02118 Home Improvement Contractor Registration Type: Supplement Card BRIGHT PLANET SOLAR, INC. Registration: 182102 5 A STREET Expiration: 05/25/2023 AUBURN,MA 01501 Update Address and Return Card. SCA 1 is 20M-05/17 .T� UCinn7(V le °'Z'47 7y f./..<1JatlezJe/s Office of Consumer Affairs&Business Regulation HOME IMPROVEMENT CONTRACTOR Registration valid for individual use only TYPE:Supplement Card before the expiration date. If found return to: Realstratiorl Expiration Office of Consumer Affairs and Business Regulation 182102 05/25/2023 1000 Washington Street -Suite 710 BRIGHT PLANET SOLAR,INC. Boston,MA 02118 7.--)) NICK CASAUANT /41 5 A STREETlsr,.wi lG�rGGr�C AUBURN,MA 01501 Undersecretary Not valid without signature The Commonwealth of Massachusetts Department of Industrial Accidents fr Office of Investigations -44- ' Lafayette City Center _� � 2 Avenue de Lafayette, Boston,MA 02111-1750 www.mass.gov/dia Workers' Compensation Insurance Affidavit: Builders/Contractors/Electricians/Plumbers Applicant Information Please Print Legibly Name (Business/Organization/Individual):Bright Planet Solar Address:103 A Millbury St. City/State/Zip:Auburn, MA 01501 Phone #:888-997-4469 Are you an employer? Check the appropriate box: Type of project(required): 1.❑■ I am a employer with 250 4. ❑ I am a general contractor and I employees(full and/or part-time).* have hired the sub-contractors 6. El New construction 2.❑ I am a sole proprietor or partner- listed on the attached sheet. 7. ❑ Remodeling ship and have no employees These sub-contractors have 8. ❑Demolition workingfor me in anycapacity. employees and have workers' P ty 9. ❑Building addition [No workers' comp. insurance comp. insurance.: required.] 5. ❑ We are a corporation and its 10.0 Electrical repairs or additions 3.❑ I am a homeowner doing all work officers have exercised their 11.11 Plumbing repairs or additions myself. [No workers' comp. right of exemption per MGL 12.❑Roof repairs insurance required].t c. 152, §1(4),and we have no 13.1=1 OtherSOlar array employees. [No workers' comp. insurance required.] *Any applicant that checks box#1 must also fill out the section below showing their workers'compensation policy information. t Homeowners who submit this affidavit indicating they are doing all work and then hire outside contractors must submit a new affidavit indicating such. tContractors that check this box must attached an additional sheet showing the name of the sub-contractors and state whether or not those entities have employees. If the sub-contractors have employees,they must provide their workers'comp.policy number. I am an employer that is providing workers'compensation insurance for my employees. Below is the policy and job site information. Insurance Company Name: Berkshire Hathaway GUARD Policy#or Self-ins. Lic.#:R2WC209592 Expiration Date:1 2/1 8/2022 Job Site Address: 26 Straw Ave. City/State/Zip:Forence, Ma 01062 Attach a copy of the workers' compensation policy declaration page(showing the policy number and expiration date). Failure to secure coverage as required under Section 25A of MGL c. 152 can lead to the imposition of criminal penalties of a fine up to$1,500.00 and/or one-year imprisonment, as well as civil penalties in the form of a STOP WORK ORDER and a fine of up to$250.00 a day against the violator. Be advised that a copy of this statement may be forwarded to the Office of Investigations of the DIA for insurance coverage verification. I do hereby certify under a pains and penalties of perjury that the information provided above is true and correct Signature: Date: 2/16/2022 Phone#: 888-997-4469 Official use only. Do not write in this area,to be completed by city or town official. City or Town: Permit/License# Issuing Authority(check one): 11:1Board of Health 211 Building Department 31:City/Town Clerk 4.0 Electrical Inspector 5.EIPlumbing Inspector 6.0Other Contact Person: Phone#: VECTOR EFIGIFIEER s VSE Project Number: U1932.5073.221 February 16,2022 Bright Planet Solar ATTENTION:Mikey Heinz 103A Millbury St. Auburn,MA 01501 REFERENCE: Nicolella,Irene Residence:26 Straw Avenue,Northampton,MA 01062 Bright Planet Solar Project:BPS152170 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:Massachusetts State Residential Code(780 CMR Chapter 51,9th Edition(2015 IRC)) Risk Category:II Design wind speed,Vult: 117 mph(3-sec gust) Wind exposure category:C Ground snow load,Pg:40 psf Flat roof snow load,Pf:35 psf Existing Roof Structure Roof structure:2x6 rafters @ 24"o.c. Roofing material:composite shingles Roof pitch: 10:12 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 This installation uses a shared rail system.Panel Orientation:Mixture of portrait and landscape Maximum panel dimension:69.6x42 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 807.4 of the 2015 IEBC as referenced in 780 CMR Chapter 34,9th Edition 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:U1932.5073.221 Nicolella,Irene Residence ECTOR 2/16/2022 E n � i n E E R s 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. Increases in lateral forces less than 10% are considered acceptable. 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 shall be notified of any changes from the approved layout prior to installation. VECTOR STRUCTURAL ENGINEERING,LLC '(H OF 4,eijo,s4 • tiN V y �No_ 9F� PLO �Q l# �FFSS1CNAt 0`7. 02/16/2022 Jacob Proctor,P.E. MA License:54953 -Expires:06/30/2022 Project Engineer Enclosures JSP/jtg 651 W.Galena Park Blvd.,Ste. 101/Draper, UT 84020/T(801)990-1775/F(801)990-1776/www.vectorse.com JOB NO.: U1932.5073.221 SUBJECT: WIND PRESSURE E n G I n E E R S PROJECT: Nicolella, Irene Residence Components and Cladding Wind Calculations Label: Solar Panel Array Note: Calculations per ASCE 7-10 SITE-SPECIFIC WIND PARAMETERS: Basic Wind Speed [mph]: 117 Notes: Exposure Category: C Risk Category: II ADDITIONAL INPUT& CALCULATIONS: Height of Roof, h [ft]: 25 (Approximate) Comp/Cladding Location: Gable Roofs 27° < 0 <_45° Enclosure Classification: Enclosed Buildings Zone 1 GCP: 0.9 Figure 30.4-2C (enter negative pressure coefficients) Zone 2 GCP: 1.2 Zone 3 GCP: 1.2 a: 9.5 Table 26.9-1 z9 [ft]: 900 Table 26.9-1 Kh: 0.95 Table 30.3-1 Kn: 1 Equation 26.8-1 Kd: 0.85 Table 26.6-1 Velocity Pressure, qh [psf]: 28.2 Equation 30.3-1 GCP;: 0 Table 26.11-1 PRESSURES: p =q,,{(GCC)—(GCP,)j Equation 30.9-1 Zone 1, p [psf]: 26.1 psf (1.0 W, Interior Zones, beyond 'a' from roof edge) Zone 2, p [psf]: 33.4 psf (1.0 W, End Zones, within 'a' from roof edge) Zone 3, p [psf]: 33.4 psf (1.0 W, Corner Zones, within 'a' from roof corner) (a= 3 ft) • JOB NO.: U1932.5073.221 �/ E C TO R SUBJECT: CONNECTION E r1 G 1 rl E E R S PROJECT: Nicolella, Irene Residence Calculate Uplift Forces on Connection Pressure Max Trib. Max Uplift Max Trib. Width' z (0.6 Dead -0.6 Wind) Area Force (psf) (ft) (ft2) (Ibs) Zone 1 13.9 4.0 23.2 321 Zone 2 18.2 4.0 11.6 212 Zone 3 18.2 4.0 11.6 212 Calculate Connection Capacity Lag Screw Size [in]: 5/16 Cd: 1.6 NDS Table 2.3.2 Embedment3 [in]: 2.5 Grade: SPF (G = 0.42) Nominal Capacity [Ibs/in]: 205 NDS Table 12.2A Number of Screws: 1 Prying Coefficient: 1.4 Total Capacity [Ibs]: 586 Determine Result Maximum Demand [Ibs]: 321 Lag Screw Capacity [Ibs]: 586 Result: Capacity> Demand, Connection is adequate. Notes 1. 'Max Trib. Width' is the width along the panel seams tributary to the connection. 2. 'Max Trib Area' is the product of the 'Max.Trib Width' and the panel width/height perpendicular to the direction of the connection spacing.Tributary area on connections at array edges are reduced by 50%as they 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. JOB NO.: U1932.5073.221 SUBJECT: GRAVITY LOADS E n s i n E E R s PROJECT: Nicolella, Irene Residence Roof B GRAVITY LOADS Roof Pitch: ' ,� ' ek' R :12 Design material Increase due to Material weight ROOF DEAD LOAD (D) weight [psf] pitch [psf] Composite Shingles 2.6 1.30 2.0 1/2" Plywood 1.3 1.30 1.0 Framing 3.0 3.0 Insulation 0.0 0.0 1/2" Gypsum Clg. 0.0 1.30 0.0 M, E & Misc 0.0 0.0 Total Existing Roof DL 6.9 PV Array DL 3.9 1.30 3 ROOF LIVE LOAD (Lr) Existing Design Roof Live Load [psf] ASCE 7-10 Table 4-1 Roof Live Load With PV Array [psf] . 4 1. SNOW LOAD (S): Existing w/ Solar Array Roof Slope [x:12]: 10.0 10.0 Roof Slope [°]: 40 40 Ground Snow Load, pg [psf]: 40 40 ASCE 7-10, Section 7.2 Terrain Category: C C ASCE 7-10,Table 7-2 Exposure of Roof: Fully Exposed Fully Exposed ASCE 7-10,Table 7-2 Exposure Factor, Ce: 0.9 0.9 ASCE 7-10,Table 7-2 Thermal Factor, Ct: 1.1 1.1 ASCE 7-10,Table 7-3 Risk Category: II II ASCE 7-10,Table 1.5-1 Importance Factor, IS: 1.0 1.0 ASCE 7-10,Table 1.5-2 Flat Roof Snow Load, pf[psf]: 35 35 ASCE 7-10, Equation 7.3-1 Minimum Roof Snow Load, pm [psf]: 0 0 ASCE 7-10,Section 7.3.4 ,F4f 4 II';' ," , ASCE 7-10, Section 7.4 Unobstructed Slippery Surface. � ;,. ` . <Y�- �,,, Slope Factor Figure: Figure 7-2b Figure 7-2b ASCE 7-10, Section 7.4 Roof Slope Factor, CS: 0.93 0.50 ASCE 7-10, Figure 7-2 Sloped Roof Snow Load, PS [psf]: 33 18 ASCE 7-10, Equation 7.4-1 Design Snow Load, S [psf]: 33 18 • JOB NO.: U1932.5073.221 E C TO R SUBJECT: LOAD COMPARISON E n G I n E E R S PROJECT: Nicolella, Irene Residence Roof B Summary of Loads Existing With PV Array D [psf] 7 11 Lr[psf] 20 20 S [psf] 33 18 Maximum Gravity Loads: Existing With PV Array (D+ Lr)/Cd [psf] 22 25 ASCE 7-10,Section 2.4.1 (D+S)/Cd [psf] 34 25 ASCE 7-10,Section 2.4.1 (Cd=Load Duration Factor=0.9 for D,1.15 for S,and 1.25 for Lr) Maximum Gravity Load [psf]: 34 25 Ratio Proposed Loading to Current Loading: 72% 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 807.4 of the 2015 IEBC as referenced in 780 CMR Chapter 34, 9th Edition are met and the structure is permitted to remain unaltered. JOB NO.: U1932.5073.221 VE C r O SUBJECT: GRAVITY LOADS E rl G I rl E E R S PROJECT: Nicolella, Irene Residence Roof A GRAVITY LOADS Roof Pitch: " til,11 I:12 Design material Increase due to Material weight ROOF DEAD LOAD (D) weight [psf] pitch [psf] Composite Shingles 2.6 1.30 2.0 1/2" Plywood 1.3 1.30 1.0 Framing* 0.0 0.0 Insulation 0.0 0.0 1/2" Gypsum Clg. 0.0 1.30 0.0 M, E & Misc 0.0 0.0 Total Existing Roof DL 3.9 PV Array DL 3.5 1.30 3 *Self weight of framing members calculated on beam analysis page ROOF LIVE LOAD (Lr) Existing Design Roof Live Load [psf] VI:, ,ak ASCE 7-10 Table 4-1 Roof Live Load With PV Array [psf] „ O. -, SNOW LOAD (S): Existing w/ Solar Array Roof Slope [x:12]: 10.0 10.0 Roof Slope [°]: 40 40 Ground Snow Load, pg [psf]: 40 40 ASCE 7-10,Section 7.2 Terrain Category: C C ASCE 7-10,Table 7-2 Exposure of Roof: Fully Exposed Fully Exposed ASCE 7-10,Table 7-2 Exposure Factor, Ce: 0.9 0.9 ASCE 7-10,Table 7-2 Thermal Factor, Cf: 1.1 1.1 ASCE 7-10,Table 7-3 Risk Category: II II ASCE 7-10,Table 1.5-1 Importance Factor, Is: 1.0 1.0 ASCE 7-10,Table 1.5-2 Flat Roof Snow Load, pf [psf]: 35 35 ASCE 7-10, Equation 7.3-1 Minimum Roof Snow Load, pm [psf]: 0 0 ASCE 7-10, Section 7.3.4 l ' Unobstructed Slippery Surface? �K: �,� �: _��,� „,,- ASCE 7-10, Section 7.4 Slope Factor Figure: Figure 7-2b Figure 7-2b ASCE 7-10, Section 7.4 Roof Slope Factor, Cs: 0.93 0.93 ASCE 7-10, Figure 7-2 Sloped Roof Snow Load, Ps [psf]: 33 33 ASCE 7-10, Equation 7.4-1 Design Snow Load, S [psf]: 33 33 JOB NO.: U1932.5073.221 SUBJECT: LOAD COMPARISON E rl G I rl E E R S PROJECT: Nicolella, Irene Residence Roof A Summary of Loads Existing With PV Array D [psf] 4 7 Lr[psf] 20 _ 20 S [psf] 33 33 Maximum Gravity Loads: Existing With PV Array (D+ Lr)/Cd [psf] 19 22 ASCE 7-10,Section 2.4.1 (D+S)/Cd [psf] 32 35 ASCE 7-10, Section 2.4.1 (Cd=Load Duration Factor=0.9 for D,1.15 for S,and 1.25 for Lr) Maximum Gravity Load [psf]: 32 35 Maximum Member Forces: GEOMETRY Span(ft) :t,7,`-(Approximate) Solar Panel Array Start, a (ft) °gip z. ` � -�a (Approximate) Solar Panel Array Length, b (ft) ��. � :>�. ', (Approximate) Framing Spacing (ft), _ ; £ MEMBER FORCES Shear Capacity Shear Demand Ratio Vertical Reaction,Vl (Ibs) 743 351 47% OK Vertical Reaction,V2 (lbs) 743 340 46% OK Existing With PV Array Ratio Moment @ Center, M (lbs-ft) 871 914 105% 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 807.4 of the 2015 IEBC as referenced in 780 CMR Chapter 34, 9th Edition are met and the structure is permitted to remain unaltered. • DIVISION OF PROFESSIONAL LICENSURE BOARD OF ELECTRICIA ISSUES THE FOLLOWINGNS LICENSE ELECTRICAL BUSINESS BRIGHT PLANET SOLAR INC 5 A ST • AUBURN NIA 01501 2101 - qq}} i i LICE"JSE NUh�©ER FXVIRATIOD!DATE SEF1,11 NUP1HEft