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HomeMy WebLinkAboutSOLR-20-1706 •. . City of Arcadia, CA Permit NO.SOLR-20-1706 Development Services Department Permit Type:Solar 240 West Huntington Drive,Post Office Box 60021 Work Classification:Solar- Residential Arcadia,CA 91066-6021 (626)574-5416 Permit Status:Issued ARCADIA Issue Date:10/19/2020 Expiration: 10/19/2021 Addr NO. Dir Prefix Street Name Street Suffix Unit City,State,Zip Parcel Number 2123 BELLA VISTA AVE Arcadia,CA 91007-8106 5787002053 Contacts YANG CHENG AND QUN WU Owner LA SOLAR GROUP INC* Contractor 2123 Bella Vista,Arcadia,91007 16238 RAYMER ST B,VAN NUYS,91406 (626)254-0320 (818)455-9293 974115 Leaswwwwwwwwwww Description:ROOF MOUNT PV SYSTEM, 15 MODULES/MICRO Valuation: $ 0.00 Tenant INVERTERS,COMBINER BOX Total Sq Feet: 0.00 Plan Check# Plan# Fees Amount Payments Amount Paid Building Plan Check Fee Residential $100.00 Total Fees $324.72 Distribution Panel $16.48 Cash/Receipt#REC-05801-20 $324.72 Electrical Permit Issuance Fee $47.01 Amount Due: $0.00 Inverters $77.78 Panels $82.45 Solid Waste Management Fee 2 $1.00 Total: $324.72 (2.10 2-t, G CALLS FOR INSPECTIONS Request for inspection by telephone at 626-574-5450. Leave a message requesting the address,timeframe and what inspection item is needed. ()PITO- InLliiT This permit/plan review expires by time limitation and becomes null and void if the work authorized by the permit is not commenced within 180 days from the date of issuance or if the permit is not obtained within 180 days from the date of plan submittal.This permit expires and becomes null and void if any work authorized by this permit is suspended or abandoned for 180 consecutive days or if no progressive work has been verified by a City of Arcadia building inspector for a period of 180 consecutive days. October 19, 2020 Issued By: Date October 19,2020 Page 1 of 1 •FA• 4.`01:0R.u�a 04 ..11631!, PERMIT/PLAN REVIEW APPLICATION .4412. ris °��iw s, Development Services Department,240 West Huntington Drive, Post Office Box 60021 Arcadia, CA 91066-6021, (626) 574-5416, Fax (626)447-9173 City of Arcadia LICENSED CONTRACTOR'S DECLARATION WORKERS'COMPENSATION DECLARATION ❑ I hereby affirm under penalty of perjury that I am licensed under provisions of I hereby affirm under penalty of perjury one of the following: Chapter 9(commencing with Section 7000,of Division 3 of the Business and Professions Code,and my license is in full force and effect. ❑ I have and will maintain a certificate of consent to self-insure for workers' License Class' :O�(-,96 X License No. 17///,' Exp. Dater 22 compensation, as provided for by Section 3700 of the Labor Code, for the performance of the work for which this permit is issued. Signature of Contractor OWNER-BUILDER DECLAR N al have and will maintain workers'compensation insurance,as required by Section ❑ I hereby affirm under penalty of perjury that I am exempt from the Contractors 3700 of the Labor Code,for the performance of the work for which this permit License Law for the following reason(Section 7031.5,Business and Professions is issued.Mrk 'co/mpensation insurance carrier and policy numbers are: Code.Any city or county which requires a permit to construct,alter,improve, Carrier , demolish,or repair any structure,prior to its issuance,also required the applicant ���/(l'/2 for such permit to file a signed statement that he or she is licensed pursuant to the Policy Number T provisions of the Contractors License Law(Chapter 9(commencing with Section (This section need not be completed if the permit is for one hundred dollars or less) 7000)of Division 3 of the Business and Professions Code)or that he or she is exempt there from and the basis for the alleged exemption. Any violation of ❑ I certify that in the performance of the work for which this permit is issued,I shall Section 7031.5 by any applicant for a permit subjects the applicant to a civil not employ any person in any manner so as to become subject to the workers' penalty of not more than five hundred dollars($500)): compensation Laws of California,and agree that if I should become subject to the workers'compensation provisions of Section 3700 of the Labor Code,I shall ❑I, as owner of the property, or my employees with wages as their sole forthwith co ply ith those provisions. compensation,will do the work,and the structure is not intended or offered for /o�� o Signatu e>� sale(Section 7044,Business and Professions Code:The Contractors License Date Law does not apply to an owner of property who builds or improves thereon, or who does such work himself or herself or through his or her own employees,provided that such improvements are not intended or offered for WARNING: Failure to secure Workers'Compensation coverage is unlawful, sale.If,however,the building or improvement is sold within one(1)year of and shall subject an employer to criminal penalties and civil fines up to one completion,the owner-builder will have the burden of proving that he or she hundred thousand dollars($100,000),in addition to the cost of compensation, J did not build or improve for the purpose of sale). damages as provided for in Section 3706 of the Labor Code, interest, and attorney's fees. ❑I, as owner of the property, am exclusively contracting with licensed contractors to construct the project(Section 7044, Business and Professions Code:The Contractors License Law does not apply to an owner of property CONSTRUCTION LENDING AGENCY who builds or improves thereon,and who contracts for such projects with a I hereby affirm under penalty of perjury that there is a construction lending agency contractor(s)licensed pursuant to the Contractors License Law). for the performance of the work for which this permit is issued (Section 3097, Civil Code). ❑ I am exempt under Section 7044,Business and Professions Code,for this reason: Lender's Name Date Signature Lender's Address IMPORTANT: APPLICATION IS HEREBY MADE TO THE BUILDING OFFICIAL FOR A PERMIT SUBJECT TO THE CONDITIONS AND RESTRICTIONS SET FORTH ON THIS APPLICATION AND THE FOLLOWING: 1. The City's approved plans and permit inspection card must remain on the job site for use by City inspection personnel. 2. Final inspection of the work authorized by this permit is required.A Certificate of Occupancy must be obtained prior to use and occupancy of new buildings and structures. 3. Per South Coast Air Quality Management District(AQMD)regulations,renovation and remodeling work that results in the removal,stripping,or altering of asbestos containing materials requires an asbestos survey and removal prior to disturbing the asbestos. Please contact AQMD at(909)396-2000 for further information. I Name "41!`f r.,JGCI �`2Title PRINT NA I certify that I have read this application and state that the above information is correct and that I am the owner or duly authorized agent of the owner. I agree to comply with all City ordinances and State Laws relating to building construction. I hereby authorize representatives of the City of Arcadia to enter upon the above-mentioned property for inspection purposes. // 7�Si nature J Date 7 N Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 Te1:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com Structural Calculations for a Roof Mounted Solar Photovoltaic System for: Yang Cheng Residence o 2123 Bella Vista Ave., ��t,,,,a(\'`'��ah Arcadia, CA 91007 �u �a�t�\!i�U of ao>El� � tJtUrlS�t\�' �+,Ul\ , NI oV• S Applicable Codes: ,t,�vP�° u�r'>t,�'JJt',o tv:1J'!t\;,,`�,,.«t��\\\� o o, au\3,.„0001T N`‘`x`101 ,��w votg 2019 California Building Code, 2`�1'� ,,Ga1�t�c rri -�ec• tnc Code, 2019 California Mechanical Code,Ate'fO,parr'80 'o'f,,Civ�il' ngineers Standard ASCE 7-16 Minimum Desi\j'lei toad' Qr;Bui(�dings and Other Structures, American Wood Council 2010,Id Orxit design Specification for Wood Construction, Local Municipal Code, and all other codes which are adopted by reference or enacted by law. Assumed Design Parameters: The existing structure has been built under a building permit and is in its original condition. The existing roof structure is capable of its code required live load and the ability of the roof structure to support live loads has not been substantially reduced by the age of the structure, termites or mold, or unauthorized modifications to the existing structure. Solar Energy Contractor shall make an inspection of the existing roof framing system prior to installation of the roof mounted solar energy system to verify that the existing roof is capable of supporting minimum roof live loads. Assumed Design Parameters: okoFESSIo,, co 6k orn All 2x members are grade Douglas Fir #2 or better No. C58724 All 4X members are grade Douglas Fir #1 or better * Exp.3-31-21 All Roof Connectors are Simpson Strong-Tie or Equal s�T ci +L ��P All Concrete Foundations are fc = 2500 psi or stronger FOF CA1�Fo� Original Structure was built to the Type-V Wood Framed Standards of the Applicable Building Code at the time of Construction. Sht # 1 of 6 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 Tel:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com Note to Building Official: Based upon a review of the proposed plans I am confident that the existing roof framing system is capable of safely supporting the additional loads caused by the new solar photovoltaic energy system. Solar Energy Contractor shall make an inspection of the existing roof framing system prior to installation of the roof mounted solar energy system to verify that the existing roof is capable of supporting minimum roof live loads. Attached in this package are several calculations showing that the roof members can support the additional weight of the solar array. Furthermore, an analysis of the solar array's support for wind forces and a seismic analysis of the existing structure are also included. Check Existing 2x6 Roof Trusses @ 24" O.C.: * W DL+LL WDL+LL = 36.9psfx2ft. = 73.8plf w DL = 16.9 psf x 2 ft. = 31.6 plf L R1 R2 20' `�1 )FESS-104- Total load on Trusses = 73.8 plf x 20 ft. = 1 ,476 lbs - . ' , co o c� m No. C58724 * Exp.3-31-21 *' `P�' �IV1�- TF OF c AtOS)' *Note: Contractor to Field Verify Framing Sht # 2 of 6 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 Te1:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com Check Existing 2x6 Roof Trusses @ 24" O.C.: P P 7 7 7 W LL Illlllll I I II W DL F'/////////////////////////////.I W DL+LL = 36.9 psf x 2 ft. = 73.8 plf w DL = 16.9 psf x 2 ft. = 31.6 plf R1 R2 20' 2' 11' �- 7' Total load on truss = 71.6 plf x 9 ft + 31.6 plf x 11 ft + ( 6' x 2.75' x 3 psf x 4 ) = 1,234 lbs < 1 ,476 lbs OK Check attachment of Support to Existing Structure for Wind Uplift CHECK SOLAR STRUCTURE ATTACHMENTS PER ASCE 7- 16WIND LOADS ON BUILDING APPURTENANCES AND OTHER STRUCTURES Section 29.4.4 THEREFORE CHECK ATTACHMENT FOR TYPICAL CRITICAL LOAD WHICH IS THE EDGE ZONE - ZONE 2. NOTE: PER DEFINITION ON SHEETS 246 & 247 OF ASCE 7- 16 EFFECTIVE WIND AREA: "FOR ROOFTOP SOLAR ARRAYS, THE EFFECTIVE WIND AREA IN FIG. 29.4-7 IS EQUAL TO THE TRIBUTARY AREA FOR THE STRUCTURAL ELEMENT BEING CONSIDERED, EXCEPT THAT THE WIDTH OF THE EFFECTIVE WIND AREA NEED NOT BE LESS THAN ONE-THIRD ITS LENGTH." ;ROF ESS 04N EFFECTIVE AREA = 15 SQ FT M o ," c\ gc, z No. C58724 * Exp.3-31-21 Civl T4'OFCAt\ g3' Sht # 3 of 6 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 Te1:1 .310.464.1804 Email: Ioydwmartin@gmail.com www.loydwmartin.com Check attachment of Support to Existing Structure for Wind Uplift - Cont'd Tributary Area to Each Solar Mount = 6 ft. x 2.75 ft. = 16.5 sq. ft. ( Max ) Calculate Design Wind Pressure at each support (Wind Speed 110 mph Exposure C): p =gh(GCS,)(YE)(7a) Eq'n 29.4- 7 ASCE 7- 16 q1, = 0.00256 Kz Kzt Kd Kell` Eq'n 26.10- 1 ASCE 7- 16 Note: KZ = velocity pressure coefficient Section 29.10.1 ASCE 7- 16 KZ = 0.9 (Exposure C, Height = 20 ft or less) Kzt = Topographical Factor = 1 .0 Kd = Wind Directionality Factor = 0.85 Ke = Ground Elevation Factor = 1.0 V = 110 mph ; VAso= 85 mph Table 1609.3.1 2019 CBC .�oe�°FEss/oNq� w. , q/, = 0.00256 (0.9) (1 .0) (0.85) (1.0) (85)2 co oNo. C58724 q/, = 14.15 psf * Exp.3-31-21 GCp = -2.0 (Zone 2 ; Effective Area = 15 sq. ft. ) �9TF oF�c A`\F°� YE = Exposure Factor = 1.5 Ya = Solar Array Pressure Equalization Factor = 0.7 Fig. 29.4-8 ASCE 7- 16 p =q,1(GCp)(YE)(Yu) p = 14.15 psf (-2.0) (1 .5) (0.7) = 29.7 psf Nominal (Unfactored) Uplift at each support = 29.7 psf x 16.5 sq. ft. = 491 lbs Note: Section 2.4.1 of ASCE 7- 16, Basic Load Combinations for Allowable Stress Design. Note: Applicable Load Combination #5 : D + 0.6W Dead Load = 3 psf Wind Load = 29.7 psf Sht # 4 of 7 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 Te1:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com Check attachment of Support to Existing Structure for Wind Uplift - Cont'd Design (Factored) Load at each support: 3 psf + (0.6 x 29.7 psf) = 20.8 psf where: Y = Distance between 2 lag screws = 1 .75" Y' = Moment arm to 1st lag screw yolk = 6.4 �••: 1;01F ESS/04, • No. C58724 * Exp.3-31-21 * Moment due to Load = (20.8 psf x 16.5 sq. ft.) x 6.4 inches )2177 clv"- = 2,200 in-Ib Load to lag screw = 2,200 in-lb / 1 .75 = 1 ,257 lbs Determine allowable load per 5/16" lag screw w/ 3.25" embedment into wood below according to the 2018 NDS. W ' = WxCdxCt Table 10.3.1 2018 NDS where: W = 266 lbs / in. of embedment per Table 12.2a Cd = 1.6 per Table 2.3.2 of 2018 NDS Ct = 1.0 per Table 10.3.4 of 2018 NDS W ' = 266 lbs/ in. x 3.25 in. x 1.6 x 1 .0 = 1,383 lbs > 1 ,257 lbs OK OK. Use Tile Hooks with (2) 5/16" x 3.5" Lag Screws with 3.25" min. embedment into wood, at 72" O.C. max, as per Plans to Manufacturer's instructions. Sht # 5of7 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 • Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 Te1:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com Check Seismic load due to added dead load of photovoltaic system. Determine Seismic Weight of Existing Building: Effective Existing Seismic Weight Area of (E) Building = Approximately 1 ,900 Sq. ft. Approximate Effective = 1 ,900 sq. ft. x 30 psf ave. = 57,000 LBS Seismic Weight DETERMINE BASE SHEAR okoFESS/04,91 V Cs W EQ'N 12.8- 1 ASCE 7- 16 WM4r� F� 0 No. C58724 g CsDS EQ'N 12.8-2 ASCE 7- 16 * Exp.3-31-21 e of Cp0 R = THE RESPONSE MODIFICATION FACTOR IN TABLE 12.2-1 R = 6.5 WOOD SHEAR WALLS le = 1 .0 IMPORTANCE FACTOR SpS = 2/3 x SMS EQ'N 11 .4-3 ASCE 7- 16 SMS= FA x Ss EQ'N 11.4- 1 ASCE 7- 16 SMS = 1 .0 x 1.5 = 1 .5 SpS = 2/3 x 1.5 = 1 .0 1 .0 Cs = 65 = 0.154 EQ'N 12.8-2 ASCE 7- 16 1 Sht # 5 of 6 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 TeI:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com EXISTING BASE SHEAR V = 0.154 x 57,000 LBS = 8,778 LBS EQ'N 12.8- 1 ASCE 7- 16 DETERMINE NEW BASE SHEAR Determine Seismic Weight of Building with Solar Array: EXISTING F_PROF ESSl0,ygl SEISMIC = 57,000 LBS o �y WEIGHT No. C58724 g NEW SOLAR Exp.3-31-21 ARRAY = 3 PSF x 15 PANELS x 3.3' x 5.5' = 817 LBS gTFOFcal�F°��\P NEW SEISMIC = 57,000 LBS + 817 LBS = 57,817 LBS WEIGHT THEREFORE NEW BASE SHEAR: V = 0.154 x 57,817 = 8,904 LBS EQ'N 12.8- 1 ASCE 7- 16 % CHANGE = -- 8,904 LBS - 8,778 LBS x 100 = 1 .4 % < 10% OK 8,778 LBS OK. PER ASCE 7-16 SECTION 11.B.3 ALTERATIONS EXISTING LATERAL FORCE RESISTING SYSTEM IS EXEMPT FROM ANALYSIS SINCE NEW SEISMIC FORCE IS LESS THAN 10% GREATER THAN EXISTING SEISMIC FORCE. "Alterations are permitted to be made to any structure without requiring the existing structure to comply with this standard provided the alterations comply with the requirements for a new structure. Alterations that increase the seismic force in any existing structural element by more than 10 percent or decrease the design strength of any existing structural element to resist seismic forces by more than 10 percent shall not be permitted unless the entire seismic force-resisting system is determined to comply with this standard for a new structure." End of Calculations Sht # 6of6 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020 I • Loyd W. Martin Professional Engineer, Inc. 9924 Universal Boulevard #224-406 Orlando, FL 32819 TeI:1 .310.464.1804 Email: loydwmartin@gmail.com www.loydwmartin.com Determine Loading on Roof Trusses Dead and Live Loads without Panels: Tile Roofing = 8.0 psf 1/2 Sheathing = 1 .5 psf 2x6 Trusses @ 24" O.C. = 2.5 psf Q�oFESSIoy 5/8" Drywall = 3.1 psf •<° - w. Mi q� Misc. / Insul = 1 .0 psf �o 0 No. C58724 Dead Load = 16.0 psf * Exp.3-31-21 * w/ DL Corr. (1 .05) = 16.9 psf yrF oFl 0°'�\P Live Load = 20.0 psf Total Load = 36.9 psf Dead Loads with Panels: Tile Roofing = 8.0 psf 1/2 Sheathing = 1 .5 psf 2x6 Trusses @ 24" O.C. = 2.5 psf 5/8" Drywall = 3.1 psf Misc. / Insul = 1.0 psf Dead Load = 16.0 psf w/ DL Corr. (1 .05) = 16.9 psf Total Load = 16.9 psf Solar Array = 3.0 psf (Note: Solar Loads are point loads on members) Total Load with Solar Array = 19.9 psf < 36.9 psf OK Sht #R1 2020-2616 Solar Journey Yang Cheng Residence Date: October 14, 2020