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Report (42) 44sr)-01g g— vz.2-(,- f 3ci50swl,., SolarCity 3055 Clearview Way San Mateo,CA.94402 (888)-SOL-CITY f765-2489)1 www.solarcily.corn August 1,2013 Project/Job#9721567 RE: COVER LETTER Project: Scott Residence 13490 SW 129th Ave Tigard,OR 97223 To Whom It May Concern, A jobsite survey of the existing framing system was performed by an audit team from SolarCity. The attached structural calculations are based on site observations and design criteria listed below: Design Criteria: -Applicable Codes= 2010 OSISC&2010 OSSC,ASCE 7-05,and 2005 NDS -Roof Dead Load = 9 psf(All MPs) -Roof Live Load = 14 psf(All MPs) -Ground/Roof Snow Load= 25 psf -Risk Category= II,Wind Speed =95 mph, Exposure Category C -Solar modules =As indicated in attached drawings. On the above referenced project,the structural roof framing has been reviewed for loading from the PV system on the roof.The structural review,including the plans and calculations only apply to the section of roof that is directly supporting the PV system and its supporting elements.After review it was determined that the existing structure is adequate to carry the PV system loading. The structural roof framing and the new attachments that directly support the gravity loading from PV modules have been reviewed and determined to meet or exceed requirements of the 2010 OSISC&2010 OSSC. Please contact me with any further questions or concerns regarding this project. Sincerely, iikED c�'. N F�ss�o Yoo Jin Kim,P.E. Q ��7 Civil Engineer 'F Main: 888.765.2489,x5743 OR. email: ykim@solarcity.com 60N13,2pc� y,;,i;y, ..L !, IIS Digitally signed by Yoo Jin Kim Date:2013.08.01 10:41:58 -07'00' 08.01.2013 Solar City SleekMountTM PV System Version# 13.9 Structural Design Software PROJECT INFORMATION Project Name: Scott Residence Atli Tigard Job Number: 9721567 Building Code: 2010 OSISC&2010 OSSC System Size: 2.940 kW PV System Based.On: 2009 IBC/IRC Customer Name: Scott,James H ASCE Code: ASCE 7-05 Addr 13490 SW 129th Ave Upgrades'R :eq d? No City/State: Tigard, OR Stamp Req'd? Yes Zip Code 97223 PV Designer: Trudy Homer Latitude: 45.422429 Calculations: Tadei Shayo Longitude: -122.809295 Reviewer: Yoo Jin Kim, P.E. SC Office: Portland EOR: Yoo Jin Kim, P.E. MOUNTING STRUCTURE&P V SYSTEM INFORMATION Mounthig,aructure Imformatjon Risk Category II PV System Type - SolarCity SleekMountTM Roofing Material Comp Roof Tile Attachment System Tile Roofs Only NA Tile Reveal SM Span Only NA Tile Spanner Bar Direction SM Span Only NA Standing Seam Spacing SM Seam Only NA Roof Slope 40° - Rafter Spacing 24"O.C. t S € hr V Total Number of Modules 12 PV Module Orientation Landscape Spanning Vents No Total Area of Array 211 sf PV Module Width 3.2 ft PV Module Length 5.4 ft Attachment Type Coma Mount Tvoe C Minimum Eave End Setback 12" Minimum Ridge Setback 12" PV Module Weight �.� �ti2.5—psf Hardware Assembly Weight 0.5 psf Total PV System Weight 3 psf SEISMIC CONSIDERATIONS • Seismic Design Criteria (per USGS) Seismic Design Code ASCE 7-05 - Latitude 45.4224 Longitude -122.8093 SRA at Short Period Ss 0.971 SRA at is Period S USGS 1 0.347 USGS Soil Site ClassD Seismic Design Category SDC IBC 1613.5.2 Seismic Check Required(Ss>_ D USGS 0.4o&SDC>D)? Yes IBC 1613.1 ALTERATION LATERAL DESIGN 10% EXCEPTION CHECK Weight of"Proposed PV System PV System Weight 1I I 3 ' 211 sf psf 633 lbs Total Weight of PV System I_ W(pv) 633 lbs Weight°floor'on'Willing Building Sum Area of MPs with PV 836 sf Portion of Roof Weight _ A O id%Load . .f*height Roof836 sf 9.0 psf 7,524 lbs Ceiling 836 sf 6.0 psf 5,016 lbs Interior Walls(Top Half) 463 sf 6.0 psf 2,776 lbs Exterior Walls(Top Half) 463 sf 36.0 psf 16,654 lbs Net Weight of Roof Under PV W(ex;n) 31,970 lbs cI .... In s , im Wight/`Se156110 0/0 Increase of DCR of Lateral �� ` -• � Force Resisting System W(v�r)/W(exist) '2.0%5� IBC Sect. Increase Seismic Shear Load< 10%,-> [OK] 3404.4 Note: Seismic base shear is directly proportional to roof weight. CALCULATION OF DESIGN WIND LOADS Wind Design.Criteria Wind Design Code ASCE 7-05 Wind Design Method Partially/Fully Enclosed Method Basic Wind Speed V 95 mph Exposure Category C Section 6.5Fig. 6.5 Roof Style .6.3 Mean Roof Height h Gable/Hip Roof Fig.6-11B/C/D-14A/B Effective Roof Slope 25 ft Section 6.2 Effective Rafter Spacing 40 Effective Wind Area(1 Module) A 1724" O.C. 17.6 sf IBC 1509.7.1 Wind.Pressure Calculation Coefficients Wind Pressure Exposure Kz 0.95 Topographic Factor K Table 6-3 n 1.00 Section 6.5.5 .7 Wind Directionality Factor Kd 0.85 Importance Factor I Table 6-4 1.0 Table 6-1 Velocity Pressure qti qh =0.00256(Kz)(Kzt)(Kd)(VA2)(I) 18.6 psf Equation 6-15 Ext. Pressure Coefficient(Up) GCp(Up) Wil ahC 0.9a r Ext. Pressure Coefficient(Down) GCp(Down) 0.88 Fig.6-11B/C/D-14A/B Design Wind Pressure Fig.6-11B/C/D-14A/B p p=qh(GCp) Equation 6-22 Wind Pressure Up P(up) 17.7 psf Wind Pressure Down P(down) 16.3 psf ALLOWABLE ATTACHMENT SPACINGS (IN.) o Max Allowable Foot Spacing Landscape , 72"� S . 1i4#P eon Max Allowable Cantilever Landscape 24 39 A Standoff Configuration Landscape NA Max Standoff Tributary Area Trib Staggered PV Assembly Dead Load W-PV 39.sf Net Wind Uplift at Attachment T-actual 3 psf Uplift Capacity of Attachment T-allow -3 637 lbs Attachment Demand/Capacity DCR o - 499.. lbs 8/0 CALCULATION OF ROOF DEAD AND LIVE LOADS Roof Dead.Load Material Lead< Roof Category Description All MPs Roofing Material Comp Roof #of Layers 2 5.0 psf Underlayment Roofing Paper Plywood Sheathing 0.5 psf Board Sheathing Yes 1.5 psf None 0.0 psf Rafter Size and Spacing 2 x 4 @ 24 in.O.C. 0.7 psf Vaulted Ceiling None 0.0 psf Miscellaneous Miscellaneous Items 1.3 psf Total Roof Dead Load _ 9 psf(All MPs) 9.0 psf Reduced Reef Live Load Symbol , Valee ASCE 7.05 Roof Live Load L0 20.0 psf Table 4-1 Member Tributary Area At <200 sf Roof Slope 10/12 Tributary Area Reduction R1 1 Sloped Roof Reduction R Section 4.9 R2 0.7 Section 4.9 Reduced Roof Live Load Lr Lr= L0(R1)(R2) Reduced Roof Live Load Lr 14 psf(All MPs) Equation.4-2 14.0 psf Ceiling headLoad Material Lad Ceiling Joist Size and Spacing 2 x 4 @ 24 in. O.C. 0.7 psf Insulation Yes 1.4 psf Finish 1/2"Gypsum Board Miscellaneous 2.2 psf Miscellaneous Items 1.7 psf Total Ceiling Dead Load 6.0 psf a F 0 R T E ' MEMBER REPORT Level,MP1 PASSED 1 piece(s) 2 x 4 Douglas Fir-Larch No. 2 @ 24"OC Overall Sloped Length:21'1 9/16" + o + _ a 1 � 10.1i I 11 r p II ! 11'S 2'10' 2' ii 4' fil S'T 4 NI All locations are measured from the outside face of left support(or left cantilever end).All dimensions are horizontal. Design Results Actual u Location Allowed Result LDF Load:Combination(Pattern) System:Roof Member Reaction(lbs) 456 @ 10'3" 2916(3.50") Passed(16%) -- 1.0 D+1.0 S(Adj Spans) Member Type:Joist Shear(lbs) 217 @ 10'7 7/16" 725 Passed(30%) 1.15 1.0 D+1.0 S(Adj Spans) Building Use:Residential Moment(Ft-lbs) -223 @ 10'3" 456 Passed(49%) 1.15 1.0 D+1.0 S(Adj Spans) Building Code:IBC Live Load Defl.(in) 0.123 @ 13'3" 0.361 Passed(L/706) -- 1.0 D+1.0 S(Alt Spans) Design Methodology:ASD Total Load Defi.(in) 0.173 @ 13'3 5/16" 0.481 Passed(1/500) -- 1.0 D+1.0 S(Alt Spans) Member Pitch:10.1/12 • Deflection criteria:LL(L/240)and TL(1/180). •Overhang deflection criteria:LL(21/240)and TL(21/180). • Bracing(Lu):All compression edges(top and bottom)must be braced at 20'10 5/8"o/c unless detailed otherwise.Proper attachment and positioning of lateral bracing is required to achieve member stability. •A 15%increase in the moment capacity has been added to account for repetitive member usage. •Applicable calculations are based on NDS 2005 methodology. Bearing Length Loads to Supports(lbs) Supports Total Available Required Dead Snow Total Accessories 1-Beveled Plate-SPF 3.50" 3.50" 1.50" 96 155 251 Blocking 2-Beveled Plate-SPF 3.50" 3.50" 1.50" 64 145 209 None 3-Beveled Plate-SPF 3.50" 3.50" 1.50" 85 162 247 None 4-Beveled Plate-SPF 3.50" 3.50" 1.50" 158 298 456 None 5-Beveled Plate-SPF 3.50" 3.50" 1.50" 56 124 180 Blocking •Blocking Panels are assumed to carry no loads applied directly above them and the full load is applied to the member being designed. Dead Snow Loads Location Spacing (0.90) (1.15) Comments 1-Uniform(PSF) 0 to 15'11 3/4" 24" 9.0 25.0 Roof 2-Uniform(PSF) 0 to 10'8" 24" 3.0 - Weyerhaeuser Notes OWeyerhaeuser warrants that the sizing of its products will be in accordance with Weyerhaeuser product design criteria and published design values. SUSTAINABLE FORESTRY INITIATIVE Weyerhaeuser expressly disclaims any other warranties related to the software.Refer to current Weyerhaeuser literature for installation details. (www.woodbywy.com)Accessories(Rim Board,Blocking Panels and Squash Blocks)are not designed by this software.Use of this software is not intended to circumvent the need for a design professional as determined by the authority having jurisdiction.The designer of record,builder or framer is responsible to assure that this calculation is compatible with the overall project.Products manufactured at Weyerhaeuser facilities are third-party certified to sustainable forestry standards. The product application,input design loads,dimensions and support information have been provided by Forte Software Operator Forte Software Operator Job Notes 8/1/2013 10:35:28 AM Forte v4.1,Design Engine:V5.7.0.245TadaShay() SolarCity (650)963 5100 Scett.4te tshayo@solarcity.com - -- �agclofl a F O R T E MEMBER REPORT Level,MP2 PASSED 1 pieces) 2 x 4 Douglas Fir-Larch No. 2 @ 24" OC Overall Sloped Length:28'313/18" o + 0 12 i i 10.1F e. ' u ' II2' T4' I 6'6. ii 6,4' El All locations are measured from the outside face of left support(or left cantilever end).All dimensions are horizontal. Design Results Actual 0 Location Allowed Result LDF Load:Combination(Pattern) System:Roof Member Reaction(lbs) 588 @ 8'6" 2916(3.50") Passed(20%) -- 1.0 D+1.0 S(Adj Spans) Member Type:Joist Shear(lbs) 295 @ 8'1 9/16" 725 Passed(41%) 1.15 1.0 D+1.0 S(Adj Spans) Building Use:Residential Moment(Ft-lbs) -392 @ 8'6" 456 Passed(86%) 1.15 1.0 D+1.0 S(Adj Spans) Building Code:IBC Live Load Defl.(in) 0.395 @ 4'7 1/16" 0.479 Passed(1/291) -- 1.0 D+1.0 S(Alt Spans) Design Methodology:ASD Total Load DeFl.(in) 0.569 @ 4'6 5/8" 0.639 Passed(L/202) -- 1.0 D+1.0 S(Alt Spans) Member Pitch:10.1/12 • Deflection criteria:LL(1/240)and TL(14180). •Overhang deflection criteria:LL(21/240)and TL(21/180). • Bracing(Lu):All compression edges(top and bottom)must be braced at 10'1 5/16"o/c unless detailed otherwise.Proper attachment and positioning of lateral bracing is required to achieve member stability. •A 15%increase in the moment capacity has been added to account for repetitive member usage. •Applicable calculations are based on NDS 2005 methodology. Bearing Length Loads to Supports(lbs) Supports Total Available Required Dead Snow Total Accessories 1-Beveled Plate-SPF 3.50" 3.50" 1.50" 115 219 334 Blocking 2-Beveled Plate-SPF 3.50" 3.50" 1.50" 186 402 588 None 3-Beveled Plate-SPF 3.50" 3.50" 1.50" _ 159 363 522 None 4-Beveled Plate-SPF 3.50" 3.50" 1.50" 65 145 210 Blocking •Blocking Panels are assumed to carry no loads applied directly above them and the full load is applied to the member being designed. Dead Snow Loads Location Spacing (0.90) (1.15) Comments 1-Uniform(PSF) 0 to 21'5 3/4" 24" 9.0 25.0 Roof 2-Uniform(PSF) 1'3"to 3'9" 24" 3.0 - Weyerhaeuser Notes SUSTAINABLE FORESTRY INITIATIVE Weyerhaeuser warrants that the sizing of its products will be in accordance with Weyerhaeuser product design criteria and published design values. ��Yii Weyerhaeuser expressly disclaims any other warranties related to the software.Refer to current Weyerhaeuser literature for installation details. (www.woodbywy.com)Accessories(Rim Board,Blocking Panels and Squash Blocks)are not designed by this software.Use of this software is not intended to circumvent the need for a design professional as determined by the authority having jurisdiction.The designer of record,builder or framer is responsible to assure that this calculation is compatible with the overall project.Products manufactured at Weyerhaeuser facilities are third-party certified to sustainable forestry standards. The product application,input design loads,dimensions and support information have been provided by Forte Software Operator Forte Software Operator --_ Job Nobs 8/1/2013 10:21:01 AM radai Shayo Forte v4i.1,Design Engine:V5.7.0.245 SolarCily (650)963 5100 SCOIt.�tE tshayo@solarcity.com Page 1of1