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Report (41) /til5 T-7-v13 - Uc 24 SolarCity pRo �n • 3055 Clearnew Way ��,�`� �v San Mateo,CA.94402 cR�� C INFEv/O2* {8881-SOL-CITY(765-2489}I www.solarcity.com 7 60PE 9 August 15,2013 `'`" Project/Job#9721606 • y OREGONtb -4 Gly 09 9.0% • RE: COVER LETTER /R MASS° Himmelwright Residence 8855 SW Hamlet St Tigard,OR 97224 Digitally signed by Amir Massoumi Date: 2013.08.15 14:37:25 -07'00' 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 = 20 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, Amir Massoumi, P.E. Civil Engineer Direct: 650.963.5611 email: amassoumi@solarcity.com 08.15.2013 SolarCity SleekMountTM PV System Version# 13.9 Structural Design Software PROJECT INFORMATION' Project Name: Himmelwright Residence AHJ: Tigard Job Number: 9721606 Building Code: 2010 OSISC&2010 OSSC System Size: 9.500 kW PV System Based On 2009 IBC/IRC Customer Name: Himmelwright, Robert ASCE Code: ASCE 7-05 Address 8855 SW Hamlet St Upgrades Req'd? No City/State: Tigard, OR Stamp Req'd? Yes Zip Code 97224 PV Designer Fenny Kasuma Latitude: 45.407155 Calculations: Jake Bauer Longitude -122.768183 Reviewer Amir Massoumi,P.E. SC Office: Portland EOR: Amir Massoumi, P.E. MOUNTING STRUCTURE& P V SYSTEM INFORMATION Mounting Structure Information Risk Category II PV System Type SolarCity SleekMount•M 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 18° Rafter Spacing 24"O.C. PV System Information Total Number of Modules 38 PV Module Orientation Landscape Spanning Vents No Total Area of Array 669 sf PV Module Width 3.3 ft PV Module Length 5.4 ft Attachment Type Como Mount Tvoe C Minimum Eave End Setback 12" Minimum Ridge Setback 12" PV System Weight PV Module Weight 2.5 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 45.4072 Longitude -122.7682 SRA at Short Period Ss 0.944 USGS SRA at is Period S1 0.338 USGS Soil Site Class D IBC 1613.5.2 Seismic Design Category SDC D USGS Seismic Check Required(Ss 0.4o&SDC z D)? Yes IBC 1613.1 ALTERATION LATERAL DESIGN 10% EXCEPTION CHECK Weight of Proposed PV System PV System Weight Area Dead Load Weight 669 sf 3 psf 2008 lbs Total Weight of PV System W(pv) 2008 lbs Weight of Roof on Existing Building Sum Area of MPs with PV 1450 sf Portion of Roof Weight Area Dead Load Weight Roof 1,450 sf 9.0 psf 13,050 lbs Ceiling 1,450 sf 6.0 psf 8,700 lbs Interior Walls(Top Half) 600 sf 6.0 psf 3,600 lbs Exterior Walls(Top Half) 600 sf 11.0 psf 6,600 lbs Net Weight of Roof Under PV IN(exist) 31,950 lbs Check%Increase of Roof Weight/Seismic Shear Load WO Increase of DCR of Lateral6.3% Force Resisting System W(%►)I W("1st) 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 6.5.6.3 Roof Style Gable Roof Fig.6-11B/C/D-14A/B Mean Roof Height h 14 ft Section 6.2 Effective Roof Slope 18° Effective Rafter Spacing 24"O.C. Effective Wind Area(1 Module) A 17.6 sf IBC 1509.7.1 Wind Pressure Calculation Coefficients Wind Pressure Exposure KZ 0.85 Table 6-3 Topographic Factor KA 1.00 Section 6.5.7 Wind Directionality Factor Kd 0.85 Table 6-4 Importance Factor I 1.0 Table 6-1 Velocity Pressure qn qh = 0.00256(Kz)(Kzt)(Kd)(V^2)(I) Equation 6-15 16.7 psf Wind Pressure Ext. Pressure Coefficient(Up) GCp(up) -0.88 Fig.6-11B/C/D-14A/B Ext. Pressure Coefficient(Down) GCp(w„ 0.45 Fig.6-11B/C/D-14A/B Design Wind Pressure p p = qh(GC v) Equation 6-22 Wind Pressure Up Pcup) -14.6 psf Wind Pressure Down Pcdown) 10.0 psf ALLOWABLE ATTACHMENT SPACINGS (IN.) X-Direction V-Direction Max Allowable Foot Spacing Landscape 72" 39" Max Allowable Cantilever Landscape 24" NA Standoff Configuration Landscape Staggered Max Standoff Tributary Area Trib 20 sf PV Assembly Dead Load W-PV 3 psf Net Wind Uplift at Attachment T-actual -252 lbs Uplift Capacity of Attachment T-allow 637 lbs Attachment Demand/Capacity DCR 39.5% CALCULATION OF ROOF DEAD AND LIVE LOADS Roof Dead Load Material Load Roof Category Description All MPs Roof Roofing Comp Roof 5.0 psf Layers2 Underlayment Roofing Paper 0.5 Plywood Sheathing psf Yes 1.5 psf Board Sheathing None 0.0 psf Rafter Size and Spacing 2 x 4 @ 24 in.O.C. 0.7 psf Vaulted Ceiling None Miscellaneous 0.03 psf 1 Miscellaneous Items 1.3 psf Total Roof Dead Load 9 psf(All MPs) 9.0 psf Reduced Roof Live Load Symbol Value ASCE 7-05 Roof Live Load Lo 20.0 psf Table 4-1 Member Tributary Area At <200 sf Roof Slope 4/12 Tributary Area Reduction R1 1 Section 4.9 Sloped Roof Reduction R2 1 Section 4.9 Reduced Roof Live Load Lr Lr= La(R1)(R2) Equation 4-2 Reduced Roof Live Load Lr 20 psf(All MPs) 20.0 psf Ceiling Dead Load Material Load 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 2.2 psf Miscellaneous, Miscellaneous Items 1.7 psf Total Ceiling Dead Load 6.0 psf Interior Walls , Material Load Finish(Side A) 1/2"Gypsum Board Wall Studs 2.2 psf 2 x 4 @16in.O.C. 1.1 psf Insulation Finish(Side B) 1/2 Gypsum Board No 2.2 psf Miscellaneous 0.5 psf Miscellaneous Items 0.5 psf Total Interior Wall Load _ 6.0 psf Exterior Walls Material Load Exterior Finish Wood Siding sf Wall Studs 2 x 4 @ 16 in.O.C. 5.01 psf Insulation Yes psfInterior Finish 1/2"Gypsum1.2 psf Miscellaneous Board 2.2 psf Miscellaneous Items 1.3 psf Total Exterior Wall Load 11.0 psf MEMBER REPORT 9721606,MP1 PASSED �/J F O R T E 1 piece(s) 2 x 4 Douglas Fir-Larch No. 1 @ 24" OC Overall Sloped Length:18'4 118' o + _ o 1,— u I 1, 2'Y 4, 7' 1, 8' 0 All locations are measured from the outside face of left support(or left cantilever end).All dimensions are horizontal. Design Results Actual©Location Allowed Result LDF Load:Combination(Palm) System:Roof Member Reaction(lbs) 669 @ 9'2" 3459(3.50") Passed(19%) -- 1.0 D+1.0 S(Adj Spans) Member Type:Joist Shear(lbs) 329 @ 9'7 1/16" 725 Passed(45%) 1.15 1.0 D+1.0 S(Adj Spans) Building Use:Residential Moment(Ft-lbs) -493 @ 9'2" 506 Passed(97%) 1.15 1.0 D+1.0 S(Adj Spans) Building Code:IBC Live Load Def.!.(in) 0.337 @ 13'5 5/16" 0.418 Passed(L/298) -- 1.0 D+1.0 S(Alt Spans) Design Methodology:ASD Total Load Deft(in) 0.483 @ 13'5 11/16" 0.558 Passed(L/208) -- 1.0 D+1.0 S(Alt Spans) Member Pitch:4/12 • Deflection criteria:LL(L/240)and TL(L/180). •Overhang deflection criteria:LL(2L/240)and TL(21/180). • Bracing(Lu):All compression edges(top and bottom)must be braced at 3'11 9/16"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(iba) Supports Total Available Required Dead Snow Total Accessories 1-Beveled Plate-DF 3.50" 3.50" 1.50" 94 269 363 Blocking 2-Beveled Plate-DF 3.50" 3.50" 1.50" 213 456 669 None 3-Beveled Plate-DF 3.50" 3.50" 1.50" 78 177 255 Blocking •Blocking Panels are assumed to carry no loads applied directly above them and the full load is applied to the member being designed. Loads Dead Snow Location Spacing (0.90) (1.15) Comments 1-Uniform(PSF) 0 to 17'3 3/4" 24" 9.0 Roof DL 2-Uniform(PSF) 0 to 17'3 3/4" 24" - 25.0 Roof SL 3-Uniform(PSF) 7'to 15'11" 24" 3.0 - PV Attachment DL Weyerhaeuser Notes ^ T•SUSTAINABLE FORESTRY INITIATIVE Weyerhaeuser warrants that the sizing of its products will be in accordance with Weyerhaeuser product design criteria and published design values. `YY( 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 8/15/2013 2:01:52 PM Foe v4.0, Design Engine:ine:V5.6.2.222 Bauer SolarCity JB-9721606-00 work.4te47896 i bauer@solarcity.com Page 1 of 1 a F O R T E MEMBER REPORT 9721606,MP2 PASSED 1 piece(s) 2 x 4 Douglas Fir-Larch No. 1 @ 24" OC • ' Overall Sloped Length:1 r 10 Ire" o + _ o J' ri 4 n ' „ „ I 2'2' ,� T 9' I- 6'10' r 1 ©f E 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) 663 @ 9'11" 3459(3.50") Passed(19%) -- 1.0 D+1.0 S(Adj Spans) Member Type:Joist Shear(lbs) 307 @ 9'5 15/16" 725 Passed(42%) 1.15 1.0 D+1.0 S(Adj Spans) Building Use:Residential Moment(Ft-lbs) -473 @ 9'11" 506 Passed(93%) 1.15 1.0 D+1.0 S(Adj Spans) Building Code:IBC - Live Load Def.(in) 0.251 @ 5'9 7/16" 0.408 Passed(L/390) -- 1.0 D+1.0 S(Alt Spans) Design Methodology:ASD Total Load Def.(in) 0.340 @ 5'9 1/8" 0.545 Passed(L/289) -- 1.0 D+1.0 S(Alt Spans) Member Pitch:4/12 • 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 6'10 9/16"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-DF 3.50" 3.50" 1.50" 116 287 403 Blocking 2-Beveled Plate-OF 3.50" 3.50" 1.50" 219 444 663 None 3-Beveled Plate-DF 3.50" 3.50" 1.50" 61 150 211 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 16'10 3/4" 24" 9.0 - Roof DL 2-Uniform(PSF) 0 to 16'10 3/4" 24" - 25.0 Roof SL 3-Uniform(PSF) 3'9"to 15'8" 24" 3.0 - PV Attachment DL Weyerhaeuser Notes 0 SUSTAINABLE FORESTRY INITIATIVE Weyerhaeuser warrants that the sizing of its products will be in accordance with Weyerhaeuser product design criteria and published design values. 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 8/15/2013 2:04:49 PM Jake Bauer Forte v4.0,Design Engine:V5.6.2.222 SolarCity 9 g (714)274-7896 JB-9721606-00 work.4te j bauer©solarcity.corn Page 1 of 1 l F O R T E . MEMBER REPORT 9721606,MP3 PASSED 1 piece(s) 2 x 4 Douglas Fir-Larch No. 1 @ 24" OC • Overall Sloped Length:11'91/8' • + 111111111111111111_ a + D 4 II r r, .r Z 3'S 4. 5'4- 0 El 0 All locations are measured from the outside face of left support(or left cantilever end).All dimensions are horizontal. Design Results Actual @ Location Allowed Result LDF Load:Combination(Pattern) System:Roof Member Reaction(lbs) 382 @ 5'7" 3459(3.50") Passed(11%) -- 1.0 D+1.0 S(Adj Spans) Member Type:Joist Shear(lbs) 200 @ 6'1/16" 725 Passed(28%) 1.15 1.0 D+1.0 S(Adj Spans) Building Use:Residential Moment(Ft-lbs) 187 @ 8'7 1/16" 506 Passed(37%) 1.15 1.0 D+1.0 S(Alt Spans) Building Code:IBC Live Load Defl.(in) 0.096 @ 0 0.228 Passed(2L/570) -- 1.0 D+1.0 S(Alt Spans) Design Methodology:ASD Total Load Defl.(in) 0.128 @ 0 0.305 Passed(2L/430) -- 1.0 D+1.0 S(Alt Spans) Member Pitch:4/12 •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 11'7 15/16"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-DF 3.50" 3.50" 1.50" 87 211 298 Blocking 2-Beveled Plate-DF 3.50" 3.50" 1.50" 122 259 381 None 3-Beveled Plate-DF 3.50" 3.50" 1.50" 52 124 176 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 11'3/4" 24" 9.0 - Roof DL 2-Uniform(PSF) 0 to 11'3/4" 24" - 25.0 Roof SL 3-Uniform(PSF) 1'3"to 9'6" 24" 3.0 - PV Attachment DL Weyerhaeuser Notes 0 SUSTAINABLE FORESTRY INITIATIVE Weyerhaeuser warrants that the sizing of its products will be in accordance with Weyerhaeuser product design criteria and published design values. `(YY( 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 8/15/2013 2:06:39 PM Jake Bauer Forte v4.0,Design Engine:V5.6.2.222 Solaraty (714)274-7896 jbauer@solarcity.com JB-9721606 00 work.4te Page 1 of 1